1. guava-19.0.jar   jar包自己下載，csdn有

2.web.xml
配置過濾器

 <filter>
    <filter-name>limiterFilter</filter-name>
    <filter-class>你的包名.RateLimiterFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>limiterFilter</filter-name>
    <url-pattern>你需要過濾的url</url-pattern>
  </filter-mapping>

3.RateLimiterFilter.java 程式碼

package 你的包名;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import com.google.common.util.concurrent.RateLimiter;

public class RateLimiterFilter implements Filter {

	private RateLimiter limiter = null;

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		limiter = RateLimiter.create(100);
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,
			ServletException {
		if(limiter.tryAcquire()) {
			request.setAttribute("limiter", "ok");
			chain.doFilter(request, response);
        }
	}

	@Override
	public void destroy() {

	}

}
 

4.action

@Controller
@Scope(value = "prototype")
public class TestAction extends BaseAction implements ModelDriven<T>{

	
	
	public void search() throws Exception{
		
		Map<String, Object> resMap = new HashMap<String, Object>();
		if(!"ok".equals(request.getAttribute("limiter"))){
			resMap.put("status","error");
			resMap.put("reason","訪問人數太多，請稍後訪問");
			writeJSON(resMap);
			return;
		}
		// 你的正常邏輯
	}