JDBCUtils

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;
        
        //注册驱动
        try {
            Class.forName("com.mysql.jdbc.Driver");
            //获得连接对象
            String url="jdbc:mysql://localhost:3306/hospital?useUnicode=true&characterEncoding=UTF-8";
            String username="root";
            String password="123456";
            conn=DriverManager.getConnection(url, username, password);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return conn;
    
    }
    
    //释放增删改资源
    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();
            }
        }
    }
    
    //释放查询资源
    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();
            }
        }
    }
}