J2EE學習筆記——Struts2多方法實現

作者：兔子俠客 2013-05-28 11:29:19

當Web容器收到請求（HttpServletRequest）它將請求傳遞給一個標準的的過濾鏈包括流程（ActionContextCleanUp）過濾器，然后經過Other filters...

實現登陸驗證和注冊驗證在一個 LoginAction 類中：

Login.jsp:

<%@ page language="java"import="java.util.*"pageEncoding="utf-8"%> 
<%@ taglib uri="/struts-tags"prefix="s" %> 
   
<%   
String path = request.getContextPath();   
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";   
%> 
   
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html> 
  <head> 
    <basehrefbasehref="<%=basePath%>"> 
       
    <title>Login</title> 
    <metahttp-equivmetahttp-equiv="pragma"content="no-cache"> 
    <metahttp-equivmetahttp-equiv="cache-control"content="no-cache"> 
    <metahttp-equivmetahttp-equiv="expires"content="0"> 
    <metahttp-equivmetahttp-equiv="keywords"content="keyword1,keyword2,keyword3"> 
    <metahttp-equivmetahttp-equiv="description"content="This is my page"> 
   
  </head> 
     
  <body> 
       
     <s:formactions:formaction="loginAction"method="post"> 
        
        <s:textfieldnames:textfieldname="username"label="用戶名"/><br> 
           
         <s:passwordnames:passwordname="password"label="密碼"/><br> 
            
           <inputtypeinputtype="submit"value="登陸"><br> 
        
     </s:form> 
       
       
  </body> 
</html>

LoginAction

[java] view plain copy

package xuyan.com.action;   
   
import java.sql.Connection;   
import java.sql.PreparedStatement;   
import java.sql.ResultSet;   
import java.sql.SQLException;   
   
import xuyan.com.model.User;   
import xuyan.com.model.UserDAO;   
   
import com.opensymphony.xwork2.ActionSupport;   
import com.opensymphony.xwork2.ModelDriven;   
   
publicclass LoginAction  extends ActionSupport implements ModelDriven<User>{   
   
       
    /**  
     *   
     */ 
    privatestaticfinallong serialVersionUID = 1L;   
       
     User user=new User();   
   
    public User getUser() {   
        return user;   
    }   
    publicvoid setUser(User user) {   
        this.user = user;   
    }   
    private Connection con=null;   
    private ResultSet rs=null;   
    private PreparedStatement psmt=null;   

       
    /**  
     * 用戶注冊  
     *   
     */ 
        
    public String Login()     
    {   
        System.out.println(user.getUsername()+"1111");   
        System.out.println(user.getPassword()+"1111");             
           
        UserDAO dao=new UserDAO();   
           
        con=dao.getConnection();   
           
        try {   
            psmt =con.prepareStatement("insert into  userinfo (username,password) values (?,?) ");   
            psmt.setString(1, user.getUsername());   
            psmt.setString(2, user.getPassword());   
               
            int a=psmt.executeUpdate();   
               
            if(a>0)   
            {   
                System.out.println(user.getUsername()+"第2222次");   
                System.out.println(user.getPassword()+"第2222次");   
                   
                return  SUCCESS;   
            }   
            else 
            {   
                return  ERROR;   
            }   
               
        } catch (SQLException e) {   
               
            e.printStackTrace();   
            return  ERROR;   
        }   
           
        finally 
        {   
            if(con != null){   
                try {   
                    con.close();   
                } catch (SQLException e) {   
                    e.printStackTrace();   
                }   
            }   
            if(psmt != null){   
                try {   
                    psmt.close();   
                } catch (SQLException e) {   
                    e.printStackTrace();   
                }   
            }   
            if(rs != null){   
                try {   
                    rs.close();   
                } catch (SQLException e) {   
                    e.printStackTrace();   
                }   
            }   
        }   
           
    }   
             
    @Override 
    public String execute()  {   
           
        System.out.println(user.getUsername()+"1111");   
        System.out.println(user.getPassword()+"1111");   
           
           
        UserDAO dao=new UserDAO();   
           
        con=dao.getConnection();   
           
        try {   
            psmt =con.prepareStatement("select * from userinfo where username=? and password=?");   
            psmt.setString(1, user.getUsername());   
            psmt.setString(2, user.getPassword());   
               
            rs=psmt.executeQuery();   
               
            if(rs.next())   
            {   
                System.out.println(user.getUsername()+"第2222次");   
                System.out.println(user.getPassword()+"第2222次");   
                   
                return  SUCCESS;   
            }   
            else 
            {   
                return  ERROR;   
            }   
               
        } catch (SQLException e) {   
               
            e.printStackTrace();   
            return  ERROR;   
        }   
           
        finally 
        {   
            if(con != null){   
                try {   
                    con.close();   
                } catch (SQLException e) {   
                    e.printStackTrace();   
                }   
            }   
            if(psmt != null){   
                try {   
                    psmt.close();   
                } catch (SQLException e) {   
                    e.printStackTrace();   
                }   
            }   
            if(rs != null){   
                try {   
                    rs.close();   
                } catch (SQLException e) {   
                    e.printStackTrace();   
                }   
            }   
        }   
           
           
    }   
    public User getModel() {   
        // TODO Auto-generated method stub 
        return user;   
    }   
}

#p#

Struts.xml

[html] view plain copy

<?xmlversionxmlversion="1.0"encoding="UTF-8"?> 
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"> 
<struts> 
   
   
     <packagenamepackagename="default"extends="struts-default"> 
         
        <actionnameactionname="loginAction"class="xuyan.com.action.LoginAction"> 
            <resultnameresultname="success">/Success.jsp</result> 
             <resultnameresultname="error">/Login.jsp</result> 
                  
        </action> 
           
           
        <actionnameactionname="regAction"class="xuyan.com.action.LoginAction"method="Login"> 
            <resultnameresultname="success">/RegSuccess.jsp</result> 
             <resultnameresultname="error">/reg.jsp</result> 
                  
        </action> 
           
    </package> 
   
   
   
   
</struts>

Reg.jsp:

[html] view plain copy

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 
<%@ taglib uri="/struts-tags" prefix="s" %> 
<% 
String path = request.getContextPath(); 
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 
%> 
 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
<html> 
  <head> 
    <base href="<%=basePath%>"> 
     
    <title>My JSP 'reg.jsp' starting page</title> 
     
    <meta http-equiv="pragma" content="no-cache"> 
    <meta http-equiv="cache-control" content="no-cache"> 
    <meta http-equiv="expires" content="0">     
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
    <meta http-equiv="description" content="This is my page"> 
     
 
  </head> 
   
  <body> 
      <s:form  action="regAction" method="post"> 
      
        <s:textfield  name="username" label="用戶名" /> <br> 
         
         <s:password name="password"  label="密碼"/> <br> 
          
           <input type="submit" value="注冊"> <br> 
      
     </s:form> 
  </body> 
</html>

注意：

[html] view plain copy

 <actionnameactionname="loginAction"class="xuyan.com.action.LoginAction"> 
 
 loginAction與login. JSP頁面中的<s:form  action="loginAction" method="post">對應 
 
 
<action name="regAction" class="xuyan.com.action.LoginAction" method="Login"> 
 
   regAction與reg.JSP 頁面中的 <s:form  action="regAction" method="post">對應 
 
 
   loginAction  類中public String Login()方法必須在Struts.xml中聲明 
 
 <action name="regAction" class="xuyan.com.action.LoginAction" method="Login"> 
         <result name="success">/RegSuccess.jsp</result> 
          <result name="error">/reg.jsp</result> 
             
     </action>

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

責任編輯：陳四芳來源： CSDN博客

struts2