commons-httpclient post请求乱码问题记录(非编码问题,gzip格式问题)

最近工作中需要使用commons-httpclient模拟请求拿到返回值，在浏览器上面直接请求很正常，如图 ：但是代码返回的结果却是乱码，如下：

byte[] bs = new byte[] { 31, -117, 8, 0, 0, 0, 0, 0, 0, 0, -85, 86, 42,
-54, 47, 47, 86, -78, -118, -82, 86, 42, -82, 44, 14, -87, 44,
72, 85, -78, 82, 50, 84, -46, 81, 42, 45, 78, 45, -14, 76, 1,
114, -116, 77, -52, -108, 106, 99, 117, -108, -118, 74, -14,
-100, -13, 83, 32, -46, -75, 0, -27, 121, -125, -98, 55, 0, 0,
0 };
String r2 = new String(bs, "utf-8");
String r3 = new String(bs, "gbk");
String r4 = new String(bs, "ISO8859-1");
String r5 = new String(bs);
String r6 = new String(r3.getBytes(), "utf-8");
System.out.println(r2);
System.out.println(r3);
System.out.println(r4);
System.out.println(r5);
System.out.println(r6);

确定不是编码问题后，反编译jar，debug看代码，试了很多次都没发现问题，偶然发现浏览器返回的值是用gzip编码的，如下 ：而是试着看下模拟请求是否也是一样，结果如下 ：  确定原因后，只要解压一下就可以了 ：if(rtnStatus==200){Header[] header=post.getResponseHeaders("Content-Encoding");if(header!=null&&header.length>0){if("gzip".equals(header[0].getValue())){rtnJson = new String(uncompress(post.getResponseBody()));}else{rtnJson = new String(post.getResponseBody(), "UTF-8");}}else{rtnJson = new String(post.getResponseBody(), "UTF-8");}}

public static String uncompress(byte[] bytes) throws IOException {if (bytes == null || bytes.length == 0) {return "";}ByteArrayOutputStream out = new ByteArrayOutputStream();ByteArrayInputStream in = new ByteArrayInputStream(bytes);GZIPInputStream gunzip = new GZIPInputStream(in);byte[] buffer = new byte[256];int n;while ((n = gunzip.read(buffer)) >= 0) {out.write(buffer, 0, n);}return out.toString("utf-8");}

结果如下 ：全文完。