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）
代码语言：javascript复制 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
代码语言：javascript复制 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
代码语言：javascript复制 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
代码语言：javascript复制 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
代码语言：javascript复制 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
代码语言：javascript复制 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
代码语言：javascript复制<%@ 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
代码语言：javascript复制 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
代码语言：javascript复制 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>
