<span style="font-family:Comic Sans MS;">public class NewXssHttpServletRequestWrapper extends HttpServletRequestWrapper {

	HttpServletRequest orgRequest = null;
	
	public NewXssHttpServletRequestWrapper(HttpServletRequest request) {
		super(request);
        orgRequest = request;
	}
	

    /**
     * 覆盖getParameter方法，将参数名和参数值都做xss过滤。<br/>
     * 如果需要获得原始的值，则通过super.getParameterValues(name)来获取<br/>
     * getParameterNames,getParameterValues和getParameterMap也可能需要覆盖
     */
    @Override
    public String getParameter(String name)
    {
    	System.out.println("NewXssFilter处理前的 Value = " + super.getParameterValues(name));
    	
        String value = super.getParameter(xssEncode(name));
        if (value != null)
        {
            value = xssEncode(value);
        }
        
        System.out.println("NewXssFilter处理后的 Value = " + value);
        
        return value;
    }

    /**
     * 覆盖getHeader方法，将参数名和参数值都做xss过滤。<br/>
     * 如果需要获得原始的值，则通过super.getHeaders(name)来获取<br/> getHeaderNames 也可能需要覆盖
     */
    @Override
    public String getHeader(String name)
    {

        String value = super.getHeader(xssEncode(name));
        if (value != null)
        {
            value = xssEncode(value);
        }
        return value;
    }

    /**
     * 将容易引起xss漏洞的半角字符直接替换成全角字符
     * 
     * @param s
     * @return
     */
    private static String xssEncode(String s)
    {
        if (s == null || s.isEmpty())
        {
            return s;
        }
        
        StringReader reader = new StringReader( s );
        StringWriter writer = new StringWriter();
        try {
            HTMLParser.process( reader, writer, new XSSFilter(), true );
            
            return writer.toString();
        } 
        catch (NullPointerException e) {
            return s;
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
        }
        
        return null;
        
    }

    /**
     * 获取最原始的request
     * 
     * @return
     */
    public HttpServletRequest getOrgRequest()
    {
        return orgRequest;
    }

    /**
     * 获取最原始的request的静态方法
     * 
     * @return
     */
    public static HttpServletRequest getOrgRequest(HttpServletRequest req)
    {
        if (req instanceof NewXssHttpServletRequestWrapper)
        {
            return ((NewXssHttpServletRequestWrapper) req).getOrgRequest();
        }

        return req;
    }

}</span>

<span style="font-family:Comic Sans MS;">public class NewXssFilter implements Filter {

	FilterConfig filterConfig = null;

	@Override
	public void destroy() {
		this.filterConfig = null;
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		String path = ((HttpServletRequest) request).getContextPath();
		String basePath = request.getScheme() + "://" + request.getServerName()
				+ ":" + request.getServerPort() + path + "/";

		// HTTP 头设置 Referer过滤
		String referer = ((HttpServletRequest) request).getHeader("Referer"); // REFRESH
		if (referer != null && referer.indexOf(basePath) < 0) {
			((HttpServletRequest) request).getRequestDispatcher(
					((HttpServletRequest) request).getRequestURI()).forward(
					((HttpServletRequest) request), response);
			System.out.println("referer不为空，referer >>>>>>>>>>>>>> " + referer);
		}
		NewXssHttpServletRequestWrapper xssRequest = new NewXssHttpServletRequestWrapper((HttpServletRequest) request);
		chain.doFilter(xssRequest, response);
	}

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		this.filterConfig = filterConfig;
	}

}</span>

<span style="font-family:Comic Sans MS;"><filter>
	<filter-name>XssSqlFilter</filter-name>
	<filter-class>com.***.web.common.NewXssFilter</filter-class>
</filter>
<filter-mapping>
	<filter-name>XssSqlFilter</filter-name>
	<url-pattern>/*</url-pattern>
	<dispatcher>REQUEST</dispatcher>
</filter-mapping></span>