jstl基础代码

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<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ page contentType="text/html;charset=utf-8" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'MyJsp.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css" mce_href="styles.css">
-->
</head>
<body>
This is my JSP page.
<c:out value="first"/>
<c:out value="${header['user-agent']}"></c:out>
<c:out value="${p}">default001</c:out>
<c:out value="hellojsp2.0"/>
<c:out value="${2+4}"/>
<c:out value="${param.data}" default="no data"/>
<c:out value="have speical" escapeXml="true"/>
<c:set var="number" value="${1+1}" scope="session"/>
<c:out value="${number}"/>
${number}************
<c:set var="number1" scope="page" >
(1+1)
</c:set>
<c:remove var="number1" scope="page"/>
<c:out value="${number1}" default="removed"/>
<c:catch var="catchname">
<%
String ef="no number";
int i=Integer.parseInt(ef);
%>
</c:catch>
${catchname }
<c:if test="${param.username=='admin'}" var="condition" scope="page">
(if test)user***admin
</c:if>
${condition }
<c:choose>
<c:when test="${param.username=='admin'}">
user****admin
</c:when>
<c:when test="${param.username=='superadmin'}">
user****superadmin
</c:when>
<c:otherwise>
user****no permission
</c:otherwise>
</c:choose>
<%
String[] atts=new String[5];
for(int i=0;i<atts.length;i++){
atts[i]="array"+i;
System.out.println(atts[i]);
}
session.setAttribute("arraytest",atts);
%>
<c:forEach items="${arraytest}" var="at">
<c:out value="${at}"/>
</c:forEach>
<%
//ArrayList<String> alist = new ArrayList<String>();
List<String> alist = new ArrayList<String>();
for(int i=0;i<atts.length;i++){
alist.add("arraylist"+i);
}
session.setAttribute("alist",alist);
Set<String> settest = new HashSet<String>();
for(int i=0;i<atts.length;i++){
settest.add("hashset"+i);
}
session.setAttribute("hashset",settest);
Map<String,String> hashmap = new HashMap<String,String>();
for(int i=0;i<atts.length;i++){
hashmap.put("key"+i,"value"+i);
}
session.setAttribute("hashmap",hashmap);
ArrayList<Object> doublearraylist = new ArrayList<Object>();
for(int i=0;i<atts.length;i++){
doublearraylist.add(atts);
}
session.setAttribute("doublearraylist",doublearraylist);
ArrayList<Object> doublearraylisthash = new ArrayList<Object>();
for(int i=0;i<atts.length;i++){
doublearraylisthash.add(hashmap);
}
session.setAttribute("doublearraylisthash",doublearraylisthash);
//Map<?,?> hashtableproperties = System.getProperties();
//Set<?> settest2 = hashtableproperties.entrySet();
//Iterator<?> itror = settest2.iterator();
//while(itror.hasNext()){
//String keystr =(String)itror.next();
//System.out.println("%%%%%%%%%"+keystr);
//}
Properties p = new Properties();
p.setProperty("propertieskey","propertiesvalue");
session.setAttribute("properties",p);
%>
<c:forEach items="${alist}" var="at">
<c:out value="${at}"/>
</c:forEach>
<c:forEach items="${hashset}" var="at">
<c:out value="${at}"/>
</c:forEach>
<c:forEach items="${hashmap}" var="at">
<c:out value="${at.key}"/>::::::::<c:out value="${at.value}"/>
</c:forEach>
--------------double loop start----------
<c:forEach items="${doublearraylist}" var="at">
<c:forEach items="${at}" var="at1">
<c:out value="${at1}"/>
</c:forEach>
</c:forEach>
--------------double loop end----------
--------------double loop hasharraylist start----------
<c:forEach items="${doublearraylisthash}" var="at">
<c:forEach items="${at}" var="at1">
<c:out value="${at1.key}"/>&&&&&&&&&&&&6<c:out value="${at1.value}"/>
</c:forEach>
</c:forEach>
--------------double loop hasharraylist end----------
--------------properties start----------
<c:forEach items="${properties}" var="at1">
<c:out value="${at1.key}"/>@@@@@properties@@@@@@@<c:out value="${at1.value}"/>
</c:forEach>
--------------properties end----------
--------------step start----------
<c:forEach items="${arraytest}" var="at1" begin="1" end="4" step="2">
<c:out value="${at1}"/>
</c:forEach>
--------------step end----------
<%
int[] intarray = new int[10];
for(int i=0;i<10;i++){
intarray[i]=i;
}
session.setAttribute("intarray",intarray);
%>
<c:forEach items="${intarray}" var="item" varStatus="s">
<c:if test="${s.count%2==0}"></c:if>
<c:if test="${s.count%2==1}"></c:if>
<c:out value="${item}"/>
index*****<c:out value="${s.index}"/>
count*****<c:out value="${s.count}"/>
first*****<c:out value="${s.first}"/>
last*****<c:out value="${s.last}"/>
</c:forEach>
<%
//
//<!-- <c:import url="http://www.google.cn/music/homepage">
//<c:param name="hl" value="zh-CN"></c:param>
//<c:param name="tab" value="wU"></c:param>
//</c:import>-->
//<!-- <c:redirect url="http://java.sun.com" >
//</c:redirect>-->
%>
<c:forTokens items="1,2,5,7,8,56,tytr,;76gh,7,,87" delims="," var="as">
<c:out value="${as}"></c:out>
</c:forTokens>
<fmt:formatNumber value="12" pattern="0.00000" ></fmt:formatNumber>
<jsp:useBean id="now" class="java.util.Date"></jsp:useBean>
<fmt:formatDate value="${now}" pattern="yyyy-MM-dd" />
<fmt:setBundle basename="/resources/app" var="app"/>
<fmt:message key="dbname" bundle="${app}"/>
<fmt:message key="app.name" bundle="${app}"/>
<fmt:bundle basename="../resources/app">
<fmt:message key="app.name" />
</fmt:bundle>
<sql:setDataSource
url="jdbc:postgresql://localhost/mydb"
driver="org.postgresql.Driver"
user="postgres"
password="19810101"
var="mydatasource"
scope="session"
/>
<sql:query var="student" dataSource="${mydatasource}">
select * from student order by stuno
</sql:query>
<table border="1" bordercolor="#cc2211">
<tr >
<td>stuno</td>
<td>stuname</td>
<td>score</td>
</tr>
<c:forEach var="row" items="${student.rows}">
<tr>
<td><c:out value="${row.stuno}"/></td>
<td><c:out value="${row.stuname}"/></td>
<td><c:out value="${row.stuscore}"/></td>
</tr>
</c:forEach>
</table>
good
<c:out value="${fn:length('8886776')}"/>
<%
//<c:set var="score" value="90"></c:set>
////<c:set var="sno" value="1001"></c:set>
//// <c:set var="stardate" value="${now}" ></c:set>
//<sql:transaction dataSource="${mydatasource}">
//<sql:update>
//////update student set stuscore=?,startdate=? where stuno=to_number(?,'99999')
//<sql:param value="${score}"></sql:param>
//<sql:dateParam value="${stardate}" type="timestamp"></sql:dateParam>
//<sql:param value="${sno}"></sql:param>
//</sql:update>
//</sql:transaction>
%>
</body>
</html>

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