使用Rest模板时收到错误的请求

Question

尝试使用RestTemplate时，我不断收到错误的请求错误。 我已经尝试了getForObject()和exchange()方法，但都没有起作用，所以我做错了吗？

HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
headers.add("Accept", MediaType.APPLICATION_JSON.toString());

MultiValueMap<String, String> requestBody = new LinkedMultiValueMap<>();
requestBody.add("param1", "value1");
requestBody.add("param2", "true");

RestTemplate restTemplate = new RestTemplate();
return restTemplate.exchange(API_URI, HttpMethod.POST,
                    new HttpEntity<>(requestBody, headers), String.class);

堆栈跟踪：（隐藏的api名称）

2018-06-08 14:59:20错误ErrorPageFilter：176-由于异常[400 Bad Request] org.springframework.web.client.HttpClientErrorException：由于错误400，请求从请求[/ api / cal / dep]转发到错误页面在org.springframework.web.client.DefaultResponseErrorHandler.handleError（DefaultResponseErrorHandler.java:63）在org.springframework.web.client.RestTemplate.handleResponse（RestTemplate.java:700）在org.springframework.web.client.RestTemplate.doExecute （org.springframework.web.client.RestTemplate.execute（RestTemplate.java:613）（org.springframework.web.client.RestTemplate.exchange（RestTemplate.java:531）处的（RestTemplate.java:653）。 vack.service.tar.gett（tar.java:51）位于ddz.dd.vack.service.tar.calc（tar.java:57）位于sun.reflect.NativeMethodAccessorImpl.invoke0（本地方法）位于sun.reflect。 java.lang.reflect.Method.invoke（NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）位于sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43） org.org.springframework.web.method.support.InvocableHandlerMethod.doInvoke（Method.java:498）org.org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest（InvocableHandlerMethod.java:133）的Invoke（InvocableHandlerMethod.java:205） org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle（ServletInvocableHandlerMethod.java:97）位于org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod（RequestMappingHandlerAdapter.java:827） .org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal（RequestMappingHandlerAdapter.java:738）在org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle（AbstractHandlerMethodAdapter.java:85）在org.springframework org.springframework.web.serv上的.web.servlet.DispatcherServlet.doDispatch（DispatcherServlet.java:967）在org.springframework.web.servlet.DispatcherServlet.doService（DispatcherServlet.java:901）在org.springframework.web.serv org的org.springframework.web.servlet.FrameworkServlet.doPost（FrameworkServlet.java:872）处的let.FrameworkServlet.processRequest（FrameworkServlet.java:970）org处的javax.servlet.http.HttpServlet.service（HttpServlet.java:661）位于org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java）的javax.servlet.http.HttpServlet.service（HttpServlet.java:742）的.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:846） ：231），位于org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52），位于org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:52），位于org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）。 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org.springframework.web.filter.CorsFilter.doFilterInternal（CorsFilter.java:96处的.RequestCacheAwareFilter.doFilter（RequestCacheAwareFilter.java:63）在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:331）在org.springframework.web.filter.CorsFilter.doFilterInternal（CorsFilter.java:96） ）org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterCh）上的org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107） org.springframework.security.oauth2.provider.authentication.OAuth2AuthenticationProcessingFilter.doFilter（OAuth2AuthenticationProcessingFilter.java:176）上的org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:331）上的ainProxy.java:331）在org.springframework.security.web.authentication.logout.LogoutFilter.doFilter（LogoutFilter.java:116）在org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy.java:331）在org.springframework.security位于org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）的.web.header.HeaderWriterFilter.doFilterInternal（HeaderWriterFilter.java:64）位于org.springframework.security.web.FilterChainProxy $ VirtualFilterChain.doFilter（FilterChainProxy） .java：331），位于org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter（SecurityContextPersistenceFilter.java:105），位于org.springframework.security.web.FilterChainProxy $ VirtualFilterC org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal（WebAsyncManagerIntegrationFilter.java:56）的hain.doFilter（FilterChainProxy.java:331）org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter。 org.springframework.security.web.FilterChainProxy $ 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org上的org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）的ationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）org的org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal（CharacterEncodingFilter.java:197） org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）处的.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain） .java：166）org.org.springframework.boot.web.support.ErrorPageFilter.doFilter（ErrorPageFilter.java:115）org.springframework.boot.web.support.ErrorPageFilter.access $ 000（ErrorPageFilter.java:59） org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）上的.springframework.boot.web.support.ErrorPageFilter $ 1.doFilterInternal（ErrorPageFilter.java:90）在org.springframework.boot.web.support上。 ErrorPageFilter.doFilter 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Answer 1

您可以尝试删除Accept标头吗，因为它是默认json

headers.add("Accept", MediaType.APPLICATION_JSON.toString());

要么

尝试添加如下的接受标头

headers.setAccept(Collections.singletonList(MediaType.APPLICATION_JSON));

并检查您作为String.class提到的响应类型对象是什么，请交叉检查

你可以尝试如下更改

    headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
MultiValueMap<String, Object> requestBody = new LinkedMultiValueMap<>();
        requestBody.add("param1", "value1");
        requestBody.add("param2", true);Try this?