Question

我使用的是泽西服务器，我希望端点根据参数重定向到文件下载。

我对以下功能有困难：

@GET
@Path("/get/{id}/{chunk}")
public Response getDescription(@PathParam("id") String id, @PathParam("chunk") String chunk) {
{

    StreamingOutput fileStream =  new StreamingOutput()
    {
        @Override
        public void write(java.io.OutputStream output, String id) throws IOException, WebApplicationException 
        {
            try
            {
                if (Objects.equals(chunk, new String("init"))) {
                    java.nio.file.Path path = Paths.get("src/main/uploads/example/frame_init.pdf");
                }
                else {
                    java.nio.file.Path path = Paths.get("src/main/uploads/example/"+ id +".pdf");
                }
                byte[] data = Files.readAllBytes(path);
                output.write(data);
                output.flush();
            } 
            catch (Exception e) 
            {
                throw new WebApplicationException("File Not Found !!");
            }
        }
    };
    return Response
            .ok(fileStream, MediaType.APPLICATION_OCTET_STREAM)
            .header("content-disposition","attachment; filename = myfile.pdf")
            .build();
}

将参数传递给函数write时遇到问题。我有端点的参数id和chunk，但我不能在write方法中使用它，因为它实现了StreamingOutput（）。

我该如何处理？谢谢

Answer 1

对于java，final关键字应解决您的问题。

更新代码;

@GET
@Path("/get/{id}/{chunk}")
public Response getDescription(@PathParam("id") final String id, @PathParam("chunk") final String chunk) {
{

    StreamingOutput fileStream =  new StreamingOutput()
    {
        @Override
        public void write(java.io.OutputStream output, String id2) throws IOException, WebApplicationException 
        {
            try
            {
                if (Objects.equals(chunk, new String("init"))) {
                    java.nio.file.Path path = Paths.get("src/main/uploads/example/frame_init.pdf");
                }
                else {
                    java.nio.file.Path path = Paths.get("src/main/uploads/example/"+ id2 +".pdf");
                }
                byte[] data = Files.readAllBytes(path);
                output.write(data);
                output.flush();
            } 
            catch (Exception e) 
            {
                throw new WebApplicationException("File Not Found !!");
            }
        }
    };
    return Response
            .ok(fileStream, MediaType.APPLICATION_OCTET_STREAM)
            .header("content-disposition","attachment; filename = myfile.pdf")
            .build();
}

如何为实现另一个方法的方法提供参数

1 个答案: