wicket - Wicket 1.5 中的 WebResponse.getOutputStream()？

Question

此代码在 1.4 中对我有用:

WebResponse response = (org.apache.wicket.request.http.WebResponse) getResponse();
response.setAttachmentHeader("List.xls");
response.setContentType("application/ms-excel");
OutputStream out = response.getOutputStream();
WritableWorkbook workbook = Workbook.createWorkbook(out);
.....
.....
workbook.write();
workbook.close();

我在 1.5 中看到没有 WebResponse.getOutputStream() - 但它没有被标记为已弃用？

我查看了 1.5 迁移指南，但看不到任何明显的解决方案。

谁能告诉我在 1.5 中我应该怎么做。

Answer 1

您可以将 Response 包装在 OutputStream 中:

public final class ResponseOutputStream extends OutputStream {
    private final Response response;
    private final byte[] singleByteBuffer = new byte[1];
    public ResponseOutputStream(Response response) {
        this.response = response;
    }
    @Override
    public void write(int b) throws IOException {
        singleByteBuffer[0] = (byte) b;
        write(singleByteBuffer);
    }
    @Override
    public void write(byte[] b) throws IOException {
        response.write(b);
    }
    @Override
    public void write(byte[] b, int off, int len) throws IOException {
        if (off == 0 && len == b.length) {
            this.write(b);
        } else {
            super.write(b, off, len);
        }
    }
}