【java工具类】-web工具类获取请求主机名称和域名

谁践踏了优雅 2023-07-07 12:57 15阅读 0赞

/**
     * Web页面相关的操作
     * @author Tom
     *
     */
    public class WebUtil {
    	
    	/**
    	 * 输出字符到页面
    	 * @param response
    	 * @param contentType
    	 * @param content
    	 */
    	private static void out(HttpServletResponse response,String contentType,String content){
    		response.setCharacterEncoding("UTF-8");
    		response.setContentType(contentType + "; charset=UTF-8");
    		try{
    			PrintWriter writer = response.getWriter();
    			writer = response.getWriter();
    			writer.print(content);
    			writer.flush();
    		}catch(Exception e){
    			e.printStackTrace();
    		}
    	}
    	
    	/**
    	 * 输出json到页面
    	 * @param request
    	 * @param response
    	 * @param json
    	 */
    	public static void outJsonpToView(HttpServletRequest request,HttpServletResponse response,String json){
    			if(null == json){ json = "{\"data\":{}}";}
    			String callbackName = request.getParameter("callback");
    			String iframe = request.getParameter("iframe");
    			String script = request.getParameter("script");
    			
    			StringBuffer retrunStr = new StringBuffer();
    			
    			if("1".equals(iframe) || "1".equals(script)){
    				
    				String domain = request.getParameter("domain");
    				if(!(null == domain || "".equals(domain))){
    					retrunStr.append("window.document.domain=\"" + domain + "\";");
    				}
    				
    				if("1".equals(iframe)){
    					retrunStr.append("<script type=\"text/javascript\">");
    					retrunStr.append("window.parent." + ((callbackName == null) ? "callback" : callbackName) + "(" + json + ");");
    					retrunStr.append("</script>");
    					out(response,"text/html",retrunStr.toString());
    				}else if("1".equals(script)){
    					JSONObject obj = null;
    					try{
    						obj = JSONObject.parseObject(json);
    					}catch(Exception e){
    						out(response,"text/javascript",json);
    						return;
    					}
    				}
    			}else{
    				out(response,"application/json",((callbackName == null) ? json : (callbackName + "(" + json + ")")));
    			}
    	}
    	
    	
    	/**
    	 * 输出字符串到页面
    	 * @param request
    	 * @param response
    	 * @param str
    	 */
    	public static void outStringToView(HttpServletRequest request,HttpServletResponse response,String str){
    		out(response,"text/text",str);
    	}
    	
    	/**
    	 * 输出html到页面
    	 * @param request
    	 * @param response
    	 * @param html
    	 */
    	public static void outHtmlToView(HttpServletRequest request,HttpServletResponse response,String html){
    		out(response,"text/html",html);
    	}
    	
    	/**
    	 * 获取domain
    	 * @param request
    	 * @param response
    	 * @return
    	 */
    	public static String getDomain(HttpServletRequest request){
    		String host = request.getServerName().toLowerCase();
    		Pattern pattern = Pattern.compile("[^\\.]+(\\.com\\.cn|\\.net\\.cn|\\.org\\.cn|\\.gov\\.cn|\\.com|\\.net|\\.cn|\\.org|\\.cc|\\.me|\\.tel|\\.mobi|\\.asia|\\.biz|\\.info|\\.name|\\.tv|\\.hk|\\.公司|\\.中国|\\.网络)$");
    		Matcher matcher = pattern.matcher(host);
    		while (matcher.find()) {
    			return matcher.group();
    		}
    		return "";
    	}
    	
    	/**
    	 * 获取真实的IP地址
    	 * @param request
    	 * @return
    	 */
    	public static String getIpAddr(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.getRemoteAddr();
            }
            return ip;
    	}
    	
    }