Programmer Group

MyBatis Cache Caching can improve system performance, speed up access, reduce server pressure and bring better user experience. Caching uses space for time, and a good cache has a high hit rate and a small amount of data. Caching is a very important technology. 1.0. Reencapsulate SqlSession FactoryUtils In order to configure cache learning, ...

First of all, we need to understand the problem of subclass inheritance from parent constructor calls. Creating subclass instances through subclass parametric constructors defaults to calling parent parametric constructorsCreate subclass instances through subclass parametric constructors, and also call parent parametric constru ...

This week, we learned the basic usage of servlets. Until this week, we had been writing Java code on the page. The servlet is to move these Java code into the Java file. When creating servlet s, we check doGet, doPost by default After successful creation, a Java file will be generated, which will automatically have the doGet and ...

1. Questions 1. What is a spring container? 2. How does the spring container start? 3. What is the nature of the spring container? 4. What role does the spring container play in the spring family? 5. spring container design ideas? 2. Keyword Container, Session, Context, Factory, Registry, Resolution, ...

Preface: Recently I read a series of MySQL articles. The understanding of Mysql's basic knowledge is consistent with practice. mark it. Text: The basic knowledge of MySql is divided into four parts: first, concurrency control (read/write lock); second, transaction; third, multi-version concurrency control (MVCC); fourth, sto ...

Label PostgreSQL, memory table, unlogged table background Memory tables are often used in scenarios where persistence is not required, changes are frequent, and RT is low. At present, the community version of PostgreSQL does not have the function of memory tables. postgrespro provides two plug-ins to implement similar functions of memory tab ...

pt-archiver - Archive rows from a MySQL table into another table or a file. pt-archiver nibbles records from a MySQL table. The --source and --dest arguments use DSN syntax; if COPY is yes, --dest defaults to the key's value from --source. pt-archiver is a component of Percona-Toolkit toolkit, which is mainly used to archive and clean MySQL t ...

Requirement: If you want to comment on an article on the website, and the comment is for users to register and log in, how can you avoid this troublesome step? The answer is to login through third-party authorization. This article describes the github Authorized Login tutorial. Effect Experience Address: http://biaochenxuying.cn 1. github thi ...

trim() function for removing first and last spaces and special characters of strings Returns a string that has been stripped of spaces and special characters String trim (string str [, string charlist]); String object to be operated on by str, the second parameter is an optional parameter, select the character to be deleted from the string, do ...

1. When login is supported, specify the language, or switch the language after login (param_lang=en) 2. Support Cookie Storage Language Settings, Use Session Storage without Cookie, Support Mobile 3. Support property files and databases to store translations and facilitate the management of translated data. 4. Translatable: Fixed data (e.g. pag ...