function description: when tomcat starts, a thread is started at the same time. Currently, there is no problem with thread startup, but a null pointer exception is caused due to the inability to inject javabean,. The javabean to be injected is encaps...
TbUser user = restTemplate.getForObject("http: moviemodel user {id}",TbUser.class,id); TbUser user = restTemplate.getForObject("http: localhost:8010 user {id}",TbUser.class,id); the first of these two methods is n...
idnullrequiredtrue : even if you try to get the id value using HttpServletRequest, you can t get the print result as null . ...
recently set up a ssm project of my own. I used to use @ Autowired to try @ Resource this time. However, injection always fails when using resource, no error is reported at startup, and null pointer exception is reported at run time. error java.lang...
I can t find the class in the core package after import and compilation. What should I do? ...
public JsonResult add(@Valid Person person, BindingResult bindingResult) { bindingResult.getAllErrors() :;; } ...
what is the weaving of AOP and what does it mean? ask God to answer what "weaving " means in popular words ...
Why store it after the server generates Token ? from the official documents of JWT, we know that, JSON WEB TOKEN consists of three parts: Header Payload Signature here we only talk about the saved content in Payload , quoted from the JWT o...
for example, is there only a proxy object and no target object in an IOC container such as service bean annotated with @ Transactional? ...
it is said that springmvc is thread-safe. I know that stateless objects must be thread-safe. But when Service is injected into Controller, it becomes a stateful object . Is it still thread-safe? public class UserController { } public cla...
now there is database An on a server, in which there is a table aa, that needs to back up the data in this table aa to database B of server b, and the name of the table should be changed from bb, database to mysql, framework to springmvc, data source Dru...
if neither name, nor type, is specified, it is automatically assembled in byName mode; if there is no match, it falls back to an original type for matching, and if there is a match, it is automatically assembled; I would like to ask what the @ Resourc...
RT, I want to run a test, but I always report this error. What s the problem? org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name com.repository.ProductCategoryRepositoryTest : Unsatisfied dependency expr...
the same query, using mongoTemplate will be much slower, using mongodb tool, looking at the execution plan is very fast, the difference is very big ...
public class ScanRegisterBean implements Serializable{ @Min(value = 1) @Max(value = Long.MAX_VALUE) private long id; @NotBlank(groups = {ScanRegister.class, Register.class}) @Length(min = 2, max = 20,groups = {ScanRegister.class, Re...
how to implement distributed websock push in a cluster environment? Ws s session cannot be persisted, so it can only be used as a stand-alone in map. Is there any elegant solution besides nginx s ip_hash? ...
backend code: ,reponseheader,ResponseEntiry; : ; , a.txt,::aaaa: "YWFhYQ== " springrequestMappingHandler: : ask for advice, how to solve it? do you want to change the configuration of handlermapping? I have tried to use ByteArrayHttpMessageConve...
Spring mvc two components: HandlerMapping and HandlerAdapter; HandlerMapping can already help us match the specific controller (Controller)? then why do you need HandlerAdapter?? ...
@Pointcut("execution(public * com.hellobj.tool.data.megersch.controller.Result.*(..))") public void webLog(){} @Before("webLog()") public void doBefore(JoinPoint joinPoint) throws Throwable { LOGGER.info(&quo...
** * * @return list * public List<UserResponseVO> listConditionsAggregations() { TermsAggregationBuilder builder = AggregationBuilders.terms("interests").field("interests"); SearchQuery query = new NativeSearchQuery...
recently, when testing a project created with dva, I used jest+enzyme, to report an error when testing LoginPage components: I simulated store with redux-mock-store, but loading didn t know how to deal with it. Please point out if the question is not...
webpack version 3.10.0 project has been launched, and the common code (global style, third-party library has also been extracted), but the business code is often adjusted slightly according to business needs. Most of the time, it only involves the param...
Unable to fetch update url contents Package Control: Attempting to use Urllib downloader due to WinINet error: Error downloading channel. Operation timed out (errno 12002) during HTTP write phase of downloading https: packagecontrol.io channel_v3.json. ...
github says to modify webpack entry packaging configuration, how to solve it? ...
look at the link description when looking at the paging the blogger says that what is provided at the bottom of the laravel needs to use. I directly use UrlWindow; what s wrong? $window = UrlWindow::make ($posts); public function fetch() { ...