编译java文件的时候，加载另外一个文件夹的class出错，怎么解决啊，望大家赐教。。。谢过

[clm0010]

WEB-INF\classes\gxu\test\db\DbConnection.java
-----------------------------------
package gxu.test.db;


import gxu.test.db.Constants;

import java.sql.*;
import javax.sql.DataSource;
import javax.naming.*;


public class DbConnection{
public static Connection getConnectionPool() throws Exception{


String uri=Constants.SQLSource_KEY;
DataSource ds=null;
Connection con=null;

Context context=new InitialContext();
try{
ds=(DataSource)context.lookup(uri);

con=ds.getConnection();
}
catch(SQLException ex)
{ throw ex;}
return con;
}


///JDBC-4

public static Connection getConnection()throws Exception{
try{
String strCon="com.microsoft.jdbc.sqlserver.SQLServerDriver";
String uri="jdbc:microsoft:sqlserver://127.0.0.1:1433;databaseName=exam_dianzi";
Class.forName(strCon);
return DriverManager.getConnection(uri,"abu","5211314");
}catch(Exception ex){
throw ex;
}
}

}


WEB-INF\classes\gxu\test\common\Constants.java
-----------------------------------
package gxu.test.common;
/**
* 集中定义常量
* @author MG.abuRX
*
*/

public class Constants{


public static final String SQLSource_KEY="java:comp/env/jdbc/exam_dianzi";

public static final String Register_errormessage="个人资料输入有错，请输入您的正确信息！";
public static final String Register_failuremessage1="注册失败!";
public static final String Register_failuremessage2="该用户名已经注册！";
public static final String Register_failuremessage3="该身份证已经注册过了！";
public static final String Register_successmessage="注册成功！";
public static final String Login_successmessage="登录成功！";
public static final String Department_searchfailure="查找不到您所输入的学校的代码，请确认学校名称再次输入，或者报告管理员：";
public static final String Department_searcherror="数据查找失败，请报告管理员：";

public static final String SQL_Rigister_sel1="select id from TEST_USERS where usercode=?";
public static final String SQL_Rigister_sel2="select id from TEST_USERS where pin=?";
public static final String SQL_Rigister_add="insert into TEST_USERS values(?,?,?,?,?,?,?,?,?,?,?,?,getDate(),null,null,null,null,0,0,getDate())";
public static final String SQL_Department_add="insert into TEST_DEPARTMENTS values (?)";
public static final String SQL_Department_del="delete from TEST_DEPARTMENTS where DEPARTMENTID=?";
public static final String SQL_Department_sel1="select * from TEST_DEPARTMENTS where DEPARTMENTNAME like ?";
public static final String SQL_Department_sel2="select * from TEST_DEPARTMENTS where DEPARTMENTNAME=?";
public static final String SQL_Department_sel3="select * from TEST_DEPARTMENTS";
public static final String SQL_Department_upd="update TEST_DEPARTMENTS set DEPARTMENTNAME=? where DEPARTMENTID=?";
public static final String SQL_Admin_sel="select * from TEST_ADMINS where adminname=?";
public static final String SQL_Login_sel="select * from TEST_USERS where usercode=?";
public static final String SQL_Login_upd="update TEST_USERS set LASTLOGINTIME=?, LASTLOGINTIME2=getDate() where USERCODE=?";
public static final String SQL_Manage_sel_all="select * from TEST_USERS";
public static final String SQL_Manage_sel_one="select * from TEST_USERS where id=?";
public static final String SQL_Manage_del="delete from t_TEST_USERS where id=?";
public static final String SQL_Manage_upd="update test_users set pwd=?,address=?,departmentid=?,degree=?,email=?,phone=? where usercode=?";
public static final String SQL_User_sel1="select pquestion from TEST_Users where usercode=?";
public static final String SQL_User_sel2="select * from TEST_Users where usercode=?";
public static final String SQL_User_sel3="select USERCODE,FSCORE,FTESTTIME, SSCORE,STESTTIME from TEST_USERS where USERCODE=?";


}


我在CMD运行 javac DbConnection.java 命令的时候报错：

DbConnection.java:4: 找不到符号
符号： 类 Constants
位置： 软件包 gxu.test.db
import gxu.test.db.Constants;
^
DbConnection.java:15: 找不到符号
符号： 变量 Constants
位置： 类 gxu.test.db.DbConnection
String uri=Constants.SQLSource_KEY;

该怎么解决，这个文件编译不过来，数据库就不能连接了。

[jobs002]

看不懂,你的注释太多了

[jobs002]

import gxu.test.db.common.*;

[clm0010]

更正，DbConnection.java 中前面的部分代码是

package gxu.test.common;
import gxu.test.common.Constants;

cmd 编译报错是
DbConnection.java:4: 找不到符号
符号： 类 Constants
位置： 软件包 gxu.test.common
import gxu.test.common.Constants;
^
DbConnection.java:15: 找不到符号
符号： 变量 Constants
位置： 类 gxu.test.common.DbConnection
String uri=Constants.SQLSource_KEY;
^
2 错误

---------
(就算我把两个文件放到一个文件夹里面，一样出错。晕了)

[bush_80_0]

jb，eclipse，命令行太秃了，也南用

[clm0010]

其实代码并不多，主要意思是 import gxu.test.common.Constants; 这句出错，导致找不到变量 Constants。

根据jobs002 修改为 import gxu.test.db.common.*; ,第二个错误还是找不到，即找不到变量 Constants