我正在用JAX-rs学习Json。我的Jdk是Java SE 1.8，所以我使用json-lib-jar进行解析
我编写了一个简单的test-get方法。
@GET
@Path("/all")
@Produces(MediaType.APPLICATION_JSON)
public List<String> getAllCustomers() {
JSONArray jsonArray = JSONArray.fromObject( "['json','is','easy']" );
System.out.println( jsonArray );
return jsonArray;
}
它有错误：
15:04:00,308 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 68) MSC000001: Failed to start service jboss.undertow.deployment.default-server.default-host./RSexample: org.jboss.msc.service.StartException in service jboss.undertow.deployment.default-server.default-host./RSexample: java.lang.IllegalArgumentException: RESTEASY003340: Failure parsing MediaType string:
at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:84)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: java.lang.IllegalArgumentException: RESTEASY003340: Failure parsing MediaType string:
at org.jboss.resteasy.plugins.delegates.MediaTypeHeaderDelegate.parse(MediaTypeHeaderDelegate.java:115)
at org.jboss.resteasy.plugins.delegates.MediaTypeHeaderDelegate.fromString(MediaTypeHeaderDelegate.java:20)
at javax.ws.rs.core.MediaType.valueOf(MediaType.java:179)
at org.jboss.resteasy.spi.metadata.ResourceBuilder$ResourceMethodBuilder.parseMediaTypes(ResourceBuilder.java:604)
at org.jboss.resteasy.spi.metadata.ResourceBuilder$ResourceMethodBuilder.produces(ResourceBuilder.java:579)
at org.jboss.resteasy.spi.metadata.ResourceBuilder.processMethod(ResourceBuilder.java:992)
at org.jboss.resteasy.spi.metadata.ResourceBuilder.fromAnnotations(ResourceBuilder.java:780)
at org.jboss.resteasy.spi.metadata.ResourceBuilder.rootResourceFromAnnotations(ResourceBuilder.java:730)
at org.jboss.resteasy.plugins.server.resourcefactory.POJOResourceFactory.<init>(POJOResourceFactory.java:30)
at org.jboss.resteasy.core.ResourceMethodRegistry.addPerRequestResource(ResourceMethodRegistry.java:79)
at org.jboss.resteasy.spi.ResteasyDeployment.registration(ResteasyDeployment.java:445)
at org.jboss.resteasy.spi.ResteasyDeployment.start(ResteasyDeployment.java:258)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.init(ServletContainerDispatcher.java:120)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.init(HttpServletDispatcher.java:36)
at io.undertow.servlet.core.LifecyleInterceptorInvocation.proceed(LifecyleInterceptorInvocation.java:117)
at org.wildfly.extension.undertow.security.RunAsLifecycleInterceptor.init(RunAsLifecycleInterceptor.java:78)
at io.undertow.servlet.core.LifecyleInterceptorInvocation.proceed(LifecyleInterceptorInvocation.java:103)
at io.undertow.servlet.core.ManagedServlet$DefaultInstanceStrategy.start(ManagedServlet.java:250)
at io.undertow.servlet.core.ManagedServlet.createServlet(ManagedServlet.java:133)
at io.undertow.servlet.core.DeploymentManagerImpl$2.call(DeploymentManagerImpl.java:565)
at io.undertow.servlet.core.DeploymentManagerImpl$2.call(DeploymentManagerImpl.java:536)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:42)
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at org.wildfly.extension.undertow.security.SecurityContextThreadSetupAction.lambda$create$0(SecurityContextThreadSetupAction.java:105)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentInfoService$UndertowThreadSetupAction.lambda$create$0(UndertowDeploymentInfoService.java:1508)
at io.undertow.servlet.core.DeploymentManagerImpl.start(DeploymentManagerImpl.java:578)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.startContext(UndertowDeploymentService.java:100)
at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:81)
... 6 more
当我将返回类型更改为下面的JSONArray时，出现了错误。
WFLYCTL0186: Services which failed to start: service jboss.undertow.deployment.default-server.default-host./RSexample: java.lang.NoClassDefFoundError: net/sf/json/JSONArray
我已经在构建路径中包含了Jars。那么，还需要做什么呢？有什么帮助吗？Thx。
首先，我认为您应该从您的rest端点返回javax.ws.rs.core.Response，但您可以尝试以下操作：
@GET
@Path("/all")
@Produces(MediaType.APPLICATION_JSON)
public List<String> getAllCustomers() {
JSONArray jsonArray = new JSONArray("['json','is','easy']");
List<String> list = new ArrayList<>();
for(int i = 0; i < jsonArray.length(); i++){
list.add(jsonArray.get(i).toString());
}
return list;
}