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學了一定的jsp基礎之后，我們可以試著去嘗試去實現一個簡單的struts2的動態登錄功能，具體代碼如下：
一、目錄結構
首先，lib中導入struts2所需的核心包，
下載地址：http://struts.apache.org/download.cgi#struts23281
總體目錄結構如下：
二、web.xml中
<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>srtuts2</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <filter> <filter-name>Struts2</filter-name> <filter-class> org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter </filter-class> </filter> <filter-mapping> <filter-name>Struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
三、創建一個用戶類User.java
package com.ruanjian.model;
public class User {
private String userName;
private String passworld;
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassworld() {
return passworld;
}
public void setPassworld(String passworld) {
this.passworld = passworld;
}
}四、創建login.jsp文件，用于登錄的主頁面：
<%@ 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>struts2登錄頁面</title> </head> <body> <form action = "login" method = "post" > 用戶名：<input type = "text" name = "userName" /> 密碼：<input type = "text" name = "passworld" /> <input type = "submit" value = "登錄" /> </form> </body> </html>
創建success.jsp文件，代表登錄成功頁面：
<%@ 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>登陸成功</title> </head> <body> 登陸成功！ </body> </html>
創建error.jsp文件，代表登錄失敗頁面：
<%@ 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>登錄失敗</title> </head> <body> 登錄失敗！ </body> </html>
五、創建UserService.java用于驗證用戶登錄
package com.ruanjian.service;
import com.ruanjian.model.User;
public class UserService {
public boolean isLogin(User user){
boolean flag = false;
if("admin".equals(user.getUserName()) && "123456".equals(user.getPassworld())){
flag = true;
}
return flag;
}
}六、創建LoginAction.java文件，后臺處理登錄
package com.ruanjian.action;
import com.opensymphony.xwork2.Action;
import com.ruanjian.model.User;
import com.ruanjian.service.UserService;
/**
* struts2登錄后臺處理
* @author
*
*/
public class LoginAction implements Action {
UserService userService = new UserService();
private String userName;
private String passworld;
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassworld() {
return passworld;
}
public void setPassworld(String passworld) {
this.passworld = passworld;
}
@Override
public String execute() throws Exception {
User user = new User();
user.setUserName(userName);
user.setPassworld(passworld);
if(userService.isLogin(user)){
return SUCCESS; //如果登錄成功，返回成功
}else{
return ERROR; //否則返回失敗
}
}七、新建struts.xml文件
<?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> <package name = "index" extends = "struts-default"> <action name = "login" class = "com.ruanjian.action.LoginAction"> <result name = "success">/success.jsp</result> <result name = "error">/error.jsp</result> </action> </package> </struts>
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