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UserLogon.java
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65 lines (56 loc) · 2.15 KB
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package com.servlet;
import java.io.IOException;
import java.sql.SQLException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import com.dao.UserDao;
import com.toolsBean.Change;
import com.valueBean.UserSingle;
public class UserLogon extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
doPost(request,response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
String message="";
String forward=getInitParameter("visitorLogonPage");
HttpSession session=request.getSession();
Object logoner=session.getAttribute("logoner");
if(logoner!=null&&(logoner instanceof UserSingle)) //用户已经登录
message="<li>您已经登录！</li>";
else{ //用户没有登录
String name=Change.toChinese(request.getParameter("userName"));
String pswd=Change.toChinese(request.getParameter("userPswd"));
message=validateLogon(name,pswd); //进行表单验证
if(message.equals("")){ //表单验证成功
try {
UserDao userDao=new UserDao();
logoner=userDao.getLogoner(new Object[]{name,pswd});
if(logoner==null)
message="<li>输入的 <b>用户名</b> 或 <b>密码</b> 不正确！</li>";
else{
message="<li>登录成功！</li>";
session.setAttribute("logoner",logoner);
}
} catch (SQLException e) {
message="<li>登录失败！</li>";
e.printStackTrace();
}
}
}
request.setAttribute("message",message);
RequestDispatcher rd=request.getRequestDispatcher(forward);
rd.forward(request,response);
}
private String validateLogon(String name,String pswd){
String message="";
if(name==null||name.equals(""))
message="<li>请输入 <b>用户名！</b></li>";
if(pswd==null||pswd.equals(""))
message+="<li>请输入 <b>密 码！</b></li>";
return message;
}
}