Programmer Group

1. spring spring defines things by three APIs Transaction Definition Platform Transaction Manager manages things, submits or rolls back Transaction Status represents the state in which something is running Definition of Things Transaction Definition public interface TransactionDefinition { //Isolation level int getIsolati ...

Let's briefly talk about how to use [jt400.jar] to connect to the DB2 database on AS400. jt400.jar resource, if you have AS400 client installed, refer to IBM official website ※ http://www-01.ibm.com/support/docview.wss?uid=swg21398042 Installation directory has jt400.zip, suffix can be used. If you don't have AS400 client installed, download it ...

One of my younger brother's needs yesterday was to say that a list set update was put into a table, but it was different from insert. List needs to be encapsulated as map for foreach in incoming xml <update id="updateYesterdayAmountBatch" parameterType="java.util.Map"> update debt_current_user_holding_temp dcu set dcu.y ...

brief introduction MyBatis-Plus (MP) is a MyBatis enhancement tool. It is based on MyBatis only to enhance without changing. It is born to simplify development and improve efficiency. Characteristic Non-intrusive: only enhance without change, introduce it will not affect existing projects, such as silky smooth Low loss: Aut ...

select|insert|update|delete tag parsing process in Mybatis source code - XXXmapper.xml Prerequisite: Last time I talked about an article entitled uuuuuuuuuuu Resolution Map Label Resolution Process in Mybatis Source-XXXmapper.xml Now let's talk about how Mybatis parses the select|insert|update|delete tag in XXXmapper.xml file. Because these ta ...

Preface Last time I introduced the simple integration of Mybatis in Spring Boot. This article goes deep into creating a template framework suitable for enterprise development by combining generic Mapper, Mybatis Geneator and Page Helper. text The project framework still uses Spring Boot's ace back-end template ...

There was an error in implementing an update data today. org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error updating database. Cause: java.lang.NullPointerException ### Cause: java.lang.NullPointerException at org.mybatis.spring.MyBatisExceptionTranslator.translateExce ...

Recently, due to the need of the project, we need to integrate the swagger-ui product for automatic generation of api documents. We have studied it for a long time. Of course, we have trampled a lot of pits. It is a summary of some experience. I hope it can help the students who need it to take less detours. I guess I haven't learnt Chinese we ...

If you like to read Wechat, you can also pay attention to my Wechat public number: learn java well and get high quality learning resources. Finally, I have time to do java. Today, I use IDEA to build a multi-module aggregation project based on maven. After many attempts, I finally succeed! Note: ** This is an improved version based on the ori ...

Spring Spring is an open source framework. Spring is a lightweight Java development framework that emerged in 2003. It is derived from some concepts and prototypes elaborated by Rod Johnson in his book Expert One-On-One J2EE Development and Design. It is created to solve the complexity of enterprise application development. Spring uses basic Ja ...