以前写的一个rest提供的是浏览器下载zip包的功能，前端界面调用rest可以正常地下载。
今天使用Swagger来调试下载功能时，发现下载的zip包打不开，而且大小也比直接在浏览器中输入rest地址下载的zip包要大。
浏览器中输入rest地址下载的zip包是好的，大小也是对的。
rest的@ApiOperation注解的produces属性需要配置为"application/octet-stream"
@ApiOperation(value = "下载zip", produces = "application/octet-stream")
response设置如下：
response.setContentType("application/zip");
response.setHeader("Content-Disposition", "attachment;filename=test.zip");
Content-Disposition参数：attachment --- 作为附件下载 inline --- 在线打开
application/octet-stream是MIME类型，指的是二进制类型。 不清楚具体的类型时，可以指定为二进制类型
'doc' => 'application/msword',
'bin' => 'application/octet-stream',
'exe' => 'application/octet-stream',
'so' => 'application/octet-stream',
'dll' => 'application/octet-stream',
'pdf' => 'application/pdf',
'ai' => 'application/postscript',
'xls' => 'application/vnd.ms-excel',
'ppt' => 'application/vnd.ms-powerpoint',
'dir' => 'application/x-director',
'js' => 'application/x-javascript',
'swf' => 'application/x-shockwave-flash',
'xhtml' => 'application/xhtml+xml',
'xht' => 'application/xhtml+xml',
'zip' => 'application/zip',
'mid' => 'audio/midi',
'midi' => 'audio/midi',
'mp3' => 'audio/mpeg',
'rm' => 'audio/x-pn-realaudio',
'rpm' => 'audio/x-pn-realaudio-plugin',
'wav' => 'audio/x-wav',
'bmp' => 'image/bmp',
'gif' => 'image/gif',
'jpeg' => 'image/jpeg',
'jpg' => 'image/jpeg',
'png' => 'image/png',
'css' => 'text/css',
'html' => 'text/html',
'htm' => 'text/html',
'txt' => 'text/plain',
'xsl' => 'text/xml',
'xml' => 'text/xml',
'mpeg' => 'video/mpeg',
'mpg' => 'video/mpeg',
'avi' => 'video/x-msvideo',
'movie' => 'video/x-sgi-movie'