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J2EE學(xué)習(xí)筆記——Struts2多方法實(shí)現(xiàn)

作者：兔子俠客
開發(fā) 后端
當(dāng)Web容器收到 請求（HttpServletRequest）它將請求傳遞給一個標(biāo)準(zhǔn)的的過濾鏈包括 流程（ActionContextCleanUp）過濾器，然后經(jīng)過Other filters...

實(shí)現(xiàn)  登陸 驗(yàn)證 和注冊 驗(yàn)證在一個  LoginAction  類中：

Login.jsp:

  1. <%@ page language="java"import="java.util.*"pageEncoding="utf-8"%> 
  2. <%@ taglib uri="/struts-tags"prefix="s" %> 
  3.    
  4. <%   
  5. String path = request.getContextPath();   
  6. String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";   
  7. %> 
  8.    
  9. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
  10. <html> 
  11.   <head> 
  12.     <basehrefbasehref="<%=basePath%>"> 
  13.        
  14.     <title>Login</title> 
  15.     <metahttp-equivmetahttp-equiv="pragma"content="no-cache"> 
  16.     <metahttp-equivmetahttp-equiv="cache-control"content="no-cache"> 
  17.     <metahttp-equivmetahttp-equiv="expires"content="0"> 
  18.     <metahttp-equivmetahttp-equiv="keywords"content="keyword1,keyword2,keyword3"> 
  19.     <metahttp-equivmetahttp-equiv="description"content="This is my page"> 
  20.    
  21.   </head> 
  22.      
  23.   <body> 
  24.        
  25.      <s:formactions:formaction="loginAction"method="post"> 
  26.         
  27.         <s:textfieldnames:textfieldname="username"label="用戶名"/><br> 
  28.            
  29.          <s:passwordnames:passwordname="password"label="密碼"/><br> 
  30.             
  31.            <inputtypeinputtype="submit"value="登陸"><br> 
  32.         
  33.      </s:form> 
  34.        
  35.        
  36.   </body> 
  37. </html> 

LoginAction

  1. package xuyan.com.action;   
  2.    
  3. import java.sql.Connection;   
  4. import java.sql.PreparedStatement;   
  5. import java.sql.ResultSet;   
  6. import java.sql.SQLException;   
  7.    
  8. import xuyan.com.model.User;   
  9. import xuyan.com.model.UserDAO;   
  10.    
  11. import com.opensymphony.xwork2.ActionSupport;   
  12. import com.opensymphony.xwork2.ModelDriven;   
  13.    
  14. publicclass LoginAction  extends ActionSupport implements ModelDriven<User>{   
  15.    
  16.        
  17.     /**  
  18.      *   
  19.      */ 
  20.     privatestaticfinallong serialVersionUID = 1L;   
  21.        
  22.      User user=new User();   
  23.    
  24.     public User getUser() {   
  25.         return user;   
  26.     }   
  27.     publicvoid setUser(User user) {   
  28.         this.user = user;   
  29.     }   
  30.     private Connection con=null;   
  31.     private ResultSet rs=null;   
  32.     private PreparedStatement psmt=null;   

  34.        
  35.     /**  
  36.      * 用戶注冊  
  37.      *   
  38.      */ 
  39.         
  40.     public String Login()     
  41.     {   
  42.         System.out.println(user.getUsername()+"1111");   
  43.         System.out.println(user.getPassword()+"1111");             
  44.            
  45.         UserDAO dao=new UserDAO();   
  46.            
  47.         con=dao.getConnection();   
  48.            
  49.         try {   
  50.             psmt =con.prepareStatement("insert into  userinfo (username,password) values (?,?) ");   
  51.             psmt.setString(1, user.getUsername());   
  52.             psmt.setString(2, user.getPassword());   
  53.                
  54.             int a=psmt.executeUpdate();   
  55.                
  56.             if(a>0)   
  57.             {   
  58.                 System.out.println(user.getUsername()+"第2222次");   
  59.                 System.out.println(user.getPassword()+"第2222次");   
  60.                    
  61.                 return  SUCCESS;   
  62.             }   
  63.             else 
  64.             {   
  65.                 return  ERROR;   
  66.             }   
  67.                
  68.         } catch (SQLException e) {   
  69.                
  70.             e.printStackTrace();   
  71.             return  ERROR;   
  72.         }   
  73.            
  74.         finally 
  75.         {   
  76.             if(con != null){   
  77.                 try {   
  78.                     con.close();   
  79.                 } catch (SQLException e) {   
  80.                     e.printStackTrace();   
  81.                 }   
  82.             }   
  83.             if(psmt != null){   
  84.                 try {   
  85.                     psmt.close();   
  86.                 } catch (SQLException e) {   
  87.                     e.printStackTrace();   
  88.                 }   
  89.             }   
  90.             if(rs != null){   
  91.                 try {   
  92.                     rs.close();   
  93.                 } catch (SQLException e) {   
  94.                     e.printStackTrace();   
  95.                 }   
  96.             }   
  97.         }   
  98.            
  99.     }   
  100.              
  101.     @Override 
  102.     public String execute()  {   
  103.            
  104.         System.out.println(user.getUsername()+"1111");   
  105.         System.out.println(user.getPassword()+"1111");   
  106.            
  107.            
  108.         UserDAO dao=new UserDAO();   
  109.            
  110.         con=dao.getConnection();   
  111.            
  112.         try {   
  113.             psmt =con.prepareStatement("select * from userinfo where username=? and password=?");   
  114.             psmt.setString(1, user.getUsername());   
  115.             psmt.setString(2, user.getPassword());   
  116.                
  117.             rs=psmt.executeQuery();   
  118.                
  119.             if(rs.next())   
  120.             {   
  121.                 System.out.println(user.getUsername()+"第2222次");   
  122.                 System.out.println(user.getPassword()+"第2222次");   
  123.                    
  124.                 return  SUCCESS;   
  125.             }   
  126.             else 
  127.             {   
  128.                 return  ERROR;   
  129.             }   
  130.                
  131.         } catch (SQLException e) {   
  132.                
  133.             e.printStackTrace();   
  134.             return  ERROR;   
  135.         }   
  136.            
  137.         finally 
  138.         {   
  139.             if(con != null){   
  140.                 try {   
  141.                     con.close();   
  142.                 } catch (SQLException e) {   
  143.                     e.printStackTrace();   
  144.                 }   
  145.             }   
  146.             if(psmt != null){   
  147.                 try {   
  148.                     psmt.close();   
  149.                 } catch (SQLException e) {   
  150.                     e.printStackTrace();   
  151.                 }   
  152.             }   
  153.             if(rs != null){   
  154.                 try {   
  155.                     rs.close();   
  156.                 } catch (SQLException e) {   
  157.                     e.printStackTrace();   
  158.                 }   
  159.             }   
  160.         }   
  161.            
  162.            
  163.     }   
  164.     public User getModel() {   
  165.         // TODO Auto-generated method stub 
  166.         return user;   
  167.     }   
  168. }   

#p#

Struts.xml

  1. <?xmlversionxmlversion="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.    
  6.      <packagenamepackagename="default"extends="struts-default"> 
  7.          
  8.         <actionnameactionname="loginAction"class="xuyan.com.action.LoginAction"> 
  9.             <resultnameresultname="success">/Success.jsp</result> 
  10.              <resultnameresultname="error">/Login.jsp</result> 
  11.                   
  12.         </action> 
  13.            
  14.            
  15.         <actionnameactionname="regAction"class="xuyan.com.action.LoginAction"method="Login"> 
  16.             <resultnameresultname="success">/RegSuccess.jsp</result> 
  17.              <resultnameresultname="error">/reg.jsp</result> 
  18.                   
  19.         </action> 
  20.            
  21.     </package> 
  22.    
  23.    
  24.    
  25.    
  26. </struts> 

Reg.jsp:

  1. <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 
  2. <%@ taglib uri="/struts-tags" prefix="s" %> 
  3. <% 
  4. String path = request.getContextPath(); 
  5. String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 
  6. %> 
  7.  
  8. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
  9. <html> 
  10.   <head> 
  11.     <base href="<%=basePath%>"> 
  12.      
  13.     <title>My JSP 'reg.jsp' starting page</title> 
  14.      
  15.     <meta http-equiv="pragma" content="no-cache"> 
  16.     <meta http-equiv="cache-control" content="no-cache"> 
  17.     <meta http-equiv="expires" content="0">     
  18.     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
  19.     <meta http-equiv="description" content="This is my page"> 
  20.      
  21.  
  22.   </head> 
  23.    
  24.   <body> 
  25.       <s:form  action="regAction" method="post"> 
  26.       
  27.         <s:textfield  name="username" label="用戶名" /> <br> 
  28.          
  29.          <s:password name="password"  label="密碼"/> <br> 
  30.           
  31.            <input type="submit" value="注冊"> <br> 
  32.       
  33.      </s:form> 
  34.   </body> 
  35. </html> 

注意：   

  1.  <actionnameactionname="loginAction"class="xuyan.com.action.LoginAction"> 
  2.  
  3.  loginAction與login. JSP頁面中的<s:form  action="loginAction" method="post">對應(yīng) 
  4.  
  5.  
  6. <action name="regAction" class="xuyan.com.action.LoginAction" method="Login"> 
  7.  
  8.    regAction與reg.JSP 頁面中的 <s:form  action="regAction" method="post">對應(yīng) 
  9.  
  10.  
  11.    loginAction  類中public String Login()方法必須在Struts.xml中聲明 
  12.  
  13.  <action name="regAction" class="xuyan.com.action.LoginAction" method="Login"> 
  14.          <result name="success">/RegSuccess.jsp</result> 
  15.           <result name="error">/reg.jsp</result> 
  16.              
  17.      </action> 

原文鏈接：http://blog.csdn.net/skyxuyan/article/details/8982776

責(zé)任編輯：陳四芳 來源： CSDN博客
struts2
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