实现一个简单的拦截器

来源：互联网发布：其竟以此而殒其生乎编辑：程序博客网时间：2024/06/05 23:56

代码：

reg.jsp

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%><%@ 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>Struts 2拦截器应用</title></head><body><h1>用户注册</h1><s:form id="id" action="helloaction"> <s:textfield name="username" label="用户名"></s:textfield> <s:password name="pass1" label="密码"></s:password> <s:password name="pass2" label="重复密码"></s:password> <s:submit value="注册"></s:submit></s:form></body></html>

success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%><%@ taglib prefix="s" uri="/struts-tags"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><title>struts2 拦截器应用</title></head><body><h2>用户名：<s:property value="username"/></h2><h2>密码：<s:property value="pass1"/></h2></body></html>

HelloAction.java

package com.action;import com.opensymphony.xwork2.ActionSupport;public class HelloAction extends ActionSupport {private static final long serialVersionUID = 1L;private String username;private String pass1;private String pass2;public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPass1() {return pass1;}public void setPass1(String pass1) {this.pass1 = pass1;}public String getPass2() {return pass2;}public void setPass2(String pass2) {this.pass2 = pass2;}@Overridepublic String execute() throws Exception {// TODO Auto-generated method stubif(username!=null && getPass1().equals(getPass2()) && !getUsername().trim().equals("")){System.out.print("正在执行action！……");return SUCCESS;}else{System.out.print("正在执行action！……");return INPUT;}}}

HelloInterceptor.java(拦截器)

package com.inter;import com.action.HelloAction;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.interceptor.AbstractInterceptor;public class HelloInterceptor extends AbstractInterceptor {private static final long serialVersionUID = 1L;public String intercept(ActionInvocation arg0) throws Exception {@SuppressWarnings("unused")HelloAction haAction=(HelloAction)arg0.getAction();System.out.print("拦截器开始运行……");String resuletString = arg0.invoke();System.out.println("拦截器已结束……");return resuletString;}}

FilterHelloInterceptor.java

package com.inter;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;public class FilterHelloInterceptor extends MethodFilterInterceptor {private static final long serialVersionUID = 1L;protected String doIntercept(ActionInvocation arg0) throws Exception {// TODO Auto-generated method stubSystem.out.print("逻辑的实现过程是一样的，只是方法名不同而已！");String reString = arg0.invoke();return reString;}@Overridepublic void setExcludeMethods(String excludeMethods) {// TODO Auto-generated method stubsuper.setExcludeMethods(excludeMethods);}@Overridepublic void setIncludeMethods(String includeMethods) {// TODO Auto-generated method stubsuper.setIncludeMethods(includeMethods);}}

struts.xml

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"><struts>  <package name="HelloIntercertor" extends="struts-default">      <interceptors>          <interceptor name="helloInterceptor" class="com.inter.HelloInterceptor"></interceptor>      </interceptors>            <action name="helloaction" class="com.action.HelloAction">          <result name="success">/success.jsp</result>  <result name="input">/reg.jsp</result>    <interceptor-ref name="defaultStack"></interceptor-ref>  <interceptor-ref name="helloInterceptor"></interceptor-ref>      </action>  </package></struts>

截图：

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