Mybatis mapping problem

Isn't there any problem with this way of writing? Use surface and field names to distinguish mappings. Will mybatis recognize it?

大家讲道理 2017-05-27 17:41:24 0  2  1052

java - Mybatis related query

In actual development, Mybatis one-to-many and many-to-many related queries use reultMap reference, javaType reference or select reference. Which one has better performance? Will using select lazy loading improve query speed and performance?

ringa_lee 2017-05-27 17:41:50 0  1  753

java - spring boot integrated mybatis annotation version query

-spring boot integrates mybatis and uses annotations to implement spring boot and mybatis. It has been integrated normally. Annotations are used when using queries. (The project does not have any XML files) {Code...} I don’t know why this method is used. There are only a few attributes. The value wi...

曾经蜡笔没有小新 2017-06-23 09:14:41 0  2  1267

REGEXP in mybatis

The red box part (,sum(if(Item_169 REGEXP '^[0-9]{1,12}(.[0-9]{1,5})?$',Item_169,0))) is passed into mybatis in the background Configuration file (the configuration file is received with ${}), the entire sql is copied to the mysql database and runs normally; how to solve this problem

怪我咯 2017-06-06 09:51:53 0  1  857

java - Spring boot mybatis custom converter problem

When spring boot is integrated with mybatis, the custom typehandler (converter) is not called. First, the table structure entity enumeration type custom handler mybatis.type-handlers-package has been configured. Let me help.

ringa_lee 2017-06-14 10:54:51 0  1  1361

Which label should be used in mybatis to use mysql's ON DUPLICATE KEY UPDATE syntax to implement existence and update?

Mybatis seems to only provide four tags for add, delete, modify and check (<insert>/<update>/<delete>/<select>). But similar to this branch processing statement with existence and update, how should mybatis be used? ?

PHP中文网 2017-06-10 09:49:42 0  1  1030

java - Mybatis database multi-table related paging problem

For example: there are two entity classes User and Address {code...} Database: {code...} Mybatis mapping configuration: {code...} The relationship between users and addresses is: one user has multiple addresses, An address can only belong to one user. One-to-many Assume that the current demand is to...

黄舟 2017-06-10 09:49:39 0  6  1619

mysql - mybatis query counts the number of a certain column, group query based on a column, how to receive in xml file

Mybatis query counts the number of a certain column. According to a column, group query. I don’t know how to write the resultType parameter in the xml file. SQL statement: select title_type,COUNT(title) from qa_title where title like '%车%' GROUP BY title_type; xml: <...

ringa_lee 2017-06-15 09:21:18 0  1  1437

java - SSM integration page prompts 404 problem, please take a look (Spring+MyBatis is successful, but integrating SpringMVC always gives 404)

The web.xml configuration is as follows. The spring-mvc.xml configuration is as follows. The controller content is as follows. The project structure is as follows. Phenomenon: When starting tomcat, the jump pages index.jsp and showUser.jsp are both 404. Since the SSM framework is built, the previous...

仅有的幸福 2017-05-17 10:00:36 0  1  1015

java - How to modify mybatis if it exists in the database, and add if it does not exist

I want to implement an insert function. Before inserting, it is judged whether there is the same data as the key field in the database. If so, perform the modification operation. If not, perform the insert operation. I would like to ask for advice: Is there any way to make the judgment without doing...

给我你的怀抱 2017-05-17 10:04:15 0  3  649

java - Mybatis: Can Mybatis directly return a two-dimensional array (table)

Application scenario: Each mybaits result is mapped to an entity class. Sometimes when I am making front-end reports, I can directly get the desired report through SQL statements, but the results must be mapped to an entity class. If there are multiple The reports are different in individual fields,...

高洛峰 2017-05-17 10:01:04 0  3  1343

AJAX POST and the plus sign (+) -- how to encode it?

I'm POSTing the contents of a form field to a PHP script via AJAX and escaping using JavaScript's escape(field_contents). The problem is that any plus signs are stripped and replaced with spaces. How can I safely "encode" the plus sign and properly "decode" it on the PHP side?

P粉116654495 2023-07-17 18:42:16 0  1  529

How to apply the correct element plus message box style?

This is what the element plus message box looks like on a minimal page I built: I want it to look like the one in the element-plus document. I use Vue with vite and ElementPlus. I copied the settings from vite and elementplus documentation. I played with a lot of other elements and they all rendered...

P粉052724364 2023-11-23 11:06:50 0  2  772

mysql - mybatis select statement problem

Message reminder continues. This message may be someone else's direct reply to your article. At this time, you need to perform database operations to associate the article table to obtain the content of the corresponding article [Message reminder: There is a new reply to your article xxx]. It may al...

过去多啦不再A梦 2017-06-20 10:05:48 0  3  1147

JAVA mybatis pojo.xml configuration problem

I just learned JAVA, and I wrote it based on the example, but it can’t run. The error message is: {code...} My writing method is like this {code...} I wrote pojo.User, and the error message is not sure what to do here. Write, the project directory is as shown in the figure

某草草 2017-06-23 09:14:12 0  3  997

How to restore the atom plug-in git-plus to the specified commitID

As mentioned, I found that I can use git-plus to restore the latest version, but I didn't find how to restore to the specified version. How to do it? For example, ctrl-shift-h selects Log CurrentFile and you will see the short Hash, which is the commitID. These are the versions I pushed in atom usin...

PHP中文网 2017-05-02 09:41:35 0  1  682

java - Mybatis executes sql summation problem

This is a summation sql I need to execute. In the client, the query value count is 0.select count(1) as COUNT from dd_mst where ac_id=1000002400 and ac_seqn<>1 and ac_sts ='1' passed in the program The following tool class is called: The problem is, through...

淡淡烟草味 2017-06-14 10:51:48 0  1  742

In Objective-C, some methods are preceded by plus and minus signs. Is this correct?

In Objective-C, some methods in classes have a + plus sign, and some have a - minus sign. The differences between the two are as follows: Methods preceded by a plus sign (+) are class methods, and these methods can be called directly using the class name. , its main function is to create an instance...

仅有的幸福 2017-05-02 09:24:35 0  1  720

angular.js - In ionic, ion-content plus ion-list and ion-item have their own margins. How to remove this?

In ionic, ion-content plus ion-list and ion-item have their own margins. How to remove this?

阿神 2017-05-15 17:11:08 0  2  642

AJAX POST and the plus sign (+) - how to encode it?

I'm posting the contents of a field to a PHP script via AJAX and using JavaScripttoscape(field_contents). The problem is that any plus sign will be triggered and placed by space. How can I find the "encoded" layout and appropriate "code" on the HP side?

P粉124070451 2023-07-21 09:47:06 0  2  720