我有一些Spring boot REST API，我需要将此控制器的WebSocketController和WebSocketConfig添加到服务器，以便使用REST API + websocket：
当我添加注释@EnableWebSocketMessageBroker来配置和执行服务器时 - 我有一些错误
（在配置附近没有@EnableWebSocketMessageBroker我的服务器可以工作，但是，我认为，如果没有MessageBroker，websocket将无法工作）
应用
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.boot.runApplication
@SpringBootApplication
class SmartHouseServerApplication
fun main(args: Array<String>) {
runApplication<SmartHouseServerApplication>(*args)
}
控制器：
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Controller;
@Controller
class GreetingController {
@MessageMapping("/hello")
@SendTo("topic/hi")
fun hello(string: String): String {
return "hello"
}
}
配置：
import org.springframework.context.annotation.Configuration
import org.springframework.messaging.simp.config.MessageBrokerRegistry
import org.springframework.web.socket.config.annotation.AbstractWebSocketMessageBrokerConfigurer
import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker
import org.springframework.web.socket.config.annotation.StompEndpointRegistry
@Configuration
@EnableWebSocketMessageBroker
class WebSocketConfig : AbstractWebSocketMessageBrokerConfigurer() {
override fun configureMessageBroker(config: MessageBrokerRegistry) {
config.enableSimpleBroker("/topic")
config.setApplicationDestinationPrefixes("/app")
}
override fun registerStompEndpoints(registry: StompEndpointRegistry) {
registry.addEndpoint("/websocket").withSockJS()
}
}
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/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.0.0.M7)
2018-02-22 16:54:41.188 INFO 5388 --- [ main] c.b.s.SmartHouseServerApplicationKt : Starting SmartHouseServerApplicationKt on VKA with PID 5388 (D:\smart-house-server\target\classes started by vka in D:\smart-house-server)
2018-02-22 16:54:41.190 INFO 5388 --- [ main] c.b.s.SmartHouseServerApplicationKt : No active profile set, falling back to default profiles: default
2018-02-22 16:54:41.223 WARN 5388 --- [kground-preinit] o.s.h.c.j.Jackson2ObjectMapperBuilder : For Jackson Kotlin classes support please add "com.fasterxml.jackson.module:jackson-module-kotlin" to the classpath
2018-02-22 16:54:41.234 INFO 5388 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@4fb61f4a: startup date [Thu Feb 22 16:54:41 EET 2018]; root of context hierarchy
2018-02-22 16:54:41.381 WARN 5388 --- [kground-preinit] o.s.h.c.j.Jackson2ObjectMapperBuilder : For Jackson Kotlin classes support please add "com.fasterxml.jackson.module:jackson-module-kotlin" to the classpath
2018-02-22 16:54:41.918 ERROR 5388 --- [ main] o.s.boot.SpringApplication : Application startup failed
java.lang.IllegalStateException: Error processing condition on org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration.propertySourcesPlaceholderConfigurer
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:64) ~[spring-boot-autoconfigure-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.context.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:109) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:179) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:141) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:117) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:328) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:233) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:273) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:93) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:693) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:531) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:138) ~[spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:751) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:387) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1245) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1233) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at com.bellkross.smarthouseserver.SmartHouseServerApplicationKt.main(SmartHouseServerApplication.kt:12) [classes/:na]
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurationSupport] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:659) ~[spring-core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:556) ~[spring-core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:569) ~[spring-core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:541) ~[spring-core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:599) ~[spring-core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:728) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:669) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:637) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1489) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1007) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.addBeanTypeForNonAliasDefinition(BeanTypeRegistry.java:168) ~[spring-boot-autoconfigure-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.addBeanType(BeanTypeRegistry.java:157) ~[spring-boot-autoconfigure-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.updateTypesIfNecessary(BeanTypeRegistry.java:207) ~[spring-boot-autoconfigure-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.autoconfigure.condition.BeanTypeRegistry.getNamesForType(BeanTypeRegistry.java:114) ~[spring-boot-autoconfigure-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.collectBeanNamesForType(OnBeanCondition.java:265) ~[spring-boot-autoconfigure-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getBeanNamesForType(OnBeanCondition.java:254) ~[spring-boot-autoconfigure-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchingBeans(OnBeanCondition.java:196) ~[spring-boot-autoconfigure-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.autoconfigure.condition.OnBeanCondition.getMatchOutcome(OnBeanCondition.java:115) ~[spring-boot-autoconfigure-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.autoconfigure.condition.SpringBootCondition.matches(SpringBootCondition.java:47) ~[spring-boot-autoconfigure-2.0.0.M7.jar:2.0.0.M7]
... 17 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/springframework/messaging/simp/user/SimpUserRegistry
at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_161]
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_161]
at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_161]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:641) ~[spring-core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
... 35 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.messaging.simp.user.SimpUserRegistry
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_161]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_161]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) ~[na:1.8.0_161]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_161]
... 39 common frames omitted
2018-02-22 16:54:41.924 INFO 5388 --- [ main] ConfigServletWebServerApplicationContext : Closing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@4fb61f4a: startup date [Thu Feb 22 16:54:41 EET 2018]; root of context hierarchy
2018-02-22 16:54:41.926 WARN 5388 --- [ main] o.s.boot.SpringApplication : Unable to close ApplicationContext
java.lang.IllegalStateException: Failed to introspect Class [org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurationSupport] from ClassLoader [sun.misc.Launcher$AppClassLoader@18b4aac2]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:659) ~[spring-core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:556) ~[spring-core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:569) ~[spring-core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:541) ~[spring-core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:599) ~[spring-core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:728) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:669) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:637) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1489) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:421) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:391) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:512) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:504) ~[spring-beans-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1194) ~[spring-context-5.0.2.RELEASE.jar:5.0.2.RELEASE]
at org.springframework.boot.SpringApplication.getExitCodeFromMappedException(SpringApplication.java:879) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.getExitCodeFromException(SpringApplication.java:865) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.handleExitCode(SpringApplication.java:851) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:802) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:339) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1245) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1233) [spring-boot-2.0.0.M7.jar:2.0.0.M7]
at com.bellkross.smarthouseserver.SmartHouseServerApplicationKt.main(SmartHouseServerApplication.kt:12) [classes/:na]
Caused by: java.lang.NoClassDefFoundError: org/springframework/messaging/simp/user/SimpUserRegistry
at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_161]
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_161]
at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_161]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:641) ~[spring-core-5.0.2.RELEASE.jar:5.0.2.RELEASE]
... 21 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.messaging.simp.user.SimpUserRegistry
at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_161]
at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_161]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338) ~[na:1.8.0_161]
at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_161]
... 25 common frames omitted
Process finished with exit code 1
的pom.xml：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.smth</groupId>
<artifactId>smth</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.M7</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<kotlin.compiler.incremental>true</kotlin.compiler.incremental>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<kotlin.version>1.2.10</kotlin.version>
</properties>
<dependencies>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>20.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jre8</artifactId>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-reflect</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.2.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.2.2.Final</version>
</dependency>
<!-- web socket -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-messaging</artifactId>
<version>4.0.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
<version>1.5.10.RELEASE</version>
</dependency>
</dependencies>
<build>
<sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory>
<testSourceDirectory>${project.basedir}/src/test/kotlin</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<artifactId>kotlin-maven-plugin</artifactId>
<groupId>org.jetbrains.kotlin</groupId>
<configuration>
<compilerPlugins>
<plugin>spring</plugin>
</compilerPlugins>
</configuration>
<dependencies>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-allopen</artifactId>
<version>${kotlin.version}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
<pluginRepository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
</pluginRepositories>
</project>
我的实施中有什么问题？ （抱歉我的英语不好）
答案 0 :(得分：0)
我解决了问题
maven中的spring-messaging版本是4.0.0.RELEASE
更改为4.2.4RELEASE后，它开始工作
答案 1 :(得分：0)
尝试在 pom.xml 中添加以下依赖项：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
答案 2 :(得分：0)
您的 pom.xml 中需要以下依赖项：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>stomp-websocket</artifactId>
<version>2.3.3</version>
</dependency>