我正在使用Spring创建一个REST服务并获得一个Exception告诉我以下内容。
预期的MultipartHttpServletRequest:是一个MultipartResolver 构造
当我将method = RequestMethod.PUT更改为method = RequestMethod.POST时,它正在工作。
为什么我在PUT上获得此异常但在POST时却没有?
@Configuration
@ComponentScan("io.myservice")
@EnableAutoConfiguration
@EnableCaching
@EnableAsync(mode = ASPECTJ)
public class Application implements AsyncConfigurer {
static org.slf4j.Logger LOG = LoggerFactory.getLogger(Application.class);
public static final String MAX_FILE_SIZE = "2MB";
public static final String MAX_REQUEST_SIZE = "2MB";
public static final String FILE_SIZE_THRESHOLD = "2MB";
@Value("${app.dir.incoming}")
public String createdDir;
@Bean
public LocalValidatorFactoryBean localValidatorFactoryBean() {
return new LocalValidatorFactoryBean();
}
@Bean
MultipartConfigElement multipartConfigElement() {
String absTempPath = new File(createdDir).getAbsolutePath();
MultipartConfigFactory factory = new MultipartConfigFactory();
factory.setMaxFileSize(MAX_FILE_SIZE);
factory.setMaxRequestSize(MAX_REQUEST_SIZE);
factory.setFileSizeThreshold(FILE_SIZE_THRESHOLD);
factory.setLocation(absTempPath);
return factory.createMultipartConfig();
}
@Bean
public StandardServletMultipartResolver multipartResolver() {
return new StandardServletMultipartResolver();
}
@Override
@Bean
public ThreadPoolTaskExecutor getAsyncExecutor() {
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
executor.setCorePoolSize(2);
executor.setMaxPoolSize(2);
executor.setQueueCapacity(5);
executor.initialize();
return executor;
}
@Bean
public SimpleCacheManager cacheManager(){
SimpleCacheManager cacheManager = new SimpleCacheManager();
List<Cache> caches = new ArrayList<Cache>();
caches.add(cacheBean());
cacheManager.setCaches(caches );
return cacheManager;
}
@Bean
public Cache cacheBean(){
Cache cache = new ConcurrentMapCache("default");
return cache;
}
public static void main(String[] args) throws IOException {
SysOutOverSLF4J.sendSystemOutAndErrToSLF4J();
run(Application.class, args);
}
}
@RequestMapping(value="/converter", method=RequestMethod.PUT)
@ResponseBody
public String convert(MultipartFile file) {
LOG.info("received new file to convert")
}
Caused by: java.lang.IllegalArgumentException: Expected MultipartHttpServletRequest: is a MultipartResolver configured?
at org.springframework.util.Assert.notNull(Assert.java:112)
at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.resolveName(RequestParamMethodArgumentResolver.java:171)
at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:89)
at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:79)
at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:157)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:124)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
... 37 common frames omitted
答案 0 :(得分:13)
Spring使用的多部分支持不支持其他请求方法POST
。对于StandardServletMultipartResolver
,这在该类中是硬编码的。
对于CommonsMultipartResolver
,它在Apache Commons Fileupload项目的ServletFileUpload
实用程序类中进行了硬编码。
Form-based File Upload in HTML (RFC1867)并未真正明确这一点,但唯一提到的已使用的HTTP方法是POST。
简而言之,目前只有框架支持POST,您可以通过重新实现某些类来解决它,但是如果它有效(特别是使用默认的Servlet 3.0文件上载支持)可能取决于您的容器。 / p>
答案 1 :(得分:0)
PUT对我有用的是使用InputStream
代替MultipartFile
@RequestMapping(value="/converter", method=RequestMethod.PUT)
@ResponseBody
public String convert(InputStream file)
通过这种方式,我可以使用file body
和multipart body
上传文件内容。
答案 2 :(得分:0)
MultipartResolver不支持PUT方法。因为PUT方法不适用于带有多个参数的表单提交。
相反,我尝试将PostMapping用于相同的更新方法。因为Multipart不支持Put方法。