jstl基础代码

来源：互联网发布：淘宝友情链接怎么设置编辑：程序博客网时间：2024/05/18 01:26

<%@ 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"> </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: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>