SpringMVC引用json时出现报错
javax.servlet.ServletException: Servlet.init() for servlet [DispatcherServlet] threw exceptionorg.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1468)org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)java.base/java.lang.Thread.run(Thread.java:834)
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#0' defined in class path resource [spring-mvc.xml]: Cannot create inner bean 'org.springframework.http.converter.json.MappingJackson2HttpMessageConverter#1e0aca79' of type [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter] while setting bean property 'messageConverters' with key [0]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.http.converter.json.MappingJackson2HttpMessageConverter#1e0aca79': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.http.converter.json.MappingJackson2HttpMessageConverter] from ClassLoader [ParallelWebappClassLoadercontext: wbslz_spring_mvcdelegate: false
----------> Parent Classloader:
java.net.URLClassLoader@1623b78d
]org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:327)
- 原因是jar包没有真正导入到项目,没有把对应的jar放到WEB-INF下的lib目录
- 解决办法:把对应的jar放到WEB-INF下的lib目录
- File --> Project Structure
2.
- 1.选中Artifacts
- 2.选中
<output root>
- 3.选中对应·模块
- 4.选中jar包
- 5.点击Put into/WEB-INF/lib
- 完成。重新运行项目即可