redirect結(jié)果類型調(diào)用標(biāo)準(zhǔn)的response.sendRedirect()方法,使得瀏覽器向給定的位置創(chuàng)建一個(gè)新請(qǐng)求。
我們可以在<result ...>元素的主體中或作為<param name="location">的元素中給定位置。redirect還支持
parse參數(shù),以下是使用XML配置的示例:
<action name="hello"
class="cn.w3cschool.struts2.HelloWorldAction"
method="execute">
<result name="success" type="redirect">
<param name="location">
/NewWorld.jsp
</param >
</result>
</action>
可參考上面所說(shuō)的修改
WebContent/WEB-INF/classes/struts.xml文件來(lái)定義redirect結(jié)果類型:
<?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>
<constant name="struts.devMode" value="true" />
<package name="helloworld" extends="struts-default">
<action name="hello"
class="cn.w3cschool.struts2.HelloWorldAction"
method="execute">
<result name="success" type="redirect">
<param name="location">
/NewWorld.jsp
</param >
</result>
</action>
<action name="index">
<result >/index.jsp</result>
</action>
</package>
</struts>
這里的
NewWorld.jsp是一個(gè)新頁(yè)面,當(dāng)你的action返回“success”結(jié)果時(shí),將產(chǎn)生redirect結(jié)果。我們保留
WebContent/WEB-INF/lib/web.xml不做修改,其內(nèi)容如下:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>Struts 2</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.FilterDispatcher
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
創(chuàng)建action類文件
Java Resources/src/HelloWorldAction.java如下:
package cn.w3cschool.struts2;
import com.opensymphony.xwork2.ActionSupport;
public class HelloWorldAction extends ActionSupport{
private String name;
public String execute() throws Exception {
return "success";
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
創(chuàng)建包含以下內(nèi)容的主頁(yè)面WebContent/WEB-INF/index.jsp:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Hello World</title>
</head>
<body>
<h1>Hello World From Struts2</h1>
<form action="hello">
<label for="name">Please enter your name</label><br/>
<input type="text" name="name"/>
<input type="submit" value="Say Hello"/>
</form>
</body>
</html>
創(chuàng)建WebContent/WEB-INF/NewWorld.jsp,如果action返回“success”時(shí),請(qǐng)求將執(zhí)行redirect結(jié)果類型:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Redirected Page</title>
</head>
<body>
<h1>New Page after redirection</h1>
</body>
</html>
現(xiàn)在右鍵單擊項(xiàng)目名稱,然后單擊“Export”>“WAR File”創(chuàng)建WAR文件。然后在Tomcat的webapps目錄中部署這個(gè)WAR文件。最后,啟動(dòng)Tomcat服務(wù)器并嘗試訪問(wèn)URL http://localhost:8080/HelloWorldStruts2/index.action,將顯示如下界面:
在文本框中輸入任何值并提交,你可以看到redirection后的下一頁(yè):
更多建議: