Programming VIP

Consumers who implement RabbitMQ have two modes: Push and Pull.The recommended way to implement push mode is to inherit DefaultConsumer base class, or use Spring AMQP's SimpleMessageListenerContainer.Push mode is the most commonly used, but it is not applicable in some cases, such as:Due to certain restrictions, consumers can only consume mess ...

In fact, the configuration mode of spring boot interceptor is similar to that of spring MVC. Only a few small changes need to be noticed. Here are two kinds of commonly used interceptors: I. Interceptor Based on URL: public class LoginInterceptor extends HandlerInterceptorAdapter{ /** * Call before request processing (before Controll ...

The concept of AOP should be familiar to anyone who has used spring. In Dojo, AOP is also supported. I don't know if there is AOP support for other JavaScript frameworks and libraries. AOP is also called face-to-face programming. Students who have used spring must be very familiar with AOP. In js, AOP is a technology point that has been seriou ...

Looking at the spring source these days, which covers where spring starts, let's see where spring actually started loading.This article uses spring3.0M3 The first spring load will go directly to the web.xml file with the help of a listener, ContextLoaderListener <listener> <listener-class>org.springframework.web.conte ...

This scheme only needs the code modification of the server Because now we want to separate the front end and the back end, there must be cross domain problems. Here are the effective codes we have tested: Steps: I. add in the web.xml file <!-- 2019-01-15 Solve cross domain problems --> <filter> <filter-name>cros ...

Some configuration parameters during development and after going online are not available, such as database connection, SMS verification, etc springboot provides us with a way to differentiate environment configuration Different environment configurations for the same profile Three bars can be used in the same configuration file application.yml ...

Override remote configuration properties By default, Spring Cloud is allowed to be overridden, spring.cloud.config.allowOverride=trueAdjust the value to "false" through the program start parameter --spring.cloud.config.allowOverride=true After startup, Postman sends POST request again, and adjusts the value of spring.application.name ...

Preface Spring is translated into Chinese as "spring". Indeed, in a certain period of time, it has brought spring to Java developers. However, with the expansion of our project scale, there are more and more places where spring needs to be configured. To exaggerate, "configuration takes two hours, Coding takes five minutes". ...

Before the project, it ran well. As a result, after other related modules updated the code, the project startup reported an error 2019-12-06 08:55:13 [main] ERROR o.s.boot.SpringApplication - Application startup failed java.lang.NullPointerException: null at org.springframework.beans.factory.support.DefaultListableBeanFactory$FactoryAwareOr ...

I. prototype mode 1. What is prototype mode Clone The prototype pattern is a creation pattern. The word "prototype" indicates that there should be a template instance for the schema change. Users copy an object with consistent internal properties from the template object. This process is also called "cloning". The copied ins ...