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JDBC介绍
2022-07-06 09:25:00 【手可摘鑫晨】
1,JDBC概念
Java Database Connectivity(JDBC):Java访问数据库的解决方案。
JDBC定义了一套接口,即访问数据库的通用API,不同数据库厂商根据各自数据库的特点去实现这些接口。
JDBC希望用相同的方式访问不同的数据库,让具体的数据库操作与数据库厂商实现无关,从而在
不同数据库之间轻易的进行切换。
2,JDBC相关类接口
Class.forName("com.mysql.cj.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/dayone?serverTimezone=GMT";
String user = "root";
String pwd = "123456";
Connection conn = DriverManager.getConnection(url, user, pwd);
String sql = "insert into student(sname,birthday,ssex,classid) values('张三','2022-1-1','男','100')";
Statement statm = conn.createStatement();
int ret = statm.executeUpdate(sql); //执行DML语句(添加,删除,修改),返回值int
//ResultSet rs = stmt.executeQuery(sql); //执行DQL语句(查询),返回值ResultSet
if(ret > 0) {
System.out.println("执行成功了");
}else {
System.out.println("执行失败了");
}
(5)释放资源
statm.close();
conn.close();
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