checkuser.java

仓库管理系统,适合各种行业的仓库管理系统

package com.login.action;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.SQLException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.bean.DAO.UserinforDAO;
import com.database.DataSourceFactory;
import com.servlet.AbstractAction;

public class CheckUser extends AbstractAction {

	@Override
	public String process(HttpServletRequest request,
			HttpServletResponse response) throws ServletException, IOException {
		
		String uID=request.getParameter("userID");
		String error=null;
		response.setCharacterEncoding("utf-8");
		if(uID!=null){
			Connection con;
			try {
				con = DataSourceFactory.getDataSource().getConnection();
				UserinforDAO dao=new UserinforDAO(con);
				int userID=Integer.parseInt(uID);
				
				if(dao.getUser(userID)==null){
					error="用户不存在，请重新填写";
					
				}else{
					error="请输入密码";
				}
				con.close();
			}catch(NumberFormatException e){
				error="请输入正确的ID";
			}
			catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			
		}else{
			error="请输入用户ID";
		}
		PrintWriter out=response.getWriter();
			out.print(error);
			
		return null;
	}

}