spring mvc(注解)上传文件的简单例子 （转-收藏）

 spring mvc(注解)上传文件的简单例子,这有几个需要注意的地方
1.form的enctype=”multipart/form-data” 这个是上传文件必须的
2.applicationContext.xml中 <bean id=”multipartResolver” class=”org.springframework.web.multipart.commons.CommonsMultipartResolver”/> 关于文件上传的配置不能少

大家可以看具体代码如下:

web.xml

<?xml version="1.0" encoding="UTF-8"?>  
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">  
  <display-name>webtest</display-name>  
  
  <listener>  
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
    </listener>  
    <context-param>  
        <param-name>contextConfigLocation</param-name>  
        <param-value>  
            /WEB-INF/config/applicationContext.xml  
            /WEB-INF/config/codeifAction.xml  
        </param-value>  
    </context-param>  
  
    <servlet>  
        <servlet-name>dispatcherServlet</servlet-name>  
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
        <init-param>  
            <param-name>contextConfigLocation</param-name>  
            <param-value>/WEB-INF/config/codeifAction.xml</param-value>  
        </init-param>  
        <load-on-startup>1</load-on-startup>  
    </servlet>  
    <!-- 拦截所有以do结尾的请求 -->  
    <servlet-mapping>  
        <servlet-name>dispatcherServlet</servlet-name>  
        <url-pattern>*.do</url-pattern>  
    </servlet-mapping>  
  
  <welcome-file-list>  
    <welcome-file>index.do</welcome-file>  
  </welcome-file-list>  
</web-app> 

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>  
<beans xmlns="http://www.springframework.org/schema/beans"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"  
    xmlns:context="http://www.springframework.org/schema/context"  
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"  
    default-lazy-init="true">  
  
    <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->  
    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" lazy-init="false" />  
  
    <!-- 另外最好还要加入DefaultAnnotationHandlerMapping，不然会被 XML或其它的映射覆盖！ -->  
    <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />  
  
    <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->  
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />  
  
    <!-- 支持上传文件 -->  
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>  
  
</beans>

　　UploadAction.java

package com.codeif.action;  
  
import java.io.File;  
import java.util.Date;  
import javax.servlet.http.HttpServletRequest;  
import org.springframework.stereotype.Controller;  
import org.springframework.ui.ModelMap;  
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.RequestParam;  
import org.springframework.web.multipart.MultipartFile;  
  
@Controller  
public class UploadAction {  
    @RequestMapping(value = "/upload.do")  
    public String upload(@RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request, ModelMap model) {  
        System.out.println("开始");  
        String path = request.getSession().getServletContext().getRealPath("upload");  
        String fileName = file.getOriginalFilename();  
//        String fileName = new Date().getTime()+".jpg";  
        System.out.println(path);  
        File targetFile = new File(path, fileName);  
        if(!targetFile.exists()){  
            targetFile.mkdirs();  
        }  
        //保存  
        try {  
            file.transferTo(targetFile);  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        model.addAttribute("fileUrl", request.getContextPath()+"/upload/"+fileName);  
        return "result";  
    }  
} 

index.jsp

<%@ page pageEncoding="utf-8"%>  
<!DOCTYPE html>  
<html>  
<head>  
<meta charset="utf-8">  
<title>上传图片</title>  
</head>  
<body>  
<form action="upload.do" method="post" enctype="multipart/form-data">  
<input type="file" name="file" /> <input type="submit" value="提交" /></form>  
</body>  
</html> 

WEB-INF/jsp/下的result.jsp

<%@ page pageEncoding="utf-8"%>  
<!DOCTYPE html>  
<html>  
<head>  
<meta charset="utf-8">  
<title>上传结果</title>  
</head>  
<body>  
<img alt="" src="${fileUrl }" />  
</body>  
</html>