RESTEasy客户端+NoSuchMethodError

Question

我正在尝试编写简单的RESTEasy客户端。下面给出了示例代码：

Client client = ClientBuilder.newBuilder().build();
WebTarget target = client.target("http://localhost:8080/context/path");
Response response = target.request().post(Entity.entity(object, "application/json"));

//Read output in string format
String value = response.readEntity(String.class);

我在行中得到异常：

Client client = ClientBuilder.newBuilder().build();

我在控制台中看到以下错误：

16:07:57,678 ERROR [stderr] (http-localhost/127.0.0.1:8080-1) java.lang.NoSuchMethodError: org.jboss.resteasy.spi.ResteasyProviderFactory.<init>(Lorg/jboss/resteasy/spi/ResteasyProviderFactory;)V

16:07:57,679 ERROR [stderr] (http-localhost/127.0.0.1:8080-1)   at org.jboss.resteasy.client.jaxrs.internal.ClientConfiguration.<init>(ClientConfiguration.java:44)

16:07:57,680 ERROR [stderr] (http-localhost/127.0.0.1:8080-1)   at org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder.build(ResteasyClientBuilder.java:317)

16:07:57,680 ERROR [stderr] (http-localhost/127.0.0.1:8080-1)   at org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder.build(ResteasyClientBuilder.java:49)

  <dependency>
      <groupId>org.jboss.resteasy</groupId>
      <artifactId>resteasy-client</artifactId>
      <version>3.0.8.Final</version>
  </dependency>

更新：我还尝试在POM中添加resteasy jax-rs依赖关系。我还通过在web.xml中添加以下行来验证是否启用了ResteasyProviderFactory：

  <listener>
    <listener-class>org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap</listener-class>
  </listener>

请查看以下maven依赖项列表：

<dependencies>

    <dependency>
        <groupId>org.jboss.spec.javax.ejb</groupId>
        <artifactId>jboss-ejb-api_3.1_spec</artifactId>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>javax.enterprise</groupId>
        <artifactId>cdi-api</artifactId>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>org.hibernate.javax.persistence</groupId>
        <artifactId>hibernate-jpa-2.0-api</artifactId>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>org.jboss.resteasy</groupId>
        <artifactId>resteasy-jaxrs</artifactId>
        <version>3.0.8.Final</version>
        <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>org.jboss.resteasy</groupId>
      <artifactId>resteasy-client</artifactId>
      <version>3.0.8.Final</version>
    </dependency>

    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>2.2.4</version>
    </dependency>

    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.jboss.arquillian.junit</groupId>
        <artifactId>arquillian-junit-container</artifactId>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.jboss.arquillian.protocol</groupId>
        <artifactId>arquillian-protocol-servlet</artifactId>
        <scope>test</scope>               
    </dependency>

</dependencies>

但这不起作用。

<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure>
   <deployment>
       <exclude-subsystems>
           <subsystem name="resteasy"/>
       </exclude-subsystems>
     <exclusions>
       <!-- <module name="org.apache.log4j" /> -->
       <module name="org.apache.commons.logging"/>
       <module name="org.jboss.as.jaxrs"/>
       <module name="org.jboss.resteasy.resteasy-jaxrs"/>
       <module name="org.jboss.resteasy.resteasy-cdi"/>
       <!-- <module name="org.jboss.resteasy.jackson-provider"/>
       <module name="org.jboss.resteasy.resteasy-atom-provider"/>
       <module name="org.jboss.resteasy.resteasy-hibernatevalidator-provider"/>
       <module name="org.jboss.resteasy.resteasy-jaxb-provider"/>
       <module name="org.jboss.resteasy.resteasy-jettison-provider"/>
       <module name="org.jboss.resteasy.resteasy-jsapi"/>
       <module name="org.jboss.resteasy.resteasy-multipart-provider"/>
       <module name="org.jboss.resteasy.resteasy-yaml-provider"/>
       <module name="org.codehaus.jackson.jackson-core-asl"/>
       <module name="org.codehaus.jackson.jackson-jaxrs"/>
       <module name="org.codehaus.jackson.jackson-mapper-asl"/>
       <module name="org.codehaus.jackson.jackson-xc"/>
       <module name="org.codehaus.jettison"/>
       <module name="javax.ws.rs.api"/> -->
     </exclusions>
   </deployment>
 </jboss-deployment-structure>

但现在我看到了其他方法的类似异常：

Caused by: java.lang.NoSuchMethodError: javax.ws.rs.core.Response.readEntity(Ljava/lang/Class;)Ljava/lang/Object;
    at com.example.data.DemoProxyBean.callDemoTx(DemoProxyBean.java:59) [demo-service.jar:]
    at com.example.data.DemoProxyBean$Proxy$_$$_WeldClientProxy.callDemoTx(DemoProxyBean$Proxy$_$$_WeldClientProxy.java) [demo-service.jar:]

我在行中看到了这个例外：

String value = response.readEntity(String.class);

奇怪的是，当我在调试时检查“response.readEntity（String.class）”时，我可以看到字符串值。但当我尝试转到下一行时，我看到了这个错误。你能给我指点一下吗？问题是什么？

Answer 1

这些问题是由于应用程序和Jboss EAP模块之间的Resteasy客户机实现版本不同造成的。您使用的是最新版本的jaxrs-client，但JBoss EAP 6.3.0使用的是非常旧的版本(resteasy-jaxrs-2.3.8.final-redhat-3)。

只需下载最新的JBoss Resteasy实现包（如下所示：resteasy-jboss-modules-3.0.9.final.zip）并解压到EAP Modules文件夹中，替换现有文件Modules.xml并添加新的JAR。记住，从ZIP替换所有jar（不仅仅是resteasy-jaxrs）。