java 连接 oracle报错。“java.lang.Error”,该怎么解决_J2SE

java 连接 oracle报错。“java.lang.Error”
不知道为什么，运行时提示这里有错误，搞了半天也搞不好，
//得到连接
Connection ct=DriverManager.getConnection("jdbc:odbc:testsp","scott","123");

运行时提示：
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
The method getConnection(String, String, String) is undefined for the type DriverManager

package com.sp;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;

public class testora {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub

try {

//加载驱动
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
//得到连接
Connection ct=DriverManager.getConnection("jdbc:odbc:testsp","scott","123");

//从下面开始和sql server 一模一样
Statement sm=ct.createStatement();

ResultSet rs=sm.executeQuery("select * from emp");

while(rs.next()){

//用户名
System.out.println("用户名 : "+rs.getString(1));
}

}catch (Exception e){

e.printStackTrace();
//TODO: handle exception
}
}

}

------解决方案--------------------
import java.sql.DriverManager ;

没有把类引用进来，难道你能编译过去不报错？

------解决方案--------------------

Java code

package com.sp;import java.sql.Connection;import java.sql.ResultSet;import java.sql.Statement;import java.sql.DriverManager ;public class TestOra {/*** @param args*/public static void main(String[] args) {// TODO Auto-generated method stubtry {//加载驱动Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");//得到连接Connection ct=DriverManager.getConnection("jdbc:odbc:testsp","scott","123");  //从下面开始和sql server 一模一样Statement sm=ct.createStatement();ResultSet rs=sm.executeQuery("select * from emp");while(rs.next()){//用户名System.out.println("用户名 : "+rs.getString(1));}}catch (Exception e){e.printStackTrace();//TODO: handle exception}}}
------解决方案--------------------
我连接成功的例子：Java code<%@ page contentType="text/html;charset=GB2312"%><%@ import="java.sql.*"%><html><body><%Connection con =null;Statement sql = null;ResultSet rs = null;try{    Class.forName("oracle.jdbc.driver.OracleDriver");}catch(ClassNotFoundException e){}try{    con = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:","scott","tiger");    sql = con.createStatement();    rs = sql.executeQuery("select * from emp");    out.print("<table border>");    out.print("<tr>");        out.print("<th width=100>"+"empno");        out.print("<th width=100>"+"ename");    out.print("</tr>");    while(rs.next()){        out.print("<tr>");        int n = rs.getInt(1);        out.print("<td>" + n + "</td>");        int e = rs.getInt(2);        out.print("<td>" + e + "</td>");        out.print("<tr>");    }    out.print("</table>");    con.close();}catch(SQLException e){    out.print(" "+e);}%></body></html>
------解决方案--------------------
Java code<%@ page contentType="text/html;charset=GB2312"%><%@ import="java.sql.*"%><html><body><%Connection con =null;Statement sql = null;ResultSet rs = null;try{    Class.forName("oracle.jdbc.driver.OracleDriver");}catch(ClassNotFoundException e){}try{    con = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:这里是数据库名字","scott","tiger");    sql = con.createStatement();    rs = sql.executeQuery("select * from emp");    out.print("<table border>");    out.print("<tr>");        out.print("<th width=100>"+"empno");        out.print("<th width=100>"+"ename");    out.print("</tr>");    while(rs.next()){        out.print("<tr>");        int n = rs.getInt(1);        out.print("<td>" + n + "</td>");        int e = rs.getInt(2);        out.print("<td>" + e + "</td>");        out.print("<tr>");    }    out.print("</table>");    con.close();}catch(SQLException e){    out.print(" "+e);}%></body></html>