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java监测服务器信息（cpu,内存,运行时间等），springboot监控服务器信息_java如何监控服务器cpu,内存大小

作者：编程探险家2 | 2024-02-04 13:50:18

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java如何监控服务器cpu,内存大小

目录

1.添加工程依赖

<!-- 父工程中-->    
<properties>
	<oshi.version>5.8.2</oshi.version>
</properties>


<!-- 获取系统信息 -->
<dependency>
   <groupId>com.github.oshi</groupId>
   <artifactId>oshi-core</artifactId>
   <version>${oshi.version}</version>
</dependency>


<!-- 子工程中-->

<!-- 获取系统信息 -->
<dependency>
    <groupId>com.github.oshi</groupId>
    <artifactId>oshi-core</artifactId>
</dependency>

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2. 依赖工具类

代码在最后边。(或者直接下载：下载地址)

目录结构展示：

- domain
	- ServerInfo.java
	- model
		- Cpu.java
		- Jvm.java
		- Mem.java
		- Sys.java
		- SysFile.java
	- utils
		- Arith.java
		- Convert.java
		- DateUtils.java
		- EscapeUtil.java
		- HTMLFilter.java
		- IpUtils.java
		- StrFormatter.java
		- ServerStringUtils.java

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3. 使用

    @PostMapping("cc")
    public Result cc() throws Exception {
        ServerInfo info = new ServerInfo();
        info.copyInfo();
        return new Result(info);
    }

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PS：工具类代码

model
Cpu.java
package com.sq.common.domain.model;

import com.sq.common.domain.utils.Arith;
/**
 * CPU相关信息
 */
public class Cpu {
    /**
     * 核心数
     */
    private int cpuNum;
    /**
     * CPU总的使用率
     */
    private double total;
    /**
     * CPU系统使用率
     */
    private double sys;
    /**
     * CPU用户使用率
     */
    private double used;
    /**
     * CPU当前等待率
     */
    private double wait;
    /**
     * CPU当前空闲率
     */
    private double free;
    public int getCpuNum() {        return cpuNum;    }
    public void setCpuNum(int cpuNum) {        this.cpuNum = cpuNum;    }
    public double getTotal() {        return Arith.round(Arith.mul(total, 100), 2);    }
    public void setTotal(double total) {        this.total = total;    }
    public double getSys() {        return Arith.round(Arith.mul(sys / total, 100), 2);    }
    public void setSys(double sys) {        this.sys = sys;    }
    public double getUsed() {        return Arith.round(Arith.mul(used / total, 100), 2);    }
    public void setUsed(double used) {        this.used = used;    }
    public double getWait() {        return Arith.round(Arith.mul(wait / total, 100), 2);    }
    public void setWait(double wait) {        this.wait = wait;    }
    public double getFree() {        return Arith.round(Arith.mul(free / total, 100), 2);    }
    public void setFree(double free) {        this.free = free;    }
}

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Jvm.java
package com.sq.common.domain.model;

import com.sq.common.domain.utils.Arith;
import com.sq.common.domain.utils.DateUtils;

import java.lang.management.ManagementFactory;

/**
 * JVM相关信息
 */
public class Jvm {
    /**
     * 当前JVM占用的内存总数(M)
     */
    private double total;
    /**
     * JVM最大可用内存总数(M)
     */
    private double max;
    /**
     * JVM空闲内存(M)
     */
    private double free;
    /**
     * JDK版本
     */
    private String version;
    /**
     * JDK路径
     */
    private String home;
    public double getTotal() {        return Arith.div(total, (1024 * 1024), 2);    }
    public void setTotal(double total) {        this.total = total;    }
    public double getMax() {        return Arith.div(max, (1024 * 1024), 2);    }
    public void setMax(double max) {        this.max = max;    }
    public double getFree() {        return Arith.div(free, (1024 * 1024), 2);    }
    public void setFree(double free) {        this.free = free;    }
    public double getUsed() {        return Arith.div(total - free, (1024 * 1024), 2);    }
    public double getUsage() {        return Arith.mul(Arith.div(total - free, total, 4), 100);    }
    /**
     * 获取JDK名称
     */
    public String getName() {        return ManagementFactory.getRuntimeMXBean().getVmName();    }
    public String getVersion() {
        return version;
    }
    public void setVersion(String version) {        this.version = version;    }
    public String getHome() {        return home;    }
    public void setHome(String home) {        this.home = home;    }
    /**
     * JDK启动时间
     */
    public String getStartTime() {        return DateUtils.parseDateToStr(DateUtils.YYYY_MM_DD_HH_MM_SS, DateUtils.getServerStartDate());    }
    /**
     * JDK运行时间
     */
    public String getRunTime() {        return DateUtils.getDatePoor(DateUtils.getNowDate(), DateUtils.getServerStartDate());    }
}


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Mem.java
package com.sq.common.domain.model;

import com.sq.common.domain.utils.Arith;

/**
 * 內存相关信息
 */
public class Mem {
    /**
     * 内存总量
     */
    private double total;
    /**
     * 已用内存
     */
    private double used;
    /**
     * 剩余内存
     */
    private double free;
    public double getTotal() {        return Arith.div(total, (1024 * 1024 * 1024), 2);    }
    public void setTotal(long total) {        this.total = total;    }
    public double getUsed() {        return Arith.div(used, (1024 * 1024 * 1024), 2);    }
    public void setUsed(long used) {        this.used = used;    }
    public double getFree() {        return Arith.div(free, (1024 * 1024 * 1024), 2);    }
    public void setFree(long free) {        this.free = free;    }
    public double getUsage() {        return Arith.mul(Arith.div(used, total, 4), 100);    }
}


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Sys.java
package com.sq.common.domain.model;

/**
 * 系统相关信息
 */
public class Sys {
    /**
     * 服务器名称
     */
    private String computerName;
    /**
     * 服务器Ip
     */
    private String computerIp;
    /**
     * 项目路径
     */
    private String userDir;
    /**
     * 操作系统
     */
    private String osName;
    /**
     * 系统架构
     */
    private String osArch;
    public String getComputerName() {        return computerName;    }
    public void setComputerName(String computerName) {        this.computerName = computerName;    }
    public String getComputerIp() {        return computerIp;    }
    public void setComputerIp(String computerIp) {        this.computerIp = computerIp;    }
    public String getUserDir() {        return userDir;    }
    public void setUserDir(String userDir) {        this.userDir = userDir;    }
    public String getOsName() {        return osName;    }
    public void setOsName(String osName) {        this.osName = osName;    }
    public String getOsArch() {        return osArch;    }
    public void setOsArch(String osArch) {        this.osArch = osArch;    }
}


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SysFile.java
package com.sq.common.domain.model;

/**
 * 系统文件相关信息
 */
public class SysFile {
    /**
     * 盘符路径
     */
    private String dirName;
    /**
     * 盘符类型
     */
    private String sysTypeName;
    /**
     * 文件类型
     */
    private String typeName;
    /**
     * 总大小
     */
    private String total;
    /**
     * 剩余大小
     */
    private String free;
    /**
     * 已经使用量
     */
    private String used;
    /**
     * 资源的使用率
     */
    private double usage;
    public String getDirName() {        return dirName;    }
    public void setDirName(String dirName) {        this.dirName = dirName;    }
    public String getSysTypeName() {        return sysTypeName;    }
    public void setSysTypeName(String sysTypeName) {        this.sysTypeName = sysTypeName;    }
    public String getTypeName() {        return typeName;    }
    public void setTypeName(String typeName) {        this.typeName = typeName;    }
    public String getTotal() {        return total;    }
    public void setTotal(String total) {        this.total = total;    }
    public String getFree() {        return free;    }
    public void setFree(String free) {        this.free = free;    }
    public String getUsed() {        return used;    }
    public void setUsed(String used) {        this.used = used;    }
    public double getUsage() {        return usage;    }
    public void setUsage(double usage) {        this.usage = usage;    }
}


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utils
Arith.java
package com.sq.common.domain.utils;

import java.math.BigDecimal;
import java.math.RoundingMode;

/**
 * 精确的浮点数运算
 */
public class Arith {

    /**
     * 默认除法运算精度
     */
    private static final int DEF_DIV_SCALE = 10;

    /**
     * 这个类不能实例化
     */
    private Arith() {
    }

    /**
     * 提供精确的加法运算。
     *
     * @param v1 被加数
     * @param v2 加数
     * @return 两个参数的和
     */
    public static double add(double v1, double v2) {
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.add(b2).doubleValue();
    }

    /**
     * 提供精确的减法运算。
     *
     * @param v1 被减数
     * @param v2 减数
     * @return 两个参数的差
     */
    public static double sub(double v1, double v2) {
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.subtract(b2).doubleValue();
    }

    /**
     * 提供精确的乘法运算。
     *
     * @param v1 被乘数
     * @param v2 乘数
     * @return 两个参数的积
     */
    public static double mul(double v1, double v2) {
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.multiply(b2).doubleValue();
    }

    /**
     * 提供（相对）精确的除法运算，当发生除不尽的情况时，精确到
     * 小数点以后10位，以后的数字四舍五入。
     *
     * @param v1 被除数
     * @param v2 除数
     * @return 两个参数的商
     */
    public static double div(double v1, double v2) {
        return div(v1, v2, DEF_DIV_SCALE);
    }

    /**
     * 提供（相对）精确的除法运算。当发生除不尽的情况时，由scale参数指
     * 定精度，以后的数字四舍五入。
     *
     * @param v1    被除数
     * @param v2    除数
     * @param scale 表示表示需要精确到小数点以后几位。
     * @return 两个参数的商
     */
    public static double div(double v1, double v2, int scale) {
        if (scale < 0) {
            throw new IllegalArgumentException(
                    "The scale must be a positive integer or zero");
        }
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        if (b1.compareTo(BigDecimal.ZERO) == 0) {
            return BigDecimal.ZERO.doubleValue();
        }
        return b1.divide(b2, scale, RoundingMode.HALF_UP).doubleValue();
    }

    /**
     * 提供精确的小数位四舍五入处理。
     *
     * @param v     需要四舍五入的数字
     * @param scale 小数点后保留几位
     * @return 四舍五入后的结果
     */
    public static double round(double v, int scale) {
        if (scale < 0) {
            throw new IllegalArgumentException(
                    "The scale must be a positive integer or zero");
        }
        BigDecimal b = new BigDecimal(Double.toString(v));
        BigDecimal one = BigDecimal.ONE;
        return b.divide(one, scale, RoundingMode.HALF_UP).doubleValue();
    }
}




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Convert.java
package com.sq.common.domain.utils;

import org.apache.commons.lang3.ArrayUtils;

import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;

/**
 * 类型转换器
 */
public class Convert {

    /**
     * 将对象转为字符串<br>
     */
    public static String utf8Str(Object obj) {
        return str(obj, StandardCharsets.UTF_8);
    }

    /**
     * 将对象转为字符串<br>
     */
    public static String str(Object obj, Charset charset) {
        if (null == obj) {
            return null;
        }
        if (obj instanceof String) {
            return (String) obj;
        } else if (obj instanceof byte[]) {
            return str((byte[]) obj, charset);
        } else if (obj instanceof Byte[]) {
            byte[] bytes = ArrayUtils.toPrimitive((Byte[]) obj);
            return str(bytes, charset);
        } else if (obj instanceof ByteBuffer) {
            return str((ByteBuffer) obj, charset);
        }
        return obj.toString();
    }

    /**
     * 解码字节码
     */
    public static String str(byte[] data, Charset charset) {
        if (data == null) {
            return null;
        }
        if (null == charset) {
            return new String(data);
        }
        return new String(data, charset);
    }

    /**
     * 将编码的byteBuffer数据转换为字符串
     */
    public static String str(ByteBuffer data, Charset charset) {
        if (null == charset) {
            charset = Charset.defaultCharset();
        }
        return charset.decode(data).toString();
    }

}



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DateUtils.java
package com.sq.common.domain.utils;

import java.lang.management.ManagementFactory;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * 时间工具类
 */
public class DateUtils extends org.apache.commons.lang3.time.DateUtils {

    public static String YYYY_MM_DD = "yyyy-MM-dd";

    public static String YYYY_MM_DD_HH_MM_SS = "yyyy-MM-dd HH:mm:ss";

    /**
     * 获取当前Date型日期
     */
    public static Date getNowDate() {
        return new Date();
    }

    /**
     * 获取当前日期, 默认格式为yyyy-MM-dd
     */
    public static String getDate() {
        return dateTimeNow(YYYY_MM_DD);
    }

    public static final String getTime() {
        return dateTimeNow(YYYY_MM_DD_HH_MM_SS);
    }


    public static final String dateTimeNow(final String format) {
        return parseDateToStr(format, new Date());
    }


    public static final String parseDateToStr(final String format, final Date date) {
        return new SimpleDateFormat(format).format(date);
    }

    /**
     * 获取服务器启动时间
     */
    public static Date getServerStartDate() {
        long time = ManagementFactory.getRuntimeMXBean().getStartTime();
        return new Date(time);
    }

    /**
     * 计算两个时间差
     */
    public static String getDatePoor(Date endDate, Date nowDate) {
        long nd = 1000 * 24 * 60 * 60;
        long nh = 1000 * 60 * 60;
        long nm = 1000 * 60;
        // long ns = 1000;
        // 获得两个时间的毫秒时间差异
        long diff = endDate.getTime() - nowDate.getTime();
        // 计算差多少天
        long day = diff / nd;
        // 计算差多少小时
        long hour = diff % nd / nh;
        // 计算差多少分钟
        long min = diff % nd % nh / nm;
        // 计算差多少秒//输出结果
        // long sec = diff % nd % nh % nm / ns;
        return day + "天" + hour + "小时" + min + "分钟";
    }
}



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EscapeUtil.java
package com.sq.common.domain.utils;

/**
 * 转义和反转义工具类
 */
public class EscapeUtil {

    private static final char[][] TEXT = new char[64][];

    static {
        for (int i = 0; i < 64; i++) {
            TEXT[i] = new char[]{(char) i};
        }
        // special HTML characters
        TEXT['\''] = "&#039;".toCharArray(); // 单引号
        TEXT['"'] = "&#34;".toCharArray(); // 双引号
        TEXT['&'] = "&#38;".toCharArray(); // &符
        TEXT['<'] = "&#60;".toCharArray(); // 小于号
        TEXT['>'] = "&#62;".toCharArray(); // 大于号
    }

    /**
     * 转义文本中的HTML字符为安全的字符
     *
     * @param text 被转义的文本
     * @return 转义后的文本
     */
    public static String escape(String text) {
        return encode(text);
    }

    /**
     * 还原被转义的HTML特殊字符
     *
     * @param content 包含转义符的HTML内容
     * @return 转换后的字符串
     */
    public static String unescape(String content) {
        return decode(content);
    }

    /**
     * 清除所有HTML标签，但是不删除标签内的内容
     *
     * @param content 文本
     * @return 清除标签后的文本
     */
    public static String clean(String content) {
        return new HTMLFilter().filter(content);
    }

    /**
     * Escape编码
     *
     * @param text 被编码的文本
     * @return 编码后的字符
     */
    private static String encode(String text) {
        if (ServerStringUtils.isEmpty(text)) {
            return ServerStringUtils.EMPTY;
        }

        final StringBuilder tmp = new StringBuilder(text.length() * 6);
        char c;
        for (int i = 0; i < text.length(); i++) {
            c = text.charAt(i);
            if (c < 256) {
                tmp.append("%");
                if (c < 16) {
                    tmp.append("0");
                }
                tmp.append(Integer.toString(c, 16));
            } else {
                tmp.append("%u");
                if (c <= 0xfff) {
                    // issue#I49JU8@Gitee
                    tmp.append("0");
                }
                tmp.append(Integer.toString(c, 16));
            }
        }
        return tmp.toString();
    }

    /**
     * Escape解码
     *
     * @param content 被转义的内容
     * @return 解码后的字符串
     */
    public static String decode(String content) {
        if (ServerStringUtils.isEmpty(content)) {
            return content;
        }

        StringBuilder tmp = new StringBuilder(content.length());
        int lastPos = 0, pos = 0;
        char ch;
        while (lastPos < content.length()) {
            pos = content.indexOf("%", lastPos);
            if (pos == lastPos) {
                if (content.charAt(pos + 1) == 'u') {
                    ch = (char) Integer.parseInt(content.substring(pos + 2, pos + 6), 16);
                    tmp.append(ch);
                    lastPos = pos + 6;
                } else {
                    ch = (char) Integer.parseInt(content.substring(pos + 1, pos + 3), 16);
                    tmp.append(ch);
                    lastPos = pos + 3;
                }
            } else {
                if (pos == -1) {
                    tmp.append(content.substring(lastPos));
                    lastPos = content.length();
                } else {
                    tmp.append(content.substring(lastPos, pos));
                    lastPos = pos;
                }
            }
        }
        return tmp.toString();
    }
}



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HtmlFilter.java
package com.sq.common.domain.utils;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * HTML过滤器，用于去除XSS漏洞隐患。
 */
public final class HTMLFilter {
    /**
     * regex flag union representing /si modifiers in php
     **/
    private static final int REGEX_FLAGS_SI = Pattern.CASE_INSENSITIVE | Pattern.DOTALL;
    private static final Pattern P_COMMENTS = Pattern.compile("<!--(.*?)-->", Pattern.DOTALL);
    private static final Pattern P_COMMENT = Pattern.compile("^!--(.*)--$", REGEX_FLAGS_SI);
    private static final Pattern P_TAGS = Pattern.compile("<(.*?)>", Pattern.DOTALL);
    private static final Pattern P_END_TAG = Pattern.compile("^/([a-z0-9]+)", REGEX_FLAGS_SI);
    private static final Pattern P_START_TAG = Pattern.compile("^([a-z0-9]+)(.*?)(/?)$", REGEX_FLAGS_SI);
    private static final Pattern P_QUOTED_ATTRIBUTES = Pattern.compile("([a-z0-9]+)=([\"'])(.*?)\\2", REGEX_FLAGS_SI);
    private static final Pattern P_UNQUOTED_ATTRIBUTES = Pattern.compile("([a-z0-9]+)(=)([^\"\\s']+)", REGEX_FLAGS_SI);
    private static final Pattern P_PROTOCOL = Pattern.compile("^([^:]+):", REGEX_FLAGS_SI);
    private static final Pattern P_ENTITY = Pattern.compile("&#(\\d+);?");
    private static final Pattern P_ENTITY_UNICODE = Pattern.compile("&#x([0-9a-f]+);?");
    private static final Pattern P_ENCODE = Pattern.compile("%([0-9a-f]{2});?");
    private static final Pattern P_VALID_ENTITIES = Pattern.compile("&([^&;]*)(?=(;|&|$))");
    private static final Pattern P_VALID_QUOTES = Pattern.compile("(>|^)([^<]+?)(<|$)", Pattern.DOTALL);
    private static final Pattern P_END_ARROW = Pattern.compile("^>");
    private static final Pattern P_BODY_TO_END = Pattern.compile("<([^>]*?)(?=<|$)");
    private static final Pattern P_XML_CONTENT = Pattern.compile("(^|>)([^<]*?)(?=>)");
    private static final Pattern P_STRAY_LEFT_ARROW = Pattern.compile("<([^>]*?)(?=<|$)");
    private static final Pattern P_STRAY_RIGHT_ARROW = Pattern.compile("(^|>)([^<]*?)(?=>)");
    private static final Pattern P_AMP = Pattern.compile("&");
    private static final Pattern P_QUOTE = Pattern.compile("\"");
    private static final Pattern P_LEFT_ARROW = Pattern.compile("<");
    private static final Pattern P_RIGHT_ARROW = Pattern.compile(">");
    private static final Pattern P_BOTH_ARROWS = Pattern.compile("<>");

    private static final ConcurrentMap<String, Pattern> P_REMOVE_PAIR_BLANKS = new ConcurrentHashMap<>();
    private static final ConcurrentMap<String, Pattern> P_REMOVE_SELF_BLANKS = new ConcurrentHashMap<>();

    /**
     * set of allowed html elements, along with allowed attributes for each element
     **/
    private final Map<String, List<String>> vAllowed;
    /**
     * counts of open tags for each (allowable) html element
     **/
    private final Map<String, Integer> vTagCounts = new HashMap<>();

    /**
     * html elements which must always be self-closing (e.g. "<img />")
     **/
    private final String[] vSelfClosingTags;
    /**
     * html elements which must always have separate opening and closing tags (e.g. "<b></b>")
     **/
    private final String[] vNeedClosingTags;
    /**
     * set of disallowed html elements
     **/
    private final String[] vDisallowed;
    /**
     * attributes which should be checked for valid protocols
     **/
    private final String[] vProtocolAtts;
    /**
     * allowed protocols
     **/
    private final String[] vAllowedProtocols;
    /**
     * tags which should be removed if they contain no content (e.g. "<b></b>" or "<b />")
     **/
    private final String[] vRemoveBlanks;
    /**
     * entities allowed within html markup
     **/
    private final String[] vAllowedEntities;
    /**
     * flag determining whether comments are allowed in input String.
     */
    private final boolean stripComment;
    private final boolean encodeQuotes;
    /**
     * flag determining whether to try to make tags when presented with "unbalanced" angle brackets (e.g. "<b text </b>"
     * becomes "<b> text </b>"). If set to false, unbalanced angle brackets will be html escaped.
     */
    private final boolean alwaysMakeTags;

    /**
     * Default constructor.
     */
    public HTMLFilter() {
        vAllowed = new HashMap<>();

        final ArrayList<String> a_atts = new ArrayList<>();
        a_atts.add("href");
        a_atts.add("target");
        vAllowed.put("a", a_atts);

        final ArrayList<String> img_atts = new ArrayList<>();
        img_atts.add("src");
        img_atts.add("width");
        img_atts.add("height");
        img_atts.add("alt");
        vAllowed.put("img", img_atts);

        final ArrayList<String> no_atts = new ArrayList<>();
        vAllowed.put("b", no_atts);
        vAllowed.put("strong", no_atts);
        vAllowed.put("i", no_atts);
        vAllowed.put("em", no_atts);

        vSelfClosingTags = new String[]{"img"};
        vNeedClosingTags = new String[]{"a", "b", "strong", "i", "em"};
        vDisallowed = new String[]{};
        vAllowedProtocols = new String[]{"http", "mailto", "https"}; // no ftp.
        vProtocolAtts = new String[]{"src", "href"};
        vRemoveBlanks = new String[]{"a", "b", "strong", "i", "em"};
        vAllowedEntities = new String[]{"amp", "gt", "lt", "quot"};
        stripComment = true;
        encodeQuotes = true;
        alwaysMakeTags = false;
    }


    private void reset() {
        vTagCounts.clear();
    }

    public static String chr(final int decimal) {
        return String.valueOf((char) decimal);
    }

    public static String htmlSpecialChars(final String s) {
        String result = s;
        result = regexReplace(P_AMP, "&amp;", result);
        result = regexReplace(P_QUOTE, "&quot;", result);
        result = regexReplace(P_LEFT_ARROW, "&lt;", result);
        result = regexReplace(P_RIGHT_ARROW, "&gt;", result);
        return result;
    }

    public String filter(final String input) {
        reset();
        String s = input;

        s = escapeComments(s);

        s = balanceHTML(s);

        s = checkTags(s);

        s = processRemoveBlanks(s);

        // s = validateEntities(s);

        return s;
    }


    private String escapeComments(final String s) {
        final Matcher m = P_COMMENTS.matcher(s);
        final StringBuffer buf = new StringBuffer();
        if (m.find()) {
            final String match = m.group(1); // (.*?)
            m.appendReplacement(buf, Matcher.quoteReplacement("<!--" + htmlSpecialChars(match) + "-->"));
        }
        m.appendTail(buf);

        return buf.toString();
    }

    private String balanceHTML(String s) {
        if (alwaysMakeTags) {
            s = regexReplace(P_END_ARROW, "", s);
            // 不追加结束标签
            s = regexReplace(P_BODY_TO_END, "<$1>", s);
            s = regexReplace(P_XML_CONTENT, "$1<$2", s);

        } else {
            s = regexReplace(P_STRAY_LEFT_ARROW, "&lt;$1", s);
            s = regexReplace(P_STRAY_RIGHT_ARROW, "$1$2&gt;<", s);

            s = regexReplace(P_BOTH_ARROWS, "", s);
        }

        return s;
    }

    private String checkTags(String s) {
        Matcher m = P_TAGS.matcher(s);

        final StringBuffer buf = new StringBuffer();
        while (m.find()) {
            String replaceStr = m.group(1);
            replaceStr = processTag(replaceStr);
            m.appendReplacement(buf, Matcher.quoteReplacement(replaceStr));
        }
        m.appendTail(buf);

        final StringBuilder sBuilder = new StringBuilder(buf.toString());
        for (String key : vTagCounts.keySet()) {
            for (int ii = 0; ii < vTagCounts.get(key); ii++) {
                sBuilder.append("</").append(key).append(">");
            }
        }
        s = sBuilder.toString();

        return s;
    }

    private String processRemoveBlanks(final String s) {
        String result = s;
        for (String tag : vRemoveBlanks) {
            if (!P_REMOVE_PAIR_BLANKS.containsKey(tag)) {
                P_REMOVE_PAIR_BLANKS.putIfAbsent(tag, Pattern.compile("<" + tag + "(\\s[^>]*)?></" + tag + ">"));
            }
            result = regexReplace(P_REMOVE_PAIR_BLANKS.get(tag), "", result);
            if (!P_REMOVE_SELF_BLANKS.containsKey(tag)) {
                P_REMOVE_SELF_BLANKS.putIfAbsent(tag, Pattern.compile("<" + tag + "(\\s[^>]*)?/>"));
            }
            result = regexReplace(P_REMOVE_SELF_BLANKS.get(tag), "", result);
        }

        return result;
    }

    private static String regexReplace(final Pattern regex_pattern, final String replacement, final String s) {
        Matcher m = regex_pattern.matcher(s);
        return m.replaceAll(replacement);
    }

    private String processTag(final String s) {
        // ending tags
        Matcher m = P_END_TAG.matcher(s);
        if (m.find()) {
            final String name = m.group(1).toLowerCase();
            if (allowed(name)) {
                if (!inArray(name, vSelfClosingTags)) {
                    if (vTagCounts.containsKey(name)) {
                        vTagCounts.put(name, vTagCounts.get(name) - 1);
                        return "</" + name + ">";
                    }
                }
            }
        }

        m = P_START_TAG.matcher(s);
        if (m.find()) {
            final String name = m.group(1).toLowerCase();
            final String body = m.group(2);
            String ending = m.group(3);

            if (allowed(name)) {
                final StringBuilder params = new StringBuilder();

                final Matcher m2 = P_QUOTED_ATTRIBUTES.matcher(body);
                final Matcher m3 = P_UNQUOTED_ATTRIBUTES.matcher(body);
                final List<String> paramNames = new ArrayList<>();
                final List<String> paramValues = new ArrayList<>();
                while (m2.find()) {
                    paramNames.add(m2.group(1)); // ([a-z0-9]+)
                    paramValues.add(m2.group(3)); // (.*?)
                }
                while (m3.find()) {
                    paramNames.add(m3.group(1)); // ([a-z0-9]+)
                    paramValues.add(m3.group(3)); // ([^\"\\s']+)
                }

                String paramName, paramValue;
                for (int ii = 0; ii < paramNames.size(); ii++) {
                    paramName = paramNames.get(ii).toLowerCase();
                    paramValue = paramValues.get(ii);
                    if (allowedAttribute(name, paramName)) {
                        if (inArray(paramName, vProtocolAtts)) {
                            paramValue = processParamProtocol(paramValue);
                        }
                        params.append(' ').append(paramName).append("=\\\"").append(paramValue).append("\"");
                    }
                }
                if (inArray(name, vSelfClosingTags)) {
                    ending = " /";
                }
                if (inArray(name, vNeedClosingTags)) {
                    ending = "";
                }
                if (ending == null || ending.length() < 1) {
                    if (vTagCounts.containsKey(name)) {
                        vTagCounts.put(name, vTagCounts.get(name) + 1);
                    } else {
                        vTagCounts.put(name, 1);
                    }
                } else {
                    ending = " /";
                }
                return "<" + name + params + ending + ">";
            } else {
                return "";
            }
        }
        m = P_COMMENT.matcher(s);
        if (!stripComment && m.find()) {
            return "<" + m.group() + ">";
        }
        return "";
    }

    private String processParamProtocol(String s) {
        s = decodeEntities(s);
        final Matcher m = P_PROTOCOL.matcher(s);
        if (m.find()) {
            final String protocol = m.group(1);
            if (!inArray(protocol, vAllowedProtocols)) {
                s = "#" + s.substring(protocol.length() + 1);
                if (s.startsWith("#//")) {
                    s = "#" + s.substring(3);
                }
            }
        }
        return s;
    }

    private String decodeEntities(String s) {
        StringBuffer buf = new StringBuffer();

        Matcher m = P_ENTITY.matcher(s);
        while (m.find()) {
            final String match = m.group(1);
            final int decimal = Integer.decode(match).intValue();
            m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
        }
        m.appendTail(buf);
        s = buf.toString();

        buf = new StringBuffer();
        m = P_ENTITY_UNICODE.matcher(s);
        while (m.find()) {
            final String match = m.group(1);
            final int decimal = Integer.valueOf(match, 16).intValue();
            m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
        }
        m.appendTail(buf);
        s = buf.toString();

        buf = new StringBuffer();
        m = P_ENCODE.matcher(s);
        while (m.find()) {
            final String match = m.group(1);
            final int decimal = Integer.valueOf(match, 16).intValue();
            m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
        }
        m.appendTail(buf);
        s = buf.toString();

        s = validateEntities(s);
        return s;
    }

    private String validateEntities(final String s) {
        StringBuffer buf = new StringBuffer();

        // validate entities throughout the string
        Matcher m = P_VALID_ENTITIES.matcher(s);
        while (m.find()) {
            final String one = m.group(1); // ([^&;]*)
            final String two = m.group(2); // (?=(;|&|$))
            m.appendReplacement(buf, Matcher.quoteReplacement(checkEntity(one, two)));
        }
        m.appendTail(buf);

        return encodeQuotes(buf.toString());
    }

    private String encodeQuotes(final String s) {
        if (encodeQuotes) {
            StringBuffer buf = new StringBuffer();
            Matcher m = P_VALID_QUOTES.matcher(s);
            while (m.find()) {
                final String one = m.group(1); // (>|^)
                final String two = m.group(2); // ([^<]+?)
                final String three = m.group(3); // (<|$)
                // 不替换双引号为&quot;，防止json格式无效 regexReplace(P_QUOTE, "&quot;", two)
                m.appendReplacement(buf, Matcher.quoteReplacement(one + two + three));
            }
            m.appendTail(buf);
            return buf.toString();
        } else {
            return s;
        }
    }

    private String checkEntity(final String preamble, final String term) {

        return ";".equals(term) && isValidEntity(preamble) ? '&' + preamble : "&amp;" + preamble;
    }

    private boolean isValidEntity(final String entity) {
        return inArray(entity, vAllowedEntities);
    }

    private static boolean inArray(final String s, final String[] array) {
        for (String item : array) {
            if (item != null && item.equals(s)) {
                return true;
            }
        }
        return false;
    }

    private boolean allowed(final String name) {
        return (vAllowed.isEmpty() || vAllowed.containsKey(name)) && !inArray(name, vDisallowed);
    }

    private boolean allowedAttribute(final String name, final String paramName) {
        return allowed(name) && (vAllowed.isEmpty() || vAllowed.get(name).contains(paramName));
    }
}


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IpUtils.java
package com.sq.common.domain.utils;

import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * 获取IP方法
 */
public class IpUtils {

    public static String getHostIp() {
        try {
            return InetAddress.getLocalHost().getHostAddress();
        } catch (UnknownHostException e) {
        }
        return "127.0.0.1";
    }

    public static String getHostName() {
        try {
            return InetAddress.getLocalHost().getHostName();
        } catch (UnknownHostException e) {
        }
        return "未知";
    }
}


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StrFormatter.java
package com.sq.common.domain.utils;

import java.util.Collection;
import java.util.Map;

/**
 * 字符串工具类
 */
public class ServerStringUtils extends org.apache.commons.lang3.StringUtils {
    /**
     * 空字符串
     */
    private static final String NULLSTR = "";

    /**
     * * 判断一个Collection是否为空， 包含List，Set，Queue
     */
    public static boolean isEmpty(Collection<?> coll) {
        return isNull(coll) || coll.isEmpty();
    }

    /**
     * * 判断一个对象数组是否为空
     */
    public static boolean isEmpty(Object[] objects) {
        return isNull(objects) || (objects.length == 0);
    }

    /**
     * * 判断一个Map是否为空
     */
    public static boolean isEmpty(Map<?, ?> map) {
        return isNull(map) || map.isEmpty();
    }

    /**
     * * 判断一个字符串是否为空串
     */
    public static boolean isEmpty(String str) {
        return isNull(str) || NULLSTR.equals(str.trim());
    }

    /**
     * * 判断一个对象是否为空
     */
    public static boolean isNull(Object object) {
        return object == null;
    }

    /**
     * 截取字符串
     */
    public static String substring(final String str, int start) {
        if (str == null) {
            return NULLSTR;
        }
        if (start < 0) {
            start = str.length() + start;
        }
        if (start < 0) {
            start = 0;
        }
        if (start > str.length()) {
            return NULLSTR;
        }
        return str.substring(start);
    }

    /**
     * 截取字符串
     */
    public static String substring(final String str, int start, int end) {
        if (str == null) {
            return NULLSTR;
        }

        if (end < 0) {
            end = str.length() + end;
        }
        if (start < 0) {
            start = str.length() + start;
        }

        if (end > str.length()) {
            end = str.length();
        }

        if (start > end) {
            return NULLSTR;
        }

        if (start < 0) {
            start = 0;
        }
        if (end < 0) {
            end = 0;
        }
        return str.substring(start, end);
    }

}


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ServerStringUtils.java
package com.sq.common.domain.utils;

/**
 * 字符串格式化
 */
public class StrFormatter {
    public static final String EMPTY_JSON = "{}";
    public static final char C_BACKSLASH = '\\';
    public static final char C_DELIM_START = '{';
    public static final char C_DELIM_END = '}';

    /**
     * 格式化字符串<br>
     * 此方法只是简单将占位符 {} 按照顺序替换为参数<br>
     * 如果想输出 {} 使用 \\转义 { 即可，如果想输出 {} 之前的 \ 使用双转义符 \\\\ 即可<br>
     * 例：<br>
     * 通常使用：format("this is {} for {}", "a", "b") -> this is a for b<br>
     * 转义{}： format("this is \\{} for {}", "a", "b") -> this is \{} for a<br>
     * 转义\： format("this is \\\\{} for {}", "a", "b") -> this is \a for b<br>
     *
     * @param strPattern 字符串模板
     * @param argArray   参数列表
     * @return 结果
     */
    public static String format(final String strPattern, final Object... argArray) {
        if (ServerStringUtils.isEmpty(strPattern) || ServerStringUtils.isEmpty(argArray)) {
            return strPattern;
        }
        final int strPatternLength = strPattern.length();

        // 初始化定义好的长度以获得更好的性能
        StringBuilder sbuf = new StringBuilder(strPatternLength + 50);

        int handledPosition = 0;
        int delimIndex;// 占位符所在位置
        for (int argIndex = 0; argIndex < argArray.length; argIndex++) {
            delimIndex = strPattern.indexOf(EMPTY_JSON, handledPosition);
            if (delimIndex == -1) {
                if (handledPosition == 0) {
                    return strPattern;
                } else { // 字符串模板剩余部分不再包含占位符，加入剩余部分后返回结果
                    sbuf.append(strPattern, handledPosition, strPatternLength);
                    return sbuf.toString();
                }
            } else {
                if (delimIndex > 0 && strPattern.charAt(delimIndex - 1) == C_BACKSLASH) {
                    if (delimIndex > 1 && strPattern.charAt(delimIndex - 2) == C_BACKSLASH) {
                        // 转义符之前还有一个转义符，占位符依旧有效
                        sbuf.append(strPattern, handledPosition, delimIndex - 1);
                        sbuf.append(Convert.utf8Str(argArray[argIndex]));
                        handledPosition = delimIndex + 2;
                    } else {
                        // 占位符被转义
                        argIndex--;
                        sbuf.append(strPattern, handledPosition, delimIndex - 1);
                        sbuf.append(C_DELIM_START);
                        handledPosition = delimIndex + 1;
                    }
                } else {
                    // 正常占位符
                    sbuf.append(strPattern, handledPosition, delimIndex);
                    sbuf.append(Convert.utf8Str(argArray[argIndex]));
                    handledPosition = delimIndex + 2;
                }
            }
        }
        // 加入最后一个占位符后所有的字符
        sbuf.append(strPattern, handledPosition, strPattern.length());

        return sbuf.toString();
    }
}



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ServerInfo.java
package com.sq.common.domain;

import com.sq.common.domain.model.*;
import com.sq.common.domain.utils.Arith;
import com.sq.common.domain.utils.IpUtils;
import oshi.SystemInfo;
import oshi.hardware.CentralProcessor;
import oshi.hardware.CentralProcessor.TickType;
import oshi.hardware.GlobalMemory;
import oshi.hardware.HardwareAbstractionLayer;
import oshi.software.os.FileSystem;
import oshi.software.os.OSFileStore;
import oshi.software.os.OperatingSystem;
import oshi.util.Util;

import java.net.UnknownHostException;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;

/**
 * 服务器相关信息
 */
public class ServerInfo {
    private static final int OSHI_WAIT_SECOND = 1000;

    /**
     * CPU相关信息
     */
    private Cpu cpu = new Cpu();

    /**
     * 內存相关信息
     */
    private Mem mem = new Mem();

    /**
     * JVM相关信息
     */
    private Jvm jvm = new Jvm();

    /**
     * 服务器相关信息
     */
    private Sys sys = new Sys();

    /**
     * 磁盘相关信息
     */
    private List<SysFile> sysFiles = new LinkedList<SysFile>();

    public Cpu getCpu() {
        return cpu;
    }

    public void setCpu(Cpu cpu) {
        this.cpu = cpu;
    }

    public Mem getMem() {
        return mem;
    }

    public void setMem(Mem mem) {
        this.mem = mem;
    }

    public Jvm getJvm() {
        return jvm;
    }

    public void setJvm(Jvm jvm) {
        this.jvm = jvm;
    }

    public Sys getSys() {
        return sys;
    }

    public void setSys(Sys sys) {
        this.sys = sys;
    }

    public List<SysFile> getSysFiles() {
        return sysFiles;
    }

    public void setSysFiles(List<SysFile> sysFiles) {
        this.sysFiles = sysFiles;
    }

    public void copyInfo() throws Exception {
        SystemInfo si = new SystemInfo();
        HardwareAbstractionLayer hal = si.getHardware();
        setCpuInfo(hal.getProcessor());
        setMemInfo(hal.getMemory());
        setSysInfo();
        setJvmInfo();
        setSysFiles(si.getOperatingSystem());
    }

    /**
     * 设置CPU信息
     */
    private void setCpuInfo(CentralProcessor processor) {
        // CPU信息
        long[] prevTicks = processor.getSystemCpuLoadTicks();
        Util.sleep(OSHI_WAIT_SECOND);
        long[] ticks = processor.getSystemCpuLoadTicks();
        long nice = ticks[TickType.NICE.getIndex()] - prevTicks[TickType.NICE.getIndex()];
        long irq = ticks[TickType.IRQ.getIndex()] - prevTicks[TickType.IRQ.getIndex()];
        long softirq = ticks[TickType.SOFTIRQ.getIndex()] - prevTicks[TickType.SOFTIRQ.getIndex()];
        long steal = ticks[TickType.STEAL.getIndex()] - prevTicks[TickType.STEAL.getIndex()];
        long cSys = ticks[TickType.SYSTEM.getIndex()] - prevTicks[TickType.SYSTEM.getIndex()];
        long user = ticks[TickType.USER.getIndex()] - prevTicks[TickType.USER.getIndex()];
        long iowait = ticks[TickType.IOWAIT.getIndex()] - prevTicks[TickType.IOWAIT.getIndex()];
        long idle = ticks[TickType.IDLE.getIndex()] - prevTicks[TickType.IDLE.getIndex()];
        long totalCpu = user + nice + cSys + idle + iowait + irq + softirq + steal;
        cpu.setCpuNum(processor.getLogicalProcessorCount());
        cpu.setTotal(totalCpu);
        cpu.setSys(cSys);
        cpu.setUsed(user);
        cpu.setWait(iowait);
        cpu.setFree(idle);
    }

    /**
     * 设置内存信息
     */
    private void setMemInfo(GlobalMemory memory) {
        mem.setTotal(memory.getTotal());
        mem.setUsed(memory.getTotal() - memory.getAvailable());
        mem.setFree(memory.getAvailable());
    }

    /**
     * 设置服务器信息
     */
    private void setSysInfo() {
        Properties props = System.getProperties();
        sys.setComputerName(IpUtils.getHostName());
        sys.setComputerIp(IpUtils.getHostIp());
        sys.setOsName(props.getProperty("os.name"));
        sys.setOsArch(props.getProperty("os.arch"));
        sys.setUserDir(props.getProperty("user.dir"));
    }

    /**
     * 设置Java虚拟机
     */
    private void setJvmInfo() throws UnknownHostException {
        Properties props = System.getProperties();
        jvm.setTotal(Runtime.getRuntime().totalMemory());
        jvm.setMax(Runtime.getRuntime().maxMemory());
        jvm.setFree(Runtime.getRuntime().freeMemory());
        jvm.setVersion(props.getProperty("java.version"));
        jvm.setHome(props.getProperty("java.home"));
    }

    /**
     * 设置磁盘信息
     */
    private void setSysFiles(OperatingSystem os) {
        FileSystem fileSystem = os.getFileSystem();
        List<OSFileStore> fsArray = fileSystem.getFileStores();
        for (OSFileStore fs : fsArray) {
            long free = fs.getUsableSpace();
            long total = fs.getTotalSpace();
            long used = total - free;
            SysFile sysFile = new SysFile();
            sysFile.setDirName(fs.getMount());
            sysFile.setSysTypeName(fs.getType());
            sysFile.setTypeName(fs.getName());
            sysFile.setTotal(convertFileSize(total));
            sysFile.setFree(convertFileSize(free));
            sysFile.setUsed(convertFileSize(used));
            sysFile.setUsage(Arith.mul(Arith.div(used, total, 4), 100));
            sysFiles.add(sysFile);
        }
    }

    /**
     * 字节转换
     *
     * @param size 字节大小
     * @return 转换后值
     */
    public String convertFileSize(long size) {
        long kb = 1024;
        long mb = kb * 1024;
        long gb = mb * 1024;
        if (size >= gb) {
            return String.format("%.1f GB", (float) size / gb);
        } else if (size >= mb) {
            float f = (float) size / mb;
            return String.format(f > 100 ? "%.0f MB" : "%.1f MB", f);
        } else if (size >= kb) {
            float f = (float) size / kb;
            return String.format(f > 100 ? "%.0f KB" : "%.1f KB", f);
        } else {
            return String.format("%d B", size);
        }
    }
}



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