json异常之JsonMappingException

2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO] org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Can not deserialize instance of java.util.LinkedHashMap out of START_ARRAY token at [Source: java.io.PushbackInputStream@4a03efbe; line: 1, column: 1]; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.util.LinkedHashMap out of START_ARRAY token at [Source: java.io.PushbackInputStream@4a03efbe; line: 1, column: 1] 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:224) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:208) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:197) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:147) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:125) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:78) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:162) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:129) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:814) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:737) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:959) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:969) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:871) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:845) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:87) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:521) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1096) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:674) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at java.lang.Thread.run(Unknown Source) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO] Caused by: com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.util.LinkedHashMap out of START_ARRAY token at [Source: java.io.PushbackInputStream@4a03efbe; line: 1, column: 1] 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:148) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at com.fasterxml.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:857) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at com.fasterxml.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:853) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at com.fasterxml.jackson.databind.deser.std.StdDeserializer._deserializeFromEmpty(StdDeserializer.java:875) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:337) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at com.fasterxml.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:26) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3736) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2810) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:221) 2017-11-15 16:43:06[com.dianju.trustedSign.core.modules.models.SystemOutPrint]-[INFO]  ... 54 more

上面的错误就是json数据转换失败，转换失败的原因就是，我的当前项目就是就是使用的springboot

@SuppressWarnings({ "rawtypes"})    @UnLoginDJ    @UnOperationDJ    @RequestMapping(path = "/saveYanObjectList", method = RequestMethod.POST, consumes = "application/json")    public DJResponseEntity saveYanObjectList(@RequestBody List<Yan> lili){

上面的这个地方，使用的springMVC注解开发中，自动转换前台传入的json数据，我这个方法是把前台的转换为list集合才对，可是我写了这个错误代码

@SuppressWarnings({ "rawtypes"})    @UnLoginDJ    @UnOperationDJ    @RequestMapping(path = "/saveYanObjectList", method = RequestMethod.POST, consumes = "application/json")    public DJResponseEntity saveYanObjectList(@RequestBody Map<String,String> mm){

我的这个地方写错了，写成了上面的这个代码，结果前台json传入的list，后台无法转换成map集合，所以，才会报这个警，因为数据类型转换错误。