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整合示例

1、依赖

pom.xml

   
       
    
     org.mybatis
        
    
     mybatis
        
    
     3.5.4
    
   
   
       
    
     org.mybatis
        
    
     mybatis-spring
        
    
     2.0.4
    
   
   
       
    
     org.springframework
        
    
     spring-jdbc
        
    
     5.2.6.RELEASE
    
   

2、配置

（1）beans.xml

（2）mybatis-config.xml

（3）StudentMapper.xml

   
       
            select * from students    
   

3、实体对象类

package com.pengshiyu.mybatis.entity;public class Student {
       private int id;    private String name;    private Teacher teacher;    public Teacher getTeacher() {
           return teacher;    }    public void setTeacher(Teacher teacher) {
           this.teacher = teacher;    }    public int getId() {
           return id;    }    public void setId(int id) {
           this.id = id;    }    public String getName() {
           return name;    }    public void setName(String name) {
           this.name = name;    }    @Override    public String toString() {
           return "Student{" +                "id=" + id +                ", name='" + name + '\'' +                ", teacher=" + teacher +                '}';    }}

4、dao

（1）定义接口

package com.pengshiyu.mybatis.dao;import com.pengshiyu.mybatis.entity.Student;import java.util.List;public interface StudentDao {
       public List
   
     selectAllStudent();}
   

（2）实现接口

package com.pengshiyu.mybatis.dao.impl;import com.pengshiyu.mybatis.dao.StudentDao;import com.pengshiyu.mybatis.entity.Student;import org.mybatis.spring.SqlSessionTemplate;import java.util.List;public class StudentDaoImpl implements StudentDao {
       private SqlSessionTemplate sqlSession;    @Override    public List
   
     selectAllStudent() {
           return sqlSession.selectList(                "com.pengshiyu.mybatis.entity.StudentMapper.selectAllStudent");    }    public void setSqlSession(SqlSessionTemplate sqlSession) {
           this.sqlSession = sqlSession;    }}
   

5、测试

package com.pengshiyu.mybatis.test;import com.pengshiyu.mybatis.dao.StudentDao;import com.pengshiyu.mybatis.entity.Student;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import java.io.IOException;import java.util.List;public class Demo {
       public static void main(String[] args) throws IOException {
           ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");        StudentDao studentDao = (StudentDao)context.getBean("StudentDao");        List
   
     students = studentDao.selectAllStudent();        for(Student student: students){
               System.out.println(student);        }    }}
   

实现类继承 SqlSessionDaoSupport

实现类

package com.pengshiyu.mybatis.dao.impl;import com.pengshiyu.mybatis.dao.StudentDao;import com.pengshiyu.mybatis.entity.Student;import org.mybatis.spring.support.SqlSessionDaoSupport;public class StudentDaoImpl extends SqlSessionDaoSupport implements StudentDao {
       @Override    public Student getById(int id) {
           return getSqlSession().selectOne("com.pengshiyu.mybatis.entity.StudentMapper.getById", id);    }}

配置修改

注解方式

1、DAOMapper

package com.pengshiyu.mybatis.dao;import com.pengshiyu.mybatis.entity.Student;import org.apache.ibatis.annotations.Select;public interface StudentMapper {
       @Select("select * from students where id = #{id}")    public Student getById(int id);}

2、Service

（1）接口

package com.pengshiyu.mybatis.service;import com.pengshiyu.mybatis.entity.Student;public interface StudentService {
       public Student getById(int id);}

(2)实现

package com.pengshiyu.mybatis.service.impl;import com.pengshiyu.mybatis.dao.StudentMapper;import com.pengshiyu.mybatis.entity.Student;import com.pengshiyu.mybatis.service.StudentService;public class StudentServiceImpl implements StudentService {
       private StudentMapper studentMapper;    public void setStudentMapper(StudentMapper studentMapper) {
           this.studentMapper = studentMapper;    }    public Student getById(int id) {
           return studentMapper.getById(id);    }}

3、配置

4、测试

package com.pengshiyu.mybatis.test;import com.pengshiyu.mybatis.dao.StudentMapper;import com.pengshiyu.mybatis.entity.Student;import com.pengshiyu.mybatis.service.StudentService;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import java.io.IOException;public class Demo {
       public static void main(String[] args) throws IOException {
           ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");        StudentService studentService = (StudentService) context.getBean("studentService");        Student student = studentService.getById(1);        System.out.println(student);    }}

指定配置文件目录

beans.xml

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