如何使用rest服务的AndroidAnnotation下载mp4文件

Question

我的问题是，我不确定如何使用androidannotation rest api来下载文件，以下是我的示例代码。

我已经创建了一个restful服务，如下所示：

@Controller
@RequestMapping("/")
public class BaseController {
   private String filePath = "web-inf/scheduler/downloadList.properties";
private static final int BUFFER_SIZE = 4096;

@RequestMapping(value = "/files", method = RequestMethod.GET)
public void  getLogFile(HttpServletRequest request, HttpServletResponse response) throws Exception{
    // get absolute path of the application

    ServletContext context = request.getSession().getServletContext();
    String appPath = context.getRealPath("");
    System.out.println("appPath = " + appPath);

    // construct the complete absolute path of the file
    String fullPath = appPath + filePath;
    File downloadFile = new File(fullPath);
    FileInputStream inputStream = new FileInputStream(downloadFile);

    // get MIME type of the file
    String mimeType = context.getMimeType(fullPath);
    if (mimeType == null) {
        // set to binary type if MIME mapping not found
        mimeType = "application/octet-stream";
    }
    System.out.println("MIME type: " + mimeType);

    // set content attributes for the response
    response.setContentType(mimeType);
    response.setContentLength((int) downloadFile.length());

    // set headers for the response
    String headerKey = "Content-Disposition";
    String headerValue = String.format("attachment; filename=\"%s\"",
            downloadFile.getName());
    response.setHeader(headerKey, headerValue);

    // get output stream of the response
    OutputStream outStream = response.getOutputStream();

    byte[] buffer = new byte[BUFFER_SIZE];
    int bytesRead = -1;

    // write bytes read from the input stream into the output stream
    while ((bytesRead = inputStream.read(buffer)) != -1) {
        outStream.write(buffer, 0, bytesRead);
    }

    inputStream.close();
    outStream.close();

}

}

如果我使用谷歌浏览器浏览网址"http://[hostname]:8080/mnc-sms-endpoint/files“，那么它就能够下载文件。

现在，我想创建一个android应用程序来从这个restful服务中获取文件。

下面是我的android代码:但它总是给我显示错误，实际上我对androidannotation和spring-android还是个新手。

@Rest(converters = { ByteArrayHttpMessageConverter.class })
public interface MainRestClient extends RestClientHeaders {
    // url variables are mapped to method parameter names.
    @Get("http://192.168.1.37:8080/mnc-sms-endpoint/files")
    @Accept(MediaType.APPLICATION_OCTET_STREAM)
    byte[] getEvents();
}

下面是我的android活动：

@EActivity(R.layout.activity_main)
public class MainActivity extends Activity {
       @RestService
       MainRestClient mainRestClient;

 @AfterViews
    protected void init() {
       mainRestClient.getEvents();

}

}

Answer 1

当您的应用程序调用WS时会出现什么错误？

此外，您还应该删除@Accept(...)注释，因为WS可能会返回与application/octet-stream不同的内容类型(因为String mimeType = context.getMimeType(fullPath);这一行)