【mysql jdbc DbUtil()】连接、关闭数据库

package com.java1234.jdbc.util;

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

import com.mysql.jdbc.PreparedStatement;

public class DbUtil {
    
    private static String dbUrl="jdbc:mysql://localhost:3306/db_book";    //"db_book"是数据库名字
    
    private static String dbUserName="root";    //数据库用户名
    
    private static String dbPassword="123456";   //数据库密码
    
    private static String jdbcName="com.mysql.jdbc.Driver";  //驱动
    
//获取连接
public Connection getCon()throws Exception{ Class.forName(jdbcName); Connection con=DriverManager.getConnection(dbUrl, dbUserName, dbPassword); return con; }
//关闭连接
public void close(Statement stmt,Connection con)throws Exception{ if(stmt!=null){ stmt.close(); if(con!=null){ con.close(); } } }
//关闭连接
public void close(PreparedStatement pstmt,Connection con)throws Exception{ if(pstmt!=null){ pstmt.close(); if(con!=null){ con.close(); } } } }
原文地址:https://www.cnblogs.com/CPU-Easy/p/12403667.html