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Mybatis-Plus 1 Introduction to mybatis plus Official website address Mybatis plus (mp for short) is an enhancement tool of mybatis. Based on mybatis, it is only enhanced without change. It is developed for simplification and efficiency. characteristic: No invasion: it is only enhanced without change, and its introduction will not affect ...

Source code acquisition: download from "resources" on the blog home page! Project significance: Since the reform and opening up, China's tourism has developed rapidly, but comparatively speaking, the breadth and depth of China's tourism development are far from meeting the needs of economic development and the improvement of peopl ...

RBEC (rights management system) 1. Importance of RBEC in the project In enterprise projects, due to the different permissions of personnel and the temporary change or change of permissions, the addition of new users or new roles will also need to be changed. Therefore, there is an urgent need for a dynamic permission allocation system, which i ...

MP update operation 1.1 update operation @SpringBootTest public class TestMP2 { @Autowired private UserMapper userMapper; /** Change the user name of ID=229 to June 1 children's day. */ @Test public void updateUser(){ User user = new User(); user.setId(229).setName("children's Day"); //set name="xxx" where id = 229 userMapper.upda ...

jdk1.5 start supporting annotations, spring 2 5 start comprehensive direct annotation Preparation: inject attributes by annotation 1. Introduce the context file header into the spring configuration file <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.o ...

Developing spring MVC with annotations Statement: This article is a study note, written according to spring MVC of madness theory SpringMVC 4.2.4.RELEASE Chinese document I. Development with annotations 1. We conduct POM Dependency injection of XML: <build> <resources> <resource> ...

Mybatis actual combat Tip: you can add the directories of all articles in the series here. You need to add the directories manually For example: the first chapter is the use of pandas, an introduction to Python machine learning Tip: after writing the article, the directory can be generated automatically. For how to generate it, please refer ...

 19.  19. One to one and one to many association queries?     <mapper namespace="com.lcb.mapping.userMapper"> <!--association One to one association query --> <select id="getClass" parameterType="int" resultMap="ClassesResultMap"> select * from class c,teacher t where c.teacher_id=t.t_id ...

Spring framework overview Spring makes it easy to create Java enterprise applications. It provides everything needed to use the Java language in the enterprise environment, supports Groovy and Kotlin as alternative languages on the JVM, and can flexibly create a variety of architectures according to the needs of applications. Starting with Spr ...

The SSM project uses interceptors to realize login authenticationLogin interface implementation public User queryUser(String UserName, String Password,HttpServletRequest request, HttpServletResponse response) { User user = userMapper.queryUser(UserName,Password); if(!StringUtils.isEmpty(user)){ //1. Get session ...