HTML特殊字符过滤器

/**
 * HTML标签过滤,防止用户恶意提交带HTML标签的数据
 * 
 * @author liulg
 */
public class HTMLCharacterRequest extends HttpServletRequestWrapper {

	public HTMLCharacterRequest(HttpServletRequest request) {
		super(request);
	}

	@Override
	public String getParameter(String name) {
		String value = super.getParameter(name);
		return filter(value);
	}

	@Override
	@SuppressWarnings("unchecked")
	public Map getParameterMap() {
		Map<String, String[]> map = super.getParameterMap();
		Map<String, String[]> map_ = new HashMap<String, String[]>();

		Set<Entry<String, String[]>> set = map.entrySet();
		Iterator<Entry<String, String[]>> it = set.iterator();
		while (it.hasNext()) {
			Entry<String, String[]> entry = it.next();
			if (entry != null && entry.getValue() != null
					&& entry.getValue().length > 0) {
				String[] array = new String[entry.getValue().length];
				for (int i = 0; i < entry.getValue().length; i++) {
					array[i] = filter(entry.getValue()[i]);
				}
				map_.put(entry.getKey(), array);
			}
		}
		return map_;
	}

	@Override
	public String[] getParameterValues(String name) {
		String[] values = super.getParameterValues(name);
		if (values == null || values.length == 0)
			return values;
		for (int i = 0; i < values.length; i++) {
			String str = values[i];
			values[i] = filter(str);
		}
		return values;
	}

	private String filter(String value) {
		if (StringUtil.isNotBlank(value)) {
			value = value.replaceAll("<", "[").replaceAll(">", "]");
		}
		return value;
	}

}

/**
 * 权限访问控制
 * 
 * @author luo
 */
public class PermitFilter implements Filter {

	private static Map<String, Object> sysMenusMap = new HashMap<String, Object>();
	
	private static String[] params = null;

	private final static String LOGIN_VIEW = "/jsp/index/login.jsp";

	public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)
			throws IOException, ServletException {

		HttpServletRequest request = (HttpServletRequest) req;
		HttpServletResponse response = (HttpServletResponse) resp;
		
		String uri = request.getRequestURI();
		String contextPath = request.getContextPath();
		uri = uri.substring(contextPath.length());
		
		Object obj = request.getSession().getAttribute(Constant.USER_SESSION);
		
		
		if(obj == null){
			
			//未登录可放行的访问
			for (String p : params) {
				if (uri.startsWith(p)) {
					chain.doFilter(req, resp);
					return;
				}
			}
			//aJax访问 （未登录不可放行）
			if (request.getHeader("x-requested-with") != null
					&& request.getHeader("x-requested-with").equalsIgnoreCase( // ajax超时处理
							"XMLHttpRequest")) {
				JspUtils.print(response, "timeout");
				return;
			}
			//普通访问 （未登录不可放行）
			request.getRequestDispatcher(LOGIN_VIEW).forward(req, resp);
			
		}else{
			
			//是否越权访问
			Users user  = (Users) obj;
			List<Menu> menus = new ArrayList<Menu>(user.getRose().getMenus());
			 
			boolean flag =false;
			if(sysMenusMap.get(uri) != null){
				for (Menu menu : menus) {
					if(StringUtil.isNotBlank(menu.getMenuUrl())) 
						if(uri.equals("/"+menu.getMenuUrl())){
							flag=true;
							break;
						}	
				}
			}else{
				chain.doFilter(new HTMLCharacterRequest(request), resp);
				return;
			}
			
			
			if(flag){
//				chain.doFilter(request, resp);
				chain.doFilter(new HTMLCharacterRequest(request), resp);
				return;
			}else{
				JspUtils.print(response, "<script>alert('无权访问');</script>");
				return ;
			}
			 
		}
		
	}

	public void init(FilterConfig config) throws ServletException {
		params = config.getInitParameter("p").split(",");
		RoseDao roseDao = (RoseDao) Springs.getApp().getBean("roseDaoImpl");
		List<Menu> sysMenus =  roseDao.findAllMenuBy_URL_NOTNULL();
		for (Menu menu : sysMenus) {
			sysMenusMap.put("/"+menu.getMenuUrl(), menu.getMenuName());
		}
	}

	public void destroy() { }

	 

}