for example, the login and authorization operation to distinguish between the two realm has been implemented, but when logging out with subject.logout (), the authorization and login information of both realm will be cleared at the same time. What if yo...
previously, custom token was used to distinguish realm login operations, but now there is a need that the exits of the two realm do not affect each other. However, when both realm login operations are performed, no matter which realm performs the exit op...
ordinary subclasses inherit the parent class through the extends keyword, so how do the Spring parent container and the Spring MVC child container reflect the parent-child relationship? does the container refer to a class? which class is the Spring co...
use AWS, to visit the Web site deployed on the server. EC2 services are used and web pages in JAVA language are deployed. but I can t access it. I ve tried a lot of methods before asking questions here. 1. Follow the AWS help, open port 80.443, etc....
the company has built a Spring Cloud micro-service framework and now wants to provide a micro-service interface for executing sql statements. the question now is how to design better: 1. The interface parameters should contain the sql statement to be e...
problem description A SSH project that used to use log4j to manage logs needs to be upgraded to log4j2, but has been unable to output sql statements executed by hibernate to the log file. the environmental background of the problems and what methods...
problem description when interfacing with the payment interface, the parameters are encrypted with the private key. The platform uses our public key to verify the signature, and their demo verification is successful. However, after sending the post re...
problem description add in bulk to one page, add edit and delete buttons for each li: now delegate events to edit and delete buttons: <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> ...
screenshot of the article comes from: Spring-SpringMVC parent-son container & AOP uses summary link description ...
the following sql statement is known: select * from a left join b on a.id=b.id where a.x=1 and b.yroom2; this is a very common join table query in the db layer, but if the db layer does not allow the join table query operation, it can only be queri...
problem description A problem encountered in projects today is that multiple projects (portal oa partform) are run in a tomcat, and then load data from the interfaces of these projects. First, call portal index to enter the page, and then call the int...
product (merchandise) is a member variable of a javabean, class that contains another Javabean, that is, category (commodity category), but my database product table stores cid (identification of commodity category) rather than commodity category. In th...
want to open a page without form or processing ...
isn t inheriting abstract classes a necessary abstract method in an implementation? an abstract subclass must implement all abstract methods in the abstract class, otherwise the subclass is also an abstract class. ...
Management interface for operation: some operations take a long time, such as half an hour and an hour to return immediately after clicking the operation button, and other server operations are actively pushed to the front end after the completion of th...
2018-5-14 10:58:50 org.apache.catalina.loader.WebappClassLoader clearReferencesJdbc : The web application [ SCM] registered the JBDC driver [com.alibaba.druid.mock.MockDriver] but failed to unregister it when the web application was stopped. To prevent a...
CPU occupancy is as high as 60-70% for a period of time after tomcat is enabled. Baidu, many people said to check in JavaStack, the following is a few thread information with high occupancy in jstack "ajp-nio-8009-ClientPoller-1" -sharp55 ...
problem description where should the Java thread pool be created? Or whether a thread pool is used for one business, multiple businesses, or the whole project ...
Spring mvc,urlurl java handler; Spring mvcHandlerMappingHandlerAdapter: HandlerMapping(handler), HandlerAdapter; ...
thinking about doing homework. If there is such a check-in system Design according to the paradigm College schedule course schedule (College schedule one to many) teacher schedule Student schedule Teaching schedule (teacher schedule many to many...
how should a like collection system design a data table? I intend to add an array to the user table, put the id of the like content in it, cancel the like, and then remove the id from the array . find a better way ...
for example, there is a server.jar, that I run like this: java -jar server.jar & this runs smoothly, but when you exit the Terminal terminal tool, the operation of server.jar stops. how can I perfectly deploy jar packages that run spring boot gen...
1. Use the springboot,maven project; logback is under resource, can I specify the location of the logback file at startup? Because I don t want to use the default file. similar:-Dserver.port=10080 can specify the same port, I think:-Dxxx.path=logback.x...
problem description I just used the powerful plug-in Grafika . After all, I typed the Chinese font into the picture, and the picture is still displayed in the frame. the environmental background of the problems and what methods you have tried 1. ...
the data obtained by textarea in vue is passed to the backend. When I get the details, I use the API to get the data I passed in earlier. but the data I got is put in the tag, the n newline character is not recognized, and it is still displayed in pl...