jsp九大内置对象
1.out
<%
out.println("<h2>静夜思</h2>");
out.println("床前明月光<br>");
out.println("疑是地上霜<br>");
out.println("举头望明月<br>") ;
out.println("低头思故乡<br>");
%>
缓冲区的大小：<%=out.getBufferSize() %> byte<br>
缓冲区剩余大小<%= out.getRemaining() %> byte<br>
2. get 和post
<body>
<h1> 用户登录</h1>
<hr>
<form action = "dologin.jsp" name="loginForm" method="post">
<table>
<tr>
<td>用户名：</td>
<td><input type="text" name="username"/></td>
</tr>
<tr>
<td>密码：</td>
<td><input type="password" name="username"/></td>
</tr>
<tr>
<td colspan ="2"><input type="submit" value="登录"></td>
</tr>
</table>
</form>
</body>
3.request
<form name ="regForm" action="request.jsp" methed="post"> 用户<input type="text" name="username"/> <br> 爱好 <input type="checkbox" name ="favorite" value="read">读书 <input type="checkbox" name ="favorite" value="music">音乐 <input type="checkbox" name ="favorite" value="movie">电影 <input type="checkbox" name ="favorite" value="interent">上网 <br><br><br> <input type="submit" value="提交"> </form>
<% request.setCharacterEncoding("utf-8"); %> 用户名:<%=request.getParameter("username") %> 爱好：<% String [] f = request.getParameterValues("favorite"); for(int i = 0 ; i < f.length ; i ++){ out.println(f[i] + "  "); } %>
