springMVC文件上传

1. 引入Jar包

commons-fileupload-1.2.2.jar

commons-io-2.1.jar

2.user-servlet.xml中配置文件上传

<!-- 配置文件上传 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
	<property name="maxUploadSize" value="5000000"></property>
</bean>

3. UserController.java

@Controller
@RequestMapping("/user")
public class UserController {
	// 使用map模拟数据库 
	private Map<String, User> userMap = new HashMap<String, User>();

	public UserController() {
		userMap.put("zhangsan", new User("zhangsan", "123"));
		userMap.put("lishimin", new User("lishimin", "456"));
	}
	
	// 文件上传
	// 訪问方法: http://localhost/springmvc_user/upload.jsp
	@RequestMapping(value="/upload",method=RequestMethod.POST)
	public String upload(@RequestParam("attachs")MultipartFile[] attachs,HttpServletRequest req) throws IOException {
		String realpath = req.getSession().getServletContext().getRealPath("/resources/upload");
		System.out.println(realpath);
		for(MultipartFile attach:attachs) {
			if(attach.isEmpty()){
				continue;
			}
			File file = new File(realpath + "/" + attach.getOriginalFilename()); 
			FileUtils.copyInputStreamToFile(attach.getInputStream(),file);
		}
		return "success";
	}
	
}

4. upload.jsp

<%@ 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>文件上传</title>
</head>
<body>
<form method="post" action="user/upload" enctype="multipart/form-data">
	Attach:<br/>
    <input type="file" name="attachs"/><br/>	
    <input type="file" name="attachs"/><br/>	
    <input type="file" name="attachs"/><br/>	
    <input type="submit" value="上传文件"/>
</form>
</body>
</html>