最近工作中需要使用commons-httpclient模擬請求拿到返回值，在瀏覽器上面直接請求很正常，如圖 ：

但是程式碼返回的結果卻是亂碼，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);

確定不是編碼問題後，反編譯jar，debug看程式碼，試了很多次都沒發現問題，

偶然發現瀏覽器返回的值是用gzip編碼的，如下 ：

而是試著看下模擬請求是否也是一樣，結果如下 ：

  確定原因後，只要解壓一下就可以了 ：

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");
}

結果如下 ：

全文完