1.s=new String(s.getBytes(),"iso-8859-1");
2.s=new String(s.getBytes(),"gb2312");
3.s=new String(s.getBytes("iso-8859-1"),"gb2312");
4.s=new String(s.getBytes("gb2312"),"iso-8859-1");
5.s=new String(s.getBytes("iso-8859-1"));
6.s=new String(s.getBytes("gb2312"));