struts 上传文件 Dynavalidatorform 实例

浏览数：40 / 时间：2015年06月09日

一、相关jar包
一个空struts工程的jar包：技术分享
另上传文件的两个jar包：

二、页面

1、上传页面upload.jsp

 1 <%@ page language="java" contentType="text/html; charset=utf-8"
 2     pageEncoding="utf-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 <form action="upload.do" method="post" enctype="multipart/form-data">
11 <input type="file" name="upload_file" value="" id="upload_file" style="height:20px;">
12 <input  type="submit" id="submitButton"  value="提交">
13 </form>
14 </body>
15 </html>

注：a. form表单要有属性 enctype="multipart/form-data"。
b. 上传文件的选择文件input的name属性name="upload_file" 要与下面的form-bean下form-property的name值一致。

2、struts-config.xml

 1 <?xml version="1.0" encoding="utf-8" ?>
 2 
 3 <!DOCTYPE struts-config PUBLIC
 4           "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
 5           "http://struts.apache.org/dtds/struts-config_1_3.dtd">
 6 <struts-config>
 7     <form-beans>
 8         <form-bean name="upload"
 9             type="org.apache.struts.validator.DynaValidatorForm">
10             <form-property name="upload_file" type="org.apache.struts.upload.FormFile" />
11         </form-bean>
12     </form-beans>
13 
14     <action-mappings>
15         <action path="/upload" type="com.UploadAction" name="upload"
16             scope="request">
17             <forward name="sucess" path="/sucess.jsp"></forward>
18         </action>
19     </action-mappings>
20 
21     <plug-in className="org.apache.struts.validator.ValidatorPlugIn">
22         <set-property property="pathnames"
23             value="/org/apache/struts/validator/validator-rules.xml,
24                /WEB-INF/validation.xml" />
25     </plug-in>
26 
27 </struts-config>

注：第8行 form-bean的name属性值要与第15行action的name值一致。

3、UploadAction.java

 1 package com;
 2 
 3 import java.io.BufferedOutputStream;
 4 import java.io.File;
 5 import java.io.FileNotFoundException;
 6 import java.io.FileOutputStream;
 7 import java.io.IOException;
 8 import java.io.InputStream;
 9 
10 import javax.servlet.http.HttpServletRequest;
11 import javax.servlet.http.HttpServletResponse;
12 
13 import org.apache.struts.action.Action;
14 import org.apache.struts.action.ActionForm;
15 import org.apache.struts.action.ActionForward;
16 import org.apache.struts.action.ActionMapping;
17 import org.apache.struts.action.DynaActionForm;
18 import org.apache.struts.upload.FormFile;
19 
20 public class UploadAction extends Action {
21 
22     public ActionForward execute(ActionMapping mapping, ActionForm form,
23             HttpServletRequest request, HttpServletResponse response) {
24 
25         DynaActionForm dynaForm = (DynaActionForm) form;
26         ////这个upload_file对应配置form-property 和jsp页面里选择文件input
27         FormFile file = (FormFile) dynaForm.get("upload_file");
28         
29         String loalPath = null;
30         String filePath = null;
31         if (file != null && !file.toString().trim().equals("")) {
32             loalPath = file.getFileName();
33             try {
34                 InputStream in = file.getInputStream();
35                 int length = 0;
36                 String path = this.getServlet().getServletContext().getRealPath("/upload")+ "\\" + loalPath;
37                 File outFile = new File(path);
38                 if (!outFile.getParentFile().exists())
39                     outFile.getParentFile().mkdirs();
40                 if (outFile.exists()) {
41                     outFile.delete();
42                 }
43                 BufferedOutputStream out = new BufferedOutputStream(
44                         new FileOutputStream(outFile));
45                 byte[] buffer = new byte[4096];
46                 while ((length = in.read(buffer)) != -1) {
47                     out.write(buffer, 0, length);
48                 }
49                 in.close();
50                 out.close();
51                 System.out.println(filePath);
52             } catch (FileNotFoundException e) {
53                 // TODO Auto-generated catch block
54                 e.printStackTrace();
55             } catch (IOException e) {
56                 // TODO Auto-generated catch block
57                 e.printStackTrace();
58             }
59         }
60         return mapping.findForward("sucess");
61     }
62 
63 }