Spring MVC框架：第九章：文件上传

第七章 文件上传
1.表单

2.jar包

commons-fileupload-1.3.jar和commons-io-2.0.1.jar
3.配置CommonsMultipartResolver

注意：id必须是multipartResolver
4.接收数据

①普通数据：和以前一样正常接收 ②文件数据：使用@RequestParam注解注入到MultipartFile类型的入参中

@RequestMapping("/upload")
public String upload(@RequestParam(“picture”) MultipartFile picture) {
return “…”;
}

③MultiPartFile类型
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实战案例：
结构图
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web.xml

<?xml version="1.0" encoding="UTF-8"?> springDispatcherServlet org.springframework.web.servlet.DispatcherServlet contextConfigLocation classpath:spring-mvc.xml 1 
<!-- Map all requests to the DispatcherServlet for handling -->
<servlet-mapping>
	<servlet-name>springDispatcherServlet</servlet-name>
	<url-pattern>/</url-pattern>
</servlet-mapping>

spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>


<context:component-scan base-package=“com.handlers”/>

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
	<property name="prefix" value="/WEB-INF/page/"/>
	<property name="suffix" value=".jsp"/>
</bean>

<mvc:annotation-driven/>
<mvc:default-servlet-handler/>

<!-- 配置multipart/form-data类型数据的解析器bean -->
<!-- bean的id必须是：multipartResolver -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
	<property name="defaultEncoding" value="UTF-8"/>
</bean>

index.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>Insert title here</title>
	</head>
	<body>
		<form action="${pageContext.request.contextPath }/upload" method="post" enctype="multipart/form-data">
				你看我的新头像牛逼吗？
				<input type="file" name="picture" /><br/>
				<input type="submit" value="上传"/>
		</form>
	</body>
</html>

target.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>Insert title here</title>
</head>
<body>
<h1>Target</h1>
	<img src="${pageContext.request.contextPath }/myUpload/${requestScope.pictureName}"/>
</body>
</html>

UploadHandled.java

package com.handlers;

import java.io.File;
import javax.servlet.ServletContext;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.multipart.MultipartFile;

@Controller
public class UploadHandled {

@Autowired
private ServletContext servletContext;

@RequestMapping("/upload")
public String updoal(@RequestParam("picture") MultipartFile picture,Model model ) throws Exception, Exception {
		System.out.println(picture.getContentType());
		String originalFilename = picture.getOriginalFilename();
		String realPath = servletContext.getRealPath("/myUpload");
		picture.transferTo(new File(realPath+"/"+originalFilename));
		model.addAttribute("pictureName", originalFilename);
	return "target";
}

}