直接上代码：

public class WeiXinFilter implements Filter{

private static Logger logger = LoggerFactory.getLogger(WeiXinFilter.class);

public void init(FilterConfig fConfig) throws ServletException {}

public void destroy() {}

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

HttpServletRequest req = (HttpServletRequest)request;

HttpServletResponse resp = (HttpServletResponse)response;

String requestURL = req.getRequestURL().toString();

String queryStr = req.getQueryString();

// add timestamp to static resource, to avoid cache

if(requestURL != null && (requestURL.endsWith(".js") || requestURL.endsWith(".css"))){// static resource

String newURL = null;

if(StringUtils.isNotBlank(queryStr) && queryStr.trim().indexOf(ParameterConfig.STATIC_TAIL) == -1){

newURL = requestURL + "?" + queryStr + "&" + ParameterConfig.STATIC_TAIL + new Date().getTime();

resp.sendRedirect(newURL);

return;

}

if(StringUtils.isBlank(queryStr)){

newURL = requestURL + "?" + ParameterConfig.STATIC_TAIL + new Date().getTime();

resp.sendRedirect(newURL);

return;

}

try{

chain.doFilter(request, response);

}catch(Exception e){

logger.error(e.toString());

}

return;

}

public class ParameterConfig

{

/** 静态资源 为防止缓存，加上时间戳标志 */

public static final String STATIC_TAIL = "__oawx_t=";

配置下过滤器就行了，chrome 调试的效果如下，可以看到  chrome浏览器在获取css和js文件时，路径上携带了时间戳：

在开发阶段还是比较有用的。