性别：男<input type="radio" name="sex" value="男" />
String sex =request.getParameter("sex");
This time the value of a string of sex get a garbled "?? *";
new String(sex.getBytes("iso-8859-1"),"utf-8")
Get the number of bytes of the original (native format "iso-8859-1") by the getBytes, the number of bytes in a String, to obtain normal values in UTF-8 Reconstruction