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【Java】从文本中提取出ip地址

作者:1003462571 / 发布于2015/8/3/ 612

随意从textaraa中粘贴一段文本，提交抓取ip地址，一个ip地址一行。


	前端html页面，
	<form action="/IpClServlet" method="post">
	 获取ip地址：
	 <textarea rows="25" cols="30" name="alltext"></textarea>
	 <input type="submit" value="提交" />
	</form>
	
	
	IPClServlet的代码：
	public class IpClServlet extends HttpServlet {
	 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	 request.setCharacterEncoding("utf-8");
	 response.setContentType("text/html;charset=utf-8");
	 response.setCharacterEncoding("utf-8");
	 PrintWriter out = response.getWriter();
	 String alltext = request.getParameter("alltext");
	 String lines[] = alltext.split("\r\n");
	 for(int i=0; i<lines.length;i++){
	 //out.println(lines[i]+"");
	 //匹配到ip地址
	 Pattern ipreg = Pattern.compile("\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}");
	 Matcher ip = ipreg.matcher(lines[i]);
	 while(ip.find()){
	 out.println(ip.group()+"");
	 }
	 }
	 }
	
	 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	 this.doPost(request, response);
	 }
	}

试试其它关键字

　ip地址　

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