Spring boot 无法构造Spring webClient，因为java.lang.IllegalStateException:未找到合适的默认ClientHttpConnector

我想在我的服务类中使用特定的

WebClient

。我在构造它时遇到此异常：

看起来这是一个依赖性问题，但是一个好的旧的干净安装并没有改变任何东西

我是否需要在配置中手动指定Bean

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.***.Client]: Constructor threw exception; nested exception is java.lang.IllegalStateException: No suitable default ClientHttpConnector found
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:213)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:117)
        at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:310)
        ... 122 more
    Caused by: java.lang.IllegalStateException: No suitable default ClientHttpConnector found
        at org.springframework.web.reactive.function.client.DefaultWebClientBuilder.getOrInitConnector(DefaultWebClientBuilder.java:266)
        at org.springframework.web.reactive.function.client.DefaultWebClientBuilder.build(DefaultWebClientBuilder.java:244)
        at com.***.Client.<init>(Client.kt:35)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at kotlin.reflect.jvm.internal.calls.CallerImpl$Constructor.call(CallerImpl.kt:41)
        at kotlin.reflect.jvm.internal.KCallableImpl.call(KCallableImpl.kt:106)
        at kotlin.reflect.jvm.internal.KCallableImpl.callDefaultMethod$kotlin_reflection(KCallableImpl.kt:152)
        at kotlin.reflect.jvm.internal.KCallableImpl.callBy(KCallableImpl.kt:110)
        at org.springframework.beans.BeanUtils$KotlinDelegate.instantiateClass(BeanUtils.java:788)
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:185)

在我的

pom.xml

文件中：

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>org.springframework.ws</groupId>
            <artifactId>spring-ws-core</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webflux</artifactId>
        </dependency>

org.springframework.boot
弹簧启动机tomcat
假如
org.springframework.boot
SpringBootStarterWeb
org.springframework.boot
弹簧靴启动器jdbc
org.springframework.boot
弹簧启动安全
org.springframework.boot
春季启动邮件
org.springframework.boot
弹簧启动装置
org.springframework.boot
弹簧起动试验
测试
org.springframework.boot
弹簧靴开发工具
真的
org.springframework.ws
SpringWS核心
org.springframework
春季网络流量

我发现了问题：结果是netty依赖项丢失了，因为我导入了maven工件，该工件具有

WebClient

，但其余的都没有

替换：

<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-webflux</artifactId>
</dependency>

org.springframework
春季网络流量

与：

org.springframework.boot
弹簧启动器webflux

---

解决了它。

作为Léo Schenider答案的替代方案，您不需要用spring boot starter webflux替换spring webflux（添加了一些您不需要的附加依赖项），您只需要包括：

<dependency>
    <groupId>io.projectreactor.netty</groupId>
    <artifactId>reactor-netty-http</artifactId>
</dependency>

伊奥·内蒂
反应堆网络http

---

让spring webflux保持原样。

谢谢。我错过了spring boot starter webflux依赖项我已经添加了依赖项，如上所述，但meDid的问题仍然存在。你重新加载maven项目吗？这甚至修复了我在wildfly

io.projectreactor.netty:reactor netty

以及

org上的问题。springframework:spring webflux

依赖项对我有效。

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-webflux</artifactId>
</dependency>

<dependency>
    <groupId>io.projectreactor.netty</groupId>
    <artifactId>reactor-netty-http</artifactId>
</dependency>