1.如果是post提交
<span style="white-space:pre"> </span>request.setCharacterEncoding("utf-8");//设置编码器
String username = request.getParameter("username");
System.out.println(username);
2.如果是get提交,则要采取手工方式
<span style="white-space:pre"> </span>String username = request.getParameter("username");
username=new String(username.getBytes("iso8859=1"),"utf=8");//采用手工方式先反向得到在默认编码器中的编码,
System.out.println(username);