Mybatis框架实现简单的学生管理系统

目录

• ​​使用工具​​
• ​​使用jar包​​
• ​​环境搭建​​
• ​​代码示例​​

• ​​java目录​​

• ​​Student.java​​
• ​​Common.java​​
• ​​IStudentDao.java​​
• ​​IStudentDao.xml​​
• ​​Main.java​​
• ​​StudentServiceImpl.java​​
• ​​IStudentService.java​​
• ​​StuTest.java​​

• ​​resources目录​​

• ​​sqlMapConfig.xml​​

• ​​数据库​​

• ​​item.sql​​

• ​​效果展示​​

• ​​界面​​
• ​​添加功能​​
• ​​查询功能​​
• ​​查询全部功能​​
• ​​删除功能​​
• ​​更改功能​​

使用工具

IDEA2018.2 MySQL5.6 JDK1.8 Tomcat8.5.33

使用jar包

asm-3.3.1.jar
cglib-2.2.2.jar
commons-logging-1.1.1.jar
javassist-3.17.1-GA.jar
log4j-1.2.17.jar
log4j-api-2.0-rc1.jar
log4j-core-2.0-rc1.jar
mybatis-3.2.7.jar
mysql-connector-java-5.1.38-bin.jar
slf4j-api-1.7.5.jar
slf4j-log4j12-1.7.5.jar
jar下载微云链接：​​​https://share.weiyun.com/5uwa3Pq​​

环境搭建

代码示例

java目录

Student.java

/**
 * @author VVcat
 * @date 2019/10/12 10:08
 **/
package com.vvcat.bean;

public class Student {
    private String name;
    private int age;
    private String sex;
    private int id;

    public Student() {
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", sex='" + sex + '\'' +
                ", id=" + id +
                '}';
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }
}

Common.java

package com.vvcat.common;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import java.io.IOException;
import java.io.InputStream;

/**
 * @author VVcat
 * @date 2019/10/12 17:17
 **/
public class Common {
    public SqlSession getSession() throws IOException {
        //1.先获取会话工厂构造器
        SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
        //指定连接配置文件
        InputStream is = Resources.getResourceAsStream("sqlMapConfig.xml");

        //2.根据构造器，构造会话工厂
        SqlSessionFactory factory = builder.build(is);

        //3.开启连接会话
        SqlSession session = factory.openSession();
        return session;
    }

    public void closeSession(SqlSession session){
        session.commit();
        session.close();
    }
}

IStudentDao.java

package com.vvcat.dao;



import com.vvcat.bean.Student;

import java.util.List;

/**
 * @author VVcat
 * @date 2019/10/12 17:14
 **/
public interface IStudentDao {
    //测试增删改查
    int addStu(Student student);
    int delStu(int id);
    int updStu(Student student);
    Student findStuById(int id);
    List<Student> findAll();
}

IStudentDao.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.vvcat.dao.IStudentDao">
    <!--  添加  -->
    <insert id="addStu" parameterType="com.vvcat.bean.Student">
        insert into tb_student(name,sex,age) values (#{name},#{sex},#{age})
    </insert>

    <!--  删除  -->
    <delete id="delStu" parameterType="java.lang.Integer">
        delete from tb_student where id=#{id}
    </delete>

    <!--  修改  -->
    <update id="updStu" parameterType="com.vvcat.bean.Student">
        update tb_student set name=#{name},sex=#{sex},age=#{age} where id=#{id}
    </update>

    <!--  单查询  -->
    <select id="findStuById" parameterType="java.lang.Integer" resultType="com.vvcat.bean.Student">
        select *
        from tb_student
        where id=#{id}
    </select>

    <!--  全查询  -->
    <select id="findAll" resultType="com.vvcat.bean.Student">
        select *
        from tb_student
    </select>


</mapper>

Main.java

/**
 * @author VVcat
 * @date 2019/10/12 17:20
 **/
package com.vvcat.main;


import com.vvcat.bean.Student;
import com.vvcat.service.IStudentService;
import com.vvcat.service.impl.StudentServiceImpl;

import java.io.IOException;
import java.util.List;
import java.util.Scanner;

/**
 * @author VVcat
 * @date 2019/10/12 13:21
 **/
public class Main {
    public static void main(String[] args) throws IOException {
        IStudentService studentService = new StudentServiceImpl();
        boolean flag=true;
        while (flag){
            System.out.println("学生管理系统");
            System.out.println("-----------------------------");
            System.out.println("1.添加学生信息");
            System.out.println("2.删除学生信息");
            System.out.println("3.更改学生信息");
            System.out.println("4.查询学生信息");
            System.out.println("5.查询所有学生信息");
            System.out.println("6.退出系统");
            System.out.println("----------------------------");
            Scanner input = new Scanner(System.in);
            System.out.print("请选择功能：");
            boolean flag2 = true;
            int i = input.nextInt();
            switch (i){
                case 1:
                    while (flag2){
                        Student student = new Student();
                        System.out.print("请输入学生姓名:");
                        String name = input.next();
                        System.out.print("请输入学生性别:");
                        String sex = input.next();
                        System.out.print("请输入学生年龄:");
                        int age = input.nextInt();
                        student.setName(name);
                        student.setSex(sex);
                        student.setAge(age);
                        boolean b = studentService.addStu(student);
                        if (b){
                            System.out.println("添加成功");
                            System.out.println("---------------------");
                            System.out.println("1.退出添加");
                            System.out.println("2.继续添加");
                            System.out.println("请输入您的选择");
                            int i1 = input.nextInt();
                            flag2 = studentService.isNext(i1, flag2);
                        }else {
                            System.out.println("添加失败");
                            System.out.println("---------------------");
                            System.out.println("1.退出添加");
                            System.out.println("2.继续添加");
                            System.out.println("请输入您的选择");
                            int i1 = input.nextInt();
                            flag2 = studentService.isNext(i1, flag2);
                        }
                    }
                    break;
                case 2:
                    while (flag2){
                        System.out.print("请输入要删除学生的ID:");
                        int id = input.nextInt();
                        boolean b = studentService.delStu(id);
                        if (b){
                            System.out.println("删除成功");
                            System.out.println("---------------------");
                            System.out.println("1.退出删除");
                            System.out.println("2.继续删除");
                            System.out.println("请输入您的选择");
                            int i1 = input.nextInt();
                            flag2 = studentService.isNext(i1, flag2);
                        }else {
                            System.out.println("删除失败,没有该用户");
                            System.out.println("---------------------");
                            System.out.println("1.退出删除");
                            System.out.println("2.继续删除");
                            System.out.println("请输入您的选择");
                            int i1 = input.nextInt();
                            flag2 = studentService.isNext(i1, flag2);
                        }
                    }
                    break;
                case 3:
                    while (flag2){
                        Student student = new Student();
                        System.out.print("请输入要更改学生的ID:");
                        int id = input.nextInt();
                        Student studentById = studentService.findStuById(id);
                        if (studentById != null){
                            boolean gengai = true;
                            while (gengai){
                                System.out.println("此用户的信息为：");
                                System.out.println("ID:"+studentById.getId());
                                System.out.println("name:"+studentById.getName());
                                System.out.println("sex:"+studentById.getSex());
                                System.out.println("age:"+studentById.getAge());
                                System.out.println("-------------------------");
                                System.out.println("是否更改该用户");
                                System.out.println("1.更改");
                                System.out.println("2.换一个更改");
                                System.out.println("3.退出更改");
                                int j = input.nextInt();
                                switch (j){
                                    case 1:
                                        System.out.print("请输入学生姓名:");
                                        String name = input.next();
                                        System.out.print("请输入学生性别:");
                                        String sex = input.next();
                                        System.out.print("请输入学生年龄:");
                                        int age = input.nextInt();
                                        student.setId(id);
                                        student.setName(name);
                                        student.setSex(sex);
                                        student.setAge(age);
                                        boolean b = studentService.updStu(student);
                                        if (b){
                                            System.out.println("更改成功");
                                            System.out.println("---------------------");
                                            System.out.println("1.退出更改");
                                            System.out.println("2.继续更改");
                                            System.out.println("请输入您的选择");
                                            int i1 = input.nextInt();
                                            flag2 = studentService.isNext(i1, flag2);
                                            gengai = false;
                                        }else {
                                            System.out.println("更改失败");
                                            System.out.println("---------------------");
                                            System.out.println("1.退出更改");
                                            System.out.println("2.继续更改");
                                            System.out.println("请输入您的选择");
                                            int i1 = input.nextInt();
                                            flag2 = studentService.isNext(i1, flag2);
                                            gengai = false;
                                        }
                                        break;
                                    case 2:
                                        flag2 = true;
                                        gengai = false;
                                        break;
                                    case 3:
                                        flag2 = false;
                                        gengai = false;
                                        break;
                                    default:
                                        gengai = true;
                                        break;
                                }
                            }
                        } else {
                            System.out.println("查无此人");
                            System.out.println("---------------------");
                            System.out.println("1.退出更改");
                            System.out.println("2.继续更改");
                            System.out.println("请输入您的选择");
                            int i1 = input.nextInt();
                            flag2 = studentService.isNext(i1, flag2);
                        }
                    }
                    break;
                case 4:
                    while (flag2){
                        System.out.print("请输入要查询学生的ID:");
                        int id = input.nextInt();
                        Student studentById = studentService.findStuById(id);
                        if (studentById != null){
                            System.out.println("此用户的信息为：");
                            System.out.println("ID:"+studentById.getId());
                            System.out.println("name:"+studentById.getName());
                            System.out.println("sex:"+studentById.getSex());
                            System.out.println("age:"+studentById.getAge());
                            System.out.println("-------------------------");
                            System.out.println("1.退出查询");
                            System.out.println("2.继续查询");
                            System.out.println("请输入您的选择");
                            int i1 = input.nextInt();
                            flag2 = studentService.isNext(i1, flag2);
                        }else {
                            System.out.println("查无此人");
                            System.out.println("---------------------");
                            System.out.println("1.退出查询");
                            System.out.println("2.继续查询");
                            System.out.println("请输入您的选择");
                            int i1 = input.nextInt();
                            flag2 = studentService.isNext(i1, flag2);
                        }
                    }
                    break;
                case 5:
                    while (flag2){
                        List<Student> studentList = studentService.findAll();
                        for (Student student : studentList) {
                            System.out.print("ID:"+student.getId()+",");
                            System.out.print("name:"+student.getName()+",");
                            System.out.print("sex:"+student.getSex()+",");
                            System.out.print("age:"+student.getAge()+",");
                            System.out.println();
                        }
                        System.out.println("-------------------------");
                        System.out.println("1.退出查询");
                        System.out.println("2.更新查询");
                        System.out.println("请输入您的选择");
                        int i1 = input.nextInt();
                        flag2 = studentService.isNext(i1, flag2);
                    }
                    break;
                case 6:
                    flag=false;
                    break;
                default:
                    flag = true;
                    break;
            }
        }
        System.out.println("欢迎下次光临");
    }
}