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🔎 This is JAVA Chengxian road. Pay attention to my learning JAVA and don't get lost 👍 If it helps you, give the blogger a free praise to show encouragement Welcome 🔎 give the thumbs-up 👍 Comment collection ⭐ ️ This chapter introduces the construction method, inheritance, rewriting, overloading and creation method in detail. The whole arti ...

Demo prototype project that follows the compilation principle and main process to print 1 + 1 Results Project introduction Printing 1 + 1 results is so complicated that it is not a dazzling skill, but only for simple display: 1. Lexical analyzer; 2. Parser; 3. Script compiler; 4. There are four processes for compiling executors, because the ...

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Microservice architecture is an architecture mode. It advocates dividing a single application into a group of small services. Services coordinate and cooperate with each other to provide final value for users. Each service runs in its own process, and services cooperate with each other through lightweight communication mechanism (usually RESTFU ...

Shiro550, as a classic loophole of HW in 2020, has attracted countless heroes to bow downIn that year's competition, many students won the core targets and difficult targets all over the country through 550. They benefited a lot from their participation, both in attack and defenseAlthough it is a local test WP written two years ago, the vulnera ...

Article catalogue 1, Introduction to EasyExcel 1. Application scenarios for Excel import and export2. EasyExcel features3. Case 1: Excel write operation by easyexcel4. Case 2:EasyExcel reading operation 2, Add function of course classification (back end) 1. Introducing easyexcel dependency2. Use the code generator to generat ...

SpringBoot-24 - detailed explanation of jackson configuration of default Json framework How spring boot returns JSON data At present, there are three JSon formats provided by SpringBoot: Default jackson Gson JsonB fastjson (this is provided by Alibaba and is now widely used in China) We can see all these in the spring boot autoconfigur ...

No Dialect mapping for JDBC type: 1111 problem solution Error reporting reason Because each database has its own dialect, and the simple understanding of dialect is to make a mapping relationship for the unique data types and functions of some databases, and 1111 can't find the corresponding value of dialect because there is no mapping relati ...

Note: mybatis plus is configured with multiple data sources. After adding transactions, the data source switching fails1, Scene descriptionFor multiple data sources used in the project, Impl has a method: MethodA.@Service @AllArgsConstructor @DS("tableA") public class XXXXServiceImpl extends ServiceImpl<XXXXMapper, XXXX> implements XXXXSe ...

Why write business code?Share a painful project maintenance experience directly to see if you have similar experience. At that time, I took over a maintenance project and received the task of adding a new display field as soon as I went to work. I thought it should be a small demand that can be solved in minutes, but I didn't expect it to start ...