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一个简单的Struts2的使用示例，主要功能是检查用户从jsp页面中输入的用户名是否与密码一致。
首先是jsp部分的代码。jsp页面做了一个form表单的请求，和AJAX的请求。
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <% 3 String path = request.getContextPath(); 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 5 %> 6 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 8 <html> 9 <head> 10 <base href="<%=basePath%>"> 11 12 <title>Hello Struts2</title> 13 <meta http-equiv="pragma" content="no-cache"> 14 <meta http-equiv="cache-control" content="no-cache"> 15 <meta http-equiv="expires" content="0"> 16 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 17 <meta http-equiv="description" content="This is my page"> 18 <!-- 19 <link rel="stylesheet" type="text/css" href="styles.css"> 20 --> 21 <script src="./dist/jquery-2.0.0.min.js"></script> 22 <style type="text/css"> 23 input{ 24 width:100% 25 } 26 </style> 27 </head> 28 29 <body> 30 <h1>Hello Struts2</h1> 31 <div> 32 <h2>Form表单</h2> 33 <form action="UserLoginAction.action"> 34 <table> 35 <tr> 36 <td>用户名：</td><td><input type="text" name="username"></td> 37 </tr> 38 <tr> 39 <td>密码：</td><td><input type="password" name="password"></td> 40 </tr> 41 <tr><td><input type="submit" value="提交"></td></tr> 42 </table> 43 </form> 44 </div> 45 <div> 46 <h2>AJAX调用</h2> 47 <table> 48 <tr><td>用户名：</td><td><input id="usernames"></td></tr> 49 <tr><td>密码：<td><input id="passwords" type="password"></td></tr> 50 <tr><td><button onclick="check()">提交</button></td></tr> 51 </table> 52 53 </div> 54 55 </body> 56 57 <script type="text/javascript"> 58 function check(){ 59 $.post("/UserLoginStruts2/UserLoginAction2.action",{ 60 password:document.getElementById("passwords").value, 61 username:document.getElementById("usernames").value, 62 63 },function(data,status){ 64 alert(data); 65 }); 66 } 67 </script> 68 69 </html>
form表单请求action后，根据结果进行跳转，两个跳转页面的代码。
1 <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> 2 <% 3 String path = request.getContextPath(); 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 5 %> 6 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 8 <html> 9 <head> 10 <base href="<%=basePath%>"> 11 12 <title>My JSP ‘fail.jsp‘ starting page</title> 13 14 <meta http-equiv="pragma" content="no-cache"> 15 <meta http-equiv="cache-control" content="no-cache"> 16 <meta http-equiv="expires" content="0"> 17 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 18 <meta http-equiv="description" content="This is my page"> 19 <!-- 20 <link rel="stylesheet" type="text/css" href="styles.css"> 21 --> 22 23 </head> 24 25 <body> 26 Fail <br> 27 </body> 28 </html>
1 <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> 2 <% 3 String path = request.getContextPath(); 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 5 %> 6 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 8 <html> 9 <head> 10 <base href="<%=basePath%>"> 11 12 <title>My JSP ‘result.jsp‘ starting page</title> 13 14 <meta http-equiv="pragma" content="no-cache"> 15 <meta http-equiv="cache-control" content="no-cache"> 16 <meta http-equiv="expires" content="0"> 17 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 18 <meta http-equiv="description" content="This is my page"> 19 <!-- 20 <link rel="stylesheet" type="text/css" href="styles.css"> 21 --> 22 23 </head> 24 25 <body> 26 TRUE 27 </body> 28 </html>
form表单的请求会根据结果进行跳转；利用AJAX请求，会将判断结果，返回给jsp页面，并提示。
然后是两个Action部分的代码。
form表单所请求的action代码
1 package struts; 2 3 import com.opensymphony.xwork2.ActionSupport; 4 5 public class UserLoginAction extends ActionSupport{ 6 private String username,password; 7 8 @Override 9 public String execute() throws Exception { 10 System.out.println("Checking..."); 11 if(this.username.equals(this.password)){ 12 return "Success"; 13 }else{ 14 return "Fail"; 15 } 16 } 17 18 public String getUsername() { 19 return username; 20 } 21 22 public void setUsername(String username) { 23 this.username = username; 24 } 25 26 public String getPassword() { 27 return password; 28 } 29 30 public void setPassword(String password) { 31 this.password = password; 32 } 33 34 35 36 }
AJAX所请求的Action代码
1 package struts; 2 3 import org.apache.struts2.ServletActionContext; 4 5 import com.opensymphony.xwork2.ActionSupport; 6 7 public class UserLoginAction2 extends ActionSupport{ 8 private String username,password; 9 10 @Override 11 public String execute() throws Exception { 12 System.out.println("Checking2..."); 13 System.out.println(password); 14 System.out.println(username); 15 System.out.println(password.equals(username)); 16 String str= this.password.equals(this.username)?"Success":"Fail"; 17 ServletActionContext.getResponse().getWriter().print(str); 18 return null; 19 } 20 21 public String getUsername() { 22 return username; 23 } 24 25 public void setUsername(String username) { 26 System.out.println("SET:"+username); 27 this.username = username; 28 } 29 30 public String getPassword() { 31 return password; 32 } 33 34 public void setPassword(String password) { 35 this.password = password; 36 } 37 38 39 40 }
Struts的配置文件。
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"> 3 <struts> 4 5 <package name="struts" namespace="/" extends="struts-default"> 6 <action name="UserLoginAction" class="struts.UserLoginAction"> 7 <param name="username">default</param> 8 <param name="password">defaults</param> 9 <result name=‘Fail‘>/fail.jsp</result><result name=‘Success‘>/true.jsp</result></action> 10 <action name="UserLoginAction2" 11 class="struts.UserLoginAction2"> 12 <param name="username"></param> 13 <param name="password"></param> 14 </action></package></struts>
WEB的配置文件。
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> 3 <display-name>UserLoginStruts2</display-name> 4 <filter> 5 <filter-name>struts2</filter-name> 6 <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> 7 </filter> 8 <filter-mapping> 9 <filter-name>struts2</filter-name> 10 <url-pattern>*.action</url-pattern> 11 </filter-mapping> 12 </web-app>
通过这个实例，主要是为了熟悉Struts2的基本流程，利用MyEclipse2014开发Struts2的项目还是很方便的。只需要将所需要的Action写好，同时在struts.xml中配置好Action与具体的类的关系和一些参数信息。就可以了。
作为初学者，代码中有什么漏洞或者不规范的地方，希望给位大牛多多指教！！！
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原文地址：http://www.cnblogs.com/firmhappy/p/4802613.html
