the task performed every minute is to query the data with a status of 1 from the database, and update the data (related tables) if it exists, otherwise it will not be processed, such a simple scheduled task, but will this execution per minute affect performance?
get a database connection pool. The database link is basically fine.
also depends on the database data. Do not operate frequently if you have too much.
or separate the updated data from the data with a status of 1. Avoid too much data.
I'd better use python to run a scheduled task on the server
now I want to get a content-type=application json callback data. Oddly enough, I can t get the data using @ RequestBody, as shown in the following code: @Data public class BaiduDocNofityResponse { private String messageId; private String messa...
Caused by: java.lang.IllegalArgumentException: Could not resolve placeholder alipay.app_id in value "${alipay.app_id}" Project structure I wrote it in application.properties before it was not configured. I can get the value by using...
use springboot + shiro for permission control, and access will be redirected to login.jsp when you are not logged in. If the front and back ends are separated and nginx is used as a proxy, cross-domain problems will occur. : ...
the .xml file of mybatis in spring-boot can only be placed under resources mappper, like this: put together with the interface, not uniformly placed under the resources mapper, separate, easy to manage. thanks! ...
the image of centos7 starting springboot always indicates that the port is occupied, but I m pretty sure that the port is not occupied, and the other port is still occupied which god knows what s going on ...
how does SpringBoot access the page? I returned the string "login " at controller. It didn t access the login.html page. Do I need to add thymeleaf dependencies? ...
I am a java rookie, ask some rookie questions? use spring-boot to develop projects, spring-data-jpa to access databases, there are many fields in the database, but only some of them are used by the client, while the data needed by the background is ...
such as the title. such as the title. such as the title. ...
use IDEA s Spring Initializr to initialize Spring-Boot project defaults to application.properties as configuration file, and I want to use yml . After I create a new application.yml under resource , as shown below. The yml file has no input...
learn the problems encountered when the converter: now the time to convert the String format sent from the foreground into the date format, the converter only specifies the format before conversion string and the format after conversion date, but the fo...
@Bean public HttpMessageConverters fastJsonHttpMessageConverters() { 1convert FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter(); 2fastjsonjson; FastJsonConfig fastJsonConfig = new Fast...
use springBootTest for unit test. The unit test code is as follows. @ SpringBootTest annotation scans all components, including @ Aspect annotated components. Note 1 is a service and performs database operations @RunWith(SpringJUnit4ClassRunner.cla...
https: github.com thymeleaf . I use jpa, to cascade the two classes through annotations. in the html page, when you get the object of any class through the thymeleaf tag, it will appear . java.lang.StackOverflowError: null at sun.reflect.misc.Refl...
Springboot application visits database. Error: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any enter the con...
thymeleaf 2.+ requires < script th:inline= "javascript " > declare this Is there a better way after thymeleaf3? can the declaration be omitted? I read the document saying that it is recommended to remove . Template updates remove any th:inline= ...
when I actually use it, it s not what the documentation says. my thymeleaf version The code calls the tostring method of the class in this way <script> console.log([[${games}]]) < script> chorme console: an error will be prompted, b...
one class @Entity public class Shuo{ @Id @GeneratedValue private int id; private String title; private Date date; String content; @ManyToOne(cascade = CascadeType.REFRESH) @JoinColumn(name = "user_id") private User user; : @OneT...
such as the title. background controller: @RequestMapping("generatorOrder") public TMessage generatorOrder(Order order) { ... } order class: public class Order implements Serializable { private Long orderId; ...
for example, ask for documents that can be run by combining springboot2 with mysql and mongodb at the same time ...
encountered a project, there is a SpringBoot background, the terminal is an embedded chip, the data exchange between the two is required to be binary. Contact with this requirement for the first time, unlike the previous interaction with the mobile phone...