Mybatis批量插入返回数目 Mybatis批量插入返回成功的数目实例

Morpheus丶 2021-01-15 我要评论

Mybatis批量插入返回影响的行数

环境:

postgresql 9.6.5

spring 4.1

mybatis3

junit4

log4j

ThesisMapper.xml:

<!-- 批量插入 -->
  <insert id="insertList" parameterType="java.util.List">
    insert into public.thesis
    (name)
    values
    <foreach collection="list" item="t" index="index" separator=",">
      (
      #{t.name}
      )
    </foreach>
  </insert>

Mapper.java 借口:

public interface ThesisMapper {
  int insertList(List<Thesis> thesisList);
}

服务类:

ThesisService:

public int insertList(List<Thesis> thesisList) throws Exception {
  return thesisDao.insertList(thesisList);
}

测试父类:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:spring-mvc.xml", "classpath:spring-mybatis.xml" })
@WebAppConfiguration
public class BaseTest {
  @Autowired
  protected WebApplicationContext wac;
  @Test
  public void test() {}
}

测试类:

public class UserOpsTest extends BaseTest {
  @Autowired
  private ThesisService ts;
  @Test
  public void insertListTest() {
    List<Thesis> thesisList = new ArrayList<Thesis>();
    Thesis t1 = new Thesis();
    Thesis t2 = new Thesis();
    Thesis t3 = new Thesis();
    t1.setName("qq1");
    t2.setName("ww2");
    t3.setName("asd");
    thesisList.add(t1);
    thesisList.add(t2);
    thesisList.add(t3);
    try {
      System.out.println(ts.insertList(thesisList));
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

日志输出:

[DEBUG] ==> Preparing: insert into public.thesis ( name) values ( ? ) 
 [DEBUG] ==> Parameters: qq1(String), ww2(String), asd(String)
 [DEBUG] <==  Updates: 3
 3

返回结果既为所求.

源码地址:

https://github.com/timo1160139211/trans

补充：关于Mybatis的insert方法返回值(将返回值受影响条数改为插入后的自增主键id)

今天做ssm项目的时候有一个这样的需求——我借阅一本书然后生成一条借阅记录（借阅记录的主键是递增的“borrowNum”），然后将这条记录的主键返回，在往上查阅资料后知道，只要在对应的xml文件对应的那个方法加上两个属性就行了，代码如下：

 <insert id="insert" parameterType="com.bsm.model.Borrow" useGeneratedKeys="true" keyProperty="borrownum" keyColumn="borrowNum" >
  insert into t_borrow (userAccount, bookInfoNum,borrowTime, giveBackTime)
  values (#{useraccount,jdbcType=VARCHAR},#{bookinfonum,jdbcType=INTEGER},
   #{borrowtime,jdbcType=DATE}, #{givebacktime,jdbcType=DATE})
 </insert>

就是加入的这三个属性：