SpringMVC文件上传

一.配置web.xml

关键是指定spring-servlet.xml配置文件的位置

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">  
  
   <servlet>
    <servlet-name>spring</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
     <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-servlet.xml</param-value> 
    </init-param>
    <!-- 可以自定义servlet.xml配置文件的位置和名称，默认为WEB-INF目录下，名称为[<servlet-name>]-servlet.xml，如spring-servlet.xml
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring-servlet.xml</param-value>  默认
    </init-param>
    -->
    <load-on-startup>1</load-on-startup>
</servlet>
 
<servlet-mapping>
    <servlet-name>spring</servlet-name>
    <url-pattern>*.do</url-pattern>
</servlet-mapping>

</web-app>

二.spring-servlet.xml配置

<?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"  
    xmlns:mvc="http://www.springframework.org/schema/mvc"  
   xsi:schemaLocation="  
       http://www.springframework.org/schema/beans   
       http://www.springframework.org/schema/beans/spring-beans-3.2.xsd  
       http://www.springframework.org/schema/context   
        http://www.springframework.org/schema/context/spring-context-3.2.xsd  
        http://www.springframework.org/schema/mvc      
        http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">  
     <!-- 启用spring mvc 注解 -->
    <context:annotation-config />
 
    <!-- 设置使用注解的类所在的jar包 -->
    <context:component-scan base-package="me.mvc,me.base"></context:component-scan>
 
    <!-- 完成请求和注解POJO的映射 -->
  <!--   <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" /> -->
 
    <!-- 对转向页面的路径解析。prefix：前缀， suffix：后缀 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/jsp/" p:suffix=".jsp" />
     <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
  <property name="messageConverters">
   <list>
    <bean
     class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
     <property name="supportedMediaTypes">
      <list>
       <!--返回字符串格式json-->
       <value>application/json;charset=UTF-8</value>
      </list>
     </property>
    </bean>
   </list>
  </property>
 </bean>
     <!-- 上传文件的关键配置 -->
 <bean id="multipartResolver"  class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize" value="102400000"></property>
</bean>
</beans>  

三.后台代码(代码中有方法作用的注释)

package me.mvc;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import me.mvc.service.testmvcDao;
import net.sf.json.JSONArray;

import org.apache.struts2.ServletActionContext;
import org.springframework.http.HttpRequest;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("/mvc/*")
public class testmvc {

    @RequestMapping(value="/uploadindex.do",method=RequestMethod.GET)//上传文件的首页
    public String uploadindex() throws Exception{
        
        
         return "testupload";
    }
    
    @RequestMapping(value="/upload.do",method=RequestMethod.POST)//上传文件的关键代码
    public String upload(HttpServletRequest req) throws Exception{
        MultipartHttpServletRequest mreq = (MultipartHttpServletRequest)req;
        MultipartFile file = mreq.getFile("file");
        String fileName = file.getOriginalFilename();
        
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");  
       String s= req.getSession().getServletContext().getRealPath("upload");
       //&&&&&&&&&&&&&&&:D:apache-tomcat-7.0.27webappsSpringMvcWebRootupload/
       System.out.println("&&&&&&&&&&&&&&&:"+s);
       File targetFile = new File(s, sdf.format(new Date())+fileName.substring(fileName.lastIndexOf('.')));  
       if(!targetFile.exists()){  
           targetFile.mkdirs();  
       }  
 
       //保存  
       try {  
           file.transferTo(targetFile);  
       } catch (Exception e) {  
           e.printStackTrace();  
       }  
       //model.addAttribute("fileUrl", request.getContextPath()+"/upload/"+fileName); 
       // FileOutputStream fos = new FileOutputStream(req.getSession().getServletContext().getRealPath("upload")+
            //    sdf.format(new Date())+fileName.substring(fileName.lastIndexOf('.')));
        //FileOutputStream out = new FileOutputStream(path+"\"+fileName+type);
    
        //fos.write(file.getBytes());
      // fos.flush();
        //fos.close();
       req.setAttribute("messagex", "上传成功");
        return "upload";
    }
/*    @RequestMapping(method=RequestMethod.GET,value="/hello2")
      public ModelAndView hello2() {   
          ModelAndView view = new ModelAndView("hello2");          
            return view;
}*/
}

四.前端页面

页面有两个部分组成

upload.jsp是上传文件的页面,由于上传文件的页面是跟主页面是配套使用的,所以就有了testupload.jsp这个主页面

1.testupload.jsp的代码,通过ifame嵌套upload.jsp页面

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'gdgl.jsp' starting page</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->

  </head>
  
  <body>
  <table>
      <tr>
                    <td>工单管理：</td>
                    <td >
                <!--     <input id="bk_img" type="hidden" class="easyui-textbox" name="bk_img"  /> -->
                    <%--   嵌套upload.jsp页面 --%>
                    <iframe id="tt" name="tt1" src="<%=path%>/jsp/upload.jsp"  frameBorder="0" frameSpacing="0" height="25" width="600" marginHeight="0" marginWidth="0" scrolling="no" ></iframe>
                    </td>
                </tr>
                </table>
  </body>
</html>

2.upload.jsp代码

 <%=request.getAttribute("messagex")==null?"":request.getAttribute("messagex").toString()%>,返回上传成功后的信息

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
response.setHeader("P3P" , "CP="CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR"" );
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>文件上传</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<link rel="stylesheet" href="<%=path%>/resource/themes/icon.css"
    type="text/css" />
<link rel="stylesheet"
    href="<%=path%>/resource/themes/default/easyui.css" type="text/css" />
<script type="text/javascript" src="<%=path%>/resource/js/jquery.min.js"></script>
<script type="text/javascript"
    src="<%=path%>/resource/js/jquery.easyui.min.js"></script>
</head>

<body>
    <!-- ${pageContext.request.contextPath}/upload/execute_upload.do -->
    <!-- ${pageContext.request.contextPath}/upload2/upload2.do -->
    <table>
    <td>
    <form action="<%=path%>/mvc/upload.do" onsubmit="return check()" enctype="multipart/form-data"
        method="post">
          <input type="file" id="curr_sel_image"  name="file" style="float: left;  170px;" > <input type="submit" style="float: left;padding-left: 0px;" value="上传" />
          
    </form>
    </td>


    <td>
    <%=request.getAttribute("messagex")==null?"":request.getAttribute("messagex").toString()%>
    </td>
   </table>
<!--     <br />
    <s:fielderror /> -->
</body>
<script type="text/javascript">
function check(){
   var str=document.getElementById("curr_sel_image").value;
   if(str.length==0)
   {
      alert("请选择上传的文件!");
      return false;
   }
   return true;
}
</script>
</html>

五.页面效果

1.上传前

2.上传后