jave用流writeFromStream上传图片或者文件到linux服务器的某个文件夹下

作者：笔触狂放9 | 2024-06-14 01:05:26

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writefromstream

jave用流writeFromStream上传图片或者文件到linux服务器的某个文件夹下

前端jsp页面

下面展示一些 内联代码片。

// A code block
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html lang="en" class="no-js">
<head>
<meta charset="utf-8" />

<app:include type="css" />
<link rel="stylesheet" type="text/css" href="${CUSTOM_THEME_PATH }assets/plugins/jquery-file-upload/css/jquery.fileupload-ui.css" />
<link rel="stylesheet" type="text/css" href="${CUSTOM_THEME_PATH }assets/plugins/bootstrap-fileupload/bootstrap-fileupload.css" />
<style type="text/css">
</style>
</head>
<body class="">
	<div class="container-fluid">

		<div class="">

			<div class="row">
				<div class="col-md-12">
					<form class="form-inline form-table" role="form" id="submit-form" action="${CONTEXT_PATH}supplier/files/upload" method="post">
						<input type="hidden" value="${domain.supplierFile.businessId }" name="businessId">
						<input type="hidden" value="${domain.supplierFile.businessType }" name="businessType">
						<div class="form-body">

							<table class="table table-bordered table-condensed">
								<colgroup>
									<col width="25%" />
								</colgroup>
								<tbody>
									<tr>
										<td class="form-label">
											<label class="control-label">
												 上传文件
												<span class="required">*</span>
											</label>
										</td>

										<td>
											<input type="file" name="attachFiles" class="pull-left" filetype="file" required="true" paidfilename="true" />
										</td>
									</tr>
								</tbody>
							</table>
						</div>
					</form>
				</div>
			</div>
		</div>
	</div>


	<app:include type="javascript" />
	<script type="text/javascript" src="${CUSTOM_THEME_PATH }assets/plugins/bootstrap-fileupload/bootstrap-fileupload.js"></script>
	
	<script type="text/javascript">
        jQuery(document).ready(function() {
                //上传附件
            $('#fileupload-attach').fileupload({
                  dataType : 'json',
                  pasteZone : null,
                  autoUpload : true,
                  url : "${CONTEXT_PATH}supplier/invoicings/upload",
                  maxNumberOfFiles : 5,
                  maxFileSize : 58 * 1024 * 1024, // 60m
                  acceptFileTypes : /(\.|\/)(mp4|txt|xlsx?|docx?|inf|gif|jpe?g|png|pdf?)$/i,
                  downloadTemplateId : "template-download-attach"
            });
                
        });

    </script>
</body>
</html>;
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前端简单页面弹框效果
在这里插入图片描述

后端简单实现

// An highlighted block
    @RequestMapping(value = "to/upload", method = { RequestMethod.GET })
    public String toUpload(@ModelAttribute("domain") SupplierFileDo domain, 		@RequestParam("businessId") Integer businessId, @RequestParam("businessType") String businessType)
    {
        SupplierFile supplierFile = new SupplierFile();
        supplierFile.setBusinessId(businessId);
        supplierFile.setBusinessType(businessType);
        domain.setSupplierFile(supplierFile);

        return "supplier/supplier_file_upload";
    }

    @RequestMapping(value = "upload", method = { RequestMethod.POST })
    @ResponseBody
    public ResponseJson uploadAttachmnet(@RequestParam("businessId") Integer businessId, @RequestParam("businessType") String businessType,
            @RequestParam("attachFiles") MultipartFile multiPartFile)
    {
        ResponseJson responseJson = new ResponseJson();
        if (multiPartFile != null && multiPartFile.getSize() > 0)
        {
            // 获取原文件名
            String filename = multiPartFile.getOriginalFilename();
            String newfilename = CommonUtils.newFileNameByTime(filename);
            String uploadPath = "/home/upload_file/";
            if (StringUtils.isBlank(uploadPath))
            {
                responseJson.setStatus(StatusCode.FAIL);
                responseJson.setMessage("系统异常，请稍后。");
                return responseJson;
            }

            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
            String format = dateFormat.format(new Date());
            String filePath = format + "/" + newfilename;

            try
            {
                FileUtil.writeFromStream(multiPartFile.getInputStream(), uploadPath + filePath);
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }

            SupplierFile supplierFile = new SupplierFile();
            supplierFile.setBusinessId(businessId);
            supplierFile.setBusinessType(businessType);
            supplierFile.setFileName(newfilename);
            supplierFile.setFilePath(filePath);
            supplierFileService.createSupplierFile(supplierFile);
        }
        return responseJson;
    }

    @RequestMapping(value = "to/download", method = { RequestMethod.POST })
    public String toDownload(@ModelAttribute("domain") SupplierFileDo domain, @RequestParam("businessId") Integer businessId, @RequestParam("businessType") String businessType)
    {
        List<SupplierFile> supplierFiles = supplierFileService.querySupplierFileList(businessId, businessType);
        domain.setSupplierFiles(supplierFiles);
        return "supplier/supplier_file_list";
    }

    @RequestMapping(value = "download", method = { RequestMethod.GET })
    public void download(@RequestParam("id") Integer id, HttpServletRequest request, HttpServletResponse response)
    {
        SupplierFile supplierFile = supplierFileService.getSupplierFile(id);

        // 解决文件名乱码或不显示
        String newfilename = supplierFile.getFileName();
        try
        {
            newfilename = new String(supplierFile.getFileName().getBytes(StandardCharsets.UTF_8), "iso8859-1");
        }
        catch (UnsupportedEncodingException e)
        {
            e.printStackTrace();
        }

        response.setHeader("Content-Disposition", "attachment;filename=\"" + (newfilename) + "\"");
        OutputStream output = null;
        BufferedInputStream inputStream = null;
        try
        {
            output = response.getOutputStream();
            String uploadPath = "/home/upload_file/";
            inputStream = FileUtil.getInputStream(uploadPath + supplierFile.getFilePath());
            IOUtils.copy(inputStream, output);
        }
        catch (IOException e)
        {
            throw new RuntimeException(e);
        }
        finally
        {
            IOUtils.closeQuietly(inputStream);
            IOUtils.closeQuietly(output);
        }
    }

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上传文件要没有FTP服务器，就用流，然后设计一个表，点击下载跳转到当前上传过的记录，在用IO下载下来，
CREATE TABLE t_supplier_file (
id int(11) NOT NULL AUTO_INCREMENT COMMENT ‘主键’,
business_id int(11) DEFAULT NULL COMMENT ‘标识’,
business_type varchar(32) DEFAULT NULL COMMENT ‘业务类型’,
file_name varchar(255) DEFAULT NULL COMMENT ‘文件名称’,
file_path varchar(255) DEFAULT NULL COMMENT ‘文件路径’,
create_time datetime DEFAULT NULL COMMENT ‘创建时间’,
PRIMARY KEY (id)
) ENGINE=InnoDB CHARSET=utf8mb4 COMMENT=‘文件表’;

简单的上传以及下载，从前端到后端，各位在创建那个文件路径的时候，放到部署项目的外面的文件夹，记清楚，有dockker环境下的，在创建目录后，上传有时候不好找文件，不要跳坑。一般都有ftp 服务器，这个只是临时的项目存放路径，这个针对带宽也有一定的要求！

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