problem description I want to update the mongodb database and store an array with some deleted elements in mongodb, but when at least two threads perform this task at the same time, there is a second kind of update loss problem, such as the original a...
cannot find the configuration point for the web project, version is 2.0.5.RELEASE ...
when I introduce spring-boot-starter-web, I will introduce spring-boot-autoconfigure s jar package. Spring is to scan the contents of the spring.factories file under the META-INF of all jar packages under the project and then add the automatic configur...
problem description: I bought a machine, Aliyun s lightweight server. It s equipped with pagoda software. wrote a springBoot program by himself, which was successfully deployed to it, and the port of the firewall was opened. But I just can t access...
package com.example.demoeurekaserver; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer; @EnableEurekaServer...
there are all kinds of on the Internet. for example, some people put both JpaRepository and entity in domain there are JpaRepository and mapper in the dao directory and repository and mapper in separate directories which is elegant and reasonable...
problem description now there is a requirement that background management can switch the language of the system, rather than automatically depending on the user s region. It is somewhat similar to Wordpress s language choice, as shown in figure ...
the project structure is as follows: load Velocity code: @Bean public VelocityEngine getVelocityEngine() throws IOException { logger.info("MyWebMvcConfiguration VelocityEngine"); return getVelocityConfigurer().getVelocityEngine()...
problem description when springboot+dubbo annotations are used in the configuration development of the project, there is no problem with starting the project normally, but when I was writing the unit test, I found that the attribute marked @ Reference...
I used idea to develop, File Encodings with Transparent native-to-ascii conversion set to true. There is such a configuration in the configuration file test.bank= Bank of China , no problem compiling and running on idea. after packaging, open it in n...
I use spring-session and redis to share session, and then report the following error. It looks as if spring-context-5.0.7.RELEASE and spring-session-1.3.3.RELEASE are in conflict, but I didn t directly quote whether spring-context, is in some stater pa...
the springboot project takes the session, and stuffs something into it. Why is there nothing in the attribute in the session I get every time? Code: @ RestController public class Controller { public void a(HttpSession session) throws InterruptedExc...
using Kotlin to develop Spring Boot is to find the following problems. How to solve them? ] ...
what if I use this annotation in the variable parameter of a method, and then the variable reports an error when it is null? ...
I would like to ask how to use actuator, in non-WEB projects, such as some message consumption services, background job services. There is no need to have WEB function, how to use actuator in this case, can it be connected to Spring Boot Admin? ...
I want to use facets to manage all methods with the first parameter HttpServletRequest request under the controller package. Here is my code: @Pointcut("execution(* com.belfry.bequank.controller.*.*(..))&&args(request,..)") public voi...
in a certain method, you want to obtain custom Realm information through getPrincipal (), but all the field information of the obtained entity is null configuration without cache processing, nor does it implement SessionDao . < hr > login code. If you...
first of all, ide idea,jdk 1.8 ide idea,jdk spring cloud version finchley sr5 successfully wrote and started the eurekaserver application according to the online tutorial: write client according to the online tutorial failed to start: client pom: ...
projects use flyway and JPA, which create databases, tables, and relationships between tables. ...
the request header headers for front-end access carries token,. How can I transfer token to user into my method? the following is the result I want: User user is the user, transformed from token @PostMapping("add") @ResponseBody public Comm...
as shown in the following figure, the code for master and hotfix is the same, but it is normal to run the code under hotfix! when you switch to master, you will report some errors. This is why ...
topic description how to change the style of the button after clicking the button in vue? Change the style of the button directly after clicking the button sources of topics and their own ideas write two styles, before and after clicking, to bind ...
javascript determines whether a string is an image path? I have an uncertain string: it could be: http: www.baidu.com (for url address path) or it could be: https: img.codeshelper.com upload img 2021 02 28 pk4nm4innyg1209.png (for picture) how ...
question data of Filter is required const treeData = [ { title: 0-0 , key: 0-0 , children: [ { title: 0-0-0 , key: 0-0-0 , children: [ ...
Dva build the first type: ... import styles from . index.css ; function Index(){ return( <div className={style.index}><div> ) } export default Index; second type: ... import . index.css ; function Index(){ return( &...