首先我们导入pom依赖
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
我们在springmvc-servlet.xml里面添加一段处理多功能表单的视图解析器
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 必须和用户JSP 的pageEncoding属性一致，以便正确解析表单的内容 --> <property name="defaultEncoding" value="UTF-8"></property> <!-- 文件最大大小(字节) 1024*1024*50=50M--> <property name="maxUploadSize" value="52428800"></property> <!--resolveLazily属性启用是为了推迟文件解析，以便捕获文件大小异常--> <property name="resolveLazily" value="true"/> </bean>
建一个jsp页面（file.jsp）
<%-- Created by IntelliJ IDEA. User: Administrator Date: 2019/10/31 0031 Time: 19:51 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>讲解springmvc文件上传页面</title> </head> <body> <form action="/book/upload" method="post" enctype="multipart/form-data"> 请选择要上传的文件<input type="file" name="xxx"> <input type="submit" value="ok"> </form> </body> </html>
BookController
/**
* 文件上传
* @param req
* @return
*/
@RequestMapping("/upload")
public String upload(HttpServletRequest req, MultipartFile xxx){
String fileName=xxx.getOriginalFilename();
String contentType=xxx.getContentType();
try {
FileUtils.copyInputStreamToFile(xxx.getInputStream(),new File("E:/uplods/"+fileName));
} catch (IOException e) {
e.printStackTrace();
}
return "redirect:/book/list";
}
文件成功上传
原文：https://www.cnblogs.com/xmf3628/p/11773510.html