Jsp应用EL和JSTL实例对比。
普通方式：
register.jsp
1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html; charset=utf-8"%> 2 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 3 <html> 4 <head> 5 </head> 6 7 <body> 8 <h1>注册用户</h1> 9 <form action="registerdo.jsp" method="post"> 10 <table> 11 <tr> 12 <td><label for="txtUserName">用户名：</label></td> 13 <td><input type="text" name="txtUserName" id="txtUserName"/></td> 14 </tr> 15 <tr> 16 <td><label for="txtLoginPwd">密码：</label></td> 17 <td><input type="password" name="txtLoginPwd" id="txtLoginPwd"/></td> 18 </tr> 19 <tr> 20 <td><label for="rdoMan">性别：</label></td> 21 <td><input type="radio" name="rdoSex" checked="checked" value="1" id="rdoMan"/><label for="rdoMan">男士</label> 22 <input type="radio" name="rdoSex" value="0" id="rdoWoman"/><label for="rdoWoman">女士</label> 23 </td> 24 </tr> 25 <tr> 26 <td><label for="selEdu" id="selEdu">学历：</label></td> 27 <td> 28 <select name="selEdu" id="selEdu"> 29 <option value="小学">小学</option> 30 <option value="中学">中学</option> 31 <option value="大学">大学</option> 32 </select> 33 </td> 34 </tr> 35 <tr> 36 <td><label for="chkLan">爱好：</label></td> 37 <td> 38 <input type="checkbox" name="chkHibby" id="chkLan" value="篮球"/><label for="chkLan">篮球</label> 39 <input type="checkbox" name="chkHibby" id="chkZu" value="足球"/><label for="chkZu">足球</label> 40 <input type="checkbox" name="chkHibby" id="chkPai" value="排球"/><label for="chkPai">排球</label> 41 </td> 42 </tr> 43 <tr> 44 <td colspan="2" style="text-align:center"> 45 <input type="submit" value="注册"/> 46 <input type="reset" value="重填"/> 47 </td> 48 </tr> 49 </table> 50 </form> 51 </body> 52 </html>
registerdo.jsp
1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8" contentType="text/html; charset=utf-8"%> 2 <% 3 request.setCharacterEncoding("utf-8"); 4 String userName = request.getParameter("txtUserName"); 5 String loginPwd = request.getParameter("txtLoginPwd"); 6 String sex = request.getParameter("rdoSex"); 7 sex = sex.equals("1")? "男" :"女"; 8 String edu = request.getParameter("selEdu"); 9 String[] hibbys = request.getParameterValues("chkHibby"); 10 %> 11 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 12 <html> 13 <head> 14 </head> 15 <body> 16 <h1>request.getParameter()</h1> 17 <table> 18 <tr> 19 <td>用户名：</td> 20 <td><%=userName %></td> 21 </tr> 22 <tr> 23 <td>密码：</td> 24 <td><%=loginPwd %></td> 25 </tr> 26 <tr> 27 <td>性别：</td> 28 <td><%=sex %></td> 29 </tr> 30 <tr> 31 <td>学历：</td> 32 <td><%=edu %></td> 33 </tr> 34 <tr> 35 <td>爱好：</td> 36 <td> 37 <% 38 for(int i = 0 ; i < hibbys.length ; i++){ 39 String hibby = hibbys[i]; 40 out.print(hibby); 41 if(i != hibbys.length-1){ 42 out.print(","); 43 } 44 } 45 %> 46 </td> 47 </tr> 48 </table> 49 </body> 50 </html>
EL和JSTL方式：
registerjstl.jsp
1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 2 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 3 <html> 4 <head> 5 </head> 6 <body> 7 <h1>注册用户</h1> 8 <form action="registerjstldo.jsp" method="post"> 9 <table> 10 <tr> 11 <td><label for="txtUserName">用户名：</label></td> 12 <td><input type="text" name="txtUserName" id="txtUserName"/></td> 13 </tr> 14 <tr> 15 <td><label for="txtLoginPwd">密码：</label></td> 16 <td><input type="password" name="txtLoginPwd" id="txtLoginPwd"/></td> 17 </tr> 18 <tr> 19 <td><label for="rdoMan">性别：</label></td> 20 <td><input type="radio" name="rdoSex" checked="checked" value="1" id="rdoMan"/><label for="rdoWan">男士</label> 21 <input type="radio" name="rdoSex" value="0" id="rdoWoman"/><label for="rdoWoman">女士</label> 22 </td> 23 </tr> 24 <tr> 25 <td><label for="selEdu" id="selEdu">学历：</label></td> 26 <td> 27 <select name="selEdu" id="selEdu"> 28 <option value="小学">小学</option> 29 <option value="中学">中学</option> 30 <option value="大学">大学</option> 31 </select> 32 </td> 33 </tr> 34 <tr> 35 <td><label for="chkLan">爱好：</label></td> 36 <td> 37 <input type="checkbox" name="chkHibby" id="chkLan" value="篮球"/><label for="chkLan">篮球</label> 38 <input type="checkbox" name="chkHibby" id="chkZu" value="足球"/><label for="chkZu">足球</label> 39 <input type="checkbox" name="chkHibby" id="chkPai" value="排球"/><label for="chkPai">排球</label> 40 </td> 41 </tr> 42 <tr> 43 <td colspan="2" style="text-align:center"> 44 <input type="submit" value="注册"/> 45 <input type="reset" value="重填"/> 46 </td> 47 </tr> 48 </table> 49 </form> 50 </body> 51 </html>
registerjstldo.jsp
1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 2 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="asp"%> 3 <%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn"%> 4 5 <% 6 request.setCharacterEncoding("utf-8"); 7 %> 8 9 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 10 <html> 11 <head> 12 </head> 13 14 <body> 15 <h1>EL和JSTL</h1> 16 <table> 17 <tr> 18 <td>用户名：</td> 19 <td>${param.txtUserName}</td> 20 </tr> 21 <tr> 22 <td>密码：</td> 23 <td>${param.txtLoginPwd}</td> 24 </tr> 25 <tr> 26 <td>性别：</td> 27 <td> 28 <asp:if test='${param.rdoSex=="1"}'> 29 男 30 </asp:if> 31 <asp:if test='${param.rdoSex=="0"}'> 32 女 33 </asp:if> 34 </td> 35 </tr> 36 <tr> 37 <td>学历：</td> 38 <td>${param.selEdu}</td> 39 </tr> 40 <tr> 41 <td>爱好：</td> 42 <td> 43 <asp:forEach var="hibby" items="${paramValues.chkHibby}" varStatus="item"> 44 ${hibby} 45 <asp:if test="${item.index != fn:length(paramValues.chkHibby) - 1 }"> 46 , 47 </asp:if> 48 </asp:forEach> 49 </td> 50 </tr> 51 </table> 52 </body> 53 </html>
