关于javabean的疑问

Question

我做了一个javabean的程序。谁知在编译过程中出现了很多错误，经过不断的更改总算错误大大的减少但还存在一个错误：
E:\>javac W:\business\WEB-INF\classes\org\pan\web\baiwan.java
W:\business\WEB-INF\classes\org\pan\web\baiwan.java:125: incompatible types
found   : boolean
required: java.sql.ResultSet
                          rs=stmt.execute(sqlStr);
                                         ^
1 error
我的一部分程序是：
package org.pan.web;import java.sql.*;
import org.pan.util.*;
import javax.servlet.http.HttpServletRequest;
import java.sql.ResultSet;
public class baiwan {
        private String UserName1;
        private String Password1;
        private String UserName2;
        private String Password2;
        private boolean IsTimeUp=false;
        private String IsRight="no";  
        private javax.servlet.http.HttpServletRequest Request;
        private int BookId;
        private String BookName;
        private String BookContent;
        private float Price;
        private String SubmitTime;
        private String CheckTime;
        private String Email;
        private String IsPayOff;
        String mysqldriver="org.gjt.mm.mysql.Driver";
        String url="jdbc:mysql://localhost:3306/business?user=wyn63559956;password=19861004";
        Connection con;
        Statement stmt;
        ResultSet rs;
        
        
        public baiwan() throws Exception{
               
               try{
                    Class.forName(mysqldriver);
                    con=DriverManager.getConnection(url,"","");
                    stmt=con.createStatement();
                  }
               catch(Exception e)
               { 
                  System.out.println(e);
                }
               UserName1="";
               Password1="";
               UserName2="";
               Password2="";
               SubmitTime="";
               BookId=0;
               BookName="";
               BookContent="";
               Price=0;
               SubmitTime="";
               CheckTime="";
               Email="";
        }
     
        public String getUserName1() throws Exception{                         //这是用户的函数
                return UserName1;
        }
        public void setUsername1(String newusername) {
                UserName1 = newusername;
    }     public String getPassword1() throws Exception{
        return Password1;
    }
    public void setPassword1(String newpasswd) {
        Password1 = newpasswd;
        }
        public String getUserName2() {
                return UserName2;
        }
        public void setUserName2(String newusername){
                UserName2=newusername;
        }
        public String getPassword2() {
                return Password2;
        }
        public void setPassword2(String newpasswd){
                Password2=newpasswd;
        }
        public String getSubmitTime() {
                return SubmitTime;
        }
        public String getIsRight() throws Exception{
                return IsRight;
        }
        public String getSql1(){
                String sqlStr="select * from baiwanhezi where UserName1='"+getUserName1()+ " 'and Password1='"+getPassword1()+" '";
                return sqlStr;
        }
        public boolean checkUser1() throws Exception{                
                boolean flag=false;
                rs=stmt.executeQuery(getSql1());
                if(rs.next())
                flag=true;
                rs.close();
                return flag;
        } 
        public String getSql2(){
                String sqlStr="select * from My_Users where UserName='"+getUserName2()+ " 'and PassWord='"+getPassword2()+" '";
                return sqlStr;
        }             
        public boolean checkUser2() throws Exception{     
                boolean flag=false;
                rs=stmt.executeQuery(getSql2());
                if(rs.next())
                flag=true;
                rs.close();
                return flag;
        }
     
        public boolean haveRight() throws Exception {
              
                 String sqlStr;
                 boolean flag=false;
                 try
                 {
                  sqlStr = "update baiwanhezi set"; 
                  sqlStr = sqlStr + "UserName1 = '" + getUserName2() + "',"; 
          sqlStr = sqlStr + "Password1 = '" + getPassword2() + "',";
          sqlStr = sqlStr + "SubmitTime = '" + getSubmitTime() + "'";
          rs=stmt.execute(sqlStr);
                  }       
                  catch(SQLException e)
                  {
                     System.out.println(e);   
                     return flag;
                  }
                  sqlStr = "delete UserName2,Password2 from baiwanhezi";
                  try
                  {
                     stmt.execute(sqlStr);
                   }
                   catch(SQLException e)
                   {
                     System.out.println(e);
                     rs.close();
                     return flag;
                   } 
                   rs.close();
                   flag=true;
                   return flag;
        } 
 请各位指教！！！

Answer 1

是啊
另一个帖子里已经解答了