一 ，入门小案例
1，首先引入三个jar
<dependency>
<groupId>javaee</groupId>
<artifactId>javaee-api</artifactId>
<version>5</version>
</dependency>
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
<version>2.3.4.1</version>
</dependency>
<dependency>
<groupId>org.apache.struts.xwork</groupId>
<artifactId>xwork-core</artifactId>
<version>2.3.4.1</version>
</dependency>
2,配置web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<filter>
<filter-name>struts1</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts1</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
3,创建实体类HelloAction并实现Action
public class HelloAction implements Action{
public String execute() throws Exception {
return SUCCESS;
}
}
4,创建配置文件struts.xml
<?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>
<action name="hello" class="cn.happy.controller.HelloAction">
<result name="success">index.jsp</result>
</action>
</package>
</struts>
5，入门小案例就写完啦，通过struts.xml中action的name名来访问。
二 ，登陆小案例
1，创建实体类LoginAction
private String username; //用户名
private String password; //登陆密码
public String execute() throws Exception {
//如果你的用户名和密码都是admin,return success.反之，走到login
if(username.equals("admin")&&password.equals("admin")){
return SUCCESS;
}else {
return LOGIN;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
2，配置struts.xml
<?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>
<action name="login" class="cn.happy.controller.LoginAction">
<result name="success">day01/success.jsp</result>
<result name="login">day01/login.jsp</result>
</action>
</package>
</struts>
3,开发视图登陆页面
<%@taglib prefix="s" uri="/struts-tags" %> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <s:form name="form1" namespace="/" method="post" action="login"> 请输入用户名：</br> <s:textfield name="username"/> 请输入密码：<s:password name="password"/> <s:submit value="登陆"></s:submit> </s:form> </body> </html>
三，强化一下刚才的登陆案例，通过javaBean自动装配
1,新建实体类UserInfo
2,修改刚才的LoginAction页面
//植入实体类
private UserInfo info=new UserInfo();
public String execute() throws Exception {
//如果你的用户名和密码都是admin,return success.反之，走到login
if(info.getUsername().equals("admin")&&info.getPassword().equals("admin")){ return SUCCESS; }else { return LOGIN; }
public UserInfo getInfo() {
return info;
}
public void setInfo(UserInfo info) {
this.info = info;
}
}
3，修改一下登陆页面
<%@taglib prefix="s" uri="/struts-tags" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<s:form name="form1" namespace="/" method="post" action="login">
请输入用户名：</br> <s:textfield name="info.username"/>
请输入密码：<s:password name="info.password"/>
<s:submit value="登陆"></s:submit> </s:form> </body> </html>
4，登陆成功后success.jsp
5,这个时候登录名已经自动装配上了
四，Struts2访问Servlet API
解耦方案一：： 对Servlet API进行封装 ，借助ActionContext
