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Absrtact: at present, hibernate does not support bitwise and operation, and recent projects need such operation again. Fortunately, hibernate provides related extension functions and can realize relevant operation by itself 1, Background In the work, MySQL is used as the database, java is used as the language of the p ...

1, Object navigation query Previous relationships between customers and contacts were one to many: One to many Scenario: query the customer according to the customer id, and find out all contacts of the customer @Test public void selectTest(){ SessionFactory sessionFactory = null; Session session = null; Transacti ...

SpringBoot has a built-in Hibernate Validator as the checking framework, so as long as we have integrated SpringBoot, we can use Hibernate Validator to complete parameter checking. Common Notes @Null: The commented property must be null; @NotNull: The commented property cannot be null; @AssertTrue: The commented property must be true; @AssertF ...

In fact, it is not difficult to configure spring boot jap+mybatis druid with multiple data sources The key cannot be confused. Otherwise, after the configuration is completed, the connection of the druid data source may explode some strange errors, such as connection timeout, connection unavailable, etc Reference resources: Create a DataSour ...

Original link of blogger: https://blog.csdn.net/zhengwei223/article/details/30506455 The new thread needs to bind the Hibernate session to use the functions of transaction and delay loading in the new thread, otherwise no session exception will be exposed; terms of settlement: //Business method new Runnable() { @Over ...

CRUD task management system based on spring boot 2. X + quartz is suitable for small and medium-sized projects. CRUD task management system based on spring boot + quartz: https://gitee.com/52itstyle/spring-boot-quartz development environment JDK1.8,Maven,Eclipse Technology stack SpringBoot2.0.1,thymeleaf3.0.9,quartz2.3.0,iview,vue,layer,AdminL ...

Hibernate's addition, deletion, modification and query increase There are many ways to add, such as save, persist, savaoroupdate and merge. The use method is as follows. The code here follows the previous section package test; import java.util.Date; import org.hibernate.Session; import org.hibernate.SessionFactory ...

1. In the previous pure xml mode, we have many configuration files. We can use annotation and xml to develop. In this way, our configuration files will be much less. At the same time, we can directly see the configuration in the class, so that we can quickly build a ssh integration project First of all, we should consider: what do we need to re ...

These days, I'm groping for Intellij idea to record some small knowledge points. First contact with Intellij and use Hibernate framework to operate mysql database. If you want to use unit test in Intellij, you know that Junit is needed, but it is not found by default. How to solve it? >>First, go to settings an ...

1. What is a persistence class 1. Persistence class: it is a Java class (the JavaBean we wrote), which can be a persistence class if the mapping relationship between the Java class and the table is established. Persistence class = JavaBean + xxx.hbm.xml 2. The concept of persistent classes exists in the Hibernate framework e ...