我想我可以像这样编写自己的
/errorpackage com.example.helloworldmre.controller;
import com.example.helloworldmre.data.FailureMessage;
import org.springframework.context.annotation.Primary;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpRequest;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.servlet.http.HttpServletRequest;
@RestController
@RequestMapping("/error")
@Primary
public class ErrorController {
@RequestMapping
public FailureMessage errorResponse(HttpServletRequest request) {
return new FailureMessage(HttpMethod.valueOf(request.getMethod()), request.getRequestURI()); // very basic class with an error message, I won't include it for brevity
}
}
Caused by: java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'basicErrorController' method
org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController#error(HttpServletRequest)
to { [/error]}: There is already 'errorController' bean method
com.example.helloworldmre.controller.ErrorController#errorResponse(HttpServletRequest) mapped.
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$MappingRegistry.validateMethodMapping(AbstractHandlerMethodMapping.java:669) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping$MappingRegistry.register(AbstractHandlerMethodMapping.java:635) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.registerHandlerMethod(AbstractHandlerMethodMapping.java:332) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.registerHandlerMethod(RequestMappingHandlerMapping.java:420) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.registerHandlerMethod(RequestMappingHandlerMapping.java:76) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.lambda$detectHandlerMethods$2(AbstractHandlerMethodMapping.java:299) ~[spring-webmvc-5.3.16.jar:5.3.16]
at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:721) ~[na:na]
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.detectHandlerMethods(AbstractHandlerMethodMapping.java:297) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.processCandidateBean(AbstractHandlerMethodMapping.java:266) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initHandlerMethods(AbstractHandlerMethodMapping.java:225) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.afterPropertiesSet(AbstractHandlerMethodMapping.java:213) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.afterPropertiesSet(RequestMappingHandlerMapping.java:205) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1863) ~[spring-beans-5.3.16.jar:5.3.16]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.16.jar:5.3.16]
... 50 common frames omitted
我尝试禁用该白标端点。没有帮助
server.error.whitelabel.enabled=false
我也尝试过延长
BasicErrorControllerpackage com.example.helloworldmre.controller;
import com.example.helloworldmre.data.FailureMessage;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.boot.autoconfigure.web.ErrorProperties;
import org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController;
import org.springframework.boot.web.servlet.error.ErrorAttributes;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import javax.servlet.http.HttpServletRequest;
import java.util.Map;
public class ErrorController extends BasicErrorController {
private final ObjectMapper objectMapper;
public ErrorController(ObjectMapper objectMapper, ErrorAttributes errorAttributes, ErrorProperties errorProperties) {
super(errorAttributes, errorProperties);
this.objectMapper = objectMapper;
}
@Override
public ResponseEntity<Map<String, Object>> error(HttpServletRequest request) {
FailureMessage failureMessage = new FailureMessage(HttpMethod.valueOf(request.getMethod()), request.getRequestURI());
Map<String, Object> failureMessageAsMap = objectMapper.convertValue(failureMessage, new TypeReference<>() {
});
return ResponseEntity.badRequest().body(failureMessageAsMap);
}
}
结果：
2023-12-07 14:14:27.965 ERROR 6336 --- [nio-8090-exec-2] o.a.c.c.C.[Tomcat].[localhost] : Exception Processing ErrorPage[errorCode=0, location=/error]
javax.servlet.ServletException: Circular view path [error]: would dispatch back to the current handler URL [/error] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)
at org.springframework.web.servlet.view.InternalResourceView.prepareForRendering(InternalResourceView.java:210) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:148) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:316) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1401) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1145) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1084) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.16.jar:5.3.16]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.16.jar:5.3.16]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.58.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.16.jar:5.3.16]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.58.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.16.jar:5.3.16]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.16.jar:5.3.16]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:102) ~[spring-web-5.3.16.jar:5.3.16]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:102) ~[spring-web-5.3.16.jar:5.3.16]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:711) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:461) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:385) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:313) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:403) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:249) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:344) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:359) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:889) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1735) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.58.jar:9.0.58]
at java.base/java.lang.Thread.run(Thread.java:833) ~[na:na]
只是为了确保我们在同一页面上：我想返回一个简单的 JSON，而不是完整的 HTML 视图
如何做到的？
注册您自己的
ErrorControllerBasicErrorControllerpackage com.example.helloworldmre.controller;
import com.example.helloworldmre.data.FailureMessage;
import org.springframework.boot.web.servlet.error.ErrorController;
import org.springframework.http.HttpMethod;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.servlet.http.HttpServletRequest;
@RestController
public class MyErrorController implements ErrorController {
@RequestMapping("/error")
public FailureMessage error(HttpServletRequest request) {
return new FailureMessage(HttpMethod.valueOf(request.getMethod()), request.getRequestURI());
}
}