“JSON parse error: Unexpected character (‘\“‘ (code 34)): was expecting comma to separate Object ent 2022-03-09 10:12:40

JsonEOFException

json报错一般都是格式问题，首先检查参数格式

报错"JSON parse error: Unexpected character ('\"' (code 34)): was expecting comma to separate Object entries; nested exception is com.fasterxml.jackson.core.JsonParseExc

只需要看这个'\"'，代表换行符报错，缺少换行分隔符的含义

JSON parse error: Unexpected end-of-input: expected close marker for Object (start marker at [Source: (PushbackInputStream);

JSON parse error: Unexpected character ('}' (code 125)): was expecting double-quote to start field name; nested exception is com.fasterxml.jackson.core.JsonParseException: Unexpected character ('}' (code 125)): was expecting double-quote to start field name

缺少集合，就是缺少{}

JSON parse error: Unexpected character (’”’ (code 34))

最后看到下面这一堆报错不要慌，只需要看第一行('\"' (code 34)这个报错就可以，分析具体是什么问题导致

{"code":"1","msg":"JSON parse error: Unexpected character ('\"' (code 34)): was expecting comma to separate Object entries; nested exception is com.fasterxml.jackson.core.JsonParseException: Unexpected character ('\"' (code 34)): was expecting comma to separate Object entries\n at [Source: (PushbackInputStream); line: 5, column: 3]","data":"org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Unexpected character ('\"' (code 34)): was expecting comma to separate Object entries; nested exception is com.fasterxml.jackson.core.JsonParseException: Unexpected character ('\"' (code 34)): was expecting comma to separate Object entries\n at [Source: (PushbackInputStream); line: 5, column: 3]\n\tat org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:285)\n\tat org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:243)\n\tat org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodArgumentResolver.readWithMessageConverters(AbstractMessageConverterMethodArgumentResolver.java:205)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:158)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:131)\n\tat org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121)\n\tat org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:167)\n\tat org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134)\n\tat org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792)\n\tat org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)\n\tat org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:665)\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:750)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat com.hairoutech.iwms.common.filter.IdempotentParamFilter.doFilter(IdempotentParamFilter.java:73)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat com.hairoutech.iwms.common.filter.PageFilter.doFilter(PageFilter.java:45)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)\n\tat org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)\n\tat org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)\n\tat org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)\n\tat org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590)\n\tat org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)\n\tat java.lang.Thread.run(Thread.java:748)\nCaused by: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('\"' (code 34)): was expecting comma to separate Object entries\n at [Source: (PushbackInputStream); line: 5, column: 3]\n\tat com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1851)\n\tat com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:707)\n\tat com.fasterxml.jackson.core.base.ParserMinimalBase._reportUnexpectedChar(ParserMinimalBase.java:632)\n\tat com.fasterxml.jackson.core.json.UTF8StreamJsonParser.nextFieldName(UTF8StreamJsonParser.java:1019)\n\tat com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:378)\n\tat com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:164)\n\tat com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4526)\n\tat com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3521)\n\tat org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:274)\n\t... 57 more\n","errorMsg":""}

在java后端的开发中，我们会经常遇到一个错误就是： Json Parse Exception: Unexpected character (’?’ ( code 255)): was expect ing comma to separate OBJECT ent ries， 当我们遇到这错误后别担心，去看看请求参数格式和符号是否正确，一般这个错误是由于请求参数的 json 格式错误引起的。比如一个英文",“写成... 一文详解 Unexpected character ('"' ( code 34 )): was expect ing comma to separate Object ent ries的问题 1 复现过程 POST + @RequestBody + json 格式的数据，不指定数据格式 Mapp ing Jackson2HttpMessageConverter 读取 application/x-www-form-urlen code d;charset=UTF-8 就会报异常： JSON parse error : Unexpected character ('%' ( code 37)): expect ed a valid value (number, Str ing , array, object , 'tr.. 2021-07-30 14:54:14.423 ERROR 2 34 8 --- [nio-9002-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request process ing failed; nested exception is org.spr 1.测试数据 ，postman 里面message出现这样的报错 JSON parse error : Unexpected character (’}’ ( code 125)): was expect ing double-quote to start field name; nested exception is com.fasterxml.jackson.core. Json Parse Except... " code ": 400, "msg": " JSON parse error : Unexpected character ('\"' ( code 34 )): was expect ing comma to separate Object ent ries; nested exception is com.fasterxml.jackson.core. Json Parse Exception: Unexpected character const parse Json = require ( ' parse - json ' ) ; const json = '{\n\t"foo": true,\n}' ; JSON . parse ( json ) ; undefined:3 Syntax Error : Unexpected token } parse Json ( json ) ; JSON Error : Unexpected token } in JSON at position 16 while pars ing near '{ "foo": true,}' 1 | { 2 | "foo": true, > 3 | } parse Json ( json 在本篇博客中，我们讨论了在Spr ing 框架应用程序中解析 JSON 时出现的异常，并分析了异常信息及其原因。为了解决这个问题，我们提供了相应的解决方案，并介绍了如何避免类似问题的措施。同时，我们强烈建议升级至IDEA 2023或更新版本，以确保应用程序能够正确处理 JSON 数据，并避免类似的解析异常。通过遵循良好的 JSON 数据生成和验证实践，以及使用可靠的 JSON 库，您可以提升开发效率和代码质量，避免潜在的编码问题。另外，使用Postman的美化功能也可以帮助您在调试和测试阶段更轻松地处理 JSON 数据。