Programmer Group

session management Shiro provides a complete enterprise level session management function, independent of the underlying container (such as web container tomcat), which can be used in both Java Se and Java EE environments. It provides session management, session event monitoring, session storage / persistence, container independent clustering, ...

1, Overview Before reading this article, you should understand the internationalization implementation and principle of SpringBoot. Here is a brief introduction: 1. internationalization Internationalization, also known as i18n (named because the word has 18 English letters from i to n). For some a ...

This is the construction method of UsernamePasswordAuthenticationFilter and the main content of the attemptAuthentication method is in attemptAuthentication public UsernamePasswordAuthenticationFilter() { super(new AntPathRequestMatcher("/login", "POST")); } public Authentication attemptAuthent ...

1, There are four levels of isolation for MySQL InnoDB transactions, and the default is REPEATABLE READ. READ UNCOMMITTED. Another transaction modifies the data but has not yet committed, and the SELECT in this transaction will read the uncommitted data (dirty read). READ COMMITTED. This transaction ...

1: Prepare picture data, a training data, a test data. The structure is as follows: Download the retrain.py program (https://github.com/tensorflow/hub). In the image train under the example folder, if the retrain.py program downloaded from the above link reports an error that cannot be connected during ...

Under normal circumstances, it's more convenient to complete the function in JSP page. Compared with JSP page, it's more convenient to use, and there will be special circumstances. HTML page is needed to display the data, and the data needs to be acquired and displayed dynamically, so js method is us ...

First, learn about the various post processor extensions (1) BeanFactoryPostProcessor - bean factory post-processing Once the BeanFactory standard has been initialized (all BeanDefinition s have been registered after package scanning), this BeanFactory can be postprocessed. (2) BeanDefinitionRegistryPostProcessor - bean Definition Registry Post ...

There are often relationships between objects in life, such as one-to-one, one to many, many to many. For example, there are many students in a Course class who are one to many. In the database, you can add a foreign key to the Student table to point to the class id to indicate that the Student conta ...

Canon SLRs are commonly used in the market. Whether other SLRs are also provided with SDK s has not been searched. Canon SLR generally uses EOS500D, 550D, 600D, 650D and 750D, which are supported by EDSDK. As of the beginning of 2019, Canon's official EDSDK needs to be applied on the official web ...

Scope of bean The annotation Scope of spring Component has several common scenarios, such as singleton, prototype, request, session and global session. This annotation can be used with @ Component and @ Bean. In particular, Scope annotation can be divided into ConfigurableBeanFactory and WebApplicatio ...