一.基本步骤:
1.准备struts2包:
最基本的五个jar包拷贝到WEB-INF的lib目录下,具体包名如下:
commons-logging-1.0.4.jar
freemarker-2.3.8.jar
ognl-2.6.11.jar
struts2-core-2.0.11.2.jar
xwork-2.0.5.jar
2.在web.xml注册和映射FilterDispatch
org.apache.struts2.dispatcher.FilterDispatcher
3.login.jsp界面
<form action="user!login.action">
4. 写UserAction类,不需要继承
5. 在一个配置文件struts.xml文件,放在src下面
二.一个action处理多个请求
1. 在action中把execute方法删除或改名
2. 创建自己的方法
3. <form action="user!login.action"
这里本来是action="user.action"
这里的login就是方法名
三.怎么使用request/ session
1. 只要在action写一个属性,并生成set/get就会自动保存到request
2. ActionContext.getContext().put("test2", "test2");
具体代码如下:
建立项目名称:Struts2.
在src目录下.建立包com.struts2.action
在包下面建立一个UserAction类;
具体代码如下:
package com.struts2.action;
import com.opensymphony.xwork2.ActionContext;
public class UserAction {
private String id;
private String username;
private String password;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
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;
}
/**
* 登陆方法;
* @return String;
*/
@SuppressWarnings("unchecked")
public String login(){
this.id = "1001";
//判断;
if(this.username.equals("zhouhaitao") && this.password.equals("7290783")){
//ActionContext.getContext.相当于request.setAttribuet()一样;
ActionContext.getContext().put("id",id);
//保存到session当中;
ActionContext.getContext().getSession().put("name", this.username+"登陆成功!");
return "yes";
}else{
return "no";
}
}
/**
* 注册方法;
*/
public String regester(){
System.out.println("调用注册的方法.开始注册!");
System.out.println(this.id);
System.out.println(this.username);
System.out.println(this.password);
ActionContext.getContext().put("name",this.username+"注册成功!");
return "yes";
}
}
之后,在src目录下:建立struts.xml文件.
内如如下:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd" >
<struts>
<!-- 可以引用其他的配置文件 -->
<include file="struts-default.xml"></include>
<!-- name代表包的名称 extends代表引用其他的默认文件,namespace代表命名空间,可选-->
<package name="com.struts2.action" extends="struts-default">
<!-- name 代表action名称,与struts1的path类似 -->
<action name="user" class="com.struts2.action.UserAction">
<result name="yes" type="dispatcher">success.jsp</result>
<result name="no" type="redirect">failure.jsp</result>
</action>
</package>
</struts>
在WebRoot目录下:创建一个login.jsp页面
具体代码如下:
<%@ page language="java" import="java.util.*" 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>Login Page</title>
<script type="text/javascript">
//提交;
function onSubmitLogin(){
var username = document.getElementById("username");
var password = document.getElementById("password");
var bol = false;
if(username.value == ""){
alert("用户名不能为空!");
username.focus();
bol = false;
return;
}
if(password.value == "" || password.value.length <=0){
alert("密码不能为空!");
password.focus();
bol=false;
return;
}
if(bol=true){
document.getElementById("myform").submit();
}
}
</script>
</head>
<body οnlοad="document.getElementById('username').focus()">
<center>
<h1>用户登陆</h1>
<form action="user!login.action" method="post" name="myform" id="myform">
用户名:<input type="text" name="username"> <Br/>
密码: <input type="password" name="password"><Br/><Br/>
<input type="button" value=" 登 陆 " οnclick="onSubmitLogin()">
<input type="reset" value=" 重 置 ">
</form>
</center>
</body>
</html>
建立一个success.jsp 页面 和failure.jsp页面。
<%@ 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>
<font color="red"><h1>恭喜:${request.name }</h1></font>
<Br/>
<a href="http://localhost:8080/Struts2/regist.jsp">返回注册页面</a>
<a href="http://localhost:8080/Struts2/login.jsp">返回登陆页面</a>
</body>
</html>
failure页面:
<%@ 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>
<font color="red"><h1>抱歉,登陆失败!!</h1></font><br/>
<a href="http://localhost:8080/Struts2/login.jsp">返回登陆页面</a>
</body>
</html>
配置web.xml文件、
代码如下:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>Struts2</display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
在tomcat中部署,发布启动服务.
在流量器中运行:
http://localhost:8080/Struts2/login.jsp
然后,输入正确的用户名和密码.
ok。登陆成功!