6

JDBC连接数据库操作

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

/**
* JDBC快速入门
*/
public class JDBC {
public static void main(String[] args) throws Exception {

//1. 导入驱动jar包
//2.注册驱动
Class.forName("com.mysql.jdbc.Driver");
//3.获取数据库连接对象
// Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/a", "root", "root");
//4.定义sql语句
// String sql = "update account set balance = 2000 where id = 1";
String sql = "update TEST set name = 2000 where age =1";
//5.获取执行sql的对象 Statement
Statement stmt = conn.createStatement();
//6.执行sql
int count = stmt.executeUpdate(sql);
//7.处理结果
System.out.println(count);
//8.释放资源
stmt.close();
conn.close();

}
}