项目管理-mybatis学习源码（二）

import com.tong.mapper.ClassesMapper; import com.tong.mapper.StudentMapper; import com.tong.mapper.TeacherMapper; import com.tong.mapper2.ClassesMapper2; import com.tong.mapper2.StudentMapper2; import com.tong.pojo.Classes; import com.tong.pojo.Student; import com.tong.pojo.Teacher; 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 org.junit.After; import org.junit.Before; import org.junit.Test; import java.io.IOException; import java.io.InputStream; import java.util.List; public class TestManyTableQuery { InputStream is = null; SqlSession session = null; @Before public void before() throws IOException { // （1）读取核心配置文件 is = Resources.getResourceAsStream("SqlMapConfig.xml"); // （2）创建SqlSessionFactoryBuilder对象 SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder(); // （3）SqlSessionFactoryBuilder对象获取SqlSessionFactory对象 SqlSessionFactory factory = builder.build(is); // （4）SqlSessionFactory对象获取SqlSession对象 session = factory.openSession(); } @After public void after() throws IOException { // 释放资源 session.close(); is.close(); } @Test public void testFindAllStudent(){ StudentMapper studentMapper = session.getMapper(StudentMapper.class); List<Student> all = studentMapper.findAll(); all.forEach(System.out::println); } @Test public void testFindAllClasses(){ ClassesMapper classesMapper = session.getMapper(ClassesMapper.class); List<Classes> all = classesMapper.findAll(); all.forEach(System.out::println); } @Test public void testFindAllTeacher(){ TeacherMapper teacherMapper = session.getMapper(TeacherMapper.class); List<Teacher> all = teacherMapper.findAll(); all.forEach(System.out::println); } @Test public void testFindAllClasses2(){ ClassesMapper2 classesMapper2 = session.getMapper(ClassesMapper2.class); List<Classes> all = classesMapper2.findAll(); all.forEach(System.out::println); System.out.println("-------------------------"); System.out.println(all.get(0).getStudentList()); } @Test public void testFindAllStudent2(){ StudentMapper2 studentMapper2 = session.getMapper(StudentMapper2.class); List<Student> all = studentMapper2.findAll(); all.forEach(System.out::println); } }