I want to use the example class of mybatis to generate the following sql statement: SELECT * FROM User where nick_name like "%1502%" or real_name like "%1502%" or mobile like "%1502%" this is how I used it: UserExample u...
there is a problem that I can t solve when I just learned ssm,. No, no, no. The directory structure is as follows error message: Caught exception while allowing TestExecutionListener [org.springframework.test.context.support.DependencyInjectionTes...
first, there is a field of Date type in the database. If you want to query all the records of 2018-04-08, but ignore the following time, minutes and seconds, how do you write the query statement and the mybatis mapping file? ...
when using MyBatis, there is a problem with an incomprehensible SELECT statement. <select id="getHotelList" resultType="com.genius.travelline.product.entity.Hotel"> SELECT a.id AS "id", a.title AS "t...
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when using Mybatise, I use the following code to operate on the database. No error is reported, and it executes successfully, but the database does not find data @Test public void testInsertUser(){ SqlSession sqlSession = sessionFactory.o...
Multi-table management, because the sum operation is used, so even if there is no data mybatis query will become one. The result is that null, if the default value is set on the sum, such as 0, it will return a piece of data that only the field sum is 0....
use mybatis to configure custom secondary cache. Using xml annotation can use < cache type= "com.test.dao.MybatisRedisCache " > to successfully use custom cache, but using @ CacheNamespace (implementation = MybatisRedisCache.class) on the dao i...
the .xml file of mybatis in spring-boot can only be placed under resources mappper, like this: put together with the interface, not uniformly placed under the resources mapper, separate, easy to manage. thanks! ...
there is a class A , SubA inherits A, but the console reports an error Class constructor xxx cannot be invoked without new how to solve it? A class A{ constructor() {} }; export default A A import A from xxx class SubA extends A{ co...
configured one master and two slaves, master write slave read, found that if a slave, or master, the system will not work, always trying to connect to the failed database. What about this situation? my goal from low to high is: 1 if you hang up one sl...
background and requirements recently encountered a demand to draw antenna pattern (also known as lobe pattern, radiation pattern or beam pattern) on the web side. see ...
because of the lower version of vue-cli, the project has been stuck in the input project name when you created the project. So I want to update vue-cli, but keep reporting errors. Even if you uninstall it, you can t update it again. Excuse me, what s g...
Happy New year, my friends! currently wants to configure a picture server, which can realize the following website picture server functions https: car2.autoimg.cn cardf..., that is, upload an image. You can generate the corresponding size image thro...