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Struts2 入门

all gone — Mon, 08 Jan 2007 13:59:00 GMT

摘要: 很久没有看Java相关的东西了�Q�这几天才发现Struts2 已经发布了，以前��听说Struts2��是以前的Webwork2�Q�只是作了少许的改动而已�Q�我以前也没看过Webwork�Q�所以赶紧下来试了一把。Struts2的地址�Q�http://struts.apache.org/2.x在Eclipse中新��Z��一个Tomcat工程�Q�如果用WTP插�g的话Dynamic Web工程�Q�struts2Test�Q�以�?.. 阅读全文

all gone 2007-01-08 21:59 发表评论

EJB3.0 + Struts��试

all gone — Fri, 11 Aug 2006 05:52:00 GMT

摘要: 一直想做一�?EJB3.0 �l�合 Struts 的例子，前天刚好从网上找��C��一个相关的 Tutorial �Q�于是小试了一把，虽然只是完成�?Tutorial 上的一��点功能�Q�但是感觉还是有必要写下来，免得以后�q�要再去看别人的Tutorial �? 开发环境： Eclipse3.2 + WTP1.5 �Q?JBoss 4.0.3SP1 �Q?jboss-EJB-3.0_RC... 阅读全文

all gone 2006-08-11 13:52 发表评论

SSH(Spring + Struts + Hibernate)��试之三

all gone — Tue, 18 Jul 2006 08:41:00 GMT

SSH(Spring + Struts + Hibernate)��试之三

前面通过PlugIn我们实现了Spring Context的加载，不过仅仅加蝲Context�q�没有什么实�?
意义�Q�我们还需要修攚w��|�，��Struts Action交给Spring容器�q�行��理。下面将通过一个Regsit
实例加以说明�?

首先准备好regist.jsp和login.jsp,在regist.jsp�?的form有name,password,password2,email域�?

在struts-config.xml中添加配�|�：

type="org.springframework.web.struts.DelegatingActionProxy"

validate="true" input="/regist.jsp" scope="request">

RegistForm,RegistAction按照原来Struts的方法去�?我在RegistAction中加入了一个UserDAO对象
userDAO�Q�这个对象由Spring注入�?

singleton="false">

基本上SSH的架构已�l�完成，�l�确认后可以自己��试一下了。（完）

all gone 2006-07-18 16:41 发表评论

SSH(Spring + Struts + Hibernate)��试之二

all gone — Tue, 18 Jul 2006 08:09:00 GMT

Spring和Struts�l�合有几�U�方法，我选了最常用的PlugIn方式�Q�在struts-config.xml中加�?br />

value="/WEB-INF/action-servlet.xml" />

WEB-INF目录下的action-servlet.xml��是Spring的配�|�文�?下面�l�出的是整个�?/font>action-servlet.xml文�g�Q?/font>

//Data Source

   class="org.springframework.jdbc.datasource.DriverManagerDataSource">

   com.mysql.jdbc.Driver


   jdbc:mysql://localhost:3306/forum


   test

// For Hibernate
   class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">





    com/lzy/forum/domain/User.hbm.xml
    com/lzy/forum/domain/Article.hbm.xml
    com/lzy/forum/domain/Board.hbm.xml





     org.hibernate.dialect.MySQLDialect

    true

   class="org.springframework.orm.hibernate3.HibernateTransactionManager">

// For DAO
   class="com.lzy.forum.dao.impl.UserDAOHibernate">

   class="com.lzy.forum.dao.impl.BoardDAOHibernate">

   class="com.lzy.forum.dao.impl.ArticleDAOHibernate">

//For Struts Action

   singleton="false">

   class="com.lzy.forum.action.BoardManageAction" singleton="false">

   class="com.lzy.forum.action.BoardNavigateAction" singleton="false">

   class="com.lzy.forum.action.BoardDisplayAction" singleton="false">

   class="com.lzy.forum.action.ArticleManageAction" singleton="false">

�l�过�q�样的配�|�之后，Hibernate事务交由Spring��理�Q�sessionFactory从Spring容器获得。下面通过其中的一个DAO实例来看看这样做带来的方�ѝ�?br />

//BoardDAO.java

package com.lzy.forum.dao;

import java.util.ArrayList;

import com.lzy.forum.domain.Board;

public interface BoardDAO {

public boolean isBoardExist(String name);

public void addBoard(Board board);

public void deleteBoard(Board board);

public Board loadBoard(int id);

public Board loadBoard(String name);

public Board loadBoardWithArticles(int id);

public ArrayList getRootBoardsList();

}

//BoardDAOHibernate.java

package com.lzy.forum.dao.impl;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.ListIterator;
import java.util.Set;

import org.hibernate.Hibernate;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.lzy.forum.dao.BoardDAO;
import com.lzy.forum.domain.Board;

public class BoardDAOHibernate extends HibernateDaoSupport implements BoardDAO {

public void deleteBoard(Board board) {
// TODO Auto-generated method stub
this.getHibernateTemplate().delete(board);
}

public void addBoard(Board board) {
// TODO Auto-generated method stub
this.getHibernateTemplate().saveOrUpdate(board);

}

public boolean isBoardExist(String name) {
  // TODO Auto-generated method stub
  ArrayList list = (ArrayList) this.getHibernateTemplate().find(
    "from Board where name = ? ", new Object[] { name });
  if (list.size() > 0) {
   // System.out.println("find it");
   return true;
  }
  return false;
}

public Board loadBoard(int id) {
  // TODO Auto-generated method stub
  ArrayList list = (ArrayList) this.getHibernateTemplate().find(
    "from Board where id = ? ", new Object[] { id });

  Board b = null;
  if (list.size() > 0) {
   b = (Board) list.get(0);
  }

return b;
}

public Board loadBoard(String name) {
  // TODO Auto-generated method stub
  ArrayList list = (ArrayList) this.getHibernateTemplate().find(
    "from Board where name = ? ", new Object[] { name });

  Board b = null;
  if (list.size() > 0) {
   b = (Board) list.get(0);
  }

return b;
}

public ArrayList getRootBoardsList() {
  // TODO Auto-generated method stub
  ArrayList list = (ArrayList) this.getHibernateTemplate().find(
    "from Board b left join fetch b.ChildBoards where b.Parent = null order by b.id");
  System.out.println(list.size() + " root boards found ");

ListIterator index = list.listIterator();
while (index.hasNext()) {

   Board s = (Board) index.next();
   //this.getSession(true);
   //Hibernate.initialize(s.getChildBoards());
   ///*
    Set children = (Set) s.getChildBoards();
    Iterator it = children.iterator();

    while(it.hasNext()){
    Board b = (Board)it.next();
    //Hibernate.initialize(b);
    System.out.println(b.getName());
    }
    //*/

   //System.out.println(children.size() + "child(ren) found ");
   //s.setChildBoards(s.getChildBoards());
  }

return list;
}

public Board loadBoardWithArticles(int id) {
  // TODO Auto-generated method stub
  ArrayList list = (ArrayList) this.getHibernateTemplate().find(
    "from Board b left join fetch b.Articles where b.Id = ? ", new Object[] { id });

  Board b = null;
  if (list.size() > 0) {
   b = (Board) list.get(0);
  }

return b;

}

}

BoardDAOHibernate�l�承 HibernateDaoSupport后，通过getHibernateTemplate()得到一个HibernateTemplate实例�Q�然后执行CRUD操作�Q�非常简单。需要注意的是，�׃��执行一�ơCRUD操作后，Hibernate session关闭�Q�如果有使用延迟加蝲�{�略的对象没有加载，在后面的Web层很�Ҏ��出现如下错误�Q?br />failed to lazily initialize a collection of role
从网上搜到的解决�Ҏ��是Open Session In View�Q?br />
     hibernateFilter
     org.springframework.orm.hibernate3.support.OpenSessionInViewFilter

       singleSession
       true

     hibernateFilter
     *.do

我试了试�Q�还是有一些问题，所以后来还是放弃了�q�种�Ҏ��Q�所有在Web层中需要的对象都必��d��Business层中加蝲完成。如下面的代码所�C�：

ArrayList list = (ArrayList) this.getHibernateTemplate().find(
    "from Board b left join fetch b.Articles where b.Id = ? ", new Object[] { id });

�q�样Hibernate和Spring的结合也��完成了。其他的一些DAO�c�d��实现代码我没有给出，但是大同��异�Q�和Board的实现类伹{�?br />

最后将是Struts 和Spring的结合，��在下一��给出。（未完待箋�Q?/font>

all gone 2006-07-18 16:09 发表评论

SSH(Spring + Struts + Hibernate)��试之一

all gone — Tue, 18 Jul 2006 01:54:00 GMT

之前对Spring Struts Hibernate都稍有了解，Spring的IOC�l�我留下了很��q��印象�Q�容器管理的对象生成
�Ҏ��极大地简化了�E�序逻辑�Q�Spring也提供了用于Web的Spring MVC 框架�Q�由于我感觉其易用性还是不�?br />Struts�Q�所以我�q�是选择Struts作�ؓ前端WEB框架�Q�Hibernate我一直没有在Web应用中试�q�，�q�次当然不会
错过��Z��了�?/font>

开发环境的塔徏我就不多说了�Q�具体可以参考我以前的几��日志�?/p>

在Eclipse中新��Z��个动态Web工程�Q�将Struts 、Spring、Hibernate需要的jar都添加到WEB-INF/lib目录下，
��Struts标签所需的tld文�g、struts-config.xml文�g�Q�可以由StrutsIDE生成�Q�添加到WEB-INF下，另外�?br />此目录下��d��一个Spring的配�|�文件applicationContext.xml�?/p>

我参考的例子是夏昕的《深入浅出Hibernate》上的第6章，很好的一个论坛示例�?/p>

首先按照书上的ER模型�Q�在数据库（MySQL�Q�中建立相应的数据库�?/p>

create database forum;

use forum;

create table user(
id int not null auto_increment primary key,
name varchar(50),
pwd varchar(50),
email varchar(50)

)type=innodb;

create table board(
id int not null auto_increment primary key,
parent_id int,
create_by int not null,
name varchar(50) not null,
remark varchar(255),
create_time datetime,

index(parent_id),
index(create_by),

foreign key(parent_id) references board(id) on delete cascade,
foreign key(create_by) references user(id) on delete no action

)type=innodb;

create table article(
id int not null auto_increment primary key,
parent_id int ,
board_id int not null,
article_type int not null,
title varchar(255),
body text,
create_by int not null,

create_time datetime,
hits int unsigned,
bytes int unsigned,
last_update_by int not null,
last_update_time datetime,

index(parent_id),
index(board_id),
index(create_by),
index(last_update_by),

foreign key(parent_id) references article(id) on delete no action,
foreign key(board_id) references board(id) on delete cascade,
foreign key(create_by) references user(id) on delete no action,
foreign key(last_update_by) references user(id) on delete no action

)type=innodb;

之后�Q�我选择了用Hibernate Sychonizer来生成映��文件和实体�c�，然后对生成的�c�进行修改（删掉了生成的Base�c�）�Q?br />实际上Hibernate Sychonizer生成的映��文件也有错误，需要修改，我也是后来在使用中发现的�?br />
//User.hbm.xml

"-//Hibernate/Hibernate Mapping DTD//EN"
" http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd " >

name="User"
table="user"
>

     name="Id"
   type="integer"
   column="id"
  >

     name="Name"
   column="name"
   type="string"
   not-null="false"
   length="50"
  />
     name="Pwd"
   column="pwd"
   type="string"
   not-null="false"
   length="50"
  />
     name="Email"
   column="email"
   type="string"
   not-null="false"
   length="50"
  />

   �?font color="#0000ff">�q�里的create_by是后来修改的�Q�Hibernate Sychonizer生成的有错，后面有几处同��L��错误�?/font>

   【这里的create_by是后来修改的�?/font>

//User.java
package com.lzy.forum.domain;

public class User{
private static final long serialVersionUID = 1L;

// primary key
private java.lang.Integer id;

// fields
private java.lang.String name;
private java.lang.String pwd;
private java.lang.String email;

// collections
private java.util.Set

articlesByLastUpdateBy;
private java.util.Set

articlesByCreateBy;
private java.util.Set boards;

public java.util.Set

getArticlesByCreateBy() {
return articlesByCreateBy;
}
public void setArticlesByCreateBy(java.util.Set

articlesByCreateBy) {
this.articlesByCreateBy = articlesByCreateBy;
}
public java.util.Set

getArticlesByLastUpdateBy() {
return articlesByLastUpdateBy;
}
public void setArticlesByLastUpdateBy(
java.util.Set

articlesByLastUpdateBy) {
  this.articlesByLastUpdateBy = articlesByLastUpdateBy;
}
public java.util.Set getBoards() {
  return boards;
}
public void setBoards(java.util.Set boards) {
  this.boards = boards;
}
public java.lang.String getEmail() {
  return email;
}
public void setEmail(java.lang.String email) {
  this.email = email;
}
public java.lang.Integer getId() {
  return id;
}
public void setId(java.lang.Integer id) {
  this.id = id;
}
public java.lang.String getName() {
  return name;
}
public void setName(java.lang.String name) {
  this.name = name;
}
public java.lang.String getPwd() {
  return pwd;
}
public void setPwd(java.lang.String pwd) {
  this.pwd = pwd;
}

}

//Board.hbm.xml

"-//Hibernate/Hibernate Mapping DTD//EN"
" http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd " >

   name="Board"
  table="board"
>
   false
     name="Id"
   type="integer"
   column="id"
  >

     name="Name"
   column="name"
   type="string"
   not-null="true"
   length="50"
  />
     name="Remark"
   column="remark"
   type="string"
   not-null="false"
   length="255"
  />
     name="CreateTime"
   column="create_time"
   type="timestamp"
   not-null="false"
   length="19"
  />
     name="CreateBy"
   column="create_by"
   class="User"
   not-null="true"
  >

     name="Parent"
   column="parent_id"
   class="Board"
   not-null="false"
   lazy="false">

   【这里的board_id是后来修改的�?/font>

   �?/font>�q�里的parent_id是后来修改的�?br />

//Board.java
package com.lzy.forum.domain;

public class Board {
private static final long serialVersionUID = 1L;

// primary key
private java.lang.Integer id;

// fields
private java.lang.String name;
private java.lang.String remark;
private java.util.Date createTime;

// many to one
private com.lzy.forum.domain.User createBy;
private com.lzy.forum.domain.Board parent;

// collections
private java.util.Set articles;
private java.util.Set childBoards;

public java.util.Set getArticles() {
  return articles;
}
public void setArticles(java.util.Set articles) {
  this.articles = articles;
}
public java.util.Set getChildBoards() {
  return childBoards;
}
public void setChildBoards(java.util.Set childBoards) {
  this.childBoards = childBoards;
}
public com.lzy.forum.domain.User getCreateBy() {
  return createBy;
}
public void setCreateBy(com.lzy.forum.domain.User createBy) {
  this.createBy = createBy;
}
public java.util.Date getCreateTime() {
  return createTime;
}
public void setCreateTime(java.util.Date createTime) {
  this.createTime = createTime;
}
public java.lang.Integer getId() {
  return id;
}
public void setId(java.lang.Integer id) {
  this.id = id;
}
public java.lang.String getName() {
  return name;
}
public void setName(java.lang.String name) {
  this.name = name;
}
public com.lzy.forum.domain.Board getParent() {
  return parent;
}
public void setParent(com.lzy.forum.domain.Board parent) {
  this.parent = parent;
}
public java.lang.String getRemark() {
  return remark;
}
public void setRemark(java.lang.String remark) {
  this.remark = remark;
}

}

//Article.hbm.xml

"-//Hibernate/Hibernate Mapping DTD//EN"
" http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd " >

   name="Article"
  table="article"
>
  false
     name="Id"
   type="integer"
   column="id"
  >

     name="ArticleType"
   column="article_type"
   type="integer"
   not-null="true"
   length="11"
  />
     name="Title"
   column="title"
   type="string"
   not-null="false"
   length="255"
  />
     name="Body"
   column="body"
   type="string"
   not-null="false"
  />
     name="Hits"
   column="hits"
   type="integer"
   not-null="false"
   length="10"
  />
     name="Bytes"
   column="bytes"
   type="integer"
   not-null="false"
   length="10"
  />
     name="CreateTime"
   column="create_time"
   type="timestamp"
   not-null="false"
   length="19"
  />
     name="LastUpdateTime"
   column="last_update_time"
   type="timestamp"
   not-null="false"
   length="19"
  />
     name="LastUpdateBy"
   column="last_update_by"
   class="User"
   not-null="true"
  >

     name="CreateBy"
   column="create_by"
   class="User"
   not-null="true"
  >

     name="Parent"
   column="parent_id"
   class="Article"
   not-null="false"
  >

     name="Board"
   column="board_id"
   class="Board"
   not-null="true"
  >

   【这里的parent_id是后来修改的�?/font>

//Article.java
package com.lzy.forum.domain;

import java.util.Date;

public class Article {
private static final long serialVersionUID = 1L;
// primary key
private java.lang.Integer id;

// fields
private java.lang.Integer articleType;
private java.lang.String title;
private java.lang.String body;
private java.lang.Integer hits;
private java.lang.Integer bytes;
private java.util.Date lastUpdateTime;
private java.util.Date createTime;

// many to one
private com.lzy.forum.domain.User lastUpdateBy;
private com.lzy.forum.domain.User createBy;
private com.lzy.forum.domain.Article parent;
private com.lzy.forum.domain.Board board;

// collections
private java.util.Set articles;

public java.util.Set getArticles() {
return articles;
}

public void setArticles(java.util.Set articles) {
this.articles = articles;
}

public java.lang.Integer getArticleType() {
return articleType;
}

public void setArticleType(java.lang.Integer articleType) {
this.articleType = articleType;
}

public com.lzy.forum.domain.Board getBoard() {
return board;
}

public void setBoard(com.lzy.forum.domain.Board board) {
this.board = board;
}

public java.lang.String getBody() {
return body;
}

public void setBody(java.lang.String body) {
this.body = body;
}

public java.lang.Integer getBytes() {
return bytes;
}

public void setBytes(java.lang.Integer bytes) {
this.bytes = bytes;
}

public com.lzy.forum.domain.User getCreateBy() {
return createBy;
}

public void setCreateBy(com.lzy.forum.domain.User createBy) {
this.createBy = createBy;
}

public java.lang.Integer getHits() {
return hits;
}

public void setHits(java.lang.Integer hits) {
this.hits = hits;
}

public java.lang.Integer getId() {
return id;
}

public void setId(java.lang.Integer id) {
this.id = id;
}

public com.lzy.forum.domain.User getLastUpdateBy() {
return lastUpdateBy;
}

public void setLastUpdateBy(com.lzy.forum.domain.User lastUpdateBy) {
this.lastUpdateBy = lastUpdateBy;
}

public java.util.Date getLastUpdateTime() {
return lastUpdateTime;
}

public void setLastUpdateTime(java.util.Date lastUpdateTime) {
this.lastUpdateTime = lastUpdateTime;
}

public com.lzy.forum.domain.Article getParent() {
return parent;
}

public void setParent(com.lzy.forum.domain.Article parent) {
this.parent = parent;
}

public java.lang.String getTitle() {
return title;
}

public void setTitle(java.lang.String title) {
this.title = title;
}
public java.util.Date getCreateTime(){
return createTime;
}

public void setCreateTime(java.util.Date createTime) {
// TODO Auto-generated method stub
this.createTime = createTime;
}

}

接下来将会在web中加入Spring支持和�ؓ实体�c�L��供DAO支持。（未完待箋�Q?/font>

all gone 2006-07-18 09:54 发表评论

EJB 3.0 学习�W�记——Entity Bean

all gone — Sat, 20 May 2006 14:38:00 GMT

摘要: 在EJB 3.0 学习�W�记——准备工作中只是��单的搭好了EJB3.0开发的基本环境�Q�之后就可以开发最��单的Session Bean了，我感兴趣的还是Entity Bean�Q�所以接下来我想先试验一下Entity Bean。一、在JBoss中配�|�好Data Source我��用的是MySQL数据库，所以首先将MySQL的JDBC驱动复制到jboss-4.0.3SP1\server\al... 阅读全文

all gone 2006-05-20 22:38 发表评论

JavaScript和Applet互相调用

all gone — Thu, 04 May 2006 01:41:00 GMT

Java Script 调用 java 可以在网��里使用

可以�?/span> applet �q�行控制�Q�也可以�?/span> applet �q�回倹{�?/span>

Java 调用 Java Script

需要导�?/span> netscape.javascript.jsobject �q�个�c?/span> �Q�jre/lib/plugin.jar)

比如�Q?/span>

JSObject window=JSObject.getWindow(this);

JSObject window=(JSObject)window.getMember("document");

来获取对当前�H�口的控制权�?/span>

当点击链�?/span> MakeCall �Ӟ��会触�?/span> Java Script 函数

function makeCall(s){

window.document.ctiApplet.testJavascript(s);

alert("call maked!");

}

在这�?/span> Java Script 函数中， ctiApplet 是一�?/span> Applet �Q�这样完成了 java script 调用

Applet �?/span>

以下�?/span> ctiApplet 中的 testJavascript 函数和运行结果，其中又调用了 Java Script �?br /> public void testJavascript(String msg){

try {

// create JSObject

JSObject.getWindow (this).eval ("javascript:alert('Java Script in Applet!')") ;

}

catch (Exception ex) {

// Error on create JSObject

showStatus( "Error call javascript err=" + ex );

}

System.out.println(msg);

}

all gone 2006-05-04 09:41 发表评论

all gone — Sun, 26 Mar 2006 15:05:00 GMT

在开发EJB3.0 之前�Q�首先应该去下蝲它的一个实现和一个相应的支持EJB3的服务器�Q�我下蝲的是jboss-EJB-3.0_RC5-PFD和JBoss 4.0.3SP1 �Q�jboss-EJB-3.0_RC5-PFD里面有安装说明和一些不错的tutorial�?/p>

�Ҏ��安装说明�Q�JBoss 4.0.3SP1中的EJB3实现不是最新的�Q�应用下载的jboss-EJB-3.0_RC5-PFD中的一些包��L��换�?/p>

��jboss-EJB-3.0_RC5-PFD中lib目录下的
(1)ejb3.deployer/
(2)ejb3-clustered-sfsbcache-service.xml
(3)ejb3-interceptors-aop.xml
(4)jboss-aop-jdk50.deployer/
拯��到jboss-4.0.3SP1/server/all/deploy目录�?/p>

��jboss-EJB-3.0_RC5-PFD中lib目录下的
(5)jboss-remoting.jar
(6)jboss-serialization.jar
(7)jboss-j2ee.jar
拯��到jboss-4.0.3SP1/server/all/lib目录�?/p>

删除jboss-4.0.3SP1/server/all/lib 下的
(1)ejb3-persistence.jar
(2)hibernate3.jar
(3)hibernate-annotations.jar
(4)hibernate-entitymanager.jar
和jboss-4.0.3SP1/server/all/deploy下的
(5)jboss-aop.deployer/
到此EJB3 的运行环境准备好了，你可以用jboss-4.0.3SP1\bin\run -c all ��试JBoss是否能成功启动�?/p>

我用的IDE是Eclipse 3.2�Q�JDK 1.5 �Q��ؓ了方便在Eclipse中新��Z��个User Library�Q�EJB3_JBoss�Q?br />��jboss-EJB-3.0_RC5-PFD\lib下的
jboss-j2ee.jar
和jboss-EJB-3.0_RC5-PFD\lib\ejb3.deployer下的
ejb3-persistence.jar
jboss-ejb3x.jar
jboss-ejb3.jar
jboss-annotations-ejb3.jar
hibernate3.jar
hibernate-annotations.jar
hibernate-entitymanager.jar
��d��到EJB_JBoss中，现在环境基本上搭好了�?/p>

all gone 2006-03-26 23:05 发表评论

all gone — Sun, 18 Dec 2005 14:57:00 GMT

以前遇到JSP 处理MySQL数据库时的中文问题时�Q�采取的是很�W�的一�U�方法，直接用字�W�串�~�码转换函数�q�行转换�Q�这�ơ从�|�上搜了一下，扑ֈ�了一个��用Filter的可行方法。在Tomcat 5.5�Q?MySQL4.0.16下通过�?BR>
filter�c�L��码是从网上找的，如下
/**
*
*/
package com.lzy;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

/**
* @author lzy
*
*/
public class SetCharacterEncodingFilter implements Filter {

protected String encoding = null;
protected FilterConfig filterConfig = null;
protected boolean ignore = true;

/* (non-Javadoc)
* @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
*/
public void init(FilterConfig filterConfig) throws ServletException {
  // TODO Auto-generated method stub
  this.filterConfig = filterConfig;
     this.encoding = filterConfig.getInitParameter("encoding");
     String value = filterConfig.getInitParameter("ignore");
     if (value == null)
     this.ignore = true;
     else if (value.equalsIgnoreCase("true"))
     this.ignore = true;
     else if (value.equalsIgnoreCase("yes"))
     this.ignore = true;
     else
     this.ignore = false;

}

/* (non-Javadoc)
* @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
*/
public void doFilter(ServletRequest request, ServletResponse response,
   FilterChain chain) throws IOException, ServletException {

  // TODO Auto-generated method stub
  if (ignore || (request.getCharacterEncoding() == null)) {
   String encoding = selectEncoding(request);
   if (encoding != null)
    request.setCharacterEncoding(encoding);
  }
  chain.doFilter(request, response);
}

/* (non-Javadoc)
* @see javax.servlet.Filter#destroy()
*/
public void destroy() {
  // TODO Auto-generated method stub

  this.encoding = null;
     this.filterConfig = null;

}

protected String selectEncoding(ServletRequest request) {

return (this.encoding);

}

在web.xml 文�g中作如下讄��Q�（我��用的是Struts框架�Q?BR>
Encoding
com.lzy.SetCharacterEncodingFilter

encoding
GBK

Encoding
action

Encoding
*.jsp

最后，�q�接数据库时�Q��用下面的url�Q?BR>jdbc:mysql://localhost:3306/数据库名?useUnicode=true&characterEncoding=GBK

all gone 2005-12-18 22:57 发表评论

Spring之Hello World

all gone — Wed, 14 Dec 2005 14:07:00 GMT

1.下蝲Spring相关的开发包
下蝲地址�Q?A >http://sourceforge.net/project/showfiles.php?group_id=73357
有spring-framework-1.2.6-with-dependencies.zip�Q�一個是spring-framework-1.2.6.zip�Q�最好下载with�Q�dependencies的，里面有另外一些附加包�Q�下载后解压�~�，dist目录下是spring自��n的jar�Q�lib目录下是附加的jar�?BR>2.新徏Java Project�Q�将spring.jar�Q�dist目录下）和commons-logging.jar�Q�lib目录下）��d��到project的build path中�?BR>3.新徏POJO Bean�c�：HelloBean
//HelloBean.java
/**
*
*/
package com.lzy;

/**
* @author lzy
*
*/
public class HelloBean{

private String hello;

public void sayHello(){
System.out.println(this.getHello());
}

/**
* @return Returns the hello.
*/
public String getHello() {
return hello;
}

/**
* @param hello The hello to set.
*/
public void setHello(String hello) {
this.hello = hello;
}

}

4.新徏文�gbean.xml�Q�将在这个XML文�g中�ؓ一个HelloBean的实例的hello属性赋倹{�?BR>//bean.xml

Spring Quick Start


   hello world

5.新徏��试�c�：TestSpring
//TestSpring.java
/**
*
*/
package com.lzy;

import java.util.Locale;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;

/**
* @author lzy
*
*/
public class TestSpring {

/**
* @param args
*/
public static void main(String[] args) {
  // TODO Auto-generated method stub

  ApplicationContext ctx=new FileSystemXmlApplicationContext("bean.xml");
    HelloBean hello=(HelloBean)ctx.getBean("helloBean");
  hello.sayHello();
}

}

6.�q�行��试�c�：
如果没有出错�Q�输��Z��会看到“hello world”�?BR>

all gone 2005-12-14 22:07 发表评论

Eclipse下Hibernate入门

all gone — Sat, 10 Dec 2005 04:50:00 GMT

1.开发环�?
     Eclipse 3.2�Q�MySQL 4.0.16�Q�Hibernate3.0
    首先应该安装好Eclipse和MySQL�Q�此外准备好MySQL的JDBC Driver和Hibernate3.0,相关下蝲地址如下�Q?BR>     Eclipse SDK�Q?
        http://www.eclipse.org/downloads/index.php
       MySQL及MySQL的JDBC Driver:
           http://www.mysql.org
       Hibernate:
          http://www.hibernate.org
       此外我还安装了Eclipse的一个Hibernate插�g�Q?BR>     Hibernate synchronizer
           http://hibernatesynch.sourceforge.net

Plugin Search:
http://eclipse-plugins.2y.net/eclipse/search.jsp

Hibernate synchronizer插�g的安装和配置有问题请直接Google�?

在工�E�中其实只用��C��Hibernate synchronizer插�g的一部分功能�Q�Hibernate依赖的相关jar包最好还是手动添加，因�ؓ最开始用Hibernate synchronizer��d��时��L��发生错误�?BR> ��下载的Mysql driver和Hibernate包解压羃�Q�我们需要的只是里面相关的jar�Q�在Eclipse中新建Mysql_Driver和Hibernate两个user library,��mysql-connector-java-3.0.15-ga-bin.jar加入Mysql_Driver中，��hibernate3.jar�Q?BR>�Q�log4j-1.2.11.jar�Q�antlr-2.7.5H3.jar�Q�asm.jar�Q�asm-attrs.jar�Q�cglib-2.1.2.jar�Q�commons-collections-2.1.1.jar�Q�commons-logging-1.0.4.jar�Q�dom4j-1.6.1.jar�Q�ehcache-1.1.jar�Q�jta.jar加入到Hibernate中�?/P>

2.开�?
在Mysql中新建test数据库（Mysql其实有个�I�的test数据库）�Q�然后新��Z��面的Table

create table user (
id int(10) not null auto_increment primary key,
name varchar(20) not null,
password varchar(20) not null,
email varchar(50),
address varchar(100)
)type=innodb;

新徏Java Project�Q�将Mysql_Driver,Hibernate两个user library��d��到该工程的java build path中�?/P>

新徏与数据表对应的POJO�c�：User和Contact

/**
*
*
*/
package com.user;

/**
* @author lzy
*
*/
public class User{
    private Integer id;
    private String name;
    private String password;
    private Contact contact;

/**
* @return Returns the id.
*/
public Integer getId() {
  return id;
}
/**
* @param id The id to set.
*/
public void setId(Integer id) {
  this.id = id;
}
/**
* @return Returns the name.
*/
public String getName() {
  return name;
}
/**
* @param name The name to set.
*/
public void setName(String name) {
  this.name = name;
}
/**
* @return Returns the password.
*/
public String getPassword() {
  return password;
}
/**
* @param password The password to set.
*/
public void setPassword(String password) {
  this.password = password;
}
/**
* @return Returns the contact.
*/
public Contact getContact() {
  return contact;
}
/**
* @param contact The contact to set.
*/
public void setContact(Contact contact) {
  this.contact = contact;
}


}
/**
*
*/
package com.user;

/**
* @author lzy
*
*/
public class Contact {
private String email;
private String address;

/**
* @return Returns the address.
*/
public String getAddress() {
  return address;
}
/**
* @param address The address to set.
*/
public void setAddress(String address) {
  this.address = address;
}
/**
* @return Returns the email.
*/
public String getEmail() {
  return email;
}
/**
* @param email The email to set.
*/
public void setEmail(String email) {
  this.email = email;
}
}

之后可以用synchronizer插�g生成Hibernate配置文�g和映��文�Ӟ��相关�q�程可以参�?A >http://www.ideagrace.com/html/doc/2005/08/01/00315.html)�Q�不�q�映��文件必��ȝ��作修攏V�?/P>

hibernate.cfg.xml

PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN"
"

  jdbc:mysql://localhost/test
  com.mysql.jdbc.Driver

org.hibernate.dialect.MySQLDialect

        True
        org.hibernate.transaction.JDBCTransactionFactory

User.hbm.xml

"-//Hibernate/Hibernate Mapping DTD//EN"
"

   name="User"
  table="user"
>
     name="Id"
   type="integer"
   column="id"
  >

     name="Name"
   column="name"
   type="string"
   not-null="true"
   length="20"
  />
     name="Password"
   column="password"
   type="string"
   not-null="true"
   length="20"
  />

      name="Email"
   column="email"
   type="string"
   not-null="false"
   length="50"
  />
     name="Address"
   column="address"
   type="string"
   not-null="false"
   length="100"
  />

3.��试
��d��一个测试类�Q�HibernateTest

package com.user;

import java.util.List;
import java.util.ListIterator;

import org.hibernate.*;
import org.hibernate.cfg.*;

public class HibernateTest {
    public static void main(String[] args) throws HibernateException {
        SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();

        //
        //testInsert(sessionFactory);

        //
        testQuery(sessionFactory);


        sessionFactory.close();

    }
    public static void testInsert( SessionFactory sessionFactory )throws HibernateException {

   Session session = sessionFactory.openSession();
        Transaction tx= session.beginTransaction();
        User user = new User();
        Contact contact=new Contact();
        contact.setEmail("email");
        contact.setAddress("address");

        user.setName("caterpillar");
        user.setPassword("password");
        user.setContact(contact);

        session.save(user);
        tx.commit();
        session.close();
        System.out.println("OK�Q?);
}

    public static void testQuery( SessionFactory sessionFactory )throws HibernateException {

    Session session = sessionFactory.openSession();
        Transaction tx= session.beginTransaction();
        User user = new User();
        Contact contact=new Contact();

        Query query=session.createQuery("from User as user");
        //query.setCharacter(1, 'M');
        List names =query.list();
        for(ListIterator it=names.listIterator();it.hasNext();){
          user= (User)it.next();
          System.out.println("Id: " + user.getId());
            System.out.println("name: " + user.getName());
            System.out.println("password: " + user.getPassword());
            if(user.getContact()!=null){

            if(user.getContact().getEmail()!=null){
              System.out.println("Email: " + user.getContact().getEmail());
            }
            if(user.getContact().getAddress()!=null){
              System.out.println("Address: " + user.getContact().getAddress());

            }
            }



        }


        tx.commit();
        session.close();

    }
}

all gone 2005-12-10 12:50 发表评论

Eclipse下JSF入门

all gone — Sat, 10 Dec 2005 04:05:00 GMT

1.开发环�?
与Eclipse下Struts的开发类��|��安装好Eclipse和Tomcat之后�Q�还需要两个插�Ӟ��tomcat 插�g和JSF插�g�Q�如果相��x��件还没有安装�Q�，以下是相关下载地址�Q?
Eclipse SDK�Q?
http://www.eclipse.org/downloads/index.php
JSF:
https://sourceforge.jp/projects/amateras/files/
FaceIDE+htmlEditor�Q�htmlEditer也是必要�?
Tomcat :
http://www.sysdeo.com/eclipse/tomcatplugin
Plugin Search:
http://eclipse-plugins.2y.net/eclipse/search.jsp
插�g的安装和配置有问题请直接Google�?
2.开�?
入门嘛，我们��找一个最��单的Login��可以了

新徏Tomcat project
加入JSF支持

新徏一个ManagedBean�Q?

/**
*
*/
package com.jsf;

/**
* @author lzy
*
*/
public class UserBean {
private String name;
private String password;
public String verify() {
if(this.name.equals("name")&&this.password.equals("password"))

return "failure";

else
return "success";
}

/**
* @return Returns the name.
*/
public String getName() {
return name;
}

/**
* @param name The name to set.
*/
public void setName(String name) {
this.name = name;
}

/**
* @return Returns the password.
*/
public String getPassword() {
return password;
}

/**
* @param password The password to set.
*/
public void setPassword(String password) {
this.password = password;
}

}

新徏两个JSP��面�Q�login.jsp,welcom.jsp

login.jsp
<%@ page contentType="text/html; charset=GBK" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>

<%@ page contentType="text/html; charset=GBK" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>

welcome.jsp

<%@ page contentType="text/html; charset=GBK" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>

is a good boy�Q?

welcome JavaServer Faces

�~�辑WEB�Q�INF/lib下的faces�Q�config.xml

struts-config.xml

http://java.sun.com/dtd/web-facesconfig_1_1.dtd">

/login.jsp

success

/welcome.jsp

failure

/login.jsp

user

com.jsf.UserBean

session

最后是资源文�g

# --login.jsp--
header=Welcom
namePromt=Name:
passwordPromt=Password:
amountPromt=Amount:
datePromt=Date:
submitPromt=Submit
resetPromt=Reset
footer=Thank you!

3.��试
在test工程中选择tomcat project�Q?gt;Update context definition
然后�q�行Tomcat
http://127.0.0.1:8080/jsfTest/login.jsf

all gone 2005-12-10 12:05 发表评论

all gone — Sat, 10 Dec 2005 03:10:00 GMT

1.开发环�?BR>   开发之前首先应该准备好开发环境，Eclipse 3.X是一个不错的Java IDE�Q�有很多插�g可以供我们选择�Q�服务器用Tomcat��p��了。安装好Eclipse和Tomcat之后�Q�还需要两个插�Ӟ��tomcat 插�g和Struts插�g�Q�以下是相关下蝲地址�Q?BR>     Eclipse SDK�Q?BR>        http://www.eclipse.org/downloads/index.php
    Struts:
     https://sourceforge.jp/projects/amateras/files/         StrutsIDE+htmlEditor�Q�htmlEditer也是必要�?BR>    Tomcat :
         http://www.sysdeo.com/eclipse/tomcatplugin
    Plugin Search:
         http://eclipse-plugins.2y.net/eclipse/search.jsp
   插�g的安装和配置有问题请直接Google�?BR>2.开�?BR>    入门嘛，我们��找一个最��单的Login��可以了

新徏Tomcat project�Q�如下图

加入struts支持
新徏一个FormBean:LoginForm

/**
*
*/
package com.test;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;

/**
* @author lzy
*
*/
public class LoginForm extends ActionForm {

private String name=null;
private String password=null;
/* (non-Javadoc)
* @see org.apache.struts.action.ActionForm#reset(org.apache.struts.action.ActionMapping, javax.servlet.http.HttpServletRequest)
*/
@Override
public void reset(ActionMapping arg0, HttpServletRequest arg1) {
  // TODO Auto-generated method stub
  name=null;
  password=null;
}
/* (non-Javadoc)
* @see org.apache.struts.action.ActionForm#validate(org.apache.struts.action.ActionMapping, javax.servlet.http.HttpServletRequest)
*/
@Override
public ActionErrors validate(ActionMapping arg0, HttpServletRequest arg1) {
  // TODO Auto-generated method stub
ActionErrors errors=new ActionErrors();

  if(name==null||name.length()<1){
   errors.add("username",new ActionMessage("errors.login.name.empty"));

  }
  if(password==null||password.length()<1){
   errors.add("password",new ActionMessage("errors.login.password.empty"));

  }

  return errors;
}
/**
* @return Returns the name.
*/
public String getName() {
  return name;
}
/**
* @param name The name to set.
*/
public void setName(String name) {
  this.name = name;
}
/**
* @return Returns the password.
*/
public String getPassword() {
  return password;
}
/**
* @param password The password to set.
*/
public void setPassword(String password) {
  this.password = password;
}
}

新徏一个Action:LoginAction

/**
*
*/
package com.test;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.struts.*;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

/**
* @author lzy
*
*/
public class LoginAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm actionForm, HttpServletRequest request, HttpServletResponse response) throws Exception {
  // TODO Auto-generated method stub
  LoginForm loginForm=(LoginForm)actionForm;
  String name=loginForm.getName();
  String password=loginForm.getPassword();

if(name.equals("name")&&password.equals("password")){
HttpSession session=request.getSession(true);
session.setAttribute("LOGGED_USER",name);

   return mapping.findForward("success");

  }
  else{
   ActionMessages errors=new ActionMessages();
   errors.add("login.failure",new ActionMessage("errors.login.failure"));
   this.saveErrors(request,errors);

   return mapping.findForward("failure");

  }

}

}

新徏两个JSP��面�Q�login.jsp,index.jsp

login.jsp
<%@ page contentType="text/html; charset=GBK" %>
<%@ taglib uri="/tags/struts-html" prefix="html" %>
<%@ taglib uri="/tags/struts-tiles" prefix="tiles" %>

index.jsp

<%@ page contentType="text/html; charset=GBK" %>
<%@ taglib uri="/tags/struts-bean" prefix="bean" %>
<%@ taglib uri="/tags/struts-logic" prefix="logic" %>
<%@ taglib uri="/tags/struts-html" prefix="html" %>
<%@ taglib uri="/tags/struts-nested" prefix="nested" %>

hello
  ,

�~�辑WEB�Q�INF/lib下的struts�Q�config.xml

struts-config.xml

最后是资源文�g

# -- standard errors --
errors.header=

Errors:

errors.prefix=

errors.suffix=

errors.footer=

form.submit=Submit

form.reset=Reset

# -- login.jsp --
login.jsp.title=Login
login.jsp.form.title=Login
login.jsp.name=Name:
login.jsp.password=Password:

# -- login errors --
errors.login.name.empty=The name can not be empty!
errors.login.password.empty=The password can not be empty!
errors.login.failure=Login failed!
Please check your username and password!

3.��试
在test工程中选择tomcat project�Q?gt;Update context definition
然后�q�行Tomcat
http://127.0.0.1:8080/test/login.jsp

all gone 2005-12-10 11:10 发表评论

Java Web Service 之SOAP入门

all gone — Fri, 09 Dec 2005 11:39:00 GMT

�q�几天在图书馆看��C��一本书《Java SOAP�~�程指南》，��Z��Ҏ��兴�v的web service的好奇，借了回来。看了一下SOAP的介�l�，没太明白�Q�只知道是Simple Object Access Protocol,和XML�l�合可以提供跨��^台的服务�?BR> �~�程的�h��L��q�么一个爱好，开始的时候总要拿一个HelloWorld似的例子试试�Q�我也不例外�?要试当然要有SOAP的运行环境。按照书上的指示�Q�装好了Tomcat�Q�下载了相关的包�Q�将soap.jar ,mail.jar,activatio.jar,xercesImpl.jar 加入��C��环境变量classpath中，��soap.war拯��C��TOMCAT的webapps目录下�?BR> �q�行SOAP的测试目录：HTTP://127.0.0.1:8080/soap/发现soap已经正常工作�?接着便是部��v新的SOAP服务了，按照书上的源码，写好了测试用的部�|�类和客��L��c�，�~�译通过。在部��v新的SOAP的web��面下按照书上的步骤��d��表单�q��|�完成。将��试所在目录添加到classpath中�?重启tomcat�?�q�行刚才�~�译好的客户端类�Q�结果NoClassDefError�?BR> 试了好几遍，都是�q�样�Q�很是让我郁闷啊�?看了另一本书《java web服务应用开发详解》终于找��C��{�案�Q?�q�行客户端测试程序时�Q?**Client.class是在Package test中的 �q�行旉��回到test的上�U�目录，java test.***Client 卛_��?我想遇到�c�M��问题�Q�还是对java的包不熟悉�?

all gone 2005-12-09 19:39 发表评论

Eclipse 使用��结

all gone — Fri, 09 Dec 2005 11:38:00 GMT

         Eclipse�Q�我想�Q何一个学习Java的�h都会知道它，一个很不错的开发环境，不光能开发基于Java的各�U�程序，�q�能做C�Q�＋开发，比�vJBuilder�Q�我觉得Eclipse有过之而无不及�Q�尤其它�q�是一个开源项目，很多东西都是JBuilder没有的�?nbsp;
         Eclipse 是一个基于插件的开发��^収ͼ�很多功能都是通过插�g来完成的。比如说要做Java囑�Ş界面开发，如��用AWT和SWING的开发，��需要下载相应的插�g�Q�因此��用Eclipse旉��了基本的Eclipse SDK�q�需要下载安装相应的插�g�?
下面是一些相关的下蝲地址�Q?BR>    Eclipse SDK�Q?BR>          http://www.eclipse.org/downloads/index.php�Q�v3.1.1�Q?nbsp;

    SWING+AWT:
         Visual Editor: http://www.eclipse.org/vep/ (v1.1.0.1 released)

    Struts:
         StrutsIDE+htmlEditor: https://sourceforge.jp/projects/amateras/files/( v1.1.7+1.6.7)
   J2EE:
         Tomcat : http://www.sysdeo.com/eclipse/tomcatplugin
         Lomboz: http://forge.objectweb.org/project/showfiles.php?group_id=97

   JSF:
       faceIDE https://sourceforge.jp/projects/amateras/files/( v1.1.7+1.6.7)

   Hibernate:
         Hibernate synchronizer http://hibernatesynch.sourceforge.net

Plugin Search:
         http://eclipse-plugins.2y.net/eclipse/search.jsp

all gone 2005-12-09 19:38 发表评论

JBuilder 开发J2ME�E�序�W�一�?

all gone — Fri, 09 Dec 2005 11:33:00 GMT

安装完JBuilder 9 Enterprise版后�Q�看��C��l�中说可以支持J2ME的开发，所以想试一下�? 因�ؓJ2ME需要另外的jdk支持�Q�所以第一步就是安装相应的wireless toolkit jdk. 相应的jdk可以从sun的官方网站上下蝲�Q�安装过�E�也非常��? �q�里不再详叙�? 安装完后�Q�将新的jdk��d��到JBuilder的配�|�中�Q�Tools->Configure JDKs 之后�Q�新建工�E�，选择刚才的jdk�? 打开Project->Project Properties,在run 选项卡中点New 在弹出框中选择run, type改�ؓMIDlet(原来为Application)�? 之后��可以新建MIDlet了�?

all gone 2005-12-09 19:33 发表评论

JSP实现留言板的JavaBean�c�d��分页昄��的源�?

all gone — Fri, 09 Dec 2005 11:30:00 GMT

//留言bean
package userinfobean;

/**
*

Title:

Description:

Company:

* @author not attributable
* @version 1.0
*/

public class memoBean {

private String id;//1.用户�?BR> private String email;//2.密码
private String content;//3.留言

public memoBean() {
}
//1.用户�?BR> public void setId(String s){
    this.id=s;
}
//2.密码
public void setEmail(String s){
    this.email=s;
}
//3.留言
   public void setContent(String s){
    this.content=s;
}

//1.用户�?BR>   public String getId( ){
     return this.id;
   }
   //2.密码
   public String getEmail(){
     return this.email;
   }
   //3.留言
   public String getContent(){
     return this.content;
   }
}
//// 用于数据库操作的bean
package userinfobean;

import userinfobean.*;
import java.io.*;
import java.util.*;
import java.sql.*;

public class databaseBean{
private String dbName;
private String dbUser;
private String dbPass;
private Vector memoVector;

Connection connection;

public databaseBean(){
    dbName=new String("×××××××");
    dbUser=new String("××××××");
    dbPass=new String("×××××××");
    String connectionUrl="jdbc:mysql://localhost/"+dbName;
    try{
      Class.forName("org.gjt.mm.mysql.Driver");
      connection=DriverManager.getConnection(connectionUrl,dbUser,dbPass);
    }
    catch(Exception e){
      System.out.println(e.toString());
      }
}

public void dbQueryMemos(){
    try{
       memoVector=new Vector();
      Statement stmt=connection.createStatement();
      ResultSet rs=stmt.executeQuery("select * from memo;");
      while(rs.next()){
        memoBean temp=new memoBean();
        temp.setId(rs.getString(2));
        temp.setEmail(rs.getString(3));
        temp.setContent(rs.getString(4));
        memoVector.add(temp);
      }

   }
   catch(SQLException e){
     System.out.println(e.toString());
   }

}

    public void setDbName(String s){
    this.dbName=s;
}
public void setDbUser(String s){
    this.dbUser=s;
}
public void setDbPass(String s){
    this.dbPass=s;
}

public String getDbName(){
    return this.dbName;
}
public String getDbUser(){
    return this.dbUser;
}
public String getDbPass(){
    return this.dbPass;
}
    public Vector getMemoVector(){
    return this.memoVector;

}

}

///以下是网��|��?BR>

<%@ page language="java" import="java.util.*" %>
<%@ page import="java.text.*" %>
<%@ page import="userinfobean.*" %>

<%!
int totalPages;
int countPerPage=3;
int totalCount;
int currentPage=0;
int currentStart;
%>
<%
memoQuery.dbQueryMemos();
Vector vt=memoQuery.getMemoVector();
totalCount=vt.size();
totalPages=totalCount/countPerPage;
if(totalCount%countPerPage>0)totalPages=totalPages+1;
if(request.getParameter("page")==null)
{
currentPage=1;
}
else
{
currentPage=Integer.parseInt(request.getParameter("page"));
if(currentPage>totalPages)currentPage=totalPages;
if(currentPage<1)currentPage=1;
}
currentStart=totalCount-1-countPerPage * (currentPage-1);
%>

NetGreen

�?�?lt;/td>	收藏本页
退 �?	我要留言

首页

登陆

留言�?lt;/a>

共有留言<%out.print(totalPages);%> ��，现在是第<%out.print(currentPage);%> ��?lt;/td>

     上一��?
     下一��?nbsp;
     首页
      ��N��


                      ��?lt;/td>

              <%

    for(int i=0;i=0;i++)
    {
     memoInfo.setId(((memoBean)vt.get(currentStart-i)).getId());
     memoInfo.setEmail(((memoBean)vt.get(currentStart-i)).getEmail());
     memoInfo.setContent(((memoBean)vt.get(currentStart-i)).getContent());



   out.print("

"); out.print(memoInfo.getId()); out.print("	"); out.print(memoInfo.getEmail()); out.print("
"); out.print(memoInfo.getContent()); out.print("

");
   out.print("
");

    }

   %>

all gone 2005-12-09 19:30 发表评论

JDBC�q�接MySQL数据�?

all gone — Fri, 09 Dec 2005 11:29:00 GMT

Step1�Q?BR>      查找驱动�E�序 MySQL目前提供的java驱动�E�序为Connection/J�Q�可以从MySQL官方�|�站下蝲�Q��ƈ扑ֈ�mysql-connector-java-3.0.15-ga-bin.jar文�g�Q�此驱动�E�序为纯java驱动�E�序�Q�不需做其他配�|��?
Step2�Q?BR>      动态指定classpath 如果需要执行时动态指定classpath�Q�就在执行时采用�Q�cp方式。否则将上面�?jar文�g加入到classpath环境变量中�?BR> Step3�Q?BR>      加蝲驱动�E�序
       try{
               Class.forName("com.mysql.jdbc.Driver");
                System.out.println("Success loading Mysql Driver!");
       }
      catch(Exception e) {
               System.out.println("Error loading Mysql Driver!");
                e.printStackTrace();
        }
Step4�Q?BR>        讄��q�接的url jdbc�Q�mysql�Q?/localhost/databasename[?pa=va][&pa=va]

all gone 2005-12-09 19:29 发表评论

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Struts2 入门

EJB3.0 + Struts���试

SSH(Spring + Struts + Hibernate)���试 之三

SSH(Spring + Struts + Hibernate)���试 之二

SSH(Spring + Struts + Hibernate)���试 之一

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JavaScript和Applet互相调用

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welcome JavaServer Faces

Errors:

Java Web Service 之SOAP入门

Eclipse 使用���结

JBuilder 开发J2ME�E�序�W�一�?

JSP实现留言板的JavaBean�c�d��分页昄���的源�?

JDBC�q�接MySQL数据�?

EJB3.0 + Struts��试

SSH(Spring + Struts + Hibernate)��试之三

SSH(Spring + Struts + Hibernate)��试之二

SSH(Spring + Struts + Hibernate)��试之一

Eclipse 使用��结

JSP实现留言板的JavaBean�c�d��分页昄��的源�?