MyBatis单表增删改查--接口实现

　　我是用xml实现了单表的增删改查之后才改用接口的，所以我这里就不把那些配置拷贝过来了，其实东西都一样。

1:接口

　　这个更有意思了。把具体的操作写在了注解里面。

package com.zhao.mapper;import java.util.List;import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;import com.zhao.entity.Student;
public interface StudentMapper {@Select(value="select * from student")public List<Student> queryStudent();@Select(value="select * from student where stu_id=#{stu_id}")public Student selectStudentById(int stu_id);@Delete(value="delete from student where stu_id=#{stu_id}")public void deleteStudentById(int stu_id);@Insert(value="insert into student(stu_name,stu_gender) values(#{stu_name},#{stu_gender})")public void insertStudent(Student student);@Update(value="update student set stu_name=#{stu_name},stu_gender=#{stu_gender} where stu_id=#{stu_id}")public void updateStudentById(Student student);
}

2：测试代码

　　依旧是增删改查，接口实现是session获取接口对象，然后调用接口相应的方法。至于底层的东西 mybatis就帮我们解决了，我们不需要在这里用具体的实现类，具体的实现类也不好用。这样多方法，只写法方法签名，然后把数据表的操作写注解了，直接用就可以了。

package com.zhao.mapper;import static org.junit.Assert.*;import java.io.InputStream;
import java.util.List;import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Before;
import org.junit.Test;import com.zhao.entity.Student;
import com.zhao.entity.StudentTest;public class StudentMapperTest {private SqlSessionFactory factory;@Beforepublic void before() {try {/** 1: Reader reader* =Resources.getResourceAsReader("Configuration.xml"); factory =* new SqlSessionFactoryBuilder().build(reader);*/// 2:InputStream inputStream = StudentTest.class.getClassLoader().getResourceAsStream("Configuration.xml");factory = new SqlSessionFactoryBuilder().build(inputStream);} catch (Exception e) {e.printStackTrace();}}@Testpublic void testQueryStudent() {SqlSession session = factory.openSession();try {StudentMapper mapper = session.getMapper(StudentMapper.class);List<Student> students = mapper.queryStudent();for (Student student : students) {System.out.println(student);}session.commit();} finally {session.close();}}@Testpublic void testSelectStudentById() {SqlSession session = factory.openSession();try {StudentMapper mapper = session.getMapper(StudentMapper.class);Student student = mapper.selectStudentById(2);System.out.println(student);session.commit();} finally {session.close();}}@Testpublic void testDeleteStudentById() {SqlSession session = factory.openSession();try {StudentMapper mapper = session.getMapper(StudentMapper.class);mapper.deleteStudentById(2);session.commit();} finally {session.close();}}@Testpublic void testInsertStudent() {SqlSession session = factory.openSession();try {StudentMapper mapper = session.getMapper(StudentMapper.class);Student student = new Student("zaza", "男");mapper.insertStudent(student);session.commit();} finally {session.close();}}@Testpublic void testUpdateStudentById() {SqlSession session = factory.openSession(true);try {StudentMapper mapper = session.getMapper(StudentMapper.class);Student student = new Student(7,"zaza", "m");mapper.updateStudentById(student);session.commit();} finally {session.close();}}
}

转载于:https://www.cnblogs.com/zhao307/p/5402072.html

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