Tomcat to Apache PHP coded convert __

Server local encoding: GBK
Response Encoding: iso-8859-1 (Tomcat server Default response encoding iso-8859-1)
Output: gbk->iso-8859-1
Right way:
1, change response code response.setcharacterencoding ("GBK");
2. String result = new String (Str.getbyte ("GBK"), "iso-8859-1");

Input:
1, if response is ISO-8859-1:ISO-8859-1->GBK (This step is PHP automatic)
2, if response is GBK:GBK->GBK (This step is PHP automatic)
Code for the PHP page itself: UTF-8
The correct method gbk->utf-8:mb_convert_encoding (file_get_contents ($url), "UTF-8", "GBK");