com.alibaba.fastjson.JSONException: toJSON error异常，可能导致这个异常的原因。

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我是靠谱客的博主平常棒球，这篇文章主要介绍com.alibaba.fastjson.JSONException: toJSON error异常，可能导致这个异常的原因。，现在分享给大家，希望可以做个参考。

前言

这个异常明显是对象转json失败了，同一个接口，代码执行到最后返回数据给前端时，有时候会出现会异常，有时候又是正常的，时好时坏。这种问题是最难找的，通常代码基本没什么问题，这种大多出现在数据体上。
我也遇上了这个问题，通过一番寻找后解决了，分享出来给遇到相同问题的朋友参考下。
下面来看我的异常：

复制代码

com.alibaba.fastjson.JSONException: toJSON error
at com.alibaba.fastjson.JSON.toJSON(JSON.java:987) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:888) ~[fastjson-1.2.47.jar!/:na]
at com.partjob.controller.ShareholderController.getListShareholder(ShareholderController.java:53) ~[classes!/:0.0.1]
at com.partjob.controller.ShareholderController$$FastClassBySpringCGLIB$$f4d413a6.invoke(<generated>) ~[classes!/:0.0.1]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749) ~[spring-aop-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at com.alibaba.druid.support.spring.stat.DruidStatInterceptor.invoke(DruidStatInterceptor.java:72) ~[druid-1.1.9.jar!/:1.1.9]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) ~[spring-aop-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at com.partjob.controller.ShareholderController$$EnhancerBySpringCGLIB$$d09b7392.getListShareholder(<generated>) ~[classes!/:0.0.1]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_242]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_242]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_242]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_242]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) ~[spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800) ~[spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) [spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) [spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) [spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) [spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) [spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-embed-websocket-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) [shiro-core-1.3.1.jar!/:1.3.1]
at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) [shiro-core-1.3.1.jar!/:1.3.1]
at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383) [shiro-core-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:96) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123) [druid-1.1.9.jar!/:1.1.9]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:791) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_242]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_242]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_242]
Caused by: com.alibaba.fastjson.JSONException: toJSON error
at com.alibaba.fastjson.JSON.toJSON(JSON.java:987) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:888) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:940) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:888) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:984) ~[fastjson-1.2.47.jar!/:na]
... 89 common frames omitted
Caused by: com.alibaba.fastjson.JSONException: toJSON error
at com.alibaba.fastjson.JSON.toJSON(JSON.java:987) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:888) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:940) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:888) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:984) ~[fastjson-1.2.47.jar!/:na]
... 93 common frames omitted
Caused by: java.lang.reflect.InvocationTargetException: null
at sun.reflect.GeneratedMethodAccessor375.invoke(Unknown Source) ~[na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_242]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_242]
at com.alibaba.fastjson.util.FieldInfo.get(FieldInfo.java:484) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.serializer.FieldSerializer.getPropertyValue(FieldSerializer.java:148) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.serializer.JavaBeanSerializer.getFieldValuesMap(JavaBeanSerializer.java:686) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:982) ~[fastjson-1.2.47.jar!/:na]
... 97 common frames omitted
Caused by: java.lang.NullPointerException: null
at com.common.model.po.AgentRateConf.getCode(AgentRateConf.java:47) ~[classes!/:0.0.1]
... 104 common frames omitted

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com.alibaba.fastjson.JSONException: toJSON error
at com.alibaba.fastjson.JSON.toJSON(JSON.java:987) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:888) ~[fastjson-1.2.47.jar!/:na]
at com.partjob.controller.ShareholderController.getListShareholder(ShareholderController.java:53) ~[classes!/:0.0.1]
at com.partjob.controller.ShareholderController$$FastClassBySpringCGLIB$$f4d413a6.invoke(<generated>) ~[classes!/:0.0.1]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:749) ~[spring-aop-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at com.alibaba.druid.support.spring.stat.DruidStatInterceptor.invoke(DruidStatInterceptor.java:72) ~[druid-1.1.9.jar!/:1.1.9]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) ~[spring-aop-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at com.partjob.controller.ShareholderController$$EnhancerBySpringCGLIB$$d09b7392.getListShareholder(<generated>) ~[classes!/:0.0.1]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_242]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_242]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_242]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_242]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) ~[spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800) ~[spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) [spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) [spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) [spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908) [spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) [spring-webmvc-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) [tomcat-embed-websocket-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:61) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AdviceFilter.executeChain(AdviceFilter.java:108) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal(AdviceFilter.java:137) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter(ProxiedFilterChain.java:66) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) [shiro-core-1.3.1.jar!/:1.3.1]
at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) [shiro-core-1.3.1.jar!/:1.3.1]
at org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383) [shiro-core-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) [shiro-web-1.3.1.jar!/:1.3.1]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:96) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123) [druid-1.1.9.jar!/:1.1.9]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-5.1.3.RELEASE.jar!/:5.1.3.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:791) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1417) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_242]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_242]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.13.jar!/:9.0.13]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_242]
Caused by: com.alibaba.fastjson.JSONException: toJSON error
at com.alibaba.fastjson.JSON.toJSON(JSON.java:987) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:888) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:940) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:888) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:984) ~[fastjson-1.2.47.jar!/:na]
... 89 common frames omitted
Caused by: com.alibaba.fastjson.JSONException: toJSON error
at com.alibaba.fastjson.JSON.toJSON(JSON.java:987) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:888) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:940) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:888) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:984) ~[fastjson-1.2.47.jar!/:na]
... 93 common frames omitted
Caused by: java.lang.reflect.InvocationTargetException: null
at sun.reflect.GeneratedMethodAccessor375.invoke(Unknown Source) ~[na:na]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_242]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_242]
at com.alibaba.fastjson.util.FieldInfo.get(FieldInfo.java:484) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.serializer.FieldSerializer.getPropertyValue(FieldSerializer.java:148) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.serializer.JavaBeanSerializer.getFieldValuesMap(JavaBeanSerializer.java:686) ~[fastjson-1.2.47.jar!/:na]
at com.alibaba.fastjson.JSON.toJSON(JSON.java:982) ~[fastjson-1.2.47.jar!/:na]
... 97 common frames omitted
Caused by: java.lang.NullPointerException: null
at com.common.model.po.AgentRateConf.getCode(AgentRateConf.java:47) ~[classes!/:0.0.1]
... 104 common frames omitted

错误分析

第一次看到这个异常时，我就把接口拿过来运行测试，发现代码没有问题，代码一直执行到最后一行也没有报错，错误时在返回数据时爆出来的。我注意到错误的最底下的代码：

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Caused by: java.lang.NullPointerException: null
at com.common.model.po.AgentRateConf.getCode(AgentRateConf.java:47) ~[classes!/:0.0.1]
... 104 common frames omitted

1.AgentRateConf这是唯一一个错误里由程序员编写的类，找到这个类发现它仅仅是个实体类而已。
2.找到getCode后发现操作的是一个枚举类。再看他的set方法：

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this.type = RateType.valueOfCode(code);

以及这行代码的valueOfCode(code)方法：

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 public static RateType valueOfCode(int code) {
for (RateType type : values()) {
if (code == type.getCode()) {
return type;
}
}
return null;
}

问题浮出水面。这里传入枚举类里没有的数值时会返回null，
3.这个枚举被指影射到了mybaits里。在mybatis-config.xml里发现这个配置

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<typeHandler handler="com.mla.partjob.enums.CodeEnumTypeHandler" javaType="com.mla.partjob.enums.RateType"/>

4.结合接口时好时坏我跑去查询发现数据库对应的这个字段type出现了null或者不在枚举类里的值。
5.问题已经很明显，数据库对应这个字段的数据与枚举类出现了差异。由于影射的关系，这里必须得保持数据库枚举数据值。

解决

根据上面得问题追踪和分析，在枚举类添加相应的枚举值，问题解决。

最后

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本文分类：异常
浏览次数：133 次浏览
发布日期：2023-10-21 23:21:01
本文链接：https://www.kaopuke.com/article/k-p-k_13_u_23_o_22_fx_12__7__2_4.html

com.alibaba.fastjson.JSONException: toJSON error异常，可能导致这个异常的原因。

前言

错误分析

解决

最后

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com.alibaba.fastjson.JSONException: toJSON error异常，可能导致这个异常的原因。

前言

错误分析

解决

最后

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