在Android系统中使用gzip进行数据传递实例代码

/**
* 判断浏览器是否支持 gzip 压缩
* @param req
* @return boolean 值
*/
public static boolean isGzipSupport(HttpServletRequest req) {
String headEncoding = req.getHeader("accept-encoding");
if (headEncoding == null || (headEncoding.indexOf("gzip") == -1)) { // 客户端 不支持 gzip
return false;
} else { // 支持 gzip 压缩
return true;
}
}
/**
* 创建 以 gzip 格式 输出的 PrintWriter 对象，如果浏览器不支持 gzip 格式，则创建普通的 PrintWriter 对象，
* @param req
* @param resp
* @return
* @throws IOException
*/
public static PrintWriter createGzipPw(HttpServletRequest req, HttpServletResponse resp) throws IOException {
PrintWriter pw = null;
if (isGzipSupport(req)) { // 支持 gzip 压缩
pw = new PrintWriter(new GZIPOutputStream(resp.getOutputStream()));
// 在 header 中设置返回类型为 gzip
resp.setHeader("content-encoding", "gzip");
} else { // // 客户端 不支持 gzip
pw = resp.getWriter();
}
return pw;
}

public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setCharacterEncoding("utf-8");
response.setHeader("Content-Encoding", "gzip");
String ret = "{\"ContentLayer\":{\"title\":\"内容层\"},\"PageLink\":{\"title\":\"页面跳转\"},\"WebBrowser\":{\"title\":\"浏览器\"},"
+ "\"InlinePage\":{\"title\":\"内嵌页面\"},\"VideoComp\":{\"title\":\"视频\"},"
+ "\"PopButton\":{\"title\":\"内容开关\"},\"ZoomingPic\":{\"title\":\"缩放大图\"},"
+ "\"Rotate360\":{\"title\":\"360度旋转\"}}";
PrintWriter pw = new PrintWriter(new GZIPOutputStream(response.getOutputStream()));
pw.write(ret);
pw.close();
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}

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{"ContentLayer":{"title":"内容层"},"PageLink":{"title":"页面跳转"},"WebBrowser":{"title":"浏览器"},"InlinePage":{"title":"内嵌页面"},"VideoComp":{"title":"视频"},"PopButton":{"title":"内容开关"},"ZoomingPic":{"title":"缩放大图"},"Rotate360":{"title":"360度旋转"}}