全局变量是一个包内所有action都可能用到的，首先检查自己的<action>标签内是否有匹配的result字符串，如果没有去去全局变量中找
1在HeadFirstStruts2chapter02_07中,新建HelloAction，error属性，设置逻辑代码。返回值"error"
import com.opensymphony.xwork2.ActionSupport;
public class HelloAction extends ActionSupport{
private String error ;
public String getError() {
return error;
}
public void setError(String error) {
this.error = error;
}
public String error(){
return "error2";
}
}
2在struts.xml中，设置error的全局变量，
<?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.enable.DynamicMethodInvocation" value="true"/>
<package name="manage" namespace="/" extends="struts-default">
<global-results>
<result name="error2">error.jsp</result>
</global-results>
<action name="hello" class="com.cruise.action.HelloAction" >
<result name="redirectAction2" type="redirectAction" >hello2</result>
</action>
</package>
</struts>
3index.jsp 中写调用代码。依然是动态方法调用
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<a href="hello!error?error=您点击的页面有误！！" target="_blank">全局变量</a>
</body>
</html>
4error.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN""http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
错误提示:${error}
</body>
</html>
5在struts.xml中，现在中找的name为error，如果找不到，再去全局变量中找name为"error"的标签
6测试
http://localhost:8080/HeadFirstStruts2chapter02_07/
第17讲 struts2设置全局
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转载自blog.csdn.net/u010393325/article/details/83928672
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