在项目中需要对外提供Rest风格的API实现文件的下载。现把实现的代码贴出来。关键的是要把
produces = MediaType.MULTIPART_FORM_DATA_VALUE才能实现下载。
import java.util.List;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import com.base.utils.FdfsUtils;
import com.business.model.FileInfo;
@RestController
@RequestMapping("/rest")
public class DownloadRestController {
/**
* 下载
*
* @param systemInfo
* @param ucBuilder
* @return
*/
@RequestMapping(value = "/download/", method = RequestMethod.POST, produces = MediaType.MULTIPART_FORM_DATA_VALUE)
@Transactional
public ResponseEntity<byte[]> downloadFile(@RequestBody FileInfo entity) {
if (entity == null) {
return new ResponseEntity<byte[]>(HttpStatus.BAD_REQUEST);
} else {
byte[] fileArray = FdfsUtils.downloadFromFdfs(entity.getFilePath());
return new ResponseEntity<byte[]>(fileArray, HttpStatus.OK);
}
}
}