java学习day23-JDBC-DBUtils(工具类)

JDBC 工具类封装

package cn.tedu;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class DBUtils {

    public static Connection getConnection() throws Exception{
        Class.forName("com.mysql.jdbc.Driver");
        Connection conn = DriverManager.getConnection(
                "jdbc:mysql:///jt_db?characterEncoding=utf-8"
                ,"root",
                "1234"
                );
        return conn;
    }

    public static  void close(ResultSet rs, Statement stat,Connection conn){
        if (rs!=null){
            try {
                rs.close();
            }catch (Exception e){
                e.printStackTrace();
            }finally {
                rs=null;
            }
        }
        if (stat!=null){
            try {
                stat.close();
            }catch (Exception e){
                e.printStackTrace();
            }finally {
                stat=null;
            }
        }
        if (conn!=null){
            try {
                conn.close();
            }catch (Exception e){
                e.printStackTrace();
            }finally {
                conn=null;
            }
        }
    }
}