SSM框架拦截器应用-IP过滤

应客户要求对未注册的IP地址进行拦截
SSM框架搭建参考之前文章（谢谢）
1 创建一个类并实现HandlerInterceptor接口

package com.yx.web.interceptor;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Iterator;
import java.util.Properties;

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

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

import com.yx.web.utils.UtilUms;

public class IpInterceptor implements HandlerInterceptor {

    @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 arg1,
            Object arg2) throws Exception {
        // TODO Auto-generated method stub


    }
}

2 重写其中的preHandle方法

@Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse arg1,
            Object arg2) throws Exception {
        // TODO Auto-generated method stub
        String ip;
        ip = request.getHeader("x-forwarded-for");
        //针对IP是否使用代理访问进行处理
        if (UtilUms.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (UtilUms.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (UtilUms.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        if (ip != null && ip.indexOf(",") != -1) {
            ip = ip.substring(0, ip.indexOf(","));
        }

         Properties prop = new Properties();     
                      //读取属性文件a.properties
            String contextPath = this.getClass().getClassLoader().getResource("/").getPath();
            String path=contextPath+"/ip.properties";
                  InputStream in = new BufferedInputStream (new FileInputStream(path));
                  prop.load(in);     ///加载属性列表
                  Iterator<String> it=prop.stringPropertyNames().iterator();
                  while(it.hasNext()){
                     String key=it.next();
                  //    System.out.println(key+":"+prop.getProperty(key));
                     if(prop.getProperty(key).equals(ip)){
                         return true;
                     }
                  //   System.out.println(ip);
                 //    System.out.println("ip白名单过滤"+prop.getProperty(key).equals(ip));
                  }
           in.close();
        return false;//改为false
    }

3 在springMvc中配置拦截器

<!--拦截器 -->
    <mvc:interceptors>
    <!--多个拦截器,顺序执行 -->
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <bean class="com.yx.web.interceptor.IpInterceptor"></bean>
        </mvc:interceptor>
    </mvc:interceptors>

注：为方便建立demo，ip配置在了ip.properties中，如有需求请在数据库进行操作
ip.properties：

ip1=192.168.0.1
ip2=192.168.1.3