1 <%@ page contentType="text/html; charset=gb2312"%> 2 <html> 3 <body> 4 <form action="show.jsp" method="post"> 5 输入名字：<input type="text" name="name"><br> 留言标题：<input 6 type="text" name="title"><br> 留言:<br> 7 <textarea rows="10" cols="30" name="text" wrap="physical"></textarea> 8 <br> <input type="submit" value="提交"><br> 9 </form> 10 <form action="chuli.jsp" method="get"> 11 <input type="submit" name="look" value="查看留言板"><br> 12 </form> 13 14 15 </body> 16 </html>
<%@ page contentType="text/html; charset=gb2312"%> <%@page import="java.util.Vector"%> <%@ page import="java.util. *"%> <% request.setCharacterEncoding("gb2312"); String name = request.getParameter("name"); String title = request.getParameter("title"); String text = request.getParameter("text"); if (name == null || name.length() == 0) name = ""; if (title == null || title.length() == 0) title = ""; if (text == null || text.length() == 0) text = ""; String s = name + "#" + title + "#" + text; add(s); %> <%!Vector vector = new Vector(); ServletContext application; //有些服务器不直接支持application对象， //必须用ServletContext 类类声明这个对象， //再使用getServletContext方法 //对application对象初始化 int i = 0; synchronized void add(String s) { application = getServletContext(); i++; vector.add("NO." + i + "," + s); application.setAttribute("mess", vector); //如果添加的2个对象的关键字相同，则先前的关键字被清除,mess叫索引关键字 }%> <a href="chuli.jsp">返回留言界面</a>
<%@ page contentType="text/html; charset=gb2312"%> <%@ page import="java.util.Vector"%> <%!public String handString(String s) { try { byte b[] = s.getBytes("gb2312"); s = new String(b); } catch (Exception exp) { } return s; }%> <% Vector vector = (Vector) application.getAttribute("mess"); //因为任何对象都可以添加到application中，取回对象时， //所以要强制转回原来的类型。 for (int i = 0; i < vector.size(); i++) { //vector的长度就是vector.size(); String message = (String) vector.elementAt(i); //Vector就是一个放数据的地方啊。elementat(i)就是取出数据的作用 String str[] = message.split("#"); out.print("留言人:" + handString(str[0]) + ";"); out.print("标题:" + handString(str[1]) + "<br>"); out.print("留言内容:" + "<br>" + handString(str[2])); } %> <a href="input.jsp">返回主界面</a>