HttpServletRequest显示汉字出错，求教

Question

HttpServletResponse.setCharacterEncoding("gb2312");

Answer 1

我按照你的建议是这么改的，还是不正确：
public static String getStringC(HttpServletRequest httpservletrequest, String s)
    { 
        httpservletrequest.setCharacterEncoding("gb2312");
        String s1 = httpservletrequest.getParameter(s);
        if(s1 != null && !s1.equals(""))
            return s1;
        else
            return null;
    }提示的错误信息：
D:\java\jsp>javac ParamUtil.java
ParamUtil.java:23: unreported exception java.io.UnsupportedEncodingException; mu
st be caught or declared to be thrown
                httpservletrequest.setCharacterEncoding("gb2312");
                                  ^
1 error