登錄頁面使用JSF

Question

任何人都可以幫助我讀取數據庫值並將其傳遞到jsf中的下一頁，如果它成功。

這是我的代碼。

 <!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<ui:composition xmlns="http://www.w3.org/1999/xhtml" 
xmlns:ui="http://java.sun.com/jsf/facelets" 
xmlns:f="http://java.sun.com/jsf/core" 
xmlns:h="http://java.sun.com/jsf/html" 
template="/templates/template.xhtml" 
xmlns:rich="http://richfaces.org/rich"> 

<ui:define name="body"> 
    <h:form> 

     <rich:panel header="Employee Log In Page" style="width: 315px"> 
      <h:panelGrid columns="2"> 

       <h:outputText value="EmployeeId: " /> 

       <h:inputText id="employeeId" value=""> 

        <f:validateLength minimum="30" maximum="30" /> 

       </h:inputText> 

       <h:outputText id= "password" value="PassWord: " /> 

       <h:inputText value=""> 

        <f:validateLength minimum="15" maximum="15" /> 
       </h:inputText> 
       <h:commandButton action="#{ }" value="Log In" /> 
      </h:panelGrid> 
     </rich:panel> 
    </h:form> 
</ui:define> 
</ui:composition> 

Connectivity.java

import java.sql.DriverManager; 
    import java.sql.ResultSet; 
    import java.util.ArrayList; 

    import antlr.collections.List; 

    import com.model.UserDetails; 
import com.mysql.jdbc.Connection; 
    import com.mysql.jdbc.Statement; 


public class Connectivity { 

public static void main(String[] argv) { 

    System.out.println("-------- MySQL JDBC Connection Testing ------------"); 

int i=0; 

Connection con ; 
Statement ps; 
ResultSet rs; 



    try 
    { 
    Class.forName("com.mysql.jdbc.Driver"); 
    con = (Connection) DriverManager.getConnection("jdbc:mysql://localhost:3306/LeaveApp", 
"root","root"); 

    ps = (Statement) con.createStatement(); 
    rs = ps.executeQuery("select * from Login"); 
    while(rs.next()){ 
    System.out.println(rs.getString(1)); 
    System.out.println(rs.getString(2)); 
    System.out.println(rs.getString(3)); 

    i++; 

    } 

    } 
    catch (Exception e) 
    { 
    System.out.println("Error Data : " + e.getMessage()); 
    } 
} 
} 

UserDetails.java

 package com.model; 

     public class UserDetails { 
public int login_id; 
public String user_name; 
public String user_password; 
public int getLogin_id() { 
    return login_id; 
} 
public void setLogin_id(int login_id) { 
    this.login_id = login_id; 
} 
public String getUser_name() { 
    return user_name; 
} 
public void setUser_name(String user_name) { 
    this.user_name = user_name; 
} 
public String getUser_password() { 
    return user_password; 
} 
public void setUser_password(String user_password) { 
    this.user_password = user_password; 
} 


} 

我需要驗證的登錄page.How做到這一點。

Answer 1

設定值和視圖中的操作方法：

<h:outputText value="EmployeeId: " /> 
<h:inputText id="employeeId" value="#{userDetails.employeeId}"> 
    <f:validateLength minimum="30" maximum="30" /> 
</h:inputText> 
<h:outputText id="password" value="PassWord: " /> 
<h:inputText value="#{userDetails.password}"> 
    <f:validateLength minimum="15" maximum="15" /> 
</h:inputText> 
<h:commandButton action="#{userDetails.login}" value="Log In" /> 

，並宣佈這些領域和支撐bean定義這個方法：

private Integer employeeId; 
private String password; 

public String login() {  
    String result = null; 
    boolean isValidUser = userDao.login(employeeId, password); // verification user's data in db 
    if (isValidUser) { 
     result = "success"; 
    } else { 
     result = "fail"; 
    } 
    return result; 
} 

public Integer getImployeeId() { 
    return employeeId; 
} 

public void setEmployeeId(Integer employeeId) { 
    this.employeeId = employeeId; 
} 

public String getPassword() { 
    return password; 
} 

public void setPassword(String password) { 
    this.password = password; 
}