RestTemplate请求UnknownContentTypeException:no suitable HttpMessageConverter异常
1、场景：
springboot项目， 使用 spring 自家封装的 RestTemplate 来 远程调用接口
2、报错日志：
14:59:19.720 [http-nio-8080-exec-10] ERROR c.r.f.w.e.GlobalExceptionHandler - [handleRuntimeException,69] - 请求地址'/task/jobInfo/list',发生未知异常.
org.springframework.web.client.UnknownContentTypeException: Could not extract response: no suitable HttpMessageConverter found for response type [interface java.util.List] and content type [text/html;charset=UTF-8]at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:126)at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:778)at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:711)at org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:437)at com.hidata.devops.selfops.service.impl.HiJobOperateService.getVersionRecallRemark(HiJobOperateService.java:470)at com.hidata.devops.selfops.service.impl.OpsHijobInfoServiceImpl.selectOpsHijobInfoList(OpsHijobInfoServiceImpl.java:119)at com.hidata.devops.selfops.controller.OpsHijobInfoController.list(OpsHijobInfoController.java:44)at com.hidata.devops.selfops.controller.OpsHijobInfoController$$FastClassBySpringCGLIB$$691faf83.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:779)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750)at org.springframework.security.access.intercept.aopalliance.MethodSecurityInterceptor.invoke(MethodSecurityInterceptor.java:61)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750)at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:692)at com.hidata.devops.selfops.controller.OpsHijobInfoController$$EnhancerBySpringCGLIB$$239b4905.list(<generated>)at sun.reflect.GeneratedMethodAccessor932.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197)at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141)
3、分析日志，异常原因
RestTemplate请求不支持content type [text/html;charset=UTF-8]类型
4、解决办法
Springboot注入RestTemplate类，追踪RestTemplate 实例化过程发现默认的RestTemplate 只支持application/json格式，所以需要手动补充text/html格式
查看源码，如下：
@Bean("restTemplate")@Primarypublic RestTemplate restTemplate(){RestTemplate restTemplate = new RestTemplate();return restTemplate;}public RestTemplate() {......if (jackson2Present) {this.messageConverters.add(new MappingJackson2HttpMessageConverter());}.....}public MappingJackson2HttpMessageConverter() {this(Jackson2ObjectMapperBuilder.json().build());}public MappingJackson2HttpMessageConverter(ObjectMapper objectMapper) {super(objectMapper, MediaType.APPLICATION_JSON, new MediaType("application", "*+json"));}
解决方案：
增加支持的MediaType类型：支持text/plan,text/html格式
@Bean("restTemplate")public RestTemplate restTemplate(){RestTemplate restTemplate = new RestTemplate();MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();mappingJackson2HttpMessageConverter.setSupportedMediaTypes(Arrays.asList(MediaType.TEXT_HTML,MediaType.TEXT_PLAIN));restTemplate.getMessageConverters().add(mappingJackson2HttpMessageConverter);return restTemplate;}
RestTemplate请求UnknownContentTypeException:no suitable HttpMessageConverter异常
1、场景：
springboot项目， 使用 spring 自家封装的 RestTemplate 来 远程调用接口
2、报错日志：
14:59:19.720 [http-nio-8080-exec-10] ERROR c.r.f.w.e.GlobalExceptionHandler - [handleRuntimeException,69] - 请求地址'/task/jobInfo/list',发生未知异常.
org.springframework.web.client.UnknownContentTypeException: Could not extract response: no suitable HttpMessageConverter found for response type [interface java.util.List] and content type [text/html;charset=UTF-8]at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:126)at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:778)at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:711)at org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:437)at com.hidata.devops.selfops.service.impl.HiJobOperateService.getVersionRecallRemark(HiJobOperateService.java:470)at com.hidata.devops.selfops.service.impl.OpsHijobInfoServiceImpl.selectOpsHijobInfoList(OpsHijobInfoServiceImpl.java:119)at com.hidata.devops.selfops.controller.OpsHijobInfoController.list(OpsHijobInfoController.java:44)at com.hidata.devops.selfops.controller.OpsHijobInfoController$$FastClassBySpringCGLIB$$691faf83.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:779)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750)at org.springframework.security.access.intercept.aopalliance.MethodSecurityInterceptor.invoke(MethodSecurityInterceptor.java:61)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750)at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:750)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:692)at com.hidata.devops.selfops.controller.OpsHijobInfoController$$EnhancerBySpringCGLIB$$239b4905.list(<generated>)at sun.reflect.GeneratedMethodAccessor932.invoke(Unknown Source)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:197)at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:141)
3、分析日志，异常原因
RestTemplate请求不支持content type [text/html;charset=UTF-8]类型
4、解决办法
Springboot注入RestTemplate类，追踪RestTemplate 实例化过程发现默认的RestTemplate 只支持application/json格式，所以需要手动补充text/html格式
查看源码，如下：
@Bean("restTemplate")@Primarypublic RestTemplate restTemplate(){RestTemplate restTemplate = new RestTemplate();return restTemplate;}public RestTemplate() {......if (jackson2Present) {this.messageConverters.add(new MappingJackson2HttpMessageConverter());}.....}public MappingJackson2HttpMessageConverter() {this(Jackson2ObjectMapperBuilder.json().build());}public MappingJackson2HttpMessageConverter(ObjectMapper objectMapper) {super(objectMapper, MediaType.APPLICATION_JSON, new MediaType("application", "*+json"));}
解决方案：
增加支持的MediaType类型：支持text/plan,text/html格式
@Bean("restTemplate")public RestTemplate restTemplate(){RestTemplate restTemplate = new RestTemplate();MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();mappingJackson2HttpMessageConverter.setSupportedMediaTypes(Arrays.asList(MediaType.TEXT_HTML,MediaType.TEXT_PLAIN));restTemplate.getMessageConverters().add(mappingJackson2HttpMessageConverter);return restTemplate;}