package druidConnect;

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;

public class JDBCUtils{
    //1.¶¨Òå³ÉÔ±±äÁ¿
    private static DataSource dataSource;

    static {

        try {
            //1.¼ÓÔØÅäÖÃÎļþ
            Properties properties = new Properties();
            properties.load(JDBCUtils.class.getClassLoader().getResourceAsStream("druid.properties"));
            //System.out.println(properties);
            //2.»ñÈ¡DataSource
            dataSource = DruidDataSourceFactory.createDataSource(properties);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    /**
     * »ñÈ¡Á¬½Ó
     */
    public static Connection getConnection() throws Exception {
        return dataSource.getConnection();
    }

    /**
     * ÊÍ·Å×ÊÔ´
     */
    public static void close(Statement stmt, Connection conn){
        close(null, stmt, conn);
    }
    /**
     * ÊÍ·Å×ÊÔ´
     */
    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();
            }
        }
    }

    /**
     * »ñÈ¡Á¬½Ó³Ø
     */
    public static DataSource getDataSource(){
        return dataSource;
    }

    public static void main(String[] args) throws SQLException {
        //getDataSource();
    }
}