Admin: 1 версия

2010-06-01T07:10:29Z

1 версия

в 18:01, 31 мая 2010

2010-05-31T18:01:47Z

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== Advanced Dynamic Web Content Generation. 1 ==



<source lang="java">
/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

</source>



== Comments in JSP page ==



<source lang="java">
<html>
<HEAD>
<TITLE>Comments in a JSP</TITLE>
</HEAD>
<BODY>
<% // A Java comment inside a scriptlet - copied into the generated servlet %>
The exemplar that generated this page uses a combination of HTML, Java and JSP comments.
<%-- A JSP comment - not copied to the servlet, or the output --%>
</BODY>
</HTML>

</source>



== CSS, JavaScript, VBScript, and JSP 1 ==



<source lang="java">
/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

</source>



== CSS, JavaScript, VBScript, and JSP 2 ==



<source lang="java">

/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

</source>



== Declaration Tag Example ==



<source lang="java">
<%!
String name = "Mark";
String date = "28th April, 2004";
%>
<HTML>
<TITLE>Declaration Tag Example</TITLE>
<BODY>
This page was last modified on <%= date %> by <%= name %>.
</BODY>
</HTML>

</source>



== Declaration Tag - Methods ==



<source lang="java">
<%!
private String getName()
{
return "Rosy";
}
private int getAge()
{
return 6;
}
%>
<HTML>
<HEAD><TITLE>Declaration Tag - Methods</TITLE></HEAD>
<%= getName() %>, age <%= getAge() %>, is one funny kid!

</HTML>

</source>



== Embedding Code ==



<source lang="java">
<%!
String[] names = {"Green", "White", "Black", "Red"};
%>
<HTML>
<HEAD><TITLE>Embedding Code</TITLE></HEAD>
<BODY>
<H1>List of people</H1>
<TABLE BORDER="1">
<TH>Name</TH>
<% for (int i=0; i<names.length; i++) { %>
<TR><TD><%= names[i]%></TD></TR>
<% } %>
</TABLE>
</BODY>
</HTML>

</source>



== Expression Language Examples ==



<source lang="java">
<html>
<head>
<title>
<html>
<head>
<title>Expression Language Examples</title>
<%
// set up a page context parameter for use later in the page
// normally this would have been set within the context of
// an application
pageContext.setAttribute("pageColor", "blue");
%>
</head>
<body bgcolor="${pageScope.pageColor}">
<h1>Welcome to the ${param.department} Department</h1>
Here are some basic comparisons:
<p>
Is 1 less than 2? ${1<2} <br>
Does 5 equal 5? ${5==5} <br>
Is 6 greater than 7? ${6 gt 7}<br>
<p>Now for some math:<br>
6 + 7 = ${6+7}<br>
8 x 9 = ${8*9}<br>

<hr>You appear to be using the following browser:
${header["user-agent"]}
</body>
</html></title>

</source>



== JSP Basics ch02 ==



<source lang="java">
/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

</source>



== JSP Basics: Dynamic Page Creation for Data Presentation 2 ==



<source lang="java">

/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

<html>
<head>
<link rel=stylesheet type="text/css" href="portal.css">
<title>Select Your Portal</title></head>
<body>
<table class="mainBox" width="400">
<tr><td class="boxTitle" colspan="2">
Wrox JSP Portal Selector
</td>
</tr>
<tr><td colspan="2"> </td></tr>
<tr><td>
<form action="showportal.jsp" method="get">
<table>
<tr>
<td width="200">Portal Selection</td><td>
<select name="portchoice">
<option>news</option>
<option>weather</option>
<option>entertainment</option>
</select>
</td></tr>
<tr><td colspan="2"> </td></tr>
<tr><td colspan="2" align="center">
<input type="submit" value="Select"/>
</td></tr>
</table>
</form>
</td></tr></table>
</body>
</html>
//showportal.jsp
<%@ taglib prefix="c" uri="http://java.sun.ru/jsp/jstl/core" %>
<html>
<c:choose>
<c:when test="${param.portchoice == "news"}">
<jsp:include page="news.jsp" />
</c:when>
<c:when test="${param.portchoice == "weather"}">
<jsp:include page="weather.jsp" />
</c:when>
<c:when test="${param.portchoice == "entertainment"}">
<jsp:include page="entertain.jsp" />
</c:when>
<c:otherwise>
<head><title>System Portal</title></head>
<body>
<h1>Application logic problem detected!</h1>
</c:otherwise>
</c:choose>
</body>
</html>

//news.jsp
<head>
<link rel=stylesheet type="text/css" href="portal.css">
<title>News Portal</title>
</head>
<body>
<table class="mainBox" width="600">
<tr><td class="boxTitle" >
Welcome to the News Portal!
</td></tr>
<tr><td>
<span class="headLine">
<jsp:useBean id="newsfeed" class="com.wrox.begjsp.ch2.NewsFeed" scope="request" >
<jsp:setProperty name="newsfeed" property="topic" value="news"/>
<jsp:getProperty name="newsfeed" property="value"/>
</jsp:useBean>
</span>
<span class="newsText">
<jsp:include page="dummytext.html" />
</span>
</td></tr>
</table>

</source>



== JSP Basics: Generalized Templating and Server Scripting 1 ==



<source lang="java">

/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

</source>



== JSP Basics: Generalized Templating and Server Scripting 2 ==



<source lang="java">
/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

</source>



== JSP Basics: Generalized Templating and Server Scripting 3 ==



<source lang="java">

/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

</source>



== JSP Best Practices and Tools ==



<source lang="java">
/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

</source>



== JSP Directives ==



<source lang="java">
/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

</source>



== JSP Directives: your page ==



<source lang="java">

/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

</source>



== JSP Expression Language ==



<source lang="java">
<%-- <%@page isScriptingEnabled="true" %> --%>
<html>
<head>
<title>Using the JSP Expression Language</title>
</head>
<body>
<h1>The Expression Language</h1>
The value of the name is ${header.userAgent}.

</body>
</html>

</source>



== JSP: expression language 2 ==

== JSP Initialization ==



<source lang="java">
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.ru/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.ru/xml/ns/j2ee http://java.sun.ru/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">
<servlet>
<servlet-name>InitializationJSP</servlet-name>
<jsp-file>/initialization.jsp</jsp-file>
<init-param>
<param-name>testParam</param-name>
<param-value>hello from web.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>InitializationJSP</servlet-name>
<url-pattern>/Initialization</url-pattern>
</servlet-mapping>
</web-app>
//File:initialization.jsp
<html>
<head>
<title>Initialization Parameters and JSP</title>
</head>
<body>
This page has retrieved the following initialization parameter from web.xml:
<br>
<%= pageContext.getServletConfig().getInitParameter("testParam") %>
</body>
</html>

</source>



== JSP in J2EE ==



<source lang="java">
/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

</source>



== JSP Model 2 ==

== JSP Passing Parameters ==

== JSP Performance ==



<source lang="java">
/*
Beginning JavaServer Pages
Vivek Chopra, Jon Eaves, Rupert Jones, Sing Li, John T. Bell
ISBN: 0-7645-7485-X
*/

</source>



== JSP post ==



<source lang="java">
//jspPost.jsp
/*
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<c:set var="mapParams" value="${param}" />
<jsp:useBean id="postBean" class="com.jexp.PostBean" >
<jsp:setProperty name="parameters" value="${mapParams}" />
<jsp:setProperty name="url" value="http://localhost:8080/home/viewPost.jsp" />
</jsp:useBean>
<jsp:getProperty id="postBean" property="post"/>
*/
//viewPost.jsp
/*
<%@page contentType="text/html"%><%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<html>
<head><title>Post Data Viewer</title></head>
<body>
<h2>Here is your posted data</h2>
<c:forEach var="map_entry" items="${param}">
<strong><c:out value="${map_entry.key}" /></strong>:
<c:out value="${map_entry.value}" /><br><br>
</c:forEach>
</body>
</html>
*/
package com.jexp;
import java.util.Map;
import java.util.Iterator;
import java.util.Map.Entry;
import org.apache.rumons.httpclient.HttpClient;
import org.apache.rumons.httpclient.HttpStatus;
import org.apache.rumons.httpclient.methods.PostMethod;
import org.apache.rumons.httpclient.NameValuePair;
import org.apache.rumons.httpclient.HttpException;
public class PostBean implements java.io.Serializable {
private Map parameters;
private String url;
public PostBean(){
}
public void setParameters(Map param){
if (param != null)
parameters = param;
}
public Map getParameters(){
return parameters;
}

public void setUrl(String url){
if (url != null && !(url.equals("")))
this.url=url;
}
public String getUrl(){
return url;
}

public String getPost() throws java.io.IOException,HttpException{
if (url == null || url.equals("") || parameters == null)
throw new IllegalStateException("Invalid url or parameters in PostBean.getPost method.");
String returnData = "";
HttpClient httpClient = new HttpClient();
PostMethod postMethod = new PostMethod(url);
//convert the Map passed into the bean to a NameValuePair[] type
NameValuePair[] postData = getParams(parameters);
//the 2.0 beta1 version has a
//PostMethod.setRequestBody(NameValuePair[])
//method, as addParameters is deprecated
postMethod.addParameters(postData);
httpClient.executeMethod(postMethod);
//A "200 OK" HTTP Status Code
if (postMethod.getStatusCode() == HttpStatus.SC_OK) {
returnData= postMethod.getResponseBodyAsString();
} else {
returnData= "The POST action raised an error: " + postMethod.getStatusLine();
}
//release the connection used by the method
postMethod.releaseConnection();
return returnData;

}//end getPost
private NameValuePair[] getParams(Map map){

NameValuePair[] pairs = new NameValuePair[map.size()];
//Use an Iterator to put name/value pairs from the Map
//into the array
Iterator iter = map.entrySet().iterator();
int i = 0;
while (iter.hasNext()){

Map.Entry me = (Map.Entry) iter.next();
pairs[i] = new NameValuePair(
(String)me.getKey(),((String[]) me.getValue())[0]);
i++;
}
return pairs;
}//end getParams
}

</source>



== JSP Post Data Viewer ==



<source lang="java">
/*
<%@page contentType="text/html"%>
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<jsp:useBean id="userB" class="com.jexp.UserBean" >
<jsp:setProperty name="userB" property="*" />
</jsp:useBean>
<html>
<head><title>Post Data Viewer</title></head>
<body>
<h2>Here is your posted data</h2>
<strong>User name</strong>:
<c:out value="${userB.username}" /><br><br>
<strong>Department</strong>:
<c:out value="${userB.department}" /><br><br>
<strong>Email</strong>:
<c:out value="${userB.email}" />
</body>
</html>
*/
package com.jexp;
public class UserBean implements java.io.Serializable{
String username;
String email;
String department;
public UserBean(){}
public void setUsername(String _username){
if(_username != null && _username.length() > 0)
username = _username;
else
username = "Unknown";
}
public String getUsername(){
if(username != null)
return username;
else
return "Unknown"; }
public void setEmail(String _email){
if(_email != null && _email.length() > 0)
email = _email;
else
email = "Unknown";
}
public String getEmail(){
if(email != null)
return email;
else
return "Unknown";
}
public void setDepartment(String _department){
if(_department != null && _department.length() > 0)
department = _department;
else
department = "Unknown";
}
public String getDepartment(){

if(department != null)
return department;
else
return "Unknown";
}
}

</source>



== JSP without beans ==



<source lang="java">
//createPerson.jsp
<html>
<head><title>Create Person</title></head>
<body>
<h1>Enter your details</h1>
<form action="displayDetails.jsp" method="post">
<table>
<tr><td>First name:</td>
<td><input type="text" name="firstName" /></td>
</tr>
<tr><td>Last name:</td>
<td><input type="text" name="lastName" /></td>
</tr>
<tr><td>Age:</td>
<td><input type="text" name="age" /></td>
</tr>
</table>
<input type="submit" value="Submit details" />
</form>
</body>
</html>
// displayDetails.jsp
<%@ taglib prefix="c" uri="http://java.sun.ru/jstl/core" %>
<html>
<head><title>Display details</title></head>
<body>
<h1>Your details (or, the details you entered!)</h1>
<table>
<tr><td>First name</td><td><c:out value="${param.firstName}" /></td></tr>
<tr><td>Last name</td> <td><c:out value="${param.lastName}" /></td></tr>
<tr><td>Age</td> <td><c:out value="${param.age}" /></td></tr>
</table>
</body>
</html>

</source>



== Multiple Declaration ==



<source lang="java">
<%! int i; %>
<%! void foo(){} %>
<html>
<body>
<%! int j; %>
String here
<%! void bar(){} %>
</body>
</html>

</source>



== Output: Creating a Greeting ==



<source lang="java">
<HTML>
<HEAD>
<TITLE>Creating a Greeting</TITLE>
</HEAD>
<BODY>
<H1>Creating a Greeting</H1>
<%
out.println("Hello from JSP!"); //Display the greeting
%>
</BODY>
</HTML>

</source>



== Passing parameters ==



<source lang="java">
//File: passingPara.jsp
<jsp:forward page="accessingParameters.jsp">
<jsp:param name="myParam" value="John Doe"/>
</jsp:forward>
//accessingParameters.jsp
This page had a parameter forwarded to it:<br>
<%= request.getParameter("myParam") %>

</source>



== pwd -- print working directory ==



<source lang="java">
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.ru/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS""
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun"s Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun"s, and James Gosling"s,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/

<html>
<head>
<title>pwd -- print working directory (aka where r u?)</title>
</head>
</body>
<h1>pwd -- print working directory (aka where r u?)</h1>
<p>This JSP will show where this particular Servlet/JSP engine
will set your ``current directory"" to when runing servlets/JSPs.
In many cases this will be the directory that root/administrator
is in when starting the Web Server.
<%
java.io.File f = new java.io.File(".");
%>
<p>Current directory is <%= f.getCanonicalPath() %>
<p>Listing:
<ul>
<%
String[] list = f.list();
for (int i=0; i<list.length; i++) {
out.print("<li>" + list[i]);
}
%>
</ul>
</body>
</html>

</source>



== Request header display in a JSP ==



<source lang="java">
<%@ taglib uri="http://java.sun.ru/jstl/core" prefix="c" %>
<html>
<head><title>Request header display</title></head>
<body>
<h2>Here are all the Request Headers</h2>
<c:forEach var="reqHead" items="${header}">
<strong><c:out value=
"${reqHead.key}"/></strong>: <c:out value="${reqHead.value}"/><br />

</c:forEach>

</body>
</html>

</source>



== Simple JSP output ==



<source lang="java">
//ch01_01.jsp
<HTML>
<HEAD>
<TITLE>A JSP Example</TITLE>
</HEAD>
<BODY>
<H1>Using JSP</H1>
<% out.println("No worries."); %>
</BODY>
</HTML>

//ch01_02.html
<HTML>
<HEAD>
<TITLE>Reading Text Fields</TITLE>
</HEAD>

<BODY>
<H1>Reading Text Fields</H1>
<FORM ACTION="ch01_03.jsp" METHOD="POST">
Enter your name:
<INPUT TYPE="TEXT" NAME="text1">
<BR>
<INPUT TYPE="SUBMIT" value="Submit">
</FORM>
</BODY>
</HTML>
//ch01_03.jsp
<HTML>
<HEAD>
<TITLE>Reading Data From Text Fields</TITLE>
</HEAD>
<BODY>
<H1>Reading Data From Text Fields</H1>
Your name is
<% out.println(request.getParameter("text1")); %>
</BODY>
</HTML>
//ch01_07.jsp
<HTML>
<HEAD>
<TITLE>Using a Bean</TITLE>
</HEAD>
<BODY>
<H1>Using a Bean</H1>
<% beans.ch01_04 messenger = new beans.ch01_04(); %>
The bean says: <%= messenger.message() %>
</BODY>
</HTML>
//ch01_07.jsp
<HTML>
<HEAD>
<TITLE>Using Bean Properties</TITLE>
</HEAD>
<BODY>
<H1>Using Bean Properties</H1>
<jsp:useBean id="bean1" class="beans.ch01_06" />
The bean says: <jsp:getProperty name="bean1" property="message" />
<BR>
<jsp:setProperty name="bean1" property="message" value="No Problem." />
Now the beans says: <jsp:getProperty name="bean1" property="message" />
</BODY>
</HTML>

</source>



== Simple JSP page to display the random number ==



<source lang="java">
<html>
<HEAD>
<TITLE>HTML Title</TITLE>
</HEAD>
<BODY>

<H3 ALIGN="CENTER">
Ramdom number from 0 to 10 :
<FONT COLOR="RED">
<%= (int) (Math.random() * 10) %>
</FONT>
</H3>
<H4 ALIGN="CENTER">Refresh the page to see if the number changes...</H4>
</BODY>
</HTML>

</source>



== Simplest Jsp page: A Web Page ==



<source lang="java">

<HTML>
<HEAD>
<TITLE>A Web Page</TITLE>
</HEAD>
<BODY>
<% out.println("Hello there!"); %>
</BODY>
</HTML>

</source>



== Welcome page and top level URL ==



<source lang="java">
<html>
<head>
<title>Welcome to jexp</title>
</head>
<body>
Welcome to the welcome page.
<br>You can reach this page by entering the top level URL
<br>for this web application. e.g.
<br>http://www.jexp.ru</body>
</html>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.ru/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.ru/xml/ns/j2ee http://java.sun.ru/xml/ns/j2ee/web-app_2_4.xsd" version="2.4">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

</source>

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в 18:01, 31 мая 2010