jdbc java程序连接数据库 案例

package jdbc;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Scanner;

public class Test {

public static void main(String[] args) {
//1.加载驱动
Connection conn = null;
Statement sm = null;
try {
Class.forName("com.mysql.jdbc.Driver");

//2.获得数据库连接
String url = "jdbc:mysql://localhost:3306/epet";

conn = DriverManager.getConnection(url, "root", "root");

//3.发送SQL语句，获得结果
sm = conn.createStatement();
/*Scanner input = new Scanner(System.in);
System.out.println("输入狗的名称：");
String name = input.next();
System.out.println("输入狗的健康值：");
int health = input.nextInt();
System.out.println("输入狗的亲密度：");
int love = input.nextInt();
System.out.println("输入狗的品种：");
String strain = input.next();

String sql = "INSERT INTO dog(NAME,health,love,strain) VALUES ('"+name+"',"+health+","+love+",'"+strain+"')";
*/
String updateSql = "update dog set health = 100 where id=1";

String deleteSql = "delete from dog where id = 1";
//4.处理结果
//int count = sm.executeUpdate(sql);
//int count = sm.executeUpdate(updateSql);
int count = sm.executeUpdate(deleteSql);
if(count > 0) {
//System.out.println("数据插入成功！");
//System.out.println("数据修改成功！");
System.out.println("数据删除成功！");
} else {
//System.out.println("数据插入失败！");
//System.out.println("数据修改失败！");
System.out.println("数据删除失败！");
}

//System.out.println("连接成功！");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
} finally {
//5.释放资源
try {
conn.close();
sm.close();
} catch (SQLException e) {
e.printStackTrace();
}

}

}

}