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Operating environment: Development tools: IDEA /Eclipse Database: mysql5 seven Application service: Tomcat7/Tomcat8 Using framework ssm Project introduction With the development of the times, tourism has become one of many leisure ways for people in their spare time. It is the only choice for many people to take their family to a beautiful p ...

Learning content: resultMap result mapping set and log 1. resultMap result mapping set Problem: find users by id When the column in the database is inconsistent with the attribute name in the entity class Columns in database: Attribute name in entity class: result: Because sql statements select * from mybatis.user where id=#{id} is actual ...

🏇 Small wood come Yes \textcolor{Orange} {here comes Koki} Here comes Koki 🍣 ...

1, Introduction to interceptor 1. Interceptor definition The Interceptor in spring MVC is similar to the Filter in Servlet. It is mainly used to intercept user requests and make corresponding processing. For example, the Interceptor can verify permissions and judge whether users log in To use the interceptor in spring MVC, you need to de ...

Authorization Basics 1. Concept Authorization is access control, which controls who can access which resources. After identity authentication, the principal needs to allocate permissions to access system resources. Some resources cannot be accessed without permissions. 2. Key objects Who performs How operation on what ": Who: the subj ...

Course notes Day14 Collection collectionList collectionSet set Chapter 1 Collection Section 01 basic theory Origin of collection What are the characteristics of arrays? 1. Any data type (basic data type or reference data type) can be stored 2. The length of the array is fixed and cannot be changed Among the above features, we know that ...

1 Introduction to ArrayList In the collection framework, ArrayList is a common class that implements the List interface. The specific framework diagram is as follows: [description] ArrayList implements the RandomAccess interface, indicating that ArrayList supports random accessArrayList implements the Cloneable interface, which indi ...

1. Demand Use a set object to store a deck of playing cards, disrupt the order of all playing cards, and then distribute them to three players and cards represented by the set, and print the set contents of players and cards. 2. Steps Buy a deck of playing cards and combine the colors and numbers to generate all ordinary cards. Manually add ...

Background; Another experience of abandoning windows The main reason is that the host is old and used for another host. I installed rocky linux directly. Personally, it's ubuntu appropriate. But I am a standard centos user. Just in time for the curtain call of centos. By the way, experience rocky linux, the father of centos! The process of ins ...

In this article, let's talk about the plug-in mechanism of mybatis, which is based on myabtis 3.4 Version 6. Knowledge points What is a plug-inHow to customize plug-insPlug in implementation principle What is a plug-in I believe you must have used many plug-ins, such as eclipse Plug-in, idea plug-in, chrome browser plug-in, etc. in short ...