regexituser.java~3~

c++通信编程学习1

package com.j2ee.func.reg;

import com.j2ee.database.*;
public class RegExituser extends J2eedatabase{
    public RegExituser(){
    }
    private String username;
    public void setusername(String username){
        this.username=username;
    }
    public String produceSql(){
        String sql="select id from usergrhy where username='"+username+"'";
        return sql;
    }
    public boolean isExitUser(){
        boolean isExit=false;
        if (getConnetion()) {
            isExit=isExitInDB(produceSql());

        }
        return isExit;
      }
}