1.2016-06-28
(1)
request.getHeader("User-Agent"); //就是取得客户端的系统版本
request.getRemoteAddr(); //取得客户端的IP
request.getRemoteHost() //取得客户端的主机名
request.getRemotePort(); //取得客户端的端口
request.getRemoteUser(); //取得客户端的用户
request.getLocalAddr(); //取得服务器IP
request.getLocalPort(); //取得服务器端口
(2)
获取登录用户的IP
public String getRemortIP() throws Exception {
HttpServletRequest request = this.getRequest();
String ip = "";
if (request.getHeader("x-forwarded-for") == null) {
ip = request.getRemoteAddr();
} else {
ip = request.getHeader("x-forwarded-for");
}
return ip;
}
/**
* 获取当前服务器ip
*/
public static String getServerIp() throws UnknownHostException{
String ip=InetAddress.getLocalHost().getHostAddress();
return ip;
}
获取本机ip
public static String getIp(){
String ip = "";
try {
InetAddress inet = InetAddress.getLocalHost();
ip = inet.getHostAddress();
} catch (UnknownHostException e) {
e.printStackTrace();
}
return ip;
}
(3)
1、JSP中获得当前应用的相对路径和绝对路径
根目录所对应的绝对路径:request.getRequestURI()
文件的绝对路径 :application.getRealPath(request.getRequestURI());
当前web应用的绝对路径 :application.getRealPath("/");
取得请求文件的上层目录:new File(application.getRealPath(request.getRequestURI())).getParent()
2 Servlet中获得当前应用的相对路径和绝对路径
根目录所对应的绝对路径:request.getServletPath();
文件的绝对路径 :request.getSession().getServletContext().getRealPath(request.getRequestURI())
当前web应用的绝对路径 :servletConfig.getServletContext().getRealPath("/");
(ServletContext对象获得几种方式:
javax.servlet.http.HttpSession.getServletContext()
javax.servlet.jsp.PageContext.getServletContext()
javax.servlet.ServletConfig.getServletContext()
)
3.Java类中获得绝对路径
根据java.io.File的Doc文挡,可知: 默认情况下new File("/")代表的目录为:System.getProperty("user.dir")。