创建WebClient Bean时出现错误“No qualifying bean of type 'org.springframework.http.client.reactive.ClientHttpConnector' available”

von4xj4u  于 2023-10-15  发布在  Spring
关注(0)|答案(1)|浏览(99)

我需要在现有的Spring项目上使用WebClient。目前的Spring版本是4。我将Spring版本更新为5，因为要使用WebClient，需要Spring 5。
下面是pom.xml中的spring依赖项：

<dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.sun.xml.bind</groupId>
            <artifactId>jaxb-impl</artifactId>
            <version>2.2.4-1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>5.0.1.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webflux</artifactId>
            <version>5.2.15.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>io.projectreactor.netty</groupId>
            <artifactId>reactor-netty</artifactId>
            <version>0.9.20.RELEASE</version>
            <scope>compile</scope>
        </dependency>

新增：spring-web、spring-webflux、reactor-netty。

接下来，我在AppConfig中配置了WebClient bean

@Bean
  public WebClient webClient(@Value("${myservice.endpoint}") String countryServiceUrl, ClientHttpConnector connector) {
    return WebClient.builder()
            .baseUrl(countryServiceUrl)
            .defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
            .clientConnector(connector)
            .build();
  }

下面是项目设置：

public class WebAppInitializer implements WebApplicationInitializer {
private AnnotationConfigWebApplicationContext applicationContext;
@Override
  public void onStartup(final ServletContext servletContext) throws ServletException {
    applicationContext = new AnnotationConfigWebApplicationContext();
    applicationContext.register(AppConfig.class);
    applicationContext.setDisplayName(DISPLAY_NAME);

    // Manage the life cycle of the root application context
    servletContext.addListener(new ContextLoaderListener(applicationContext));

    applicationContext.refresh();
    applicationContext.registerShutdownHook();
  }
}

我正在本地将项目部署到tomcat 9。下面是错误：

WARN  AnnotationConfigWebApplicationContext - Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'createMyMessageConverter': Unsatisfied dependency expressed through field 'myMessageConverter'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'myMessageConverter': Unsatisfied dependency expressed through field ‘myServiceCaller'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘myServiceCaller': Unsatisfied dependency expressed through field ‘someDAO'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘someDAOImpl': Unsatisfied dependency expressed through field 'webClient'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'webClient' defined in com.my.package.config.AppConfig: Unsatisfied dependency expressed through method 'webClient' parameter 1; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.http.client.reactive.ClientHttpConnector' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
06-Oct-2023 07:37:23.262 SEVERE [main] org.apache.catalina.startup.HostConfig.deployWAR Error deploying web application archive [/Users/abhinash.kumar/Downloads/apache-tomcat-9.0.65/webapps/myApp-SNAPSHOT.war]
    java.lang.IllegalStateException: Error starting child
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:729)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:698)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:696)
        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1024)
        at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1911)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
        at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112)
        at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:825)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:475)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1618)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:319)
        at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
        at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:423)
        at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:366)
        at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:946)
        at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:835)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1396)
        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1386)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
        at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
        at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:919)
        at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:265)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        at org.apache.catalina.core.StandardService.startInternal(StandardService.java:432)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:772)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:345)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:476)
    Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/myApp-SNAPSHOT]]
        at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:440)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:726)
        ... 37 more
    Caused by: java.lang.NoSuchMethodError: org.springframework.core.annotation.AnnotationUtils.clearCache()V
        at org.springframework.context.support.AbstractApplicationContext.resetCommonCaches(AbstractApplicationContext.java:915)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:575)
        at com.choicehotels.bs.ecb.accountmsgadapter.travelagentadapter.web.WebAppInitializer.onStartup(WebAppInitializer.java:37)
        at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:172)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5219)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        ... 38 more

所以，基本上，这部分似乎是问题所在：通过方法“webClient”参数1表示的不满足的依赖;嵌套异常为org.springframework.beans.factory.NoSuchBeanDefinitionException：没有类型为“org.springframework.http.client.reactive.ClientHttpConnector”的合格Bean可用：
但是，我确实在项目类路径中看到了ClientHttpConnector。图像添加

提前感谢！

spring

1条答案

按热度按时间
thtygnil

thtygnil1#

看起来你没有初始化连接器，正如你从官方spring文档中看到的那样，你需要在插入构建器之前初始化连接器（直接为连接器注入spring的依赖似乎不可取）：

@Bean
public JettyResourceFactory resourceFactory() {
    return new JettyResourceFactory();
}

    @Bean
public WebClient webClient() {

    HttpClient httpClient = new HttpClient();
    // Further customizations...

    ClientHttpConnector connector =
            new JettyClientHttpConnector(httpClient, resourceFactory()); 

    return WebClient.builder().clientConnector(connector).build(); 
}

在这里你可以找到文档：Client-builder
希望对你有帮助。

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