Required request body is missing的问题及解决
作者:三省同学
报错
使用@RequestBody注解参数
@PostMapping("/info") InfoDTO saveInfo(@RequestBody InfoDTO InfoDTO);
请求不传任何参数时,有如下错误
Required request body is missing: xxx throws java.lang.InterruptedException
org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.readWithMessageConverters(RequestResponseBodyMethodProcessor.java:163)
org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.resolveArgument(RequestResponseBodyMethodProcessor.java:133)
org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121)
org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:179)
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:146)
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)
javax.servlet.http.HttpServlet.service(HttpServlet.java:645)
...
原因
查看源码
@Target(ElementType.PARAMETER) @Retention(RetentionPolicy.RUNTIME) @Documented public @interface RequestBody { /** * Whether body content is required. * <p>Default is {@code true}, leading to an exception thrown in case * there is no body content. Switch this to {@code false} if you prefer * {@code null} to be passed when the body content is {@code null}. * @since 3.2 */ boolean required() default true; }
源码注解的较为详细:
默认值为true,在并没有正文内容的情况下引发异常。
如果希望在正文内容为null时传递null,请将其切换为false。
源码报错位置:
RequestResponseBodyMethodProcessor
protected <T> Object readWithMessageConverters(NativeWebRequest webRequest, MethodParameter parameter, Type paramType) throws IOException, HttpMediaTypeNotSupportedException, HttpMessageNotReadableException { HttpServletRequest servletRequest = webRequest.getNativeRequest(HttpServletRequest.class); Assert.state(servletRequest != null, "No HttpServletRequest"); ServletServerHttpRequest inputMessage = new ServletServerHttpRequest(servletRequest); Object arg = readWithMessageConverters(inputMessage, parameter, paramType); if (arg == null && checkRequired(parameter)) { throw new HttpMessageNotReadableException("Required request body is missing: " + parameter.getExecutable().toGenericString(), inputMessage); } return arg; }
总结
以上为个人经验,希望能给大家一个参考,也希望大家多多支持脚本之家。