springmvc 文件上传

最新推荐文章于 2025-06-19 20:58:13 发布

原创最新推荐文章于 2025-06-19 20:58:13 发布 · 114 阅读

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#springmvc #upload

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本文详细介绍了三种SpringMVC文件上传方法：传统方式、SpringMVC内置方式及跨服务器上传。涵盖从依赖配置到具体实现步骤，帮助读者掌握不同场景下的文件上传技巧。

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springmvc 文件上传

pox.xml
引入坐标依赖

	<dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.3.1</version>
    </dependency>
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>

1. 传统方式上传

 public String fileUpload1(HttpServletRequest request) throws Exception {
        //使用fileupload组件完成文件上传
        //上传位置
        String path = request.getSession().getServletContext().getRealPath("/uploads/");
        System.out.println(path);
        //判断该路劲是否存在
        File file = new File(path);
        if (!file.exists()) {
            //创建文件夹
            file.mkdirs();
        }
       //解析request获取上传项
        DiskFileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);
        //解析request
        List<FileItem> fileItems = upload.parseRequest(request);
        //遍历
        for (FileItem fileItem : fileItems) {
            //判断当前 item是否为上传文件项
            if (fileItem.isFormField()){
                //普通表单项
                System.out.println("普通表单");
            }else{
                System.out.println("上传文件项");
                //上传文件项
                String fileName = fileItem.getName();
                String uuid = UUID.randomUUID().toString().replace("-", "");
                fileName = uuid+fileName;
                System.out.println(fileName);
                fileItem.write(new File(path,fileName));
                //清理临时文件
                fileItem.delete();
            }
        }

        return "success";
    }

2. springmvc 上传

MultipartFile 的变量名要和前端name相同

 public String testFileUpload2(HttpServletRequest request, MultipartFile upload) throws IOException {
        System.out.println("springmvc上传.....");
        //上传位置
        String path = request.getSession().getServletContext().getRealPath("/uploads/");
        System.out.println(path);
        //判断文件夹是否存在
        File file = new File(path);
        if (!file.exists()){
            //创建文件夹
            file.mkdirs();
        }

        //获取名称
        String filename = upload.getOriginalFilename();
        String uuid = UUID.randomUUID().toString().replace("-", "");
        filename = uuid + filename;

        //上传文件
        upload.transferTo(new File(path,filename));

        return "success";
    }

xml

   <!--id只能叫mutiparResolver-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="323232"></property>
    </bean>

3.跨服务器上传文件

    @RequestMapping("/fileupload3")
    public String testFileUpload(MultipartFile upload) throws Exception {
        System.out.println("跨服务器springmvc上传.....");
        //图片服务器路径
        String path = "http://localhost:9090/UploadFile_war/uploads/";
        //获取上传文件的名称
        String filename = upload.getOriginalFilename();
        String uuid = UUID.randomUUID().toString().replace("-", "");
        filename = uuid+filename;
        //创建客户端
        Client client = Client.create();
        //和图片服务器建立连接
        WebResource webResource = client.resource(path+filename);
        //上传文件
        webResource.put(upload.getBytes());

        return "success";
    }

如果出现405报错, 可能是另一个tomcat服务器没开文件接收
加上这个即可

    <init-param>
        <param-name>readonly</param-name>
        <param-value>false</param-value>
    </init-param>