二阶段Struts2学习笔记

刚刚学了下Struts2，做个文件上传的小东西
以做一个文件上传的例子展开
要想用Struts2，首先下个Struts2.0的包
http://people.apache.org/builds/struts/
这里版本可是真不少的，我下的2.1.2的包
也就是struts-2.1.2-all.zip 这头东西
下完了就可以开始配置运行环境了

新建一个WebProject，名字就叫myStruts2好了
要正常启动能运行Struts2最少需要5个Struts2包里lib目录下的5个文件
分别是：
commons-logging-1.0.4.jar
freemarker-2.3.12.jar
ognl-2.6.11.jar
struts2-core-2.1.2.jar
xwork-2.1.1.jar
为了做下面这个例子，还需要拷贝
commons-io-1.3.2.jar
commons-fileupload-1.2.1.jar

这7个文件copy到项目webroot下的WEB-INF下的lib目录下就行了

准备工作完毕。开工，做这个文件上传的例子
首先配置WEB-INF下的web.xml文件如下：

1 <? xml version="1.0" encoding="UTF-8" ?>
2 < web-app version ="2.4" xmlns ="http://java.sun.com/xml/ns/j2ee"
3     xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
4     xsi:schemaLocation ="http://java.sun.com/xml/ns/j2ee
5     http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd" >
6
7      < filter >
8          < filter-name > struts2 </ filter-name >
9          < filter-class >
10             org.apache.struts2.dispatcher.FilterDispatcher
11          </ filter-class >
12      </ filter >
13      < filter-mapping >
14          < filter-name > struts2 </ filter-name >
15          < url-pattern > /* </ url-pattern >
16      </ filter-mapping >
17
18      < welcome-file-list >
19          < welcome-file > index.jsp </ welcome-file >
20      </ welcome-file-list >
21
22 </ web-app >
23

然后修改下index.jsp文件，做一个文件上传的页面

1 <% @ page language = " java " pageEncoding = " UTF-8 " %>
2 <% @ taglib prefix = " s " uri = " /struts-tags " %>
3
4 <! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" >
5 < html >
6    < head >
7
8      < title > My JSP 'index.jsp' starting page </ title >
9      < meta http-equiv ="pragma" content ="no-cache" >
10      < meta http-equiv ="cache-control" content ="no-cache" >
11      < meta http-equiv ="expires" content ="0" >
12      < meta http-equiv ="keywords" content ="keyword1,keyword2,keyword3" >
13      < meta http-equiv ="description" content ="This is my page" >
14      
17    </ head >
18
19    < body >
20      < s:form action ="upload"   method ="post" enctype ="multipart/form-data" >
21      < s:file name ="pic" label ="请选择文件" ></ s:file >
22      < s:submit value ="提交" ></ s:submit >
23      </ s:form >< br >
24    </ body >
25 </ html >
26

做好这里，然后在src目录下创建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 < struts >
6      < constant name ="struts.devMode" value ="true" />
7
8      < package name ="default" extends ="struts-default" >
9          < action name ="upload" class ="com.home.jiangfan.Upload" >
10          < interceptor-ref name ="timer" ></ interceptor-ref >
11          < interceptor-ref name ="defaultStack" ></ interceptor-ref >
12          < result name ="success" > /result.jsp </ result >
13          </ action >
14      </ package >
15
16
17
18 </ struts >
19
20

接着创建Upload.java文件，在src里我新建了com.home.jiangfan的包，文件在这个包里

1 package com.home.jiangfan;
2
3 import java.io.*;
4 import java.util.*;
5
6 import org.apache.struts2.interceptor.ParameterAware;
7
8 public class Upload implements ParameterAware{
9     Map parameters;
10     File pic;
11     String picContentType;
12     String picFileName;
13     public File getPic() {
14         return pic;
15     }
16     public void setPic(File pic) {
17         this.pic = pic;
18     }
19     public String getPicContentType() {
20         return picContentType;
21     }
22     public void setPicContentType(String picContentType) {
23         this.picContentType = picContentType;
24     }
25     public String getPicFileName() {
26         return picFileName;
27     }
28     public void setPicFileName(String picFileName) {
29         this.picFileName = picFileName;
30     }
31
32     public String execute(){
33         String path="D:"+File.separator+"copytest"+File.separator;
34         path=path+picFileName;
35         File des=new File(path);
36         if(des.exists()){
37             des.delete();
38         }
39         pic.renameTo(des);
40
41         return "success";
42     }
43
44     public void setParameters(Map arg0) {
45         // TODO Auto-generated method stub
46         parameters=arg0;
47     }
48
49 }
50

好了，然后做一个返回的result页面

1 <% @ page language="java" pageEncoding="UTF-8" %>
2 <% @ taglib prefix="s" uri="/struts-tags" %>
3
4 <! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" >
5 < html >
6    < head >
7
8      < title > My JSP 'index.jsp' starting page </ title >
9      < meta http-equiv ="pragma" content ="no-cache" >
10      < meta http-equiv ="cache-control" content ="no-cache" >
11      < meta http-equiv ="expires" content ="0" >
12      < meta http-equiv ="keywords" content ="keyword1,keyword2,keyword3" >
13      < meta http-equiv ="description" content ="This is my page" >
14      
17    </ head >
18
19    < body >
20   文件名 < s:property value ="picFileName" />
21   文件类型 < s:property value ="picContentType" />
22    </ body >
23 </ html >
24

其中为了修改文件上传里，文件size的限制，需要在src目录下添加一个struts.properties文件：
struts.multipart.maxSize=1024000000

这里我设置的大小是1G(这个总够了吧！)
配合这个使用的方式，还需要在struts.xml里的Action标签中间添加一段：
<interceptor-ref name="defaultStack">
<param name="fileUpload.maximumSize">1024000000</param>
</interceptor-ref>

实际上是修改fileUpload这个拦截器中的maximumSize参数值
搞定~~

睡觉~~了~~

二阶段Struts2学习笔记

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