Filter过滤编码

class EnhanceRequest extends HttpServletRequestWrapper{

private HttpServletRequest request;

public EnhanceRequest(HttpServletRequest request) {
    super(request);
    this.request = request;
}

//对getParaameter增强
@Override
public String getParameter(String name) {
    String parameter = request.getParameter(name);//乱码
    try {
        parameter = new String(parameter.getBytes("iso8859-1"),"UTF-8");
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    return parameter;
}