.


:

:



,



( , )

:

































 

 

 

 
FAQ

⇐ 34353637383940414243 ⇒



c:import, c:url, c:param, c:redirect.

2) importing by using c:import from jspf

url.jsp imp.jspf, c:url , redirect.jspx.

<!-- # 10: c:redirect, c:param: redirect.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

xmlns:c="http://java.sun.com/jsp/jstl/core"

version="2.0">

<jsp:directive.page contentType=

"text/html; charset=Utf-8" />

<html><head><title> core</title></head>

<body>

<c:redirect url="urldestination.jspx">

<c:param name="fname" value="Ostap"/>

<c:param name="lname" value="Bender"/>

</c:redirect>

</body></html>

</jsp:root>

, urldestination.jspx.

<!-- # 11: ,
: urldestination.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

xmlns:c="http://java.sun.com/jsp/jstl/core"

version="2.0">

<jsp:directive.page contentType=

"text/html; charset=Utf-8"/>

<html><head>

<title> c:url</title>

</head>

<body>

<jsp:text>

<br/>

, c:param:<br/>

</jsp:text>

<c:forEach var="ps" items="${param}">

<c:out value="${ps.key} - ${ps.value}"/><br/>

</c:forEach>

</body></html>

</jsp:root>

:

.
, c:param:
lname - Ostap
fname - Bender

JSTL fmt

.

<%@taglib uri=http://java.sun.com/jstl/fmt prefix=fmt%> JSP;

<jsp:root version=1.2 xmlns:fmt=

http://java.sun.com/jstl/fmt>...</jsp:root> JSP-.

:

<fmt:setLocale/> Locale, ;

<fmt:setBundle/>, <fmt:bundle/> ResourceBundle, . ResourceBundle, , ;

<fmt:message/> .

:

<fmt:timeZone/>, <fmt:setTimeZone/> , ;

<fmt:formatNumber/>, <fmt:formatDate/> / ( ) ;

<fmt:parseNumber/>, <fmt:parseDate/> / Number / Date.

fmt.

formatdatejsp.jspx
Locale.

<!-- # 12: : formatdate.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" xmlns:fmt="http://java.sun.com/jsp/jstl/fmt" version="2.0">

<jsp:directive.page contentType=

"text/html; charset=Utf-8"/>

<html><head><title> </title></head>

<body>

<jsp:useBean id="now" class="java.util.Date" />

<fmt:setLocale value="en-EN"/>

<jsp:text> English</jsp:text><br/>

: <fmt:formatDate value="${now}" /> <br/>

<fmt:setLocale value="ru-RU"/>

<jsp:text> Russian</jsp:text><br/>

: <fmt:formatDate value="${now}" /> <br/>

 

(-short): <fmt:formatDate value="${now}" type="time" timeStyle="short" /> <br/>

(-medium): <fmt:formatDate value="${now}" type="time" timeStyle="medium" /> <br/>

(-long): <fmt:formatDate value="${now}" type="time" timeStyle="long" /> <br/>

(-full): <fmt:formatDate value="${now}" type="time" timeStyle="full" /> <br/>

</body></html>

</jsp:root>

:

English
: Aug 14, 2007
Russian
: 14.08.2007
(-short): 23:23
(-medium): 23:23:02
(-long): 23:23:02 EEST
(-full): 23:23:02 EEST

<!-- # 13: : timezone.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

xmlns:fmt="http://java.sun.com/jsp/jstl/fmt"

version="2.0">

<jsp:directive.page contentType=

"text/html; charset=Utf-8"/>

<html><head><title>timezone</title></head>

<body>

<jsp:useBean id="now" class="java.util.Date" />

<jsp:text>

<br/> fmt:formatDate
TimeZone

</jsp:text><br/>

< fmt:setLocale value="ru-RU"/>

<fmt:timeZone value="GMT+4:00">

<fmt:formatDate value="${now}" type="both"

dateStyle="full" timeStyle="full"/> <br/>

</fmt:timeZone>

</body></html>

</jsp:root>

:


fmt:formatDate TimeZone
15 2007 . 0:26:38 GMT+04:00

formatnumber.jspx
.

<!-- # 14: : formatnumber.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" xmlns:fmt="http://java.sun.com/jsp/jstl/fmt" version="2.0">

<jsp:directive.page contentType=

"text/html; charset=Utf-8"/>

<html><head><title>fomatnumber</title></head>

<body>

9876543.21: <br/>

<jsp:text> - </jsp:text>

<fmt:formatNumber value="9876543.21" /> <br/>

<jsp:text> - </jsp:text>

< fmt:formatNumber value="9876543.21" type="percent"/> <br/>

<fmt:setLocale value="ru-RU"/>

<jsp:text> - </jsp:text>

<fmt:formatNumber value="9876543.21" type="currency"/> <br/>

<fmt:setLocale value="en-EN"/>

<jsp:text> - </jsp:text>

<fmt:formatNumber value="9876543.21" type="currency"/> <br/>

<jsp:text> - </jsp:text>

<fmt:setLocale value="fr-FR"/>

<fmt:formatNumber value="9876543.21" type="currency"/> <br/>

</body></html>

</jsp:root>

:

9876543.21:
- 9 876 543,21
- 987 654 321%
- 9 876 543,21 .
- 9,876,543.21
- 9 876 543,21

JSTL sql

SQL JSP JSP.

<%@taglib uri=http://java.sun.com/jstl/sql prefix=sql%> JSP;

<jsp:root version=1.2 xmlns:sql=

http://java.sun.com/jstl/sql>...</jsp:root> JSP-.

:

<sql:dateParam> <sql:query> <sql:update>;

<sql:param> <sql:query> <sql:update>;

<sql:query> ;

<sql:setDataSource> data source <sql:query>, <sql:update>, <sql:transaction> ;

<sql:transaction> <sql:query> <sql:update> ;

<sql:update> - .

- JSP , MVC.

JSTL xml

XML JSP-.

<% @taglib uri=http://java.sun.com/jstl/xml prefix=x %> JSP-,

<jsp:root version=1.2 xmlns:x=

http://java.sun.com/jstl/xml>...</jsp:root> XML JSP.

:

<x:forEach> - XML- <c:choose>;

<x:choose> - XML- <c:forEach>;

<x:if> - XML- <c:if>;

<x:otherwise> - XML- <c:otherwise>;

<x:out> - XML- <c:out>;

<x:param> - XML- <c:param>, <x:transform>;

<x:parse> - XML-;

<x:set> - XML- <c:set>;

<x:transform> - XML-;

<x:when> - XML- <c:when>;

<x:choose> - XML- <c:choose>;

<x:forEach> - XML- <c:forEach>.

JSP- . include, , , .jspf, JSP. JSP- , , jsp:include. request, session applicatio n , . include, ( JSP ). JSP- jsp:include. , JSP- XML-. , XML JSP-.

<!-- #15: : incl_title.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

xmlns:c="http://java.sun.com/jsp/jstl/core"

version="2.0">

<jsp:directive.page contentType=

"text/html; charset=Utf-8" />

<html><head>

<jsp:directive.include file="\WEB-INF\jspf\title.jspf" />

</head>

<body>

<h1>JSP-, include</h1>

<h3> include , .</h3>

</body></html>

</jsp:root>

<!-- # 16: : title.jspf -->

<title>Title from title.jspf</title>

. request session. . :

http://localhost:8082/home/thanks.jspx?lname=username. , .

<!-- # 17: include : thanks.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0">

<jsp:directive.page contentType="text/html;charset=Utf-8"/>

<html><head><title> include</title></head>

<body>

, jsp-<br/>

session <br/>

<jsp:include page="\WEB-INF\jspf\params.jsp"/>.

</body></html>

</jsp:root>

<!-- #18: : params.jsp -->

<jsp:directive.page contentType="text/html;charset=Utf-8"/>

ID -

<jsp:expression>session.getId()</jsp:expression>

:

, jsp-.
request, session
ID - 08C51EEC60A97E90C734101F54EA310E.

<c:import>. .

web-, , . :

- 404 Not Found. , ;

- 500 Internal Server Error. sendError(500) HttpServletResponse;

- . , web- , JSP.

JSP-, HTML-. error-page web.xml. :

<error-page>

<error-code>404</error-code>

<location>/error404</location>

</error-page>

<error-page>

<exception-type>java.io.IOException</exception-type>

<location>/errorIo</location>

</error-page>

error-code , exception-type .

, , ,

<jsp:directive.page errorPage="path" />, path -. , . java.lang.NullPointerException, error_hand.jsp

<!-- # 19: : gen_error.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

xmlns:c="http://java.sun.com/jsp/jstl/core"

version="2.0">

<jsp:directive.page contentType=

"text/html; charset=Utf-8"/>

<jsp:directive.page errorPage="/error_hand.jspx" />

<html><head><title> </title></head>

<body>

<h2> !</h2>

<form>

<input type="submit" name="gen"

value=" "/>

</form>

<c:if test="${not emptyparam.gen}">

<jsp:declaration>String str;</jsp:declaration>

<jsp:scriptlet>str.length();</jsp:scriptlet>

</c:if>

</body></html>

</jsp:root>

, , , .

<!-- # 20: ERROR PAGE: error_hand.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

version="2.0">

<jsp:directive.page contentType=

"text/html; charset=Utf-8" />

<jsp:directive.page isErrorPage="true" />

<html><head><title> </title></head>

<body>

<p> ! <br/>

<jsp:expression>exception.toString()</jsp:expression>

</p></body></html>

</jsp:root>

JSLT EL , , JSP- param, java.util.Map.Entry, -.

params.jspx , form.jspx.

<!-- # 21: ,
param.jspx: form.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

xmlns:c="http://java.sun.com/jsp/jstl/core"

version="2.0">

<jsp:directive.page contentType=

"text/html; charset=Utf-8" />

<html><head><title> </title></head>

<body>

<form action="params.jspx">

, , : <br/>

: <input type="text" name="fname" value="" /><br/>

: <input type="text" name="lname" value="" /><br/>

E-mail: <input type="text" name="e-mail" value="" /><br/>

<input type="submit" value="" /><br/>

</form>

</body></html>

</jsp:root>

. 19.1.

<!-- # 22: : params.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

xmlns:c="http://java.sun.com/jsp/jstl/core"

version="2.0">

<jsp:directive.page contentType=

"text/html; charset=Utf-8" />

<html><head><title> </title></head>

<body>

JSTL EL<br/>

<c:forEach var="items" items="${param}">

<b><c:out value="${items.key}"></c:out></b>:

<c:out value="${items.value}"></c:out><br/>

</c:forEach>

<c:if test="${not empty param.fname}">

<b>:</b><c:out value="${param.fname}"/><br/>

</c:if>

<c:if test="${not empty param.lname}">

<b>:</b><c:out value="${param.lname}"/>

</c:if>

</body></html>

</jsp:root>

:

JSTL EL
lname:
fname:
e-mail: [email protected]
:

:

c:forEach , . , EL. ${param.lname} lname.

jsp:forward .

<!-- # 23: add_param
form.jspx: forward.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

version="2.0">

<jsp:directive.page contentType=

"text/html; charset=Utf-8" />

<html><head><title> </title></head>

<body>

<jsp:forward page="params.jspx">

<jsp:param name="addparam" value="added"/>

</jsp:forward>

</form>

</body></html>

</jsp:root>

, ( http://localhost:8082/FirstJSP/forward.jspx?name=UserName), , , param.jspx addparam added.

JSP

JSP, . JSP , , - - JSP . .. , . MVC (Model/View/Controller). Model - , View JSP, Controller .

, . :

. 19.2. JSP .

<!-- # 24: : index.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0">

<jsp:directive.page contentType="text/html; charset=Utf-8" />

<html><head><title>Index JSP</title></head>

<body>

<a href="controller">Main Controller</a>

</body></html>

</jsp:root>

login.jsp :

<!-- # 25: : login.jsp -->

<%@ page language="java" contentType="text/html;

charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>

<html><head><title>Login</title></head>

<body><h3>Login</h3>

<hr/>

< form name=" loginForm " method="POST"

action="controller" >

<input type=" hidden " name=" command " value=" login " />

Login:<br/>

<input type="text" name=" login " value=""><br/>

Password:<br/>

<input type="password" name=" password " value=""> <br/>

<input type="submit" value="Enter">

</ form ><hr/>

</body></html>

- Controller:

/* # 26: : Controller.java */

package by.bsu.famcs.jspservlet;

import java.io.IOException;

import javax.servlet.RequestDispatcher;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import by.bsu.famcs.jspservlet.commands.Command;

import by.bsu.famcs.jspservlet.manager.MessageManager;

import by.bsu.famcs.jspservlet.manager.ConfigurationManager;

 

public class Controller extends HttpServlet

implements javax.servlet.Servlet {

//,

RequestHelper requestHelper =

RequestHelper.getInstance();

public Controller() {

super ();

}

protected void doGet(HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException{

processRequest(request, response);

}

protected void doPost(HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException{

processRequest(request, response);

}

private void processRequest(HttpServletRequest

request, HttpServletResponse response)

throws ServletException, IOException {

 

String page = null;

try {

// , JSP

Command command =

requestHelper.getCommand(request);

/* execute() Command
- */

page = command.execute(request, response);

//

} catch (ServletException e) {

e.printStackTrace();

//

request.setAttribute("errorMessage",

MessageManager.getInstance().getProperty(

MessageManager.SERVLET_EXCEPTION_ERROR_MESSAGE));

// JSP- c c

page = ConfigurationManager.getInstance()

.getProperty(ConfigurationManager.ERROR_PAGE_PATH);

} catch (IOException e) {

e.printStackTrace();

request.setAttribute("errorMessage",

MessageManager.getInstance()

.getProperty(MessageManager.IO_EXCEPTION_ERROR_MESSAGE));

 

page = ConfigurationManager.getInstance().getProperty(ConfigurationManager.ERROR_PAGE_PATH);

}

//

RequestDispatcher dispatcher =

getServletContext().getRequestDispatcher(page);

dispatcher.forward(request, response);

}

}

/* # 27: : RequestHelper.java */

package by.bsu.famcs.jspservlet;

import java.util.HashMap;

import javax.servlet.http.HttpServletRequest;

import by.bsu.famcs.jspservlet.commands.Command;

import by.bsu.famcs.jspservlet.commands.LoginCommand;

import by.bsu.famcs.jspservlet.commands.NoCommand;

 

public class RequestHelper {

private static RequestHelper instance = null;

 

HashMap<String, Command> commands =

new HashMap<String, Command>();

 

private RequestHelper() {

//

commands.put("login", new LoginCommand());

}

public Command getCommand(HttpServletRequest request) {

//

String action = request.getParameter("command");

// ,

Command command = commands.get(action);

if (command == null) {

//

command = new NoCommand();

}

return command;

}

// Singleton

public static RequestHelper getInstance() {

if (instance == null) {

instance = new RequestHelper();

}

return instance;

}

}

/* # 28: , : Command.java: LoginCommand.java: NoCommand.java */

package by.bsu.famcs.jspservlet.commands;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.ServletException;

import java.io.IOException;

 

public interface Command {

public String execute(HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException;

}

package by.bsu.famcs.jspservlet.commands;

import java.io.IOException;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import by.bsu.famcs.jspservlet.logic.LoginLogic;

import by.bsu.famcs.jspservlet.manager.ConfigurationManager;

import by.bsu.famcs.jspservlet.manager.MessageManager;

 

public class LoginCommand implements Command {

 

private static final String PARAM_NAME_LOGIN = "login";

private static final String PARAM_NAME_PASSWORD

= "password";

 

public String execute(HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException {

 

String page = null;

//

String login = request.getParameter(PARAM_NAME_LOGIN);

String pass = request.getParameter(PARAM_NAME_PASSWORD);

//

if (LoginLogic.checkLogin(login, pass)) {

request.setAttribute("user", login);

// main.jsp

page = ConfigurationManager.getInstance()

.getProperty(ConfigurationManager.MAIN_PAGE_PATH);

} else {

request.setAttribute("errorMessage",

MessageManager.getInstance()

.getProperty(MessageManager.LOGIN_ERROR_MESSAGE));

page = ConfigurationManager.getInstance()

.getProperty(ConfigurationManager.ERROR_PAGE_PATH);

}

return page;

}

}

package by.bsu.famcs.jspservlet.commands;

import java.io.IOException;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import by.bsu.famcs.jspservlet.manager.ConfigurationManager;

public class NoCommand implements Command {

 

public String execute(HttpServletRequest request,

HttpServletResponse response)

throws ServletException, IOException {

/* */

String page = ConfigurationManager.getInstance()

.getProperty(ConfigurationManager.LOGIN_PAGE_PATH);

return page;

}

}

/* # 29: , properties-
:

ConfigurationManager.java: MessageManager.java */

package by.bsu.famcs.jspservlet.manager;

import java.util.ResourceBundle;

 

public class ConfigurationManager {

private static ConfigurationManager instance;

private ResourceBundle resourceBundle;

 

// config.properties

private static final String BUNDLE_NAME = "config";

 

public static final String DATABASE_DRIVER_NAME =

"DATABASE_DRIVER_NAME";

public static final String DATABASE_URL =

"DATABASE_URL";

public static final String ERROR_PAGE_PATH =

"ERROR_PAGE_PATH";

public static final String LOGIN_PAGE_PATH =

"LOGIN_PAGE_PATH";

public static final String MAIN_PAGE_PATH =

"MAIN_PAGE_PATH";

 

public static ConfigurationManager getInstance() {

if (instance == null) {

instance = new ConfigurationManager();

instance.resourceBundle =

ResourceBundle.getBundle(BUNDLE_NAME);

}

return instance;

}

public String getProperty(String key) {

return (String)resourceBundle.getObject(key);

}

}

package by.bsu.famcs.jspservlet.manager;

import java.util.ResourceBundle;

public class MessageManager {

private static MessageManager instance;

private ResourceBundle resourceBundle;

// messages. properties

private static final String BUNDLE_NAME = "messages";

public static final String LOGIN_ERROR_MESSAGE = "LOGIN_ERROR_MESSAGE";

public static final String SERVLET_EXCEPTION_ERROR_MESSAGE =

"SERVLET_EXCEPTION_ERROR_MESSAGE";

public static final String IO_EXCEPTION_ERROR_MESSAGE = "IO_EXCEPTION_ERROR_MESSAGE";

 

public static MessageManager getInstance() {

if (instance == null) {

instance = new MessageManager();

instance.resourceBundle =

ResourceBundle.getBundle(BUNDLE_NAME);

}

return instance;

}

 

public String getProperty(String key) {

return (String)resourceBundle.getObject(key);

}

}

config.properties:

###############################

## Application configuration ##

###############################

DATABASE_DRIVER_NAME=com.mysql.jdbc.Driver

DATABASE_URL=jdbc:mysql://localhost:3306/db1?user=

root&password=root

ERROR_PAGE_PATH=/jsp/error.jspx

LOGIN_PAGE_PATH=/jsp/login.jspx

MAIN_PAGE_PATH=/jsp/main.jspx

messages.properties:

###############################

## Messages ##

###############################

LOGIN_ERROR_MESSAGE=Incorrect login or password

SERVLET_EXCEPTION_ERROR_MESSAGE=ServletException: Servlet encounters difficulty

IO_EXCEPTION_ERROR_MESSAGE=IOException: input or output error while handling the request

- LoginLogic, :

/* # 30: - : LoginLogic.java */

package by.bsu.famcs.jspservlet.logic;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.DriverManager;

import by.bsu.famcs.jspservlet.manager.ConfigurationManager;

 

public class LoginLogic {

public static boolean checkLogin(

String login, String password) {

//

try {

//

String driver = ConfigurationManager.getInstance().getProperty(ConfigurationManager.DATABASE_DRIVER_NAME);

 

Class.forName(driver);

Connection cn = null;

try {

String url = ConfigurationManager.getInstance()

.getProperty(ConfigurationManager.DATABASE_URL);

cn = DriverManager.getConnection(url);

PreparedStatement st = null;

try {

st = cn.prepareStatement(

"SELECT * FROM USERS WHERE LOGIN =? AND PASSWORD =?");

st.setString(1, login);

st.setString(2, password);

ResultSet rs = null;

try {

rs = st.executeQuery();

/* ,

*/

return rs.next();

} finally {

if (rs!= null)

rs.close();

}

} finally {

if (st!= null)

st.close();

}

} finally {

if (cn!= null)

cn.close();

}

} catch (SQLException e) {

e.printStackTrace();

return false;

} catch (ClassNotFoundException e) {

e.printStackTrace();

return false;

}

}

}

main.jsp :

<!-- # 31: : main.jsp -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

xmlns:c=http://java.sun.com/jsp/jstl/core

version="2.0">

<jsp:directive.page contentType="text/html;

charset=Utf-8" />

<html><head><title>Welcome</title></head>

<body><h3>Welcome</h3>

<hr />

<c:out value="${ user }, Hello!"/>

<hr />

<a href="controller">Return to login page</a>

</body></html>

</jsp:root>

error.jsp (, ):

<!-- # 32: , : error.jspx -->

<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page"

xmlns:c=

"http://java.sun.com/jsp/jstl/core" version="2.0">

<jsp:directive.page contentType=

"text/html; charset=Utf-8" />

<html><head><title>Error</title></head>

<body>

<h3>Error</h3>

<hr />

<jsp:expression>

(request.getAttribute("errorMessage")!= null)

? (String) request.getAttribute("errorMessage")

: "unknown error"</jsp:expression>

<hr />

<a href="controller">Return to login page</a>

</body></html>

</jsp:root>

, , web.xml, - controller, .. mapping.

<!-- # 33: : web.xml -->

<?xml version="1.0" encoding="UTF-8"?>

<web-app id="WebApp_ID" version="2.4" >

<display-name>Project</display-name>

<servlet>

<description>

</description>

<display-name>

Controller</display-name>

<servlet-name>Controller</servlet-name>

<servlet-class>

by.bsu.famcs.jspservlet.Controller</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>Controller</servlet-name>

<url-pattern>/controller</url-pattern>

</servlet-mapping>

<welcome-file-list>

<welcome-file>index.jsp</welcome-file>

</welcome-file-list>

</web-app>

<servlet-name>
controller, <url-pattern> /controller.

Web- Tomcat 5.5.*, :

http://localhost:8082/Project/index.jspx

:

http://localhost:8082/Project/controller

19

, JSP . .

d) . : , , , . . JSP c .

e) . : , , , , , . ID, . ID. JSP. .

f) . , , . . JSP.

g) . . . .

h) . . JSP. . .

i) . , . . , . .

j) . . . .

B

4 , JSP , .

19

19.1.

j int JSP?

1) <%! int j = 1 %>;

2) <%@ int j = 2 %>;

3) <%! int j = 3; %>;

4) <%= int j = 4 %>;

5) <%= int j = 5; %>.

19.2.

JSP ?

1) error;

2) page;

3) this;

4) exception;

5) context.

19.3.

_jspService()?

1) javax.servlet.jsp.Jsp;

2) javax.servlet.jsp.JspServlet;

3) javax.servlet.jsp.JspPage;

4) javax.servlet.jsp.HttpJspPage;

5) javax.servlet.jsp.HttpJspServlet.

19.4.

jsp:useBean

<jsp:useBean id="appJsp"

class="main.ApplicationJSP"

scope="application" />

?

1) ServletConfig;

2) HttpApplication;

3) ServletContext;

4) ServletConfig;

5) ApplicationContext.

19.5.

JSP JavaBean ?

1) jsp:useBean.toString;

2) jsp:param.property;

3) jsp:propertyType;

4) jsp:getProperty;

5) jsp:propertyToString;

 
20

JDBC

,

JDBC (Java DataBase Connectivity) (API) Java . JDBC, . JDBC :

1. , , ODBC ( JDBC-ODBC ). sun.jdbc.odbc.JdbcOdbcDriver JDK.

2. , (native) (.. ).

3. , Java-, , , .

4. , native-.

, , , . , , . , , , .. , JDBC, ODBC.

. 20.1. JDBC-ODBC-

JDBC , . JDBC SQL- (), , .

, JDBC J2EE, Web-, .

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