spring-boot

问题 I have a Spring Boot application which is always on guest mode. No login is used. The problem is that the same instance of the application is always used. If the shopping cart is filled with products its still the same when I open it from another browser or device. How can I resolve this? Do I need to use Spring Security? 回答1: You can add spring security with permit all, no login, and it will manage your session automatically for each guest user, and will automatically add a user header

问题 when run the application, it throws IllegalAccessError，Application run failed here is demo aop、service、annotation used，a simple annotation and @Before advice，also enable @EnableAspectJAutoProxy @Target({ElementType.TYPE, ElementType.METHOD}) @Retention(RetentionPolicy.RUNTIME) public @interface MethodInterceptAnnotation { } @Component @Aspect public class MethodInterceptAop { @Before("@target(com.example.demo.aop.MethodInterceptAnnotation)") public void beforeCheck() { System.out.println(

问题 I would like to start creating an application that will use Java on the backend and frontend react and redux. I tried to find a tutorial where it would be described how to start a project that will use these technologies (spring boot, redux 4 and react). Unfortunately, I did not find any such tutorial. Could you please help me and give me some tips how to get started? Thank you. 回答1: you can use Jhipster to create a project and add an appropriate dependency take look at this resource :

问题 I'm having a few issues with Spring Integration and the control bus. I need to turn auto-start off on an InboundChannelAdapter. However when I do this I can't get the ControlBus to start the channel adapter. I've searched for an answer online, but most of the examples use XML configuration. Here is the entirety of my code: package com.example.springintegrationdemo; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.boot.CommandLineRunner; import org

问题 I'm having a few issues with Spring Integration and the control bus. I need to turn auto-start off on an InboundChannelAdapter. However when I do this I can't get the ControlBus to start the channel adapter. I've searched for an answer online, but most of the examples use XML configuration. Here is the entirety of my code: package com.example.springintegrationdemo; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.boot.CommandLineRunner; import org

问题 We have a websphere application server where multiple applications are deployed. All applications use a common property(Key) but have different Value. For example : spring.profiles.active=test in one application, spring.profiles.active=UAT in some other application. Is it possible to pass these different values to the applications during start-up in Websphere ? If we set these values in JVM options in the Generic JVM Arguments text box then it will become same for all the applications which

问题 We have a websphere application server where multiple applications are deployed. All applications use a common property(Key) but have different Value. For example : spring.profiles.active=test in one application, spring.profiles.active=UAT in some other application. Is it possible to pass these different values to the applications during start-up in Websphere ? If we set these values in JVM options in the Generic JVM Arguments text box then it will become same for all the applications which

问题 I have a project with two submodules; one is the data access layer the other is the API service. The data access module uses JOOQ and an autowired DSLContext in a service class. Also, I'm using JUnit 5, and Spring Boot 2.2.4. The QueryService class in the data access module has a member like @Autowired private DSLContext dsl ; The test class is set up like this: @SpringBootTest public class MyServiceTests { @Autowired QueryService service; @Autowired private DSLContext dsl; @Test public void

问题 I am using the Spring Boot Binder API in an EnvironmentPostProcessor (i.e. before the actual application context(s) is (are) refreshed) to bind a custom ConfigurationProperty object. I want users to have to specify exactly one mandatory property in application.yml : com.acme.kafka.service-instance-name: <user-provided value> . Given that, I will be able to derive the other (required but not mandatory to be put in by the user) properties: com: acme: kafka: username: <can be fetched from VCAP

问题 I have a simple producer class defined as follows: @Configuration public class MyKafkaProducer { private final static Logger log = LoggerFactory.getLogger(MyKafkaProducer.class); @Value("${my.kafka.producer.topic}") private String topic; @Autowired KafkaTemplate<String, String> kafkaTemplate; public void sendDataToKafka(@RequestParam String data) { ListenableFuture<SendResult<String, String>> listenableFuture = kafkaTemplate.send(topic, data); listenableFuture.addCallback(new