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@TOC # Spring Series Record every step in the program u auth:huf Reply: In the front of the article, I will reply to some students'questions. Note that if the return return value is not written when using InstantiationAwareBeanPostProcessor;This is in the process of creating objects;This will cause the @Autowired injection inside the object ...

/** * Bank card verification */ @Target({METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER}) @Retention(RUNTIME) @Documented @Constraint(validatedBy = {StringChecker.class, ObjectChecker.class}) public @interface BankCard { String message() default "Bad format of bank card number"; Class<?>[] groups() default {}; Class& ...

Encryption of user password: during user registration, query whether the user exists in the database according to the transmitted information. If it does not exist, encrypt its password. The encrypted information is stored in the database. When logging in, encrypt the login password again and verify it with the encrypted information in the data ...

Example code cloud address https://gitee.com/zhang-xin-1/springcloud1   1, Create Eureka project module Create eureka project   Create a spring Lnitializr project Direct search import Eureka dependency     Configuration dependency pom.xml <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apac ...

IoC, the core of Spring IoC control reverses the permission of Inverse of Control to create objects. Objects needed in Java programs are no longer created by programmers, but are created by IoC containers. IoC core idea Implement IoC in the way of Java Web 1,pom.xml <dependencies> <!-- introduce Servlet rely on --> ...

1. Introduction When an application is running in a production environment, it is necessary to monitor its health. By understanding the health of the application in real time, you can get a warning before the problem occurs, and you can solve the problem before the customer notices the problem. In this article, we will create a Spring Boot ap ...

Operation principle of SpringBoot Since I wrote the first SpringBoot program, I have touched the fish for a few days. Now I come back to study the operation principle of SpringBoot! 1. Dependent file pom Previously, SpringBoot created a Maven project, so the corresponding configuration file pom.xml must contain all the dependencies required ...

In the previous section, we talked about the working principle and source code analysis of automatic injection (byName,byType) and @ Autowired annotation in Spring. Today, we will analyze the remaining core methods: @Nullable Object resolveDependency(DependencyDescriptor descriptor, @Nullable String requestingBeanName, @Nullable Set<S ...

SSM mybatis usage process Official teaching Mybatis usage process 1. Import the coordinates of jar or mvan <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>provided</scope> </dependency> <dependency> <groupId&gt ...

JDBC 1. Functions of JDBC module: Responsible for database resource management and error management, which simplifies the operation of developers on the database. 2,JdbcTemplate: The Spring framework provides this class, which is the basis of the data abstraction layer of the Spring framework and the core class of Spring JDBC. 3. The JDBC ...