因为原来的代码是不可用了。如果有人来这里需要它。我用“内容编码：gzip”来标识是否需要解压缩的过滤器。
这是密码。

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
{
    HttpServletRequest httpServletRequest = (HttpServletRequest) request;

    String contentEncoding = httpServletRequest.getHeader("Content-Encoding");
    if (contentEncoding != null && contentEncoding.indexOf("gzip") > -1)
    {
        try
        {
            final InputStream decompressStream = StreamHelper.decompressStream(httpServletRequest.getInputStream());

            httpServletRequest = new HttpServletRequestWrapper(httpServletRequest)
            {

                @Override
                public ServletInputStream getInputStream() throws IOException
                {
                    return new DecompressServletInputStream(decompressStream);
                }

                @Override
                public BufferedReader getReader() throws IOException
                {
                    return new BufferedReader(new InputStreamReader(decompressStream));
                }
            };
        }
        catch (IOException e)
        {
            mLogger.error("error while handling the request", e);
        }
    }

    chain.doFilter(httpServletRequest, response);
}

简单ServletInputStream Package 类

public static class DecompressServletInputStream extends ServletInputStream
{
    private InputStream inputStream;

    public DecompressServletInputStream(InputStream input)
    {
        inputStream = input;

    }

    @Override
    public int read() throws IOException
    {
        return inputStream.read();
    }

}

解压缩码流

public class StreamHelper
{

    /**
     * Gzip magic number, fixed values in the beginning to identify the gzip
     * format <br>
     * http://www.gzip.org/zlib/rfc-gzip.html#file-format
     */
    private static final byte GZIP_ID1 = 0x1f;
    /**
     * Gzip magic number, fixed values in the beginning to identify the gzip
     * format <br>
     * http://www.gzip.org/zlib/rfc-gzip.html#file-format
     */
    private static final byte GZIP_ID2 = (byte) 0x8b;

    /**
     * Return decompression input stream if needed.
     * 
     * @param input
     *            original stream
     * @return decompression stream
     * @throws IOException
     *             exception while reading the input
     */
    public static InputStream decompressStream(InputStream input) throws IOException
    {
        PushbackInputStream pushbackInput = new PushbackInputStream(input, 2);

        byte[] signature = new byte[2];
        pushbackInput.read(signature);
        pushbackInput.unread(signature);

        if (signature[0] == GZIP_ID1 && signature[1] == GZIP_ID2)
        {
            return new GZIPInputStream(pushbackInput);
        }
        return pushbackInput;
    }
}

[Content-Encoding]似乎不是有效的请求标头。
事实并非如此。根据RFC 2616第14.11节，Content-Encoding是一个 * 实体 * 报头，这意味着它可以应用于http响应和请求的实体。通过多部分MIME消息的强大功能，甚至可以压缩请求（或响应）的选定 * 部分 *。
然而，Web服务器对压缩请求主体的支持相当少，Apache通过mod_deflate模块在一定程度上支持它，我不太清楚nginx can handle compressed requests是否支持压缩请求主体。

发送时添加到标题：

JSON : "Accept-Encoding" : "gzip, deflate"

客户代码：

HttpUriRequest request = new HttpGet(url);
request.addHeader("Accept-Encoding", "gzip");

@JulianReschke指出，可能会出现这样的情况：

"Content-Encoding" : "gzip, gzip"

因此扩展服务器代码将为：

InputStream in = response.getEntity().getContent();
Header encodingHeader = response.getFirstHeader("Content-Encoding");

String gzip = "gzip";
if (encodingHeader != null) {
    String encoding = encodingHeader.getValue().toLowerCase();
    int firstGzip = encoding.indexOf(gzip);
    if (firstGzip > -1) {
      in = new GZIPInputStream(in);
      int secondGzip = encoding.indexOf(gzip, firstGzip + gzip.length());
      if (secondGzip > -1) {
        in = new GZIPInputStream(in);
      }
    }
}

我假设nginx被用作负载平衡器或代理，因此您需要设置tomcat来执行解压缩。
将以下属性添加到Tomcat上server.xml中的连接器，

<Connector 
compression="on"
compressionMinSize="2048"
compressableMimeType="text/html,application/json"
... />

在tomcat中接受gzip请求则是另一回事，你必须在你的servlet前放置一个过滤器来启动请求解压缩，你可以找到更多关于here的信息。