📄 chat_showmsg.java
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package ec;import javax.servlet.*;import javax.servlet.http.*;import java.io.*;import java.util.*;public class chat_showmsg extends HttpServlet { private static final String CONTENT_TYPE = "text/html; charset=GBK"; /**Initialize global variables*/ public void init() throws ServletException { } /**Process the HTTP Get request*/ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType(CONTENT_TYPE); PrintWriter out = response.getWriter(); HttpSession session=request.getSession(true); out.println("<html>"); out.println("<meta http-equiv=\"refresh\" content=\"10\">"); out.println("<head>"); out.println("<title>聊天室聊天信息列表</title>"); out.println("</head>"); out.println("<body bgcolor=\"#FFFFCC\" >"); String tempmsg; String cUserName=(String)session.getAttribute("username"); Vector chatMsg=(Vector)getServletContext().getAttribute("chatMsg"); for (int i=0;i<chatMsg.size();i++) { String s_UserName; String o_UserName; int firstPos; int lastPos; boolean ifwhisper=false; tempmsg=chatMsg.elementAt(chatMsg.size()-i-1).toString(); if (tempmsg.startsWith("#")) { ifwhisper=true; } if (ifwhisper) { firstPos=1; lastPos=tempmsg.indexOf("#",firstPos); s_UserName=tempmsg.substring(firstPos,lastPos); firstPos=lastPos+1; lastPos=tempmsg.indexOf("#",firstPos); o_UserName=tempmsg.substring(firstPos,lastPos); firstPos=lastPos+1; tempmsg=tempmsg.substring(firstPos,tempmsg.length()); if(o_UserName.equals(cUserName)) { tempmsg="<img src='new.gif'>"+tempmsg; out.println(tempmsg); } if (s_UserName.equals(cUserName)) { tempmsg="<img src='new.gif'>"+tempmsg; out.println(tempmsg); } } else { out.println(tempmsg+"<br>"); } } out.println("</body>"); out.println("</html>"); } /**Clean up resources*/ public void destroy() { }}⌨️ 快捷键说明
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