Java学生管理系统 数据库版

Java学生管理系统 数据库版

CREATE DATABASE schooljava;

USE schooljava;

CREATE TABLE student (
id INT(11),
name VARCHAR(25),
tel INT(11),
sex VARCHAR(6)
);

DESC student;

INSERT INTO student VALUES
(1,'张三',1234567890,'男'),
(2,'张四',1234567890,'男'),
(3,'张五',1234567890,'男'),
(4,'张六',1234567890,'男'),
(5,'张期',1234567890,'男'),
(6,'张八',1234567890,'女'),
(7,'张久',1234567890,'女'),
(8,'张氏',1234567890,'女'),
(9,'张一',1234567890,'男'),
(10,'张二',1234567890,'男');

package Seventeenth;

import com.mysql.cj.jdbc.Driver;

import java.sql.*;

public class schooljava {
    Connection connection;

    public static void main(String[] args) throws SQLException {
        schooljava schooljava=new schooljava();
        schooljava.getConnection();
        schooljava.selectAll();
        schooljava.add(11,"张尤",1824563490,"男");
        schooljava.add(12,"张代",1394237890,"女");
        schooljava.add(13,"张伊",1893153435,"男");
        schooljava.select182();
        schooljava.xiugai();
        schooljava.chanan();
        schooljava.dsg();
        schooljava.select139();
        schooljava.sc();
        schooljava.chanv();
        schooljava.selectAll();
    }
    public void add(int id, String name,int tel,String sex) throws SQLException {
        PreparedStatement preparedStatement=connection.prepareStatement("insert into student values(?,?,?,?);");
        preparedStatement.setInt(1, id);
        preparedStatement.setString(2, name);
        preparedStatement.setInt(3,tel);
        preparedStatement.setString(4,sex);
        preparedStatement.executeUpdate();
    }
    public void getConnection()throws SQLException {
        DriverManager.registerDriver(new Driver());//第一步：注册驱动
        connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/schooljava?useUnicode=true&characterEncoding=UTF-8", "root", "1234");
//第二步：获取连接
    }

    public void selectAll() throws SQLException {		//查询课程表所有数据
        PreparedStatement preparedStatement=connection.prepareStatement("select*from  student");//第三步：获取statement对象
        ResultSet resultSet=preparedStatement.executeQuery();//第四步：执行SQL语句返回结果集
        while(resultSet.next()){
            System.out.print(resultSet.getInt("id"));
            System.out.print(resultSet.getString("name"));
            System.out.print(resultSet.getInt("tel"));
            System.out.println(resultSet.getString("sex"));//第五步：遍历结果集

        }resultSet.close();
        preparedStatement.close();}
    public void select182() throws SQLException {
        PreparedStatement preparedStatement=connection.prepareStatement("select*from  student where tel like '182%'");
        ResultSet resultSet=preparedStatement.executeQuery();
        while(resultSet.next()){
            System.out.print(resultSet.getInt("id"));
            System.out.print(resultSet.getString("name"));
            System.out.print(resultSet.getInt("tel"));
            System.out.println(resultSet.getString("sex"));}

    }

    public void xiugai() throws SQLException {
        PreparedStatement preparedStatement=connection.prepareStatement("update student set tel=1312423530 where id=5");
        preparedStatement.executeUpdate( );

    }
    public void chanan() throws SQLException {
        PreparedStatement preparedStatement=connection.prepareStatement("select*from  student where sex='男'");
        ResultSet resultSet=preparedStatement.executeQuery();
        while(resultSet.next()){
            System.out.print(resultSet.getInt("id"));
            System.out.print(resultSet.getString("name"));
            System.out.print(resultSet.getInt("tel"));
            System.out.println(resultSet.getString("sex"));}
    }
    public void dsg() throws SQLException {
        PreparedStatement preparedStatement=connection.prepareStatement("update student set name='大帅哥' where id=10");
        preparedStatement.executeUpdate( );

    }
    public void select139() throws SQLException {
        PreparedStatement preparedStatement=connection.prepareStatement("select*from  student where tel like '139%'");
        ResultSet resultSet=preparedStatement.executeQuery();
        while(resultSet.next()){
            System.out.print(resultSet.getInt("id"));
            System.out.print(resultSet.getString("name"));
            System.out.print(resultSet.getInt("tel"));
            System.out.println(resultSet.getString("sex"));}
    }
    public void sc() throws SQLException {
        PreparedStatement preparedStatement=connection.prepareStatement("delete from student where id=3");
        preparedStatement.executeUpdate( );

    }
    public void chanv() throws SQLException {
        PreparedStatement preparedStatement=connection.prepareStatement("select*from  student where sex='女'");
        ResultSet resultSet=preparedStatement.executeQuery();
        while(resultSet.next()){
            System.out.print(resultSet.getInt("id"));
            System.out.print(resultSet.getString("name"));
            System.out.print(resultSet.getInt("tel"));
            System.out.println(resultSet.getString("sex"));}}

}