java.lang.NoSuchMethodError：org.springframework.http.MediaType.getCharset()Ljava / nio / charset / Charset

当我尝试通过ant运行我的TestNG测试时,我得到 java.lang.NoSuchMethodError：org.springframework.http.MediaType.getCharset()Ljava / nio / charset / Charset(请参阅下面的完整例外)

我编译或运行我的Web应用程序没有问题,但无法通过ant运行测试.我很确定这是一个类加载问题,但不确定应该在运行时加载什么类加载.我正在使用Spring 4.3.1和Spring Security 4.1.1.

是否有特定的顺序加载我的罐子,以便使用org.springframework.http.MediaType的“正确”版本？

[testng] org.testng.TestNGException: 
   [testng] An error occurred while instantiating class com.avada.rest.api.GroupsIntTest: org.springframework.http.MediaType.getCharset()Ljava/nio/charset/Charset;
   [testng]     at org.testng.internal.ClassHelper.createInstance1(ClassHelper.java:388)
   [testng]     at org.testng.internal.ClassHelper.createInstance(ClassHelper.java:290)
   [testng]     at org.testng.internal.ClassImpl.getDefaultInstance(ClassImpl.java:125)
   [testng]     at org.testng.internal.ClassImpl.getInstances(ClassImpl.java:191)
   [testng]     at org.testng.TestClass.getInstances(TestClass.java:104)
   [testng]     at org.testng.TestClass.initTestClassesAndInstances(TestClass.java:90)
   [testng]     at org.testng.TestClass.init(TestClass.java:82)
   [testng]     at org.testng.TestClass.<init>(TestClass.java:45)
   [testng]     at org.testng.TestRunner.initMethods(TestRunner.java:409)
   [testng]     at org.testng.TestRunner.init(TestRunner.java:247)
   [testng]     at org.testng.TestRunner.init(TestRunner.java:217)
   [testng]     at org.testng.TestRunner.<init>(TestRunner.java:161)
   [testng]     at org.testng.SuiteRunner$DefaultTestRunnerFactory.newTestRunner(SuiteRunner.java:555)
   [testng]     at org.testng.SuiteRunner.init(SuiteRunner.java:168)
   [testng]     at org.testng.SuiteRunner.<init>(SuiteRunner.java:117)
   [testng]     at org.testng.TestNG.createSuiteRunner(TestNG.java:1359)
   [testng]     at org.testng.TestNG.createSuiteRunners(TestNG.java:1346)
   [testng]     at org.testng.TestNG.runSuitesLocally(TestNG.java:1200)
   [testng]     at org.testng.TestNG.runSuites(TestNG.java:1124)
   [testng]     at org.testng.TestNG.run(TestNG.java:1096)
   [testng]     at org.testng.TestNG.privateMain(TestNG.java:1425)
   [testng]     at org.testng.TestNG.main(TestNG.java:1394)
   [testng] Caused by: java.lang.NoSuchMethodError: org.springframework.http.MediaType.getCharset()Ljava/nio/charset/Charset;
   [testng]     at org.springframework.web.client.RestTemplate$AcceptHeaderRequestCallback.getSupportedMediaTypes(RestTemplate.java:757)
   [testng]     at org.springframework.web.client.RestTemplate$AcceptHeaderRequestCallback.doWithRequest(RestTemplate.java:733)
   [testng]     at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:617)
   [testng]     at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:580)
   [testng]     at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:287)
   [testng]     at com.avada.rest.api.ApiTestClient.getAll(ApiTestClient.java:81)
   [testng]     at com.avada.rest.api.GroupsIntTest.<clinit>(GroupsIntTest.java:17)
   [testng]     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
   [testng]     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
   [testng]     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
   [testng]     at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
   [testng]     at org.testng.internal.ObjectFactoryImpl.newInstance(ObjectFactoryImpl.java:29)
   [testng]     at org.testng.internal.ClassHelper.createInstance1(ClassHelper.java:377)
   [testng]     ... 21 more
   [testng] The tests Failed.

解决方法

令人难以置信……再次被类加载问题挫败……一个名为activemq-minimal-5.13.3.jar的超级罐子引用了导致冲突的弹簧罐. activemq-minimal-5.13.3.jar按字母顺序排在spring之前,因此activemq jar中的类正在spring jar上加载/使用.更新了我的ant build以首先加载spring类,现在我已经完成了设置.

我发现的方法是将所有我的第三方库放在一个“测试”项目中并添加/删除罐子(有一点倾向于问题所在),直到我能够确定类加载问题的位置.