Struts2实现图片上传功能

原文地址为： Struts2实现图片上传功能

项目整体目录结构

1、搭建Struts2框架

（1）导入Struts2相关jar包

（2）配置web.xml文件

 1 xml version="1.0" encoding="UTF-8"?>
 2 <web-app version="2.5" 
 3     xmlns="http://java.sun.com/xml/ns/javaee" 
 4     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 5     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
 6     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
 7     
 8     <filter>
 9         <filter-name>struts2filter-name>
10         <filter-class>
11             org.apache.struts2.dispatcher.FilterDispatcher
12         filter-class>
13     filter>
14 
15     <filter-mapping>
16         <filter-name>struts2filter-name>
17         <url-pattern>/*url-pattern>
18     filter-mapping>
19   <welcome-file-list>
20     <welcome-file>index.jspwelcome-file>
21   welcome-file-list>
22 web-app>

（3）配置struts.xml文件

 1 xml version="1.0" encoding="UTF-8" ?>
 2 DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 4     "http://struts.apache.org/dtds/struts-2.0.dtd">
 5 
 6 <struts>
 7 
 8     <constant name="struts.custom.i18n.resources" value="message" /> 
 9     
10     <constant name="struts.i18n.encoding" value="gbk">constant>
11     
12     
13     <constant name="struts.multipart.saveDir" value="c:\">constant>
14     
15     <package name="struts2" extends="struts-default">
16     
17         <action name="upload"
18             class="com.broadengate.struts.UploadAction">
19             <result name="success">/uploadResult.jspresult>
20             <result name="input">/index.jspresult>
21             
22             <interceptor-ref name="fileUpload">
23                 
24                 <param name="maximumSize">409600param>
25                 
30             interceptor-ref>
31             
32             <interceptor-ref name="defaultStack">interceptor-ref>
33         action>
34         
35     package>
36 
37 struts>

2、index.jsp上传功能页面代码

要注意第6行，引入了struts2的tags的uri，否则tomcat不认识标签

 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%
 3 String path = request.getContextPath();
 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 5 %>
 6 <%@ taglib prefix="s" uri="/struts-tags"%>
 7 
 8 
 9   
10     
11     
12     
13     
14     
15         
16     
17     
18     
21   
22   
23   
24 
25         
26             
27
28
29
30
31
32
33
34
35
36
37
41
42
43
44
45
46
                 
                     
username
                     
                 
                 
                     
password
                     
                 
                 
                     
file
                     

38                         
39                         
40                     
                 
                 
                     
                     
                 
             
47         
48   
49 
75 

3、UploadAction.java，在struts.xml中配置的用于响应index.jsp页面中form的action属性的对应类

  1 package com.broadengate.struts;
  2 
  3 import java.io.File;
  4 import java.io.FileInputStream;
  5 import java.io.FileOutputStream;
  6 import java.io.InputStream;
  7 import java.io.OutputStream;
  8 import java.util.ArrayList;
  9 import java.util.List;
 10 
 11 import org.apache.struts2.ServletActionContext;
 12 
 13 import com.opensymphony.xwork2.ActionSupport;
 14 
 15 public class UploadAction extends ActionSupport {
 16     private String username;
 17 
 18     private String password;
 19 
 20     private List file;
 21 
 22     private List fileFileName;
 23 
 24     private List fileContentType;
 25 
 26     private List dataUrl;
 27     
 28 
 29     @Override
 30     public String execute() throws Exception {
 31         dataUrl = new ArrayList();
 32         // �ļ����·��
 33         String imgpath = "upload/";
 34         for (int i = 0; i < file.size(); ++i) {
 35             InputStream is = new FileInputStream(file.get(i));
 36 
 37             String path = ServletActionContext.getServletContext().getRealPath("/");
 38             System.out.println(path);
 39         //    String root = "D:\\";
 40 
 41             dataUrl.add(imgpath+this.getFileFileName().get(i));
 42             File destFile = new File(path+imgpath, this.getFileFileName().get(i));
 43 
 44             OutputStream os = new FileOutputStream(destFile);
 45 
 46             byte[] buffer = new byte[400];
 47 
 48             int length = 0;
 49 
 50             while ((length = is.read(buffer)) > 0) {
 51                 os.write(buffer, 0, length);
 52             }
 53 
 54             is.close();
 55 
 56             os.close();
 57         }
 58         return SUCCESS;
 59     }
 60 
 61     
 62     
 63     
 64     public String getUsername() {
 65         return username;
 66     }
 67 
 68     public void setUsername(String username) {
 69         this.username = username;
 70     }
 71 
 72     public String getPassword() {
 73         return password;
 74     }
 75 
 76     public List getDataUrl() {
 77         return dataUrl;
 78     }
 79 
 80 
 81 
 82 
 83     public void setDataUrl(List dataUrl) {
 84         this.dataUrl = dataUrl;
 85     }
 86 
 87 
 88 
 89 
 90     public void setPassword(String password) {
 91         this.password = password;
 92     }
 93 
 94     public List getFile() {
 95         return file;
 96     }
 97 
 98     public void setFile(List file) {
 99         this.file = file;
100     }
101 
102     public List getFileFileName() {
103         return fileFileName;
104     }
105 
106     public void setFileFileName(List fileFileName) {
107         this.fileFileName = fileFileName;
108     }
109 
110     public List getFileContentType() {
111         return fileContentType;
112     }
113 
114     public void setFileContentType(List fileContentType) {
115         this.fileContentType = fileContentType;
116     }
117 }

4、显示上传结果页面uploadResult.jsp

 1 <%@ page language="java" contentType="text/html; charset=GB18030"
 2     pageEncoding="GB18030"%>
 3 <%
 4 String path = request.getContextPath();
 5 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 6 %>   
 7 <%@ taglib prefix="s" uri="/struts-tags" %>
 8  
 9 
10 
11 
12 
13 
14 
15 
16 
17 <%=basePath %>
18 username: 

19 
20 password: 

21 
22 file: 
23 
24 
25 
26     

27 
28 
29 

5、我的Tomcat安装在D盘，要在“D:\Tomcat6.0\webapps\MyUpload”文件夹下新建一个upload文件夹，否则运行会报错，提示找不到路径，这个功能也可以在代码中添加。下边是运行效果：

（1）上传页面

（2）结果显示

ps：第一行的路径是写程序时做测试用的，没有实际意义。

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