Struts2中的攔截器入門
阿新 • • 發佈：2018-12-23
1。Struts.xml檔案：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<package name="default" namespace="/" extends="struts-default">
<interceptors 2。定義的攔截器MyInterceptor.java檔案：
package cn.itcast.intercept;
import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;
public class MyInterceptor implements 3。動作類Demo1Action.java 檔案：
package cn.itcast.action;
import com.opensymphony.xwork2.ActionSupport;
public class Demo1Action extends ActionSupport {
@Override
public String execute() throws Exception {
System.out.println("demo1 action");
return "login";
}
public String a() throws Exception {
System.out.println("a action");
return null;
}
}
4。檢視login.jsp檔案：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<s:fielderror/>
<s:actionerror/>
<form action="${pageContext.request.contextPath}/login" method="post">
username:<input type="text" name=username><br>
password:<input type="password" name="password"><br>
<input type="submit" value="login">
</form>
</body>
</html>