Struts2视图转发类型

 在Struts2中result的视图转发类型比较常用的有四种：dispathcher(默认值)：服务器内部请求转发类型;  redirect：重定向到某个jsp文件;  redirectAction:重定向到某个action;  plainText:他主要用在输出页面源代码。

在struts.xml中配置如下:

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 < package name ="lz" namespace ="/control/employee" extends ="struts-default" >
8 <!-- 浏览器重定向到修改界面 -->
9 < action name ="redirect" class ="com.lz.action.UserName" method ="execute" >
10 < result name ="success" type ="redirect" > /redirect.jsp?username=${Savepath} </ result >

 

在web.xml中：

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

 

再定义一个UserName.java

1 package com.lz.action;
2
3 import java.net.URLEncoder;
4
5 public class UserName {
6 private String Savepath;
7
8 public void setSavepath(String savepath) {
9 Savepath = savepath;
10 }
11
12 public String getSavepath() {
13 return Savepath;
14 }
15
16 public String execute() throws Exception
17 {
18 Savepath = URLEncoder.encode( " 天下第一 " , " utf-8 " );
19
20 return " success " ;
21 }
22
23 }

 页面代码：

<% @ page language = " java " import = " java.util.*,java.net.URLDecoder " pageEncoding = " UTF-8 " %>

<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" >
< html >
< head >

< title > redrect </ title >

< meta http-equiv ="pragma" content ="no-cache" >
< meta http-equiv ="cache-control" content ="no-cache" >
< meta http-equiv ="expires" content ="0" >

</ head >

< body >
<% = URLDecoder.decode( new String (request.getParameter( " username " ).getBytes( " ISO8859-1 " ), " UTF-8 " ), " UTF-8 " ) %> < br />
<% = URLDecoder.decode( new String (request.getParameter( " username " ).getBytes( " ISO8859-1 " ), " UTF-8 " ), " UTF-8 " ) %>

</ body >
</ html >

这样，运行。页面上就会出现“天下第一”四个字。

 接下来是redirectAction类型。在struts.xml增加action标签。

<? xml version="1.0" encoding="UTF-8" ?>
<! DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd" >

< struts >
< package name ="lz" namespace ="/control/employee" extends ="struts-default" >
　　< action name ="redirectAction" class ="com.lz.action.UserName" method ="execute" >
< result name ="success" type ="redirectAction" > /hello </ result >
</ action >
</ package >
< package name ="other" namespace ="/control/department" extends ="struts-default" >
< action name ="redirect" >
< result > /index.jsp </ result >
</ action >
</ package >
</ struts >

 这样在浏览器中输入： http://localhost:8080/control/department/redirect.action就会跳到hello.jsp页面里。

 还有最后一种：plainText。他主要用在输出页面源代码。

如下所示：修改struts.xml文件。

 

< action name ="plainText" >
< result type ="plainText" >
< param name ="location" > /redirect.jsp </ param >
< param name ="charSet" > UTF-8 </ param > <!-- 制定读取文件的编码 -->
</ result >
</ action >

 

< %@ page language ="java" import ="java.util.*,java.net.URLDecoder" pageEncoding ="UTF-8" % >

<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" >
< html >
< head >

< title > redrect </ title >

< meta http-equiv ="pragma" content ="no-cache" >
< meta http-equiv ="cache-control" content ="no-cache" >
< meta http-equiv ="expires" content ="0" >

</ head >

< body >
你好！

</ body >
</ html >

 

 这样，就可以输出redirect.jsp的源码了。并且可以支持中文格式的了。