<%@page import="com.Student"%>
<%@page import="com.Person"%>
<%@page import="sun.security.provider.MD2"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<jsp:useBean id="person" class="com.Person"></jsp:useBean>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body>
<h3>set赋值取值的四种方式</h3>
<c:set value="张三" var="name1" scope="session"></c:set>
<c:set var="name2" scope="session">李四</c:set>
<c:set value="赵五" target="${person}" property="name"></c:set>
<c:set target="${person}" property="age">19</c:set>
<li>从session中得到的值：${sessionScope.name1}</li>
<li>从session中得到的值：${sessionScope.name2}</li>
<li>从Bean中获取对象person的name值：<c:out value="${person.name}"></c:out></li>
<li>从Bean中获取对象person的age值：<c:out value="${person.age}"></c:out></li>
<hr>
<h3>set与bean进行赋值取值</h3>
<c:set value="赵五" target="${person}" property="name"></c:set>
<c:set target="${person}" property="age">19</c:set>
<c:if test="${person.name == '赵武'}" var="name1"></c:if>
<c:out value="name1的值：${name1}"></c:out><br/>
<c:if test="${person.name == '赵五'}" var="name2"></c:if>
<c:out value="name2的值：${name2}"></c:out>
<hr>
<h3>判断的使用</h3>
<c:set var="score">65</c:set>
<c:choose>
<c:when test="${score>=90}">
你的成绩为优秀！
</c:when>
<c:when test="${score>=70&&score<90}">
您的成绩为良好!
</c:when>
<c:when test="${score>60&&score<70}">
您的成绩为及格
</c:when>
<c:otherwise>
对不起，您没有通过考试！
</c:otherwise>
</c:choose>
<hr>
<h3>foreach遍历集合</h3>
<%
List list = new ArrayList();
list.add("aaa");
list.add("bbb");
list.add("ccc");
list.add("ddd");
list.add("eee");
request.setAttribute("req", list);
%>
<c:forEach var="name" items="${req}">
<c:out value="${name}"></c:out><br/>
</c:forEach>
<hr>
<c:forEach var="name" items="${req}" begin="1" end="4" step="1">
<c:out value="${name}"></c:out><br/>
</c:forEach>
<hr>
<c:forEach var="name" items="${req}" begin="1" end="30" step="1" varStatus="s">
<c:out value="${name}"></c:out><br/>
所在位置：<c:out value="${s.index}"></c:out><br/>
总共已迭代的次数<c:out value="${s.count}"></c:out><br/>
是否为第一个位置：<c:out value="${s.first}"></c:out><br/>
是否为最后一个位置：<c:out value="${s.last}"></c:out><br/>
</c:forEach>
<hr>
<c:forTokens var="t" items="1,2,3,4,5,6,7" delims=",">
<c:out value="${t}"></c:out><br/>
</c:forTokens>
<hr>
<h3>import文件路径的导入</h3>
<c:catch var="error01">
<c:import url="http://www.baidu.com"></c:import>
</c:catch>
<c:out value="${error01 }"></c:out>
<hr>
<c:catch var="error02">
<c:import url="01.txt" charEncoding="gbk"></c:import>
</c:catch>
<hr>
<c:catch var="error3">
<c:import var="myurl" url="01.txt" scope="session" charEncoding="gbk"></c:import>
<c:out value="${myurl}"></c:out>
<c:out value="${myurl}" />
</c:catch>
<c:out value="${error3}"></c:out>
<hr/>
<h3>时间段的判断</h3>
<jsp:useBean id="now" class="java.util.Date"></jsp:useBean>
<c:choose>
<c:when test="${now.hours>=0 && now.hours<5}">凌晨好</c:when>
<c:when test="${now.hours>=5 && now.hours<8}">早上好</c:when>
<c:when test="${now.hours>=8 && now.hours<11}">上午好</c:when>
<c:when test="${now.hours>11 && now.hours<13}">中午好</c:when>
<c:when test="${now.hours>=13 && now.hours<17}">下午好</c:when>
<c:otherwise>晚上好</c:otherwise>
</c:choose>
现在的时间是：${now.hours}时${now.minutes}分${now.seconds}秒
<hr/>
<h3>登录记录</h3>
<c:choose>
<c:when test="${empty sessionScope.user}">
<form action="deal.jsp" method="post" name="form1">
<ul>
<li>用户昵称：<input name="user" type="text" id="user" /></li>
<li>密 码：<input name="pwd" type="password" id="pwd" /></li>
<li><input name="Submit" type="submit" value="登录" />
<input name="Submit2" type="reset" value="重置" /></li>
</ul>
</form>
</c:when>
<c:otherwise>
欢迎${sessionScope.user}[<a href="logout.jsp">退出</a>]
</c:otherwise>
</c:choose>
<hr/>
<h3>异常的捕获与打印</h3>
<c:catch var="exception">
<%
int num = Integer.valueOf(request.getParameter("name"));
out.print(num);
%>
</c:catch>
<c:out value="${exception}"></c:out>
<hr>
<c:url var="path" value="register.jsp" scope="page">
<c:param name="user" value="mr"></c:param>
<c:param name="email" value="wert"></c:param>
</c:url>
<a href="${pageScope.path}">提交</a>
<hr>
<%Random random = new Random(); %>
<c:set var="luck">
<%=random.nextInt(10) %>
</c:set>
<c:choose>
<c:when test="${luck==6}">恭喜你，中了一等奖！</c:when>
<c:when test="${day==7}" >恭喜你，中了二等奖！</c:when>
<c:when test="${day==8}">恭喜你，中了三等奖！</c:when>
<c:otherwise>谢谢您的参与！</c:otherwise>
</c:choose>
<hr>
<%
int[] ages = { 1, 2, 3, 4, 5 };
List<String> list2 = new ArrayList<String>();
list2.add("12345");
list2.add("12365");
list2.add("12385");
list2.add("12325");
request.setAttribute("list", list2);
Set<String> set = new TreeSet<String>(); // Set
set.add("One");
set.add("One");
set.add("Two");
set.add("Three");
set.add("Set");
Map<String, String> map = new HashMap<String, String>(); // Map
map.put("1", "黄彪");
map.put("2", "丫头");
map.put("3", "哥哥");
map.put("4", "笨蛋");
List<Student> list3 = new ArrayList<Student>();
list3.add(new Student("1111",11));
list3.add(new Student("43",14));
list3.add(new Student("143411",16));
list3.add(new Student("6765",12));
%>
c:forEach遍历数组集合
<br/>
<c:forEach var="age" items="<%= ages %>">
<c:out value="${age}" />
</c:forEach>
<br/>
c:forEach遍历List集合
<br/>
<c:forEach items="${requestScope.list}" var="keyword" varStatus="id">
${id.index}----${keyword}<br/>
</c:forEach>
c:forEach遍历Set集合
<br/>
<c:forEach var="entry" items="<%= set %>">
<c:out value="${entry}" />
</c:forEach>
<br/>
c:forEach遍历Map集合
<br/>
<c:forEach var="entry" items="<%= map %>">
<c:out value="${entry.key}"/>---<c:out value="${entry.value}"/> <br/>
</c:forEach>
<br/>
c:forEach遍历List对象集合
<br/>
<c:forEach var="info" items="<%=list3 %>">
<c:out value="${info.name }"></c:out>----<c:out value="${info.age }"></c:out><br/>
</c:forEach>
<br/>
</body>
</html>
package com;
public class Student {
private String name;
private int age;
public Student(String name,int age) {
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
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