SpringMVC之文件上传_spring mvc 上传文件-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_43795112/article/details/106522612

文件上传示例:

1.添加jar包:

commons-fileupload-1.2.1.jar
commons-io-2.0.jar

2. 在springMVC.xml配置文件上传解析器:

<!-- 配置文件上传解析器
id必须是"multipartResolver",否则，会报错误：
java.lang.IllegalArgumentException: Expected MultipartHttpServletRequest: is a MultipartResolver configured?
 -->
<bean id="multipartResolver"
 class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="UTF-8"></property>
<!-- 限制最大上传文件的大小-->
<property name="maxUploadSize" value="1024000"></property>
</bean>

3.上传页面:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="testUpload" method="post" enctype="multipart/form-data">
文件: <input type="file" name="file"/><br><br>
描述: <input type="text" name="desc"/><br><br>
<input type="submit" value="提交"/>
</form>
</body>
</html>

4.controller层方法：

@Controller
public class UploadHandler {
 
@RequestMapping(value="/testUpload",method=RequestMethod.POST)
public String testUpload(@RequestParam(value="desc",required=false) String desc, @RequestParam("file") MultipartFile multipartFile) throws IOException{                
System.out.println("desc : "+desc);
System.out.println("OriginalFilename : "+multipartFile.getOriginalFilename());
InputStream inputStream = multipartFile.getInputStream();
System.out.println("inputStream.available() : "+inputStream.available());
System.out.println("inputStream : "+inputStream);

return "success"; //增加成功页面: /views/success.jsp
}
}