使用Mybatis框架写学生信息管理系统

学生信息管理系统是一个非常典型的Web应用程序。Mybatis是一种优秀的ORM框架，可以大大提高开发效率。下面是使用Mybatis框架开发学生信息管理系统的基本步骤：

1.设计数据库表结构，创建数据库及表。
2.配置Mybatis环境，包括Mybatis的核心配置文件mybatis-config.xml和映射文件studentMapper.xml。
3.编写JavaBean类Student，用于封装学生信息。
4.编写StudentMapper接口，用于定义对学生信息表的操作方法。
5.编写StudentMapper.xml文件，完成SQL语句的定义和映射。
6.编写DAO层的StudentDAO类，具体实现对学生信息表的操作。
7.编写Service层的StudentService类，实现业务逻辑。
8.编写Controller层的StudentController类，实现对请求的处理和响应。

具体实现细节可以参考以下代码：

1. Student.java

public class Student {
    private int id;
    private String name;
    private int age;
    // 省略get/set方法
}

2. StudentMapper.java

public interface StudentMapper {
    void addStudent(Student student);
    void deleteStudent(int id);
    void updateStudent(Student student);
    Student getStudentById(int id);
    List<Student> getAllStudents();
}

3. StudentMapper.xml

<mapper namespace="com.example.mapper.StudentMapper">
    <insert id="addStudent" parameterType="com.example.bean.Student">
        insert into student (name, age) values (#{name}, #{age})
    </insert>
    <delete id="deleteStudent" parameterType="int">
        delete from student where id = #{id}
    </delete>
    <update id="updateStudent" parameterType="com.example.bean.Student">
        update student set name = #{name}, age = #{age} where id = #{id}
    </update>
    <select id="getStudentById" parameterType="int" resultType="com.example.bean.Student">
        select id, name, age from student where id = #{id}
    </select>
    <select id="getAllStudents" resultType="com.example.bean.Student">
        select id, name, age from student
    </select>
</mapper>

4. StudentDAO.java

public class StudentDAO {
    private SqlSessionFactory sqlSessionFactory;

    public StudentDAO() {
        sqlSessionFactory = MybatisUtil.getSqlSessionFactory();
    }

    public void addStudent(Student student) {
        SqlSession session = sqlSessionFactory.openSession();
        try {
            StudentMapper studentMapper = session.getMapper(StudentMapper.class);
            studentMapper.addStudent(student);
            session.commit();
        } finally {
            session.close();
        }
    }

    public void deleteStudent(int id) {
        SqlSession session = sqlSessionFactory.openSession();
        try {
            StudentMapper studentMapper = session.getMapper(StudentMapper.class);
            studentMapper.deleteStudent(id);
            session.commit();
        } finally {
            session.close();
        }
    }

    public void updateStudent(Student student) {
        SqlSession session = sqlSessionFactory.openSession();
        try {
            StudentMapper studentMapper = session.getMapper(StudentMapper.class);
            studentMapper.updateStudent(student);
            session.commit();
        } finally {
            session.close();
        }
    }

    public Student getStudentById(int id) {
        SqlSession session = sqlSessionFactory.openSession();
        try {
            StudentMapper studentMapper = session.getMapper(StudentMapper.class);
            return studentMapper.getStudentById(id);
        } finally {
            session.close();
        }
    }

    public List<Student> getAllStudents() {
        SqlSession session = sqlSessionFactory.openSession();
        try {
            StudentMapper studentMapper = session.getMapper(StudentMapper.class);
            return studentMapper.getAllStudents();
        } finally {
            session.close();
        }
    }
}

5. StudentService.java

public class StudentService {
    private StudentDAO studentDAO = new StudentDAO();

    public void addStudent(Student student) {
        studentDAO.addStudent(student);
    }

    public void deleteStudent(int id) {
        studentDAO.deleteStudent(id);
    }

    public void updateStudent(Student student) {
        studentDAO.updateStudent(student);
    }

    public Student getStudentById(int id) {
        return studentDAO.getStudentById(id);
    }

    public List<Student> getAllStudents() {
        return studentDAO.getAllStudents();
    }
}

6. StudentController.java

@Controller
@RequestMapping("/student")
public class StudentController {
    @Autowired
    private StudentService studentService;

    @RequestMapping(value = "/add", method = RequestMethod.POST)
    public String addStudent(Student student) {
        studentService.addStudent(student);
        return "redirect:/student/list";
    }

    @RequestMapping(value = "/delete/{id}", method = RequestMethod.GET)
    public String deleteStudent(@PathVariable("id") int id) {
        studentService.deleteStudent(id);
        return "redirect:/student/list";
    }

    @RequestMapping(value = "/update", method = RequestMethod.POST)
    public String updateStudent(Student student) {
        studentService.updateStudent(student);
        return "redirect:/student/list";
    }

    @RequestMapping(value = "/get/{id}", method = RequestMethod.GET)
    public String getStudentById(@PathVariable("id") int id, Model model) {
        Student student = studentService.getStudentById(id);
        model.addAttribute("student", student);
        return "studentDetail";
    }

    @RequestMapping(value = "/list", method = RequestMethod.GET)
    public String getAllStudents(Model model) {
        List<Student> students = studentService.getAllStudents();
        model.addAttribute("students", students);
        return "studentList";
    }
}

以上就是使用Mybatis框架开发学生信息管理系统的基本步骤，希望可以对你有所帮助。