Java实现连接redis几种方式_java 连接redis

第一种方法：使用RedisTemplate实现

1、导入jar包

<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-redis</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.70</version>
		</dependency>

2、编写配置类

spring:
  redis:
    password: 123456

3、创建实体类

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
 
    private Integer id;
    private String  name;
    @JSONField(format = "yyyy-MM-dd HH:mm:ss")
    private LocalDateTime localDateTime;
}

4、编写测试类

 private RedisTemplate redisTemplate;
 
    @Resource
    public void setRedisTemplate(RedisTemplate redisTemplate) {
        redisTemplate.setKeySerializer(RedisSerializer.string());
        redisTemplate.setValueSerializer(new GenericFastJsonRedisSerializer());
        this.redisTemplate = redisTemplate;
    }
 
 
    @Test
    void setredis() {
        User user = new User(1001,"张无忌", LocalDateTime.now());
        BoundValueOperations ops = redisTemplate.boundValueOps("stu:user:1001");
        ops.set(user);
        System.out.println("保存成功");
    }
 
    @Test
    void getredis(){
        BoundValueOperations ops = redisTemplate.boundValueOps("stu:user:1001");
        Object o = ops.get();
        System.out.println("ops = " + o);
    }

5、先运行setredis 再运行getredis

 第二种方法：使用Jedis实现

1、导入jar包

<dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>4.2.0</version>
        </dependency>
        <!--单元测试-->
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter</artifactId>
            <version>5.7.1</version>
            <scope>test</scope>
        </dependency>

2、在测试中    实现五种类型 添加到redis中

private Jedis jedis;
 
    @BeforeEach
    void setredis() {
        //1.建立连接
        jedis = new Jedis("127.0.0.1", 6379);
        //2.设置密码
        jedis.auth("123456");
        //3.选择数据库
        jedis.select(1);
    }
 
    //测试string
    @Test
    void teststring() {
        //存入数据
        jedis.set("name", "小花");
        String name = jedis.get("name");
        System.out.println("name = " + name);
    }
 
    //测试hash
    @Test
    void testhash() {
        //再user:1中插入name和age的数据
        jedis.hset("user:1", "name", "张三");
        jedis.hset("user:1", "age", "20");
        //获取hash中的值
        Map<String, String> stringStringMap = jedis.hgetAll("user:1");
        System.out.println("stringStringMap = " + stringStringMap);
    }
 
    //测试list
    @Test
    void testlist() {
        jedis.lpush("stu", "张二", "张三");
        jedis.rpush("stu", "张五", "张六");
        List<String> stu = jedis.lrange("stu", 0, 7);
        for (String s : stu) {
            System.out.println("s = " + s);
        }
    }
 
    //测试set
    @Test
    void testset() {
        jedis.sadd("demo", "a", "b", "c", "张三");
        long srem = jedis.srem("demo", "张三");
        System.out.println("srem = " + srem);
        long demo1 = jedis.scard("demo");
        System.out.println("demo1 = " + demo1);
        boolean sismember = jedis.sismember("demo", "张三");
        System.out.println("sismember = " + sismember);
        Set<String> demo = jedis.smembers("demo");
        System.out.println(demo);
    }
 
    //测试sortedset
    @Test
    void testsored() {
        jedis.zadd("student",98,"张一");
        long student = jedis.zcard("student");
        System.out.println("student = " + student);
    }
 
    @AfterEach
    public void tearDown() {
        if (jedis != null) {
            jedis.close();
        }
    }

 3、运行结果

第三种方式：JedisPool实现，Jedis本身是线程不安全的，并且频繁的创建和销毁连接会有性能，在多线程下使⽤同⼀个Jedis对象会出现并发问题。也为了避免每次使⽤Jedis对象时都需要重新构建，Jedis提供了JedisPool。JedisPool是基于Commons Pool 2实现的⼀个线程安全的连接池

 1、引入依赖：

<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>4.2.0</version>
</dependency>
<!--单元测试-->
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>5.7.1</version>
<scope>test</scope>
</dependency>

2、创建config问价 ，创建一个JedisConnectionFactory 类。

public class JedisConnectionFactory {
    private static final JedisPool jedisPool;
    static {
        JedisPoolConfig poolConfig = new JedisPoolConfig();//配置连接池
        poolConfig.setMaxTotal(8);// 最大连接•
        poolConfig.setMaxIdle(8);// 最大空闲连接
        poolConfig.setMinIdle(0);// 最小空闲连接
        poolConfig.setMaxWaitMillis(200); // 设置最长等待时间， ms
        jedisPool = new JedisPool(poolConfig,"127.0.0.1",6379,1000,"123456"); //创建连接池对象
    }
    public static Jedis getJedis(){ //获取Jedis对象
        return jedisPool.getResource();
    }
 
}

3、在测试中调用JedisConnectionFactory 来连接redis来实现五种连接方式

private Jedis jedis;
 
    @BeforeEach
    void setredis() {
        //1.建立连接
          jedis= JedisConnectionFactory.getJedis();
        //2.设置密码
        jedis.auth("123456");
        //3.选择数据库
        jedis.select(1);
    }
 
    //测试string
    @Test
    void teststring() {
        //存入数据
        jedis.set("name", "小花");
        String name = jedis.get("name");
        System.out.println("name = " + name);
    }
 
    //测试hash
    @Test
    void testhash() {
        //再user:1中插入name和age的数据
        jedis.hset("user:1", "name", "张三");
        jedis.hset("user:1", "age", "20");
        //获取hash中的值
        Map<String, String> stringStringMap = jedis.hgetAll("user:1");
        System.out.println("stringStringMap = " + stringStringMap);
    }
 
    //测试list
    @Test
    void testlist() {
        jedis.lpush("stu", "张二", "张三");
        jedis.rpush("stu", "张五", "张六");
        List<String> stu = jedis.lrange("stu", 0, 7);
        for (String s : stu) {
            System.out.println("s = " + s);
        }
    }
 
    //测试set
    @Test
    void testset() {
        jedis.sadd("demo", "a", "b", "c", "张三");
        long srem = jedis.srem("demo", "张三");
        System.out.println("srem = " + srem);
        long demo1 = jedis.scard("demo");
        System.out.println("demo1 = " + demo1);
        boolean sismember = jedis.sismember("demo", "张三");
        System.out.println("sismember = " + sismember);
        Set<String> demo = jedis.smembers("demo");
        System.out.println(demo);
    }
 
    //测试sortedset
    @Test
    void testsored() {
        jedis.zadd("student",98,"张一");
        long student = jedis.zcard("student");
        System.out.println("student = " + student);
    }
 
    @AfterEach
    public void tearDown() {
        if (jedis != null) {
            jedis.close();
        }
    }