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Recently, I checked a spring data jpa problem. In fact, it can not be regarded as a framework level problem, but rather a configuration problem; Because spring data jpa has not been used before (more mybatis or self-developed orm components), it is expected to record the configuration of spring data jpa through this article. Starting from the ...

leetcode - 5. Longest palindrome substring Give you a string s and find the longest palindrome substring in S. Example 1: Input: s = "babad" Output:"bab" Explanation:"aba" The same answer is in line with the meaning of the question. Example 2: Input: s = "cbbd" Output:"bb" Example 3: Input: s = "a" Output:"a" Example 4: Input: s = "ac" ...

The great Java 18 is coming out soon, and we may not be familiar with the core Lambda usage of Java 8. This article shares several tips for operating Map in the development process on Stream technology. After reading this article, I believe you will have a new understanding of Stream. 1, Gracefully initialize a Map Before looking down, firs ...

1. return of saltstack component The return component can be understood as the SaltStack system stores or returns the data returned by Minion to other programs. It supports a variety of storage methods, such as MySQL, MongoDB, Redis, Memcache, etc. through return, we can record each operation of SaltStack and provide a data source for futu ...

  man has nine volumes. System programming is the content of Volume II, and volume V is file format and specification open function Function prototype Parameter pathname file name Macro with parameter flags as access mode: o_ Rdonly (read only), O_ Wronly, O_ Rdwr (read write) these three must be added O_ Append, O_ Creat, O_ Excl ...

Reproduced from: Network Programming --- subprocess module, struct module, glue package, UDP protocol, socket_server module - Remaining person. - Blog Park Network Programming --- subprocess module, struct module, glue package, UDP protocol, socket_server module   Catalog subprocess modulestruct moduleSticky package Sticking prob ...

1. What is dynamic and static separation Dynamic and static separation is mainly realized through nginx + PHP FPM, in which nginx handles static files such as pictures and html, and PHP handles dynamic programs. Dynamic static separation refers to the architecture design method of separating static pages from dynamic pages or static conte ...

tar command Use the tar command to package, compress, and decompress files: Compress the file using gzip and specify the compression name tar_gzip.tar.gz [root@ikta ~]# tar -czvf tar_gzip.tar.gz find_test1 find_test2 find_test1 find_test2 Compress the folder using bzip2 and specify the compression name tar_bzip2.tar.bz2 [root@ikta ~]# tar ...

1. Introduction to keepalived Keepalived software was originally designed for LVS load balancing software to manage and monitor the status of each service node in LVS cluster system. Later, it added VRRP function that can realize high availability. Therefore, in addition to managing LVS software, keepalived can also be used as high availab ...

1, Class Constructor: the constructor is a special member function with the same name as the class name. It is automatically called by the compiler when creating a class type object to ensure that each data member has an appropriate initial value and is called only once in the life cycle of the object. Characteristics of constructors: construct ...