Druid数据库连接池工具类

package cn.itcast.utils;

import com.alibaba.druid.pool.DruidDataSourceFactory;

import javax.sql.DataSource;
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

/**
 * @author newcityman
 * @date 2019/8/16 - 23:56
 * Druid 的工具类
 */
public class JDBCUtils {
    //    1、定义成员变量DataSource
    private static DataSource ds;

    static {
        try {
//        2、加载配置文件
            Properties pro = new Properties();
            pro.load(JDBCUtils.class.getClassLoader().getResourceAsStream("druid.properties"));
//        3、获取连接对象Datasource
           ds = DruidDataSourceFactory.createDataSource(pro);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /*
    * 获取连接的方法
    * */
    public static Connection getConnetion() throws SQLException {
        return ds.getConnection();
    }

    /*
    * 释放资源
    * */
    public static void  close(Statement stmt,Connection conn){
       /* if(stmt!=null){
            try {
                stmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if(conn!=null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }*/
       close(null,stmt,conn);
    }

    /*
     * 释放资源
     * */
    public static void  close(ResultSet rs,Statement stmt, Connection conn){
        if(rs!=null){
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if(stmt!=null){
            try {
                stmt.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

        if(conn!=null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }

    }
    
    /*
    * 获取连接池方法
    * */
    public static DataSource getDataSource(){
        return ds;
    }

}