mybatis separator
时间: 2023-11-07 17:17:35 浏览: 43
MyBatis provides a built-in dynamic SQL feature called "foreach" that allows you to iterate over a collection and generate dynamic SQL statements. The "separator" attribute is used in conjunction with the "foreach" tag to specify a string that should be inserted between each item in the collection.
Here is an example of how to use the "separator" attribute in MyBatis:
```xml
<select id="getUsersByIds" resultType="User">
SELECT * FROM users
WHERE id IN
<foreach item="item" collection="userIds" open="(" close=")" separator=",">
#{item}
</foreach>
</select>
```
In this example, the "separator" attribute is set to ",". It means that a comma will be inserted between each item in the "userIds" collection when generating the SQL statement. This allows you to build a query like `SELECT * FROM users WHERE id IN (1, 2, 3)` dynamically.
You can customize the separator string by changing the value of the "separator" attribute according to your specific needs.
相关推荐
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![-](https://csdnimg.cn/download_wenku/file_type_column_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)