JDBC利用.properties文件连接数据库

package com.jdbc.utils;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.Properties;

public class JDBCUtilsX {

    private static Properties properties=null;
    static{
        properties=new Properties();
        try {
            properties.load(Thread.currentThread().getContextClassLoader().getResourceAsStream("db.properties"));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     *
     * @return Connection
     */
    public static Connection getConnection(){
        try {
            Class.forName(properties.getProperty("driver"));
            return  DriverManager.getConnection(properties.getProperty("url"),properties.getProperty("user"),properties.getProperty("password"));
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }

    }

 public static void close(AutoCloseable... autoCloseable){

        for(AutoCloseable c:autoCloseable){
            if(c!=null){
                try {
                    c.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
 }


}

　　db.properties文件的配置

url=jdbc:mysql://localhost:3306/test     
user=root
password=123456
driver=com.mysql.jdbc.Driver