Spring3 MVC 攔截器

jopen 11年前發布 | 47K 次閱讀 Spring MVC Web框架 Spring3 MVC

Spring3 MVC 攔截器


我這里定義一個全局的攔截器：

<!-- 攔截器 -->  
    <mvc:interceptors>  
        <mvc:interceptor>  
            <mvc:mapping path="/*.do" />  
            <bean class="com.log.report.interceptor.AccessStatisticsIntceptor" />  
        </mvc:interceptor>  
    </mvc:interceptors>

定義在servlet-config.xml文件中。

以下是一個攔截器，它用來記錄訪問的ip和流量。
攔截器需要實現HandlerInterceptor接口，同時實現相應的方法。在PreHandler方法中，返回值如果是false，就會攔截住請求。

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class AccessStatisticsIntceptor implements HandlerInterceptor {

    public static long access_num = 0;
    public static Map<String,Long> IPMap = new HashMap<String,Long>();
    public static Map<String,Long> urlMap = new HashMap<String,Long>();

    @Override
    public void afterCompletion(HttpServletRequest arg0,
            HttpServletResponse arg1, Object arg2, Exception arg3)
            throws Exception {
        // TODO Auto-generated method stub

    }

    @Override
    public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
            Object arg2, ModelAndView arg3) throws Exception {
        // TODO Auto-generated method stub

    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
            Object obj) throws Exception {

            access_num += 1;

            SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
            Date now = new Date();

            String ip = request.getHeader("x-forwarded-for");    
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {    
                ip = request.getHeader("Proxy-Client-IP");    
            }    
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {    
                ip = request.getHeader("WL-Proxy-Client-IP");    
            }    
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {    
                ip = request.getRemoteAddr();    
            }   

            String url = request.getRequestURI() != null ? request.getRequestURI().toString() : null;
            url= sdf.format(now) + "-" + url;
            if(url != null && urlMap.containsKey(url)) {
                urlMap.put(url, urlMap.get(url) + 1 );
            } else if(url != null) {
                urlMap.put(url, 1l);
            }

            String key = sdf.format(now) + "-" + ip;

            if(IPMap.containsKey(key)) {
                IPMap.put(key, IPMap.get(key) + 1 );
            } else {
                IPMap.put(key, 1l);
            }
        return true;
    }

}


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