Mybatis 批量插入返回 主鍵ID
阿新 • • 發佈：2019-02-17
官方修復 https://github.com/mybatis/mybatis-3/pull/547
注：使用時 mapper中的 collection 引數必須為 list，即外部的mapper介面中只接受兩種情況：
1、不Param註解，預設值list
2、使用param註解，但註解的value也必須為list
private Collection<Object> getParameters(Object parameter) {
Collection<Object> parameters = null;
if (parameter instanceof Collection) {
parameters = (Collection) parameter;
} else if (parameter instanceof Map) {
Map parameterMap = (Map) parameter;
if (parameterMap.containsKey("collection")) {
parameters = (Collection) parameterMap.get("collection");
} else if (parameterMap.containsKey("list")) {
parameters = (List) parameterMap.get("list");
} else if (parameterMap.containsKey("array")) {
parameters = Arrays.asList((Object[]) parameterMap.get("array"));
}
}
if (parameters == null) {
parameters = new ArrayList<Object>();
parameters.add(parameter);
}
return parameters;
} 正文：
之前版本的mybatis 3.3.X有Bug，故無法獲取或報錯，以下版本可以正確使用：
<dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.4</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version> </dependency>
mapper：
int batchInsert(List<X> list);xml：
<insert id="batchInsert" useGeneratedKeys="true" keyProperty="ID" parameterType="java.util.ArrayList"> insert into X(ActivityId,UserId, Ext,Status, CreateTime, UpdateTime) VALUES <foreach collection="list" item="item" index="index" separator=","> (#{item.activityId},#{item.userId},#{item.ext},#{item.status}, NOW(),NOW()) </foreach> </insert>
session：
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sessionFactory" />
</bean>
<bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="configLocation" value="classpath:config/mybatis-config.xml" />
</bean>test：
@Autowired
private SqlSessionTemplate sqlSessionTemplate;
@Autowired
private XMapper xMapper;
@Test
public void testBatchInsert() throws Exception {
List<X> list = new ArrayList<>();
list.add(new CocaShareInfoPoJo(11,11,"11",11));
list.add(new CocaShareInfoPoJo(22,22,"22",22));
list.add(new CocaShareInfoPoJo(33,33,"33",33));
list.add(new CocaShareInfoPoJo(44,44,"44",44));
//int result = sqlSessionTemplate.insert("com.xxxx.xMapper.batchInsert",list);
xMapper.batchInsert(list);
System.out.println();
}