java JDBC工具类

package com.oracle.tools;
 
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
 
public class JDBCUtils {
    public static Connection getConn(){
        Connection conn = null;
        try {
            Class.forName("com.mysql.jdbc.Driver");
            String url = "jdbc:mysql://localhost:3306/java0512jie?characterEncoding=utf8";
            String uname = "root";
            String pwd = "123456";
             conn = DriverManager.getConnection(url,uname,pwd);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return conn;
    }
    //增删改释放资源方法
    public static void close(Connection conn,PreparedStatement pst){
        if(pst!=null){
            try {
                pst.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(conn!=null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    //增删改查释放资源方法
    public static void close(Connection conn,PreparedStatement pst,ResultSet rs){
        if (rs!=null) {
            try {
                rs.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(pst!=null){
            try {
                pst.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        if(conn!=null){
            try {
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}