ORACLE的JDBC连接工具类

package com.minisay.base.util;

import java.sql.*;

/**
 * @author xiaobu
 * @version JDK1.8.0_171
 * @date on  2018/10/17 17:22
 * @descrption oracle数据库JDBC
 */
public class OJDBCUtils {
    private static final String DRIVER = "oracle.jdbc.driver.OracleDriver";
    private static  final String URL = "jdbc:oracle:thin:@localhost:1521:banjin";
    private static  final String USER = "banjin";
    private static  final String PASSWORD = "banjin2015";


    /**
     * 加载驱动程序
     */
    static {
        try {
            Class.forName(DRIVER);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }

    /**
     * @return 连接对象
     */
    public static Connection getConn() {
        try {
            return DriverManager.getConnection(URL, USER, PASSWORD);
        } catch (SQLException e) {

            e.printStackTrace();
        }
        return null;
    }

    /**
     * 释放资源
     *
     * @param conn 连接对象
     * @param  preparedStatement 预编译对象
     * @param rs 结果集
     */
    public static void colseResource(Connection conn, PreparedStatement preparedStatement, ResultSet rs) {
        closeResultSet(rs);
        closeStatement(preparedStatement);
        closeConnection(conn);
    }

    /**
     * 释放连接 Connection
     *
     * @param conn 连接对象
     */
    public static void closeConnection(Connection conn) {
        if (conn != null) {
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        //等待垃圾回收
        conn = null;
    }

    /**
     * 释放语句执行者 preparedStatement
     *
     * @param preparedStatement 预编译
     */
    public static void closeStatement(PreparedStatement preparedStatement) {
        if (preparedStatement != null) {
            try {
                preparedStatement.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        //等待垃圾回收
        preparedStatement = null;
    }

    /**
     * 释放结果集 ResultSet
     *
     * @param rs
     */
    public static void closeResultSet(ResultSet rs) {
        if (rs != null) {
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        //等待垃圾回收
        rs = null;
    }


}