求救啊，我菜鸟，望大侠们多帮助啊
代码应该没有错数据库也都是对的，还有eclipse是自动跳入debug界面的。Myeclipse是9.0的，jdk，jre是1.6的。在线等高手们啊。


这是Myeclipse的debug结果：ruitest.JDBCsxt at localhost:50215
Thread [main] (Suspended (exception ClassNotFoundException))
URLClassLoader$1.run() line: 200
AccessController.doPrivileged(PrivilegedExceptionAction<T>, AccessControlContext) line: not available [native method]
Launcher$AppClassLoader(URLClassLoader).findClass(String) line: 188
Launcher$AppClassLoader(ClassLoader).loadClass(String, boolean) line: 307
Launcher$AppClassLoader.loadClass(String, boolean) line: 301
Launcher$AppClassLoader(ClassLoader).loadClass(String) line: 252
Launcher$AppClassLoader(ClassLoader).loadClassInternal(String) line: 320
E:\SoftwarePrograms\Myeclipse9\Common\binary\com.sun.java.jdk.win32.x86_1.6.0.013\bin\javaw.exe (2012-6-18 上午09:37:24)



这里是命令行运行结果：Microsoft Windows [版本 6.1.7601]
版权所有 (c) 2009 Microsoft Corporation。保留所有权利。

C:\Users\Administrator>cd C:\Users\Administrator\Desktop\servey

C:\Users\Administrator\Desktop\servey>java TestMysqlConnection
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
  at java.net.URLClassLoader$1.run(Unknown Source)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(Unknown Source)
  at java.lang.ClassLoader.loadClass(Unknown Source)
  at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
  at java.lang.ClassLoader.loadClass(Unknown Source)
  at java.lang.ClassLoader.loadClassInternal(Unknown Source)
  at java.lang.Class.forName0(Native Method)
  at java.lang.Class.forName(Unknown Source)
  at TestMysqlConnection.main(TestMysqlConnection.java:13)

C:\Users\Administrator\Desktop\servey>



下面是程序源代码：

JScript code

package ruitest;
import java.sql.*;

public class TestMysqlConnection {

    /**
     * @param args
     */
    public static void main(String[] args) {
        Connection conn = null;
        Statement stmt = null;
        ResultSet rs = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");

            conn = DriverManager
                    .getConnection("jdbc:mysql://localhost/mydata?user=root&password=mysql");
            stmt = conn.createStatement();
            rs = stmt.executeQuery("select * from dept");
            while (rs.next()) {
                System.out.println(rs.getString("deptno"));
            }

        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException ex) {
            // handle any errors
            System.out.println("SQLException: " + ex.getMessage());
            System.out.println("SQLState: " + ex.getSQLState());
            System.out.println("VendorError: " + ex.getErrorCode());
        } finally {
            try {
                if(rs != null) {
                    rs.close();
                    rs = null;
                }
                if(stmt != null) {
                    stmt.close();
                    stmt = null;
                }
                if(conn != null) {
                    conn.close();
                    conn = null;
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

    }

}

------解决方案--------------------
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver

没有找到mysql 这个jar文件，你放哪里去了~~
------解决方案--------------------
你之前尝试其他jdbc成功了么？我很怀疑是配置不正确，大概意思就是说你得有mysql而且你的java知道它在哪里