package com.utils;

import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;

public class DBUtilhxr {

    private static String driverName;
    private static String url;
    private static String name;
    private static String password;

    static {

        Properties properties = new Properties();
        // 新建properties文件数据流
        InputStream inputStream = DBUtilhxr.class.getClassLoader().getResourceAsStream("dbconfig.properties");
        try {
            properties.load(inputStream);
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        driverName = (String) properties.get("driverName");
        url = (String) properties.get("url");
        name = (String) properties.get("name");
        password = (String) properties.get("password");
        try {
            //加载JDBC驱动
            Class.forName(driverName);
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    public static Connection getConnection() {
        Connection con = null;
        try {
            // 建立数据库连接
            con = DriverManager.getConnection(url, name, password);
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return con;

    }

    public static void close(Connection connection, Statement statement, ResultSet resultSet) {
        if (resultSet != null) {
            try {
                resultSet.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        if (statement != null) {
            try {
                statement.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        if (connection != null) {
            try {
                connection.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
}