SSH构造struts2项目

ydymz

发布于 2018-09-10 15:02:46

2390

发布于 2018-09-10 15:02:46

文章被收录于专栏：lgp20151222lgp20151222

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>

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原始发表：2017-02-26 ，如有侵权请联系 cloudcommunity@tencent.com 删除

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