java – 无法构建MockMvc(已经存在类型为X的处理程序)
作者：互联网
我有简单的Controller类：
@Controller
public class UserController {
@RequestMapping("/user")
@ResponseBody
@PostAuthorize("hasPermission(returnObject, 'VIEW')")
public User getUser(Long id) {
// fetch user from DB
}
}
我想用Spring Security集成测试我的控制器.基于this article我创建了以下测试：
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(loader = AnnotationConfigWebContextLoader.class, classes = WebappConfig.class)
@WebAppConfiguration
public class UserControllerTest {
@Autowired
private WebApplicationContext context;
@Autowired
private Filter springSecurityFilterChain;
protected MockMvc mvc;
@Before
public void initializeMvc() {
mvc = MockMvcBuilders
.webAppContextSetup(context)
.addFilters(springSecurityFilterChain)
.build();
}
// tests
}
但是,在@Before方法中,当调用build()时,抛出以下异常：
java.lang.IllegalStateException:
Cannot map handler 'userController' to URL path [/user]:
There is already handler of type
[class com.example.UserController$$EnhancerBySpringCGLIB$$adfe5ea8] mapped.
好像Spring试图将控制器实例化两次.为什么？
Webapp配置：
@Configuration
@EnableWebMvc
@ComponentScan("com.example")
@EnableGlobalMethodSecurity(prePostEnabled = true)
@EnableSpringDataWebSupport
public class WebappConfig extends WebMvcConfigurerAdapter { }
完整堆栈跟踪：
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping': Initialization of bean failed; nested exception is java.lang.IllegalStateException: Cannot map handler 'userController' to URL path [/user]: There is already handler of type [class com.example.rest.controller.UserController$$EnhancerBySpringCGLIB$$adfe5ea8] mapped.
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:547) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:291) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.createDefaultStrategy(DispatcherServlet.java:849) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.getDefaultStrategies(DispatcherServlet.java:818) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.initHandlerMappings(DispatcherServlet.java:588) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.initStrategies(DispatcherServlet.java:482) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.onRefresh(DispatcherServlet.java:471) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:555) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:489) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) [spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at javax.servlet.GenericServlet.init(GenericServlet.java:244) [javax.servlet-api-3.1.0.jar:3.1.0]
at org.springframework.test.web.servlet.MockMvcBuilderSupport.createMockMvc(MockMvcBuilderSupport.java:52) [spring-test-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.test.web.servlet.setup.AbstractMockMvcBuilder.build(AbstractMockMvcBuilder.java:146) [spring-test-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at com.example.UserControllerTest.initializeMvc(UserControllerTest .java:40) [test/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_45]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_45]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_45]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_45]
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) [junit-4.12.jar:4.12]
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.12.jar:4.12]
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) [junit-4.12.jar:4.12]
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) [junit-4.12.jar:4.12]
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26) [junit-4.12.jar:4.12]
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:73) [spring-test-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82) [spring-test-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55) [junit-4.12.jar:4.12]
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55) [junit-4.12.jar:4.12]
at org.junit.rules.RunRules.evaluate(RunRules.java:20) [junit-4.12.jar:4.12]
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:73) [spring-test-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) [junit-4.12.jar:4.12]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:224) [spring-test-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:83) [spring-test-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) [junit-4.12.jar:4.12]
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) [junit-4.12.jar:4.12]
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:68) [spring-test-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.junit.runners.ParentRunner.run(ParentRunner.java:363) [junit-4.12.jar:4.12]
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:163) [spring-test-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.junit.runner.JUnitCore.run(JUnitCore.java:137) [junit-4.12.jar:4.12]
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:78) [junit-rt.jar:na]
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:212) [junit-rt.jar:na]
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:68) [junit-rt.jar:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_45]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_45]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_45]
at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_45]
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140) [idea_rt.jar:na]
Caused by: java.lang.IllegalStateException: Cannot map handler 'userController' to URL path [/user]: There is already handler of type [class com.example.rest.controller.UserController$$EnhancerBySpringCGLIB$$adfe5ea8] mapped.
at org.springframework.web.servlet.handler.AbstractUrlHandlerMapping.registerHandler(AbstractUrlHandlerMapping.java:295) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.web.servlet.handler.AbstractUrlHandlerMapping.registerHandler(AbstractUrlHandlerMapping.java:265) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.web.servlet.handler.AbstractDetectingUrlHandlerMapping.detectHandlers(AbstractDetectingUrlHandlerMapping.java:82) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.web.servlet.handler.AbstractDetectingUrlHandlerMapping.initApplicationContext(AbstractDetectingUrlHandlerMapping.java:58) ~[spring-webmvc-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.context.support.ApplicationObjectSupport.initApplicationContext(ApplicationObjectSupport.java:120) ~[spring-context-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.web.context.support.WebApplicationObjectSupport.initApplicationContext(WebApplicationObjectSupport.java:76) ~[spring-web-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.context.support.ApplicationObjectSupport.setApplicationContext(ApplicationObjectSupport.java:74) ~[spring-context-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.context.support.ApplicationContextAwareProcessor.invokeAwareInterfaces(ApplicationContextAwareProcessor.java:119) ~[spring-context-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.context.support.ApplicationContextAwareProcessor.postProcessBeforeInitialization(ApplicationContextAwareProcessor.java:94) ~[spring-context-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:408) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1566) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539) ~[spring-beans-4.1.6.RELEASE.jar:4.1.6.RELEASE]
... 51 common frames omitted
我能够在MockMvc独立设置中运行此测试,但似乎是I can’t use spring data web integration then,这同样令人讨厌.
解决方法:
这是一个假设,因为您没有提供可能看起来不相关的系统的其他部分,但实际上它们可能是因为WebappConfig类上的@ComponentScan(“com.example”)注释.这通常是我经历中最常见的原因.
如果在“com.example”包或其任何子包中确实有其他@Configuration类,那么它们将在Context中加载.
现在,如果其他@Configuration类也有@ComponentScan,注释,那可能是组件被扫描两次的问题.
因此,如果是这种情况,避免这种情况的解决方案是以这样的方式组织包,即使用@ComponentScan注释的类永远不会扫描也使用@ComponentScan的其他类.
标签：java,spring-mvc,spring,spring-test,spring-aspects 来源： https://codeday.me/bug/20190708/1403014.html