使用springmvc下载文件

       @RequestMapping(value ="downloadLicenseFile", method = RequestMethod.GET)

       publicResponseEntity<byte[]> downloadLicenseFile(String path) throws IOException {        

              HttpHeaders headers =newHttpHeaders(); 

           headers.setContentType(MediaType.APPLICATION_OCTET_STREAM); 

           headers.setContentDispositionFormData("attachment","license.lic"); 

          returnnewResponseEntity<byte[]>(FileUtils.readFileToByteArray(getDictionaryFile(path)), 

                                             headers, HttpStatus.CREATED); 

       }

            <beanid="stringHttpMessageConverter"

              class="org.springframework.http.converter.StringHttpMessageConverter"/>

       <beanid="jsonHttpMessageConverter"

              class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">

              <propertyname="supportedMediaTypes">

                     <list>

                           <value>text/html;charset=UTF-8</value>

                     </list>

              </property>

       </bean>

       <beanclass="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">

              <propertyname="messageConverters">

                <list>

               //下载文件处理byte数据流的转换器         

                <beanclass="org.springframework.http.converter.ByteArrayHttpMessageConverter"/>

               <refbean="stringHttpMessageConverter"/>

               <refbean="jsonHttpMessageConverter"/>

                     </list>

              </property>

       </bean>