可能是你的classpath配置的问题

cannot resolve symbol 的意思是你的程序里有的变量没定义就用了,也可以理解为解释不了,一般报这中错的时候,后面还会有一句话告诉你是哪个变量cannot resolve

WEB-INF/classes/bookshop/ DBConnection.java
WEB-INF/classes/bookshop/ DBSQLMangae.java
这两个文件位置不对,应该是
WEB-INF/classes/DBConnection.java
WEB-INF/classes/DBSQLMangae.java
经过编译后是
WEB-INF/classes/bookshop/ DBConnection.class
WEB-INF/classes/bookshop/ DBSQLMangae.class

我的环境变量：
CLASSPATH----------.;C:\Program Files\Microsoft SQL Server 2000 Driver for JDBC\lib\msbase.jar;C:\Program Files\Microsoft SQL Server 2000 Driver for JDBC\lib\msutil.jar;C:\Program Files\Microsoft SQL Server 2000 Driver for JDBC\lib\mssqlserver.jar

JAVA_HOME----------D:\program files\JBuilder9\jdk1.4

PATH---------------D:\program files\JBuilder9\jdk1.4\bin
TOMCAT_HOME--------D:\program files\Tomcat 5.0

错误提示：
DBSQLManager.java:15 : connot resolve  symbol
Symbol:class DBConnectionManager
Location:class bookshop.DBSQLManager
DBConnectionManager dcm=new DBConnectionManager();
^
DBSQLManager.java:15 : connot resolve  symbol
Symbol:class DBConnectionManager
Location:class bookshop.DBSQLManager
DBConnectionManager dcm=new DBConnectionManager();
                            ^
DBSQLManager.java:21 : connot resolve  symbol
Symbol:variable isConnect
Location:class bookshop.DBSQLManager
IsConnect=false;
^
3 errors

-----------------------------------------------------------------------------
DBConnectionManager.java

package bookshop; -------------------------------------- (第1行)

/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2005</p>
* <p>Company: </p>
* @author not attributable
* @version 1.0
*/    --------------------------------------------------------- (第10行)

import  java.sql.*;
public  class DBConnectionManager{
  private  String    driverName="com.microsoft.jdbc.sqlserver.SQLServerDriver";
  private  String   url="jdbc:microsoft:sqlserver://BINGER:1433;DatabaseName=test";
  private  String  user="test";
  private  String  password="test";

  public  void  setDriverName(String   newDriverName){
    this.driverName=newDriverName;  ---------------------------------------------- (第20行)
  }
  public String  getDrvieraName(){
    return  driverName;
  }

  public  void  setUrl(String   newUrl){
  this.url=newUrl;
}
public String  getUrl(){
  return  url; ------------------------------------------------ (第30行)
}


public  void  setUser(String   newUser){
  this.user=newUser;
}
public String  getUser(){
  return  user;
}
      ------------------------------------------------------------  (第40行)

public  void  setPassword(String   newPassword){
  this.password=newPassword;
}
public String  getPassword(){
  return  password;
}
public  Connection  getConnection(){
  try
  { -----------------------------------------------------------------  (第50行)  
    Class.forName(driverName);
    return DriverManager.getConnection(url,user,password);
  }
  catch (Exception  e){
    e.printStackTrace();
    return null;
  }
}

}        ----------------------------------------------------------------- (第60行)

DBSQLManager.java

package bookshop; ----------- ----------- ----------- ----------- --(第1行)

import  java.sql.*;
import  bookshop.*;
public  class DBSQLManager{
  protected Connection conn=null;
  protected Statement   stmt=null;
  protected ResultSet  rs=null;
  protected String  sqlStr;
                --------- ----------- ----------- ----------- - (第10行)

public  DBSQLManager(){
    try {
      sqlStr = "";
      DBConnectionManager dcm = new DBConnectionManager();----------------- - (出错行第15行)
      conn = dcm.getConnection();
      stmt = conn.createStatement();
    }
catch  (Exception  e){
        System.out.println(e);   --------------------------------------------- (第20行)
        isConnect=false; ------------------------------------ (出错行第21行)
      }
    }


  public Statement   getStmt(){
    return  stmt;
  }

public Connection getConn(){---------------------------------------------- (第30行)
  return  conn;
}
public  ResultSet getRs(){
  return  rs;
}



public void setSqlStr(String newSqlStr){
  this.sqlStr=newSqlStr;   ------------------------------------------------- (第40行)  
}

public String  getSqlStr(){
  return  sqlStr;
}

public  void  executeQuery()  throws Exception{
  rs=stmt.executeQuery(sqlStr);
}
public  void  executeUpdate()  throws Exception{ ---------------- ---------------- ---(第50行)
  stmt.executeUpdate(sqlStr);
}

public void close() throws SQLException{
  if(stmt!=null){
    stmt.close();
    stmt=null;

  }
  conn.close();      -------------------------------------------------------------------- (第60行)
  conn=null;
}
};

应该是你的两个beans位置的错误，程序没问题，只是说找不到那个类么，环境变量不影响这些的，我没用过jBuilder ，不知道它本身是不是有问题，你按照我说的那个路径放你拿两个程序试试