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Insert – map insert statements.Update – map update statements.Delete – map delete statements.select – map query statementsql – repeatable sentence blocks that can be referenced by other statementsresultMap – describes how to load objects from the database result set. It is the most complex and powerful elemen ...

1. Scene restore In the actual project, there are many needs to search or filter the required data by setting a specific time period. Today, the author gives a detailed explanation on the application method of greater than and less than signs involved in time comparison in mybatis. 2. Implementation plan Here are two possible methods: ① Esc ...

Mainly explain the integration process of MyBatis and Spring Boost through examples. preface Last month, I saw the project code written by my colleague and found that there was no XML file in MyBatis. I asked him, "MyBatis is integrated with Spring. I have written a Demo before. Shouldn't there be XML file configuration?", Th ...

In mybatis, we can customize the parameter encapsulation policy when setting parameters or fetching the result set in the form of custom TypeHandler. For example, if the status code of an employee is 100, we display the status code 100 in the status code column empStatus in the database, but when querying the employee in the database through ...

Explain the integration process of MyBatis and Spring through examples. preface This example of MyBatis and Spring integration was written when I needed to be familiar with MyBatis when I first transferred in March this year. I mainly wanted to know how the project uses MyBatis in Spring from 0 to 1. This example refers to the "C ...

Druid Spring boot integrated Druid scheme: one is to directly configure Druid spring boot starter in POM without writing any code; One is to configure druid and write a few lines of code, which can be added; On the basis of scheme 1, add stat and wall to verify login. First present the github code address: https://github.com/yudiandemingzi/ ...

Front blog: Obtaining SqlSessionFactory for MyBatis principle analysis , this is a sequel. The sqlsession is obtained mainly through several overloaded methods of SqlSessionFactory, and the Transaction is obtained by obtaining the datasource and transactionFactory from the environment in the configuration. Then get Transaction, Executor and De ...

cache 1. Introduction 1. What is Cache? There is temporary data in memory. Put the data frequently queried by users in the cache (memory), and users do not need to query from the disk (relational database data file) but from the cache to query the data, so as to improve the query efficiency and solve the performance problem of high concurr ...

1, Environment construction   create maven web project mybatis01 and add maven dependencies as follows. <dependency> <groupid>org.mybatis</groupid> <artifactid>mybatis</artifactid> <version>3.4.6</version> </dependency> <dependency> <groupid>mysql</groupid ...

12. Dynamic SQL What is dynamic SQL? Dynamic SQL is to generate different SQL statements according to different conditions Dynamic SQL is one of the powerful features of MyBatis. If you have used JDBC or other similar frameworks, you should be able to understand how painful it is to splice SQL statements according to different conditions. Fo ...