实现思路:
1、在发送的邮件中插入一张图片。
2、对方访问该图片,后台拦截图片,获取浏览器头部信息。
3、将ip转成位置。
示例:
返回ip地址
实现代码如下:
过滤器
package com; import java.io.IOException; import java.util.HashMap; import java.util.Map; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; public class DeFilter implements Filter { @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { // 这里只拦截返回,直接让请求过去,如果在请求前有处理,可以在这里处理 chain.doFilter(request, response); new Thread(new Runnable() { @Override public void run() { // ServletRequest强转成HttpServletRequest HttpServletRequest httpRequest = (HttpServletRequest) request; // 获取请求路径 String servletPath = httpRequest.getServletPath(); // 如果请求了对应文件就获取他的ip if ("/1.jpg".equals(servletPath) || "/2.jpg".equals(servletPath)) { // 通知 String ip = getHHHIP(httpRequest); sendEmail(ip); } } }).start(); } private String getHHHIP(HttpServletRequest httpRequest) { // 获取ip String ipAddress = NetUtil.getIpAddress(httpRequest); return ipAddress; } private boolean sendEmail(String ip) { boolean flag = SendEmailUtil.sendTextEmail("邮箱定位成功!!", "您获取到的IP地址为:" + ip); return flag; } }
xml配置
<filter-name>DeFilter</filter-name> <filter-class>com.DeFilter</filter-class> </filter> <filter-mapping> <filter-name>DeFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
获取ip的工具类
package com; import javax.servlet.http.HttpServletRequest; /** * 自定义访问对象工具类 * * 获取对象的IP地址等信息 * * */ public class NetUtil { /** * 获取用户真实IP地址,不使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址, * * 可是,如果通过了多级反向代理的话,X-Forwarded-For的值并不止一个,而是一串IP值,究竟哪个才是真正的用户端的真实IP呢? * 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。 * * 如:X-Forwarded-For:192.168.1.110, 192.168.1.120, 192.168.1.130, 192.168.1.100 * * 用户真实IP为: 192.168.1.110 * * @param request * @return */ public static String getIpAddress(HttpServletRequest request) { 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.getHeader("HTTP_CLIENT_IP"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getHeader("HTTP_X_FORWARDED_FOR"); } if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) { ip = request.getRemoteAddr(); } return ip; } }
文章地址:用一封邮箱定位对方的位置