第一在pom.xml导入相应的包
（网上有很多导入多个包的教程，我缩减到一个了）
1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>com.lgp</groupId> 5 <artifactId>maven_struts2</artifactId> 6 <packaging>war</packaging> 7 <version>0.0.1-SNAPSHOT</version> 8 <name>maven_struts2 Maven Webapp</name> 9 <url>http://maven.apache.org</url> 10 <properties> 11 <project.build.sourceEncoding> 12 UTF-8 13 </project.build.sourceEncoding> 14 </properties> 15 16 <dependencies> 17 <dependency> 18 <groupId>junit</groupId> 19 <artifactId>junit</artifactId> 20 <version>3.8.1</version> 21 <scope>test</scope> 22 </dependency> 23 <dependency> 24 <groupId>org.apache.struts</groupId> 25 <artifactId>struts2-core</artifactId> 26 <version>2.3.31</version> 27 </dependency> 28 </dependencies> 29 <build> 30 <finalName>maven_struts2</finalName> 31 </build> 32 </project>
导入包之后，有的电脑会报错，maven-update就好了
然后去web.xml那里注册struts2的过滤器
1 <!DOCTYPE web-app PUBLIC 2 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" 3 "http://java.sun.com/dtd/web-app_2_3.dtd" > 4 5 <web-app> 6 <display-name>Archetype Created Web Application</display-name> 7 <filter> 8 <filter-name>struts2</filter-name> 9 <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> 10 </filter> 11 12 <filter-mapping> 13 <filter-name>struts2</filter-name> 14 <url-pattern>/*</url-pattern> 15 </filter-mapping> 16 </web-app>
然后就写struts.xml，记住放在resources文件夹下
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 <!-- name:包名,可自定义 extends：继承 namespace:命名空间 --> 8 <!-- 定义常量 请求后缀 默认是.action --> 9 <!-- 但指定了之后 就必须写上后缀 --> 10 <constant name="struts.action.extension" value="action,do" /> 11 <package name="helloworld" extends="struts-default" namespace="/"> 12 <action name="helloworld_*" class="com.action.HelloWorldAction" 13 method="{1}"> 14 <result name="{1}">{1}.jsp</result> 15 </action> 16 </package> 17 <package name="user" namespace="/" extends="struts-default"> 18 <interceptors> 19 <interceptor name="myInterceptor" class="com.interceptor.MyInterceptor"></interceptor> 20 <interceptor-stack name="mystack"> 21 <interceptor-ref name="defaultStack" /> 22 <interceptor-ref name="myInterceptor" /> 23 <!-- 先进入默认拦截器，再到自定义拦截器 --> 24 </interceptor-stack> 25 </interceptors> 26 <action name="user_login" class="com.action.UserAction" method="login"> 27 <interceptor-ref name="mystack"></interceptor-ref> 28 <result name="success">userinfo.jsp</result> 29 </action> 30 </package> 31 </struts>
action类
1 package com.action; 2 3 public class HelloWorldAction { 4 public String a() { 5 System.out.println("a.."); 6 return "a"; 7 } 8 9 public String b() { 10 System.out.println("b.."); 11 return "b"; 12 } 13 14 public String c() { 15 System.out.println("c.."); 16 return "c"; 17 } 18 19 public String user() { 20 System.out.println("user.."); 21 return "user"; 22 } 23 } 24 25 26 27 28 package com.action; 29 30 import com.entiy.User; 31 import com.opensymphony.xwork2.ActionContext; 32 import com.opensymphony.xwork2.ActionSupport; 33 import com.opensymphony.xwork2.util.ValueStack; 34 35 public class UserAction extends ActionSupport { 36 private static final long serialVersionUID = -1417237614181805435L; 37 private String name; 38 private String pwd; 39 40 public String login() { 41 System.out.println("login.."); 42 System.out.println("name----" + name); 43 System.out.println("pwd----" + pwd); 44 // ValueStack vs=ActionContext.getContext().getValueStack(); 45 ActionContext context = ActionContext.getContext(); 46 ValueStack vs = context.getValueStack(); 47 // 值栈的栈顶 48 49 User user = new User("张三", "张三的密码"); 50 vs.push(user); 51 return SUCCESS; 52 } 53 54 public String getName() { 55 return name; 56 } 57 58 public void setName(String name) { 59 this.name = name; 60 } 61 62 public String getPwd() { 63 return pwd; 64 } 65 66 public void setPwd(String pwd) { 67 this.pwd = pwd; 68 } 69 }
实体类
1 package com.entiy; 2 3 public class User { 4 private String name; 5 private String pwd; 6 7 public User(String name, String pwd) { 8 this.name = name; 9 this.pwd = pwd; 10 } 11 12 public String getPwd() { 13 return pwd; 14 } 15 16 public void setPwd(String pwd) { 17 this.pwd = pwd; 18 } 19 20 public String getName() { 21 return name; 22 } 23 24 public void setName(String name) { 25 this.name = name; 26 } 27 }
拦截器
1 package com.interceptor; 2 3 import com.opensymphony.xwork2.ActionInvocation; 4 import com.opensymphony.xwork2.interceptor.AbstractInterceptor; 5 6 /** 7 * 自定义拦截器 8 * 9 * @author SUMMER 10 * 11 */ 12 public class MyInterceptor extends AbstractInterceptor { 13 14 /** 15 * 16 */ 17 private static final long serialVersionUID = 1L; 18 19 /** 20 * 判断session有关的操作 21 */ 22 @Override 23 public String intercept(ActionInvocation actioninvocation) throws Exception { 24 System.out.println("我的拦截器开始..."); 25 actioninvocation.invoke(); 26 System.out.println("我的拦截器结束..."); 27 // AOP 面向切面编程 28 return null; 29 } 30 31 }
a.jsp/b.jsp/c.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> aaaaaaaaaaaaaaaa </body> </html>
index.jsp
a没有后缀所以是错误的
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 <a href="<%=request.getContextPath() %>/helloworld_a">a</a> 11 <br><br> 12 <a href="<%=request.getContextPath() %>/helloworld_b.do">b</a> 13 <br><br> 14 <a href="<%=request.getContextPath() %>/helloworld_c.action">c</a> 15 <br><br> 16 <a href="<%=request.getContextPath() %>/helloworld_user.action">用户</a> 17 </body> 18 </html>
user.jsp/userinfo.jsp
姓名分成3组
第二第三组是一对的，第一是混搭的，注意取值的方法
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8"%> 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 4 <html> 5 <head> 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 7 <title>Insert title here</title> 8 </head> 9 <body> 10 <form action="<%=request.getContextPath() %>/user_login.do" method="post"> 11 姓名:<input type="text" name="name"> 12 <br><br> 13 密码:<input type="text" name="pwd"> 14 <br><br> 15 <input type="submit" value="登录"> 16 </form> 17 </body> 18 </html>
1 <%@ page language="java" contentType="text/html; charset=UTF-8" 2 pageEncoding="UTF-8" isELIgnored="false"%> 3 <%@taglib uri="/struts-tags" prefix="s"%> 4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 5 <html> 6 <head> 7 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 8 <title>Insert title here</title> 9 </head> 10 <body> 11 姓名1:${name} 12 <br>密码1:<%=request.getParameter("pwd")%><br> 13 <br>姓名2: 14 <s:property value="[0].name" /> 15 <br>密码2:${requestScope.pwd} 16 <br>姓名3: 17 <s:property value="[1].name" /> 18 <br>密码3: 19 <s:property value="[1].pwd" /> 20 <br> 21 </body> 22 </html>