线程“main”中的异常java.lang.NoClassDefFoundError：无法初始化类com.sun.jersey.core.header.MediaTypes [英] Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class com.sun.jersey.core.header.MediaTypes
问题描述
我正在尝试运行一个球衣客户端并面临这个问题。
I'm trying to run a jersey client and facing this issue.
WS等级：
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
@Path("/hello")
public class HelloWorldService {
@GET
@Path("/vip")
@Produces(MediaType.APPLICATION_JSON)
public Response getMsg(@QueryParam("msg") String msg) {
String output = "Jersey say : " + msg;
return Response.status(200).entity(output).build();
}
}
客户类别：
import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
public class JerseyClientGet {
public static void main(String[] args) {
try {
Client client = Client.create();
WebResource webResource = client
.resource("http://localhost:8080/TestRest/rest/hello/vip?msg=ABCD");
ClientResponse response = webResource.accept("application/json")
.get(ClientResponse.class);
if (response.getStatus() != 200) {
throw new RuntimeException("Failed : HTTP error code : "
+ response.getStatus());
}
String output = response.getEntity(String.class);
System.out.println("Output from Server .... \n");
System.out.println(output);
} catch (Exception e) {
e.printStackTrace();
}
}
}
问题是当我尝试执行客户端类时，出现以下错误消息
Issue is when I'm trying to execute the Client Class, following error message is coming
Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class com.sun.jersey.core.header.MediaTypes
at com.sun.jersey.core.spi.factory.MessageBodyFactory.initReaders(MessageBodyFactory.java:182)
at com.sun.jersey.core.spi.factory.MessageBodyFactory.initReaders(MessageBodyFactory.java:176)
at com.sun.jersey.core.spi.factory.MessageBodyFactory.init(MessageBodyFactory.java:162)
at com.sun.jersey.api.client.Client.init(Client.java:342)
at com.sun.jersey.api.client.Client.access$000(Client.java:118)
at com.sun.jersey.api.client.Client$1.f(Client.java:191)
at com.sun.jersey.api.client.Client$1.f(Client.java:187)
at com.sun.jersey.spi.inject.Errors.processWithErrors(Errors.java:193)
at com.sun.jersey.api.client.Client.<init>(Client.java:187)
at com.sun.jersey.api.client.Client.<init>(Client.java:159)
at com.sun.jersey.api.client.Client.create(Client.java:669)
at com.mkyong.client.JerseyClientGet.main(JerseyClientGet.java:12)
我正在使用以下罐子：
asm-3.1.jar，
jackson-core -asl-1.9.2.jar，
jackson-jaxrs-1.9.2.jar，
jackson-mapper-asl-1.9.2.jar，
jackson-xc-1.9.2 .jar，
jersey-bundle-1.8.jar，
jersey-client-1.18.jar，
jersey-core-1.18.jar，
jersey-json-1.18.jar ，
jersey-server-1.18.jar，
jersey-servlet-1.18.jar，
jettison-1.1.jar，
jsr311-api-1.1.1.jar
推荐答案
一般来说你会得到这个专业版当您的代码针对jersey-bundle-1.8.jar和jsr311-api-0.9.jar编译时出现错误。但在这里我可以看到你正在使用 jsr311-api-1.1.1.jar 。然后下一个问题是应用程序/ Web服务器将加载旧的jar文件。例如：GlassFish 3.1一个附带Jersy 1.5（可能优先于你的库）。
Generally you would get this problem when your code compiled against jersey-bundle-1.8.jar and jsr311-api-0.9.jar. But here I can see you are using jsr311-api-1.1.1.jar. Then next problem would be older jar file would have been loaded by the application/web server. For eg: GlassFish 3.1 one comes with Jersy 1.5( which may take precedence over your libraries).
理想情况下你需要检查加载的JSR-311库的版本（服务器中的0.9版本的jsr311-api jar已经过时了。
您应该针对jersey-bundle-1.8.jar进行编译，并使用jersey-bundle-1.8.jar和jsr311-api-1.1.1.jar运行
Ideally you would need to check version of JSR-311 library is loaded (0.9 version of the jsr311-api jar is obsolete) in the server. And you should compile against jersey-bundle-1.8.jar, and run with jersey-bundle-1.8.jar and jsr311-api-1.1.1.jar
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