Question

我将此部分代码作为示例：

public SapRestClient(final String scheme, final String host, 
  final int port, final String username, final String password, 
  final HttpClientConnectionManager connectionManager, 
  final RequestConfig requestConfig) {

final BasicCredentialsProvider credentialsProvider = 
  new BasicCredentialsProvider(); 
credentialsProvider.setCredentials(authscope, credentials);

final CloseableHttpClient httpClient =
  HttpClientBuilder.create().setDefaultCredentialsProvider(credentialsProvider)
  .setConnectionManager(connectionManager)
  .setDefaultRequestConfig(requestConfig).build();

final HttpComponentsClientHttpRequestFactory requestFactory = 
  new HttpComponentsClientHttpRequestFactory(httpClient);
final BufferingClientHttpRequestFactory bufferingRequestFactory = 
  new BufferingClientHttpRequestFactory(requestFactory;
this.restTemplate = new RestTemplate(bufferingRequestFactory);

我会在Spring做这样的事情。我写了这段代码：

<bean id="requestConfigBuilder" class="org.apache.http.client.config.RequestConfig"
        factory-method="custom">
        <property name="socketTimeout" value="5000" />
        <property name="connectTimeout" value="5000" />
    </bean>

    <bean id="requestConfig" factory-bean="requestConfigBuilder"
        factory-method="build" />

    <bean id="connectionManager"
        class="org.apache.http.conn.HttpClientConnectionManager">
        <property name="maxTotal" value="30" />
        <property name="defaultMaxPerRoute" value="50" />
    </bean>

    <bean id="credentialsProvider" class="org.apache.commons.httpclient.auth.CredentialsProvider"/>


    <bean id="httpClientBuilder" class="org.apache.http.impl.client.HttpClientBuilder"
        factory-method="create">
        <property name="defaultRequestConfig" ref="requestConfig" />
        <property name="defaultConnectionManager" ref="connectionManager"/>
        <property name="defaultCredentialsProvider" ref="credentialsProvider"/>
    </bean>

    <bean id="httpClient" factory-bean="httpClientBuilder"
        factory-method="build" />

    <bean id="requestFactory" factory-bean="httpComponentsClientHttpRequestFactory">
        <property name="defaultHttpClient" ref="httpClient"/>
    </bean>

    <bean id="bufferingRequestFactory" factory-bean="bufferingClientHttpRequestFactory">
        <property name="defaultRequestFactory" ref="requestFactory"/>
    </bean>

    <bean id="bufferingClientHttpRequestFactory" class="org.springframework.http.client.BufferingClientHttpRequestFactory"/>

    <bean id="twRestTemplate" class="org.springframework.web.client.RestTemplate">
        <constructor-arg>
            <ref bean="bufferingRequestFactory" />
        </constructor-arg>
        <property name="errorHandler" ref="customErrorHandler" />
    </bean>

我在一个closeableHttpClient中放置了一个connectionManager（带有连接设置）和一个请求配置器来进行超时管理（我看到了这个链接）。我把这个bean放在HttpComponentClientHttpRequestFactory中，然后放在BufferingRequestFactory中，最后放在RestTemplate中。

但是在运行时我得到了这个错误：

WARN [localhost-startStop-1] [CloseAwareApplicationContext]异常在上下文初始化期间遇到 - 取消刷新尝试：org.springframework.beans.factory.BeanCreationException：创建名为'defaultTwProductSearchService'的bean时出错在类路径资源[jkdsfj-spring.xml]中定义：无法解析bean'twNavigatorClientGateway'的引用设置bean属性'twNavigatorClientGateway';嵌套异常是org.springframework.beans.factory.BeanCreationException：创建名为'defaultTwNavigatorClientGateway'的bean时出错在类路径资源[jkdsfj-spring.xml]中定义：设置时无法解析对bean'twRestTemplate'的引用 bean属性'twRestTemplate';嵌套异常是 org.springframework.beans.factory.BeanCreationException：错误在类路径中定义名为'twRestTemplate'的bean 资源[joggrouptwconnector-spring.xml]：无法解析引用设置构造函数参数时bean'bufferingRequestFactory'; 嵌套异常是 org.springframework.beans.factory.BeanCreationException：错误在类中定义名为'bufferingRequestFactory'的bean path resource [jkdsfj-spring.xml]：bean的实例化失败;嵌套异常是java.lang.IllegalStateException：没有bean bean定义上指定的类

我哪里错了？

Answer 1

Not sure what version of spring-web you are using. I've looked at spring-web.4.x. The BufferingClientHttpRequestFactory accepts a constructor argument. So, you can create one without a factory-bean using the constructor-arg

<bean id="bufferingRequestFactory" class="org.springframework.http.client.BufferingClientHttpRequestFactory"/>
    <constructor-arg>
        <ref bean="requestFactory" />
    </constructor-arg>
</bean>

You may have to do the same for HttpCompnentsClientHttpRequestFactory.

通过Spring注入RestTemplate

1 个答案: