jpa一对多

package com.itheima;

import com.itheima.dao.RoleDao;
import com.itheima.dao.UserDao;
import com.itheima.domain.Role;
import com.itheima.domain.User;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.annotation.Rollback;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.transaction.annotation.Transactional;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:beans.xml")
public class AppTest {
@Autowired
private UserDao userDao;
@Autowired
private RoleDao roleDao;
@Test
@Transactional
@Rollback(false)
public void testSave() {//一对多
//建立数据
User user = new User("小明", "123", 28);
//建立角色
Role role = new Role("父亲", "赚钱养娃");

//数据产生关系
user.getRoles().add(role);
role.getUsers().add(user);

 

//保存了
userDao.save(user);
roleDao.save(role);

}

@Test
@Transactional
@Rollback(false)
public void testSave1() {
//建立数据
User user = new User("小明", "123", 28);
//建立角色
Role role = new Role("父亲", "赚钱养娃");

//数据产生关系
user.getRoles().add(role);
role.getUsers().add(user);

roleDao.save(role);
}

@Test
@Transactional
@Rollback(false)
public void testRemove() {
Role role = roleDao.findById(1).get();

roleDao.delete(role);

}

}