视觉智能平台复制的官网示例代码，报错显示在这一行是什么原因呀？
视觉智能平台复制的官网示例代码，报错显示在这一行是什么原因呀？
这个是报错信息:
com.google.gson.JsonIOException: Failed making field 'java.lang.Throwable#detailMessage' accessible; either increase its visibility or write a custom TypeAdapter for its declaring type.
at com.google.gson.internal.reflect.ReflectionHelper.makeAccessible(ReflectionHelper.java:38)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:286)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:130)
at com.google.gson.Gson.getAdapter(Gson.java:556)
at com.google.gson.Gson.toJson(Gson.java:834)
at com.google.gson.Gson.toJson(Gson.java:812)
at com.google.gson.Gson.toJson(Gson.java:759)
at com.google.gson.Gson.toJson(Gson.java:736)
at com.aliyun.teautil.Common.toJSONString(Common.java:353)
at com.upc.edu.college_oriented_system1_171.util.ALiFaceBodyUtil.faceCompare(ALiFaceBodyUtil.java:91)
at com.upc.edu.college_oriented_system1_171.controller.FaceCompareController.faceCompare(FaceCompareController.java:23)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:118)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:884)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1081)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:974)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:914)
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:590)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885)
at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:658)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:205)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:116)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:174)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:149)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:167)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:482)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:340)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:391)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:896)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1744)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:842)
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private java.lang.String java.lang.Throwable.detailMessage accessible: module java.base does not "opens java.lang" to unnamed module @61322f9d
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:354)
at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)
at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:178)
at java.base/java.lang.reflect.Field.setAccessible(Field.java:172)
at com.google.gson.internal.reflect.ReflectionHelper.makeAccessible(ReflectionHelper.java:35)
写回答
-
这个错误是Google Gson库在尝试反序列化JSON字符串到Java对象时抛出的。具体来说，Gson试图访问Throwable#detailMessage字段，但是由于该字段的访问权限不足（可能是私有(private)或受保护(protected)），导致无法直接访问并赋值。
解决这个问题的方法有两种：
编写自定义TypeAdapter： 创建一个针对Throwable或特定子类的自定义TypeAdapter，并在其中处理detailMessage字段的读写逻辑。这种方式允许你控制字段的反序列化行为，即便它们是私有的。
Java
public class ThrowableTypeAdapter extends TypeAdapter {
@Override
public void write(JsonWriter out, Throwable value) throws IOException {
// 实现写入逻辑
}@Override public Throwable read(JsonReader in) throws IOException { // 实现读取逻辑，包括对detailMessage字段的处理 }}
// 注册自定义TypeAdapter
Gson gson = new GsonBuilder()
.registerTypeAdapter(Throwable.class, new ThrowableTypeAdapter())
.create();
提升字段可见性： 如果你对Throwable类有控制权（例如，是你自己编写的类），可以考虑将detailMessage字段的访问权限改为公开(public)，但这不是一个理想的解决方案，因为它违背了封装原则，而且在大多数情况下我们并没有对Throwable类的控制权。Java
// 不推荐的做法示例，仅作说明
public class MyException extends Throwable {
public String detailMessage; // 将访问权限提升为public
}
考虑到Throwable类是Java的标准类，我们通常不建议修改其结构。因此，在这种情况下，推荐采用第一种方案，即编写自定义的TypeAdapter来适配Throwable类的反序列化。当然，如果不是必须反序列化Throwable对象，也可能需要重新审视你的设计，看看是否有必要将异常对象序列化为JSON。2024-03-13 13:59:25赞同 展开评论 打赏
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