spring boot interview questions

ThymeltesysThymelte is a spring Boot Oauth2-based scan login framework that uses PostgreSQL to store data and then slowly supports other relational databases. Even if you don't use the entire framework, you can easily integrate into existing projects by using only the modules.Project Address Https://github.com/jeesun/thymelteI hope you will support us and point out the shortcomings.If you have any

Detailed steps for Spring Boot to start banner customization, springbanner Preface Thanks to everyone, cool programmers who work in unix and linux Command Line environments may also think that command lines are too monotonous, instead, they invented the method of outputting various images using ansii characters in the command line. This is the banner under the command line. Some cool programmers even devel

IntelliJ IDEA creates the Hello World project of spring boot (illustration), intellijspring 1. Open IDEA, choose "New --> Project" 2. Choose "Spring Initializr" 3. Choose java 1.7 version, then next 4. Choose "Web" 5. Fill out the project name, and choose the project location 6. Set" . MvnMvnwMvnw. cmd "File deleted 7. show the project 8. Application: 9. c

Application Startup class:@SpringBootApplication @enableconfigurationproperties@componentscan (basepackages = {"Com.testing"}) public class application { @Bean resttemplate resttemplate () { return new resttemplate (); public static void Main (string[] args) { springapplication.run (application.class, args); System. out. println ("successful Start"); }DAO Layer:Public interface Userrepository extends JparepositoryService layer: Inject an interface that inherits JPA, in the

Use of controller in spring boot and obtain url parameters, springcontroller Add @ RequestMapping to the class to access this method. For example, the address is/hello/say. @ RequestMapping (value = "/hello", method = RequestMethod. GET) is equivalent to @ GetMapping (value = "/hello "). In this way, the url parameter value can be obtained. The result is as follows: Summary The above sect

Configure using redis in Spring boot -- Annotation form, springredis -- Following the template encoding method in the previous article, we used redisEncoding format configuration (1)Encoding format (2) After in-depth study, we found that the annotation form is more useful, saving you some tedious code and making your code look more elegant.For details about how to install the redis server, refer to encodin

Today, we set up the Springboot, and at first encountered a problem, in the helloapplication that I created, @SpringBootApplication could not be introduced by parsing. Access to the data has been resolved by:Should be caused by Springboot's packet conflict. You need to delete the Spring-boot-autoconfigure folder in the Repository\org\springframework\boot direc

spring.resources.static-locations=classpath:/img/Specify the directory location of the custom static files, and multiple separated by commas, Springboot Automatic invalidationScenario 3, creating Staticcontroller class inheritance Webmvcconfigureradapter overriding addresourcehandlers specifying static access to the resource directoryAddresourcehandler represents the interception request, if encountered/IMG request will find the location of the corresponding resource in classpath:/img/, find th

The Spring boot configuration file is detailedSpring boot provides two commonly used configuration files, the properties file and the Yml file. Their role is to modify the default values for spring boot auto-configuration. Compared to the properties file, the Yml file is muc

cancellation, may be 15 minutes, 20 minutes or the like. In this way, inventory can not be released in time, it will affect the singular. The use of delayed messages, in theory, can be done according to the set time, the order cancellation operation.At present, the article about using RABBITMQ to implement delay message, mostly is how to use the RABBITMQ dead-letter queue to achieve, the implementation of the scheme looks very cumbersome and complex, and still use the original RABBITMQ Client A

{ SpringApplication.run(Application.class, args); }}2. Modify Jar as war package formIn the Pom file, add the war package configuration.If not added, the default is the jar package.3. Remove Spring boot built-in TomcatModify your own Tomcat dependency range to provided to prevent collisions with external tomcat.4. Add the War package package pluginIf you're using

First, the preparatory work Items version update or download URL Windows 10 64 guests Slightly IntelliJ idea 2017.1.5 http://www.jetbrains.com/idea/ JDK8 64 guests Http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html Redis 3.2.100 Https://github.com/MSOpenTech/redis/releases Spring-data-redis Jar Package

BackgroundWith the popularity of spring boot, more and more to choose to use Spring boot to send web apps, unlike traditional Web applications that require a war package to publish an app, a spring boot app can package an entire p

packaging and then run, the controller class in the return path can not add "/", as in the following case, to remove the path before the "/":2. Package Picture Server ProjectMy blog uses a small open source image server from GitHub, which is written by spring Boot + MongoDB to package it and upload it to the cloud server.The project was built using the Gradle tool.1) Modify the Build.gradle file in the pro

= "cord", containerFactory="myFactory") public void processMessage(String msg) { System.out.format("Receiving Message: -----[%s]----- \n.", msg); }}Test Case:RabbitmqTest.java@RunWith(SpringJUnit4ClassRunner.class)@SpringBootTest(classes = CordApplication.class)public class RabbitmqTest { @Autowired private Producer producer; //Direct @Test public void sendDirectMsg() { producer.sendDirectMsg("cord", String.valueOf(System.currentTimeMillis())); } //Topic

:43) at Java.lang.reflect.Method.invoke (method.java:498) at org.springframework.a Mqp.rabbit.connection.cachingconnectionfactory$cachedchannelinvocationhandler.invoke ( cachingconnectionfactory.java:955) at Com.sun.proxy. $Proxy 155.queueDeclarePassive (Unknown Source) at Org.springfra Mework.amqp.rabbit.listener.BlockingQueueConsumer.attemptPassiveDeclarations (blockingqueueconsumer.java:615) ... 3 common frames omitted caused by:com.rabbitmq.client.ShutdownSignalException:channel error; P

For more information on how to add DB2 coordinates in a MAVEN project, see: Https://www.cnblogs.com/zifeiy/p/7918554.html The contents of the Application.properties file in the Spring boot project are as follows: # DB Configuration for DB2 spring.datasource.url=jdbc:db2://localhost:50000/SAMPLE spring.datasource.username=zifeiy spring.datasource.password=izzzyc spring.datasource.driver-cl

Font files, loading not outSolution OneThe problem is that Maven is filtering font files and destroying them. ${project.basedir}/src/main/resources true The workaround is to make the following changespom.xml ${project.basedir}/src/main/resources True static/fonts/** ${project.basedir}/src/main/resources false span class= "tag" > static/ Fonts/** This change allows fonts to not be filtered during packaging.Solution IIAnother way is to update the configuration o

After the configuration is complete, the following error is reported: Whitelabel Error Page This application has no explicit mapping for/error, so you are seeing this as a fallback. Thu 15:59:57 CET 2015 There was a unexpected error (Type=not Found, status=404). No message Available Ensure that the items are added in: At StackOverflow finally found the answerhttp://stackoverflow.com/questions/27966602/spring