连接数据库出错问题

首先创建数据库，创建表，然后在工程中写抽象类DBOperator工具,创建测试用例，导入jir包。若运行出错，可能忘记导入jir包；若getConnection()方法出错，可能传入的url,用户或密码不对。源代码：

package cn.edu.hpu.util;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

public class DBOperator {
public final static String driver="com.mysql.jdbc.Driver";
public final static String url="jdbc:mysql://localhost:3306/taobao";
static{
try {
Class.forName(driver);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static Connection getConnection(){
Connection conn=null;
try {
conn=DriverManager.getConnection(url, "root", "173029");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}

}

package cn.edu.hpu.test;

import java.sql.Connection;

import cn.edu.hpu.util.DBOperator;

public class ConTest {
public static void main(String[] args) {
Connection conn=DBOperator.getConnection();
if(conn!=null){
System.out.println("Success!");
}
else{
System.out.println("Error.");
}
}

}