SpringMVC实现多文件上传

客户端三要素

1. 设置提交方式为post: method=“post”
2. enctype=“multipart/form-data”
3. type=“file”

maven坐标

<dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.2.2</version>
    </dependency>
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>

spring-mvc.xml配置

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="512000"></property>
        <property name="maxInMemorySize" value="1024"></property>
        <property name="defaultEncoding" value="UTF-8"></property>
    </bean>


```java
在这里插入代码片

前端jsp代码

<form action="${pageContext.request.contextPath}/user/save16" method="post" enctype="multipart/form-data">
    名称：<input type="text" name="username"><br>
    文件：<input type="file" name="uploadFile"><br>
    文件：<input type="file" name="uploadFile"><br>
    文件：<input type="file" name="uploadFile"><br>
    文件：<input type="file" name="uploadFile"><br>
    <input type="submit" value="提交"><br>
</form>

Controller

@RequestMapping("/save16")
    @ResponseBody   //Spring MVC获取请求头
    public void save16(String username, MultipartFile[] uploadFile) throws IOException {
    
    
        System.out.println(username);
        //获得上传文件的名称
        for (MultipartFile multipartFile : uploadFile) {
    
    
            String originalFilename = multipartFile.getOriginalFilename();
            multipartFile.transferTo(new File("C:\\upload\\"+originalFilename));
        }
    }