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Apache Tomcat Realm Configuration

landril — Wed, 11 Mar 2009 02:33:00 GMT

参照�Q?http://tomcat.apache.org/tomcat-6.0-doc/realm-howto.html

landril 2009-03-11 10:33 发表评论

Apache Tomcat Configuration Reference--The Context Container

landril — Tue, 10 Mar 2009 08:36:00 GMT

参照�Q?http://tomcat.apache.org/tomcat-5.5-doc/config/context.html

landril 2009-03-10 16:36 发表评论

Apache Tomcat Share Library and Class Loader

landril — Tue, 10 Mar 2009 08:22:00 GMT

参照文档�Q?http://tomcat.apache.org/tomcat-6.0-doc/class-loader-howto.html

landril 2009-03-10 16:22 发表评论

有用的网址记录

landril — Tue, 10 Mar 2009 08:09:00 GMT

http://java.sun.com/products/jsp/download.html - JavaServer Pages (JSP) Specfication, Version 2.0.
http://java.sun.com/products/servlet/download.html - Servlet API Specification, Version 2.4.
http://www.cvshome.org. - CVS
http://tomcat.apache.org/tomcat-6.0-doc/class-loader-howto.html - Apache Tomcat 6.0 Class Loader HOW-TO

landril 2009-03-10 16:09 发表评论

landril — Wed, 11 Jun 2008 10:08:00 GMT

我有下面一�D늨�序：
1.jsp�?

2.jsp中只做一些java处理�Q�没有html之类的东西输出，而处理后的��D��回iframe�Q�但我现在点��L��钮后�Q�弹出新的空白窗�?.jsp�?nbsp;
请高手指教如何修改，使得点击按钮后在iframe内显�C?.jsp�Q�而不会弹出新的空白窗�?.jsp�?/p>

另外我通过��试发现�Q�在IE6,IE7,NETSCAPE7.1�q�几个浏览器中，都实��C��我所希望的功能（点击按钮后，��D��回到iframe,但不弹出新的�I�白�H�口2.jsp�Q�，可是NETSCAPE7.02却不行，不知道是��Z��么�?/p>

请高手指教，先谢谢各位了�?/p>

landril 2008-06-11 18:08 发表评论

tomcat5.5.17+jstl1.2+servlet2.5+jsp2.1配置

landril — Fri, 06 Jul 2007 05:35:00 GMT

tomcat5.5.17+jstl1.2+servlet2.5+jsp2.1配置

在此我��用的环境是：
tomcat5.5.17
jstl1.2
servlet2.5
jsp2.1

我以一个简单的例子hello1来说明吧�Q�发布工�E�时最重要的就是目录结构了�Q�hello1是根目录�Q�放在tomcat中的webapps里，先看看目录结构：
hello1\index.jsp
hello1\response.jsp
hello1\WEB-INF\lib\javaee.jar
hello1\WEB-INF\lib\jsf-api.jar
hello1\WEB-INF\lib\jsf-impl.jar
hello1\WEB-INF\lib\jstl-1.2.jar
hello1\WEB-INF\web.xml

如果你按照以上目录发布工�E�，抛出以下异常�Q?br>(1) java.lang.NoClassDefFoundError: javax/el/ExpressionFactory
(2) 或打开��面后显�C�：

HTTP Status 404 - /hello1/

type Status report

message /hello1/

description The requested resource (/hello1/) is not available.

Apache Tomcat/5.5.17

则将javaee.jar包再copy一份放在tomcat目录的common\lib下就不会了�?br>关于用到的javaee.jar、jsf-api.jar、jsf-impl.jar、jstl-1.2.jar�q�四个包可以通过myeclipse中获得，如果你安装了myeclipse5.5的话�Q�我安装的是MyEclipse 5.5.1 GA�Q�这四个包的所在的目录是：MyEclipse 5.5.1 GA\eclipse\plugins\com.genuitec.eclipse.j2eedt.core_5.5.1\data\libraryset\EE_5\

到此�Q�再�l�出具体的文件代码吧�?br>(1) hello1\index.jsp

<%@ taglib uri="
<%@ taglib uri="

Hello

Hello, my name is Duke. What's yours?

<%@include file="response.jsp" %>

(2) hello1\response.jsp

Hello, ${param.username}!

(3) hello1\WEB-INF\web.xml

xsi:schemaLocation="http://java.sun.com/xml/ns/javaee web-app_2_5.xsd"
version="2.5">

  hello1
  *.jsp
  false
  false
  false

成功之后��面昄��为：

Hello, my name is Duke. What's yours?

Hello, afdfadsfads!

landril 2007-07-06 13:35 发表评论

landril — Fri, 18 May 2007 04:27:00 GMT

敏捷软�g开发有�?/p>

1.个体和交互胜�q�过�E�和工具
一个优�U�的团队成员未必是一个技术一��的�E�序员，可能是技术一般的�E�序员，但他能很好的与他人合作，沟通，合作�Q�良好的沟通以及交互能力比单纯的编�E�更重要�?br>2.可以工作的��Y件胜�q�面面俱到的文档
一个可以工作的软�g需要具有文档，用文档可以传辄��l�的原理及结构，以及对系�l�及设计决策�q�行描述。但�q�多的文档也�q�不是一件好事，首先�~�制需要花大量的时��_��保持各文档同步，文档与代码之间的同步更是一仉��事，如果没有做到同步�Q�那么会形成误导�Q�后果将更严重�?br> 对于团队来说�Q�需要编写和�l�护一份描�q�系�l�原理及�l�构的文档，描述�pȝ��原理�Q�结构和设计原理。关于培训新员工�Q�则��其与业务及软�g均熟悉的老员工坐在一��P��实时指导�Q��ƈ�l�合代码�?br>3.客户合作胜过合同谈判
与客��L��密的�l�合在一��P��短周期的向客��h��C��Y件的�q�行情况。得到客��L��反馈�q�及时跟�q�进行更攏V�?br>4.响应变化胜过遵��@计划
做短旉��的详�l�计划，长时间的�_�略计划�Q�时间越长计划越�_�略

短周期，持箋的交付能工作软�g�l�客��P��得到客户的反馈�?br> 以�h为本�Q�给成员自信�Q�激励成员来沟徏��目�Q�信��L��个�h都成完成�?br> 以能够满��_��户需求的数量来度量��Y件的�q�度�?br> 使团队成员保持高度集中的�_�֊��Q�饱满的�_��Q�不要�ؓ了多做一点工作而借用明于的精力�?br> 最好的架构�Q�需求，设计��于团队�?br> 每隔一�D�|��_��团队�Ҏ��有效的工作进行反省，对组�l�方式，规则�Q�关�pȝ��q�行调整�Q�达到更有效的工作方�?br>

极限�~�程

1.客户做�ؓ团队开发�h员，客户可以是和开发团队同一家公司的一�l�业务分析师或市��Z��Ӟ��可以是用户团体委�z��用户代表�?br>2.每两周交付一�ơ可以工作的软�g�Q��P代计划（两周做一�ơ，重复周期�Q�，发布计划�Q�一�ơ做大概三个月的发布计划�Q�做一�ơ长周期的交付�?br>3.验收��试
4.�l�对�~�程�Q�两个�h使用一台电脑，一个控刉��盘，一个检查代码的错误及可以改�q�的地方�Q�结对的关系每天改变一�ơ，每个团队成员应该和其他所有团队成在一起工作过�Q�这栯��够促�q�业务知识及技术知识在团队中的快速传播，且能大大减少�~�陷率�?br>5.��试驱动的开发，�~�写所有��品代码的目的都是��Z��使测试通过�Q�测试用例和代码一��h��化，基本是几分钟一�ơ。结果，一个非常完整的��试用例集就和代码一��L��成�v来�?br>6.每个�l�对都有对�Q何一个模块的��出（check out�Q�权�Q�及修改权力�Q�没有程序员�Ҏ��一个特定的模块单独负责�?br>7.团队人员保持�E�_��适中的开发速度�Q�不允许加班�?br>8.开攄��工作�I�间�Q�积极讨论的工作环境。生产率会成倍的提高�?br>9.��单的设计开发，考虑能够工作的最��单的方式�Q�如能够能页面完成的��׃��能EJB�Q�不用数据库。不能出现重复的代码�Q�一�ơ就够�?br>10.团队�l�常性地对代码进行重构�?nbsp;

landril 2007-05-18 12:27 发表评论

landril — Fri, 04 May 2007 06:58:00 GMT

我用的是windows 2003的系�l�，oracle9i�Q�启动以下这两个服务后会自动停止�Q?br>OracleOraHome90Agent
OracleOraHome90TNSListener

日志昄��Q?br>
OracleOraHome90Agent�Q?br>
-------------- [OracleOraHome90Agent] ------------
Sending initial service status..
Commandline is "E:\oracle\ora90\bin\dbsnmpwd.bat" -agent_name OracleOraHome90Agent
2. WAIT_OBJECT_0: Agent exited with retCode 0.
Agent failed to startup.
Check E:\oracle\ora90\network\log\OracleOraHome90Agent.nohup for details

OracleOraHome90TNSListener�Q?br>
TNSLSNR for 32-bit Windows: Version 9.0.1.1.1 - Production on 04-5�?-2007 14:50:30

�pȝ��参数文�g为E:\oracle\ora90\network\admin\listener.ora
写入E:\oracle\ora90\network\log\listener.log的日志信�?br>写入E:\oracle\ora90\network\trace\listener.trc的跟�t�信�?br>跟踪�U�别当前�?

�?pid=4092 开�?br>监听�Q?DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC0ipc)))
监听该对象时出错: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ygogo98sla5i4oh)(PORT=1521)))
TNS-12545: 因目标主机或对象不存在，�q�接��p�|
TNS-12560: TNS: 协议适配器错�?br> TNS-00515: 因目标主机或对象不存在，�q�接��p�|
32-bit Windows Error: 1004: Unknown error
不再监听: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC0ipc)))

原因是我安装了oracle之后�Q�又修改了主机名
解决�Ҏ��Q?br>
一、直接修�?listener.ora
路径是： oracle安装目录\ora90\network\ADMIN\listener.ora
修改HOST ��Z��机名或者IP

二、通过 Net Manager�Q�在监听�E�序\LISTENER 下直接修改主机即�?

landril 2007-05-04 14:58 发表评论

landril — Sat, 28 Apr 2007 13:33:00 GMT

会话跟踪技�?/span>--session的��?/span>

会话跟踪�Q?/span>

1�?nbsp;使用隐藏表单字段

2�?nbsp;URL重写

http://host/path/file.jsp?sessionid=landril

3�?nbsp;持久Cookie

4�?nbsp;会话HttpSession

一�?/span>使用session的简单步�?/span>

获取HttpSession�Q?/span>request.getSession()�Ҏ��Q�对象，查找与该会话相关的信息（session.getAttribute()�Q�，存储会话中的信息�Q?/span>session.setAttribute()�Q�，删除会话中的数据�Q?/span>session.removeAttribute()�Q�，删除当前会话�Q?/span>session.invalidate()�Q?/span>

�?/span>session中，可以存储��L��数量的键值对�Q�通过键即可获取相应的��|��即��用：session.getAttribute(“key”);�?/span>

二�?/span>session的常用方�?/span>

1�?nbsp;getAttribute()�Q�从session中获取以前存储的�?/span>

2�?nbsp;getAttributeNames()�Q�返�?/span>session中所有属性的名称

3�?nbsp;setAttribute()�Q�将键与值关联�v来，存储�q?/span>session

4�?nbsp;removeAttribute()�Q�删�?/span>session中存储的对应键的�?/span>

5�?nbsp;invalidate()�Q�删除整�?/span>session及其存储的键�?/span>

6�?nbsp;logout()�Q�注销当前用户

7�?nbsp;getId()�Q�获取每�?/span>session对应的唯一ID

8�?nbsp;getCreationTime()�Q�获�?/span>session创徏的时�?/span>

9�?nbsp;getLastAccessedTime()�Q�获�?/span>session最后被讉K��的时�?/span>

10�?span> getMaxInactiveInterval()�Q�在用户没有讉K��的情况下�Q�会话在被自动废弃之前应该保持多长时�?/span>

三�?/span>使用session的一个例子，拥有购物车的在线商店

1�?/span>CatalogPage.java

package com.landril.session;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class CatalogPage extends HttpServlet {

private CatalogItem[] items;

private String[] itemIds;

private String title;

protected void setItems(String[] itemIds) {

this.itemIds = itemIds;

items = new CatalogItem[itemIds.length];

for (int i = 0; i < items.length; i++) {

items[i] = Catalog.getItem(itemIds[i]);

}

protected void setTitle(String title) {

this.title = title;

}

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

if(items == null){

response.sendError(response.SC_NOT_FOUND,"Missing Items:");

return;

}

response.setContentType("text/html");

PrintWriter out = response.getWriter();

out.println(""+title+"

"+title+"

");

CatalogItem item;

for (int i = 0; i < items.length; i++) {

out.println("

");

item = items[i];

if(item == null)

out.println("Unknow itemId: "+itemIds[i]);

else{

out.println();

String formURL = request.getContextPath()+"/orderPage";

formURL = response.encodeURL(formURL);

out.println("

}

2�?/span>ComputerBook.java

package com.landril.session;

public class ComputerBook extends CatalogPage{

public void init(){

String[] ids = {"book1","book2","book3","book4"};

setItems(ids);

setTitle("Japanese Book");

}

3�?/span>JapaneseBook.java

package com.landril.session;

public class JapaneseBook extends CatalogPage{

public void init(){

String[] ids = {"book5","book6"};

setItems(ids);

setTitle("Computer Book");

}

4�?/span>OrderPage.java

package com.landril.session;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.List;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

public class OrderPage extends HttpServlet {

public void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

HttpSession session = request.getSession();

ShoppingCart cart;

synchronized(session){

cart = (ShoppingCart)session.getAttribute("shop");

if(cart == null){

cart = new ShoppingCart();

session.setAttribute("shop", cart);

}

String itemId = request.getParameter("itemId");

if(itemId != null){

String num = request.getParameter("num");

if(num == null)

cart.addItem(itemId);

else{

int numItems;

try {

numItems = Integer.parseInt(num);

} catch (NumberFormatException e) {

numItems = 1;

}

cart.setNum(itemId, numItems);

}

response.setContentType("text/html");

PrintWriter out = response.getWriter();

String title = "Your Order";

out.println(""+title+"

"+title+"

");

synchronized(session){

List itemOrders = cart.getItemOrders();

if(itemOrders.size() == 0)

out.println("No items");

else{

out.println("

Item ID	Short Description	Long Description	Unit Price	Number	Total Price"); ItemOrder order; for (int i = 0; i < itemOrders.size(); i++) { order = (ItemOrder)itemOrders.get(i); out.println("
"+order.getItemId()+"	"+order.getSDesc()+"	"+order.getLDesc()+"	"+order.getUnitPrice()+"	"); out.println(" "); out.println(""); out.println("	"); out.println(order.getTotalPrice()); } String checkURL = response.encodeURL(request.getContextPath()+"/check.html"); out.println("

Item ID

Short Description

Long Description

Unit Price

Number

Total Price");

ItemOrder order;

for (int i = 0; i < itemOrders.size(); i++) {

order = (ItemOrder)itemOrders.get(i);

out.println("

"+order.getItemId()+"

"+order.getSDesc()+"

"+order.getLDesc()+"

"+order.getUnitPrice()+"

");

out.println("

");

out.println(order.getTotalPrice());

}

String checkURL = response.encodeURL(request.getContextPath()+"/check.html");

out.println("

}

5�?/span>ShoppingCart.java

package com.landril.session;

import java.util.ArrayList;

import java.util.List;

public class ShoppingCart {

private List<ItemOrder> itemOrders;

public ShoppingCart() {

itemOrders = new ArrayList<ItemOrder>();

}

public List<ItemOrder> getItemOrders(){

return itemOrders;

}

public synchronized void addItem(String itemId){

ItemOrder order;

for(int i=0;i<itemOrders.size();i++){

order = (ItemOrder)itemOrders.get(i);

if(itemId.equals(order.getItemId())){

order.addNum();

return;

}

ItemOrder newOrd = new ItemOrder(Catalog.getItem(itemId));

itemOrders.add(newOrd);

}

public synchronized void setNum(String itemId,int num){

ItemOrder order;

for (int i = 0; i < itemOrders.size(); i++) {

order = (ItemOrder)itemOrders.get(i);

if(itemId.equals(order.getItemId())){

if(num <=0)

itemOrders.remove(i);

else

order.setNum(num);

}

return;

}

ItemOrder newOrd = new ItemOrder(Catalog.getItem(itemId));

itemOrders.add(newOrd);

}

6�?/span>CatalogItem.java

package com.landril.session;

public class CatalogItem {

private String itemId;

private String sDesc;

private String lDesc;

private float price;

public String getItemId() {

return itemId;

}

public void setItemId(String itemId) {

this.itemId = itemId;

}

public String getLDesc() {

return lDesc;

}

public void setLDesc(String desc) {

lDesc = desc;

}

public float getPrice() {

return price;

}

public void setPrice(float price) {

this.price = price;

}

public String getSDesc() {

return sDesc;

}

public void setSDesc(String desc) {

sDesc = desc;

}

public CatalogItem(String itemId, String desc, String desc2, float price) {

super();

this.itemId = itemId;

sDesc = desc;

lDesc = desc2;

this.price = price;

}

7�?/span>ItemOrder.java

package com.landril.session;

public class ItemOrder {

private CatalogItem item;

private int num;

public ItemOrder(CatalogItem item) {

setItem(item);

setNum(1);

}

public CatalogItem getItem() {

return item;

}

public void setItem(CatalogItem item) {

this.item = item;

}

public int getNum() {

return num;

}

public void setNum(int num) {

this.num = num;

}

public String getItemId() {

return item.getItemId();

}

public String getSDesc() {

return item.getSDesc();

}

public String getLDesc() {

return item.getLDesc();

}

public float getUnitPrice() {

return item.getPrice();

}

public void addNum() {

setNum(num + 1);

}

public void cancelOrder() {

setNum(0);

}

public float getTotalPrice() {

return num * getUnitPrice();

}

8�?/span>Catalog.java

package com.landril.session;

public class Catalog {

private static CatalogItem[] items = {

new CatalogItem("book1", "Hibernate", "Hibernate�Q?/span>Hibernate", 57),

new CatalogItem("book2", "Spring", "Spring�Q?/span>Spring", 36),

new CatalogItem("book3", "Tomcat", "Tomcat�Q?/span>Tomcat", 23),

new CatalogItem("book4", "Jboss", "Jboss�Q?/span>Jboss", 35),

new CatalogItem("book5", "Japanese1", "Japanese1�Q?/span>Japanese1", 35),

new CatalogItem("book6", "Japanese2", "Japanese2�Q?/span>Japanese2", 23) };

public static CatalogItem getItem(String itemId) {

CatalogItem item;

if (itemId == null)

return null;

for (int i = 0; i < items.length; i++) {

item = items[i];

if (itemId.equals(item.getItemId()))

return item;

}

return null;

}

9�?/span>check.html

<html>

<head>

<title>checking outtitle>

head>

<body>

Checking out

body>

landril 2007-04-28 21:33 发表评论

Servlet基础知识及常用类

landril — Sat, 28 Apr 2007 13:32:00 GMT

Servlet基础知识及常用类

一�?/span>Servlet生命周期

服务器加�?/span>Servlet�Q�创�?/span>Servlet�cȝ��实例�Q�调�?/span>Servlet�?/span>init()�Ҏ��Q�处理客��L��的服务调用（如果收到��h��Q�调�?/span>service()�Ҏ��Q?/span>service()�Ҏ��处理��h��q�将�l�果�q�回客户端，�{�待下一下请求，重复�Q�，Servlet在服务器调用destroy()�Ҏ��后被卸蝲

二�?/span>会话跟踪技�?/span>

1�?nbsp;使用隐藏表单字段

2�?nbsp;URL重写

http://host/path/file.jsp?sessionid=landril

3�?nbsp;持久Cookie

4�?nbsp;会话HttpSession

ServletRequest�Q�用于将��h��的信息传送给Servlet

ServletResponse�Q�提供服务器对客��L��h��的响�?/span>

RequestDispatcher�Q�接收用��L��的请求�ƈ��其发送到��M��资源�Q?/span>RequestDispatcher对象用作资源的封装器�Q�通过路径或名�U�指�?/span>

ServletConfig�Q�定�?/span>Servlet配置对象�Q�可以从web.xml文�g中获取初始化参数的��g��及对ServletContext对象的引�?/span>

ServletContext�Q�让Servlet查找有关Servlet引擎及其环境的信�?/span>

landril 2007-04-28 21:32 发表评论