java与mysql

import java.io.IOException;
import java.io.InputStream;
import java.sql.SQLException;
import java.util.Properties;
import org.junit.Test;
import com.mysql.jdbc.Connection;
import com.mysql.jdbc.Driver;


public class DBTest 
{
  /*public static void main(String[] args)
  {


Driver driver = new Driver();

String url = "jdbc:mysql://192.168.52.128:3306/mysqltest";
Properties info = new Properties();
info.put("user", "root");
info.put("password", "123456");
//Connection connection;
try {
//connection = getConnectionInfo();
//System.out.println(connection);
//connection.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}


  }*/
  
  @Test
  public void Test()
  {
 //System.out.println(getConnectionInfo());
 Connection connection = null;
 connection = getConnectionInfo();
 if(connection != null)
 {
 System.out.println(connection);
 try {
 connection.close();
 } catch (SQLException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 }
 else
 {
 System.out.println("获取连接失败");
 }
  }
  
  public Connection getConnectionInfo()
  {
 String driverClass = null;
 String jdbcUrl = null;
 String user = null;
 String password = null;
 //读取配置文件
 InputStream in = getClass().getClassLoader().getResourceAsStream("db.properties");
 Properties pro = new Properties();
 try {
pro.load(in);
 } catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
 }
 driverClass = pro.getProperty("driver");
 jdbcUrl = pro.getProperty("jdbcUrl");
 user = pro.getProperty("user");
 password =  pro.getProperty("password");
 
 //System.out.println("driver="+driverClass+"\njdbcUrl="+jdbcUrl+"\nuser="+user+"\npassword="+password);
 
 Driver driver;
 try {
driver = (Driver) Class.forName(driverClass).newInstance();
 } catch (InstantiationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
 } catch (IllegalAccessException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
 } catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
 }
 //System.out.println(driver);
 
 Properties info = new Properties();
 info.put("user",  user);
 info.put("password", password);
 
 Connection connection = null;
 try {
connection = (Connection)driver.connect(jdbcUrl, info);
 } catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return null;
 }
 return connection;
  }
}