由以下原因引起：java.lang.NoSuchMethodError：org.apache.http.conn.ssl.SSLConnectionSocketFactory

Question

我使用Spring Boot，Spring MVC和Spring Web与HttpClient。在尝试在@Configuration类中创建HttpClient对象时，我得到以下代码的异常：

SSLConnectionSocketFactory sslSocketFactory = new SSLConnectionSocketFactory(sslContext, hostnameVerifier);
    Registry<ConnectionSocketFactory> socketFactoryRegistry = RegistryBuilder.<ConnectionSocketFactory>create()
            .register("http", PlainConnectionSocketFactory.getSocketFactory())
            .register("https", sslSocketFactory)
            .build();

POM依赖项

<properties>
  <http.client>4.5.2</http.client>
  <http.core>4.4.4</http.core>
</<properties>
 <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>${http.core}</version>
        </dependency>
<dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>${http.client}</version>
        </dependency>

例外：

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.http.client.HttpClient]: Factory method 'getHttpClient' thr
ew exception; nested exception is java.lang.NoSuchMethodError: org.apache.http.conn.ssl.SSLConnectionSocketFactory.<init>(Ljavax/net/ssl/SSLContext;Ljavax/net
/ssl/HostnameVerifier;)V                                                                                                                                      
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)                            
        at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)                          
        ... 155 more                                                                                                                                          
Caused by: java.lang.NoSuchMethodError: org.apache.http.conn.ssl.SSLConnectionSocketFactory.<init>(Ljavax/net/ssl/SSLContext;Ljavax/net/ssl/HostnameVerifier;)
V                                                                                                                                                             
        at wsclient.RestClientConfig.getHttpClient(RestClientConfig.java:182)                                                         
        at wsclient.RestClientConfig$$EnhancerBySpringCGLIB$$d3a9da1b.CGLIB$getHttpClient$2(<generated>)                              
        at wsclient.RestClientConfig$$EnhancerBySpringCGLIB$$d3a9da1b$$FastClassBySpringCGLIB$$a56984ae.invoke(<generated>)           
        at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)                                                                      
        at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:309)             
        at wsclient.RestClientConfig$$EnhancerBySpringCGLIB$$d3a9da1b.getHttpClient(<generated>)                                      
        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:497)                                                                                                   
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)                            
        ... 156 more 

任何帮助或建议表示赞赏

Answer 1

删除显式的httpcoredependency（它将包含在httpclient中）并执行mvn clean install。如果问题仍然存在，请显示完整的POM，因为您可能安装了与其他东西安装的httpclient冲突版本。

Answer 2

我能够使用此源找到库冲突的来源：

“这很奇怪，也许是从不同的jar加载Apache类。你能尝试运行以下内容并粘贴输出吗？它可能会给我们一个线索，它试图从这里获取这些类：org.apache.http.conn.ssl .SSLConnectionSocketFactory.class.getProtectionDomain（）。getCodeSource（）。的getLocation（）。的getPath（）”

一旦我找到了该位置，它原来是我的/.m2/repository/文件夹中的另一个jar文件，然后我清理了该文件夹，所以现在它引用了/org/apache/httpcomponents/httpclient/4.5.6/httpclient -4.5.6.jar jar。

原始来源：https://github.com/aws/aws-sdk-java/issues/938

Answer 3

我遇到过类似的问题。首先加载了一个旧的httpClient jar。更换那个罐子后，它工作正常。

java.lang.NoSuchMethodError: org.apache.http.conn.ssl.SSLConnectionSocketFactory.(Ljavax/net/ssl/SSLContext;Ljavax/net/ssl/HostnameVerifier;)V