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2011年3月8日
beans.xml  beans<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
<context:annotation-config />
<context:component-scan base-package="cc.rm" />
<bean
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<value>classpath:jdbc.properties</value>
</property>
</bean>
<bean id="dataSource" destroy-method="close"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName"
value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
</bean>
<!--DataSource -->
<bean id="sf"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan">
<list>
<value>cc.rm.vo</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.MySQLDialect
</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory" ref="sf"></property>
</bean>
<bean id="txManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sf" />
</bean>
<aop:config>
<aop:pointcut id="bussinessService"
expression="execution(public * cc.rm.*.*(..))" />
<aop:advisor pointcut-ref="bussinessService"
advice-ref="txAdvice" />
</aop:config>
<tx:advice id="txAdvice" transaction-manager="txManager">
<tx:attributes>
<tx:method name="*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
</beans>
jdbc.properties
 propertiesjdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/ll
jdbc.username=root
jdbc.password=1244
在web.xml里加入
 web.xml<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>WEB-INF/:beans.xml,</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
需要先安裝ODBC,才可以使用ODBC連接方式連接數(shù)據(jù)庫 下載地址:mysql-connector-odbc-5.1.8-win32.msi 1 2 3 4 5 
new SchemaExport(new AnnotationConfiguration().configure()).create(false, true);
<?xml version='1.0' encoding='gb2312'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<!--顯示執(zhí)行的SQL語句-->
<property name="show_sql">true</property>
<!--連接字符串-->
<property name="connection.url">jdbc:mysql://localhost:3306/Test</property>
<!--連接數(shù)據(jù)庫的用戶名-->
<property name="connection.username">sa</property>
<!--數(shù)據(jù)庫用戶密碼-->
<property name="connection.password">sa</property>
<!--數(shù)據(jù)庫驅(qū)動(dòng)-->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<!--JDBC連接池(使用內(nèi)置的連接池)-->
<property name="connection.pool_size">1</property>
<!--設(shè)置Hibernate自動(dòng)管理上下文的策略-->
<property name="current_session_context_class">thread</property>
<!--選擇使用的方言-->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!--在啟動(dòng)時(shí)刪除并重新創(chuàng)建數(shù)據(jù)庫-->
<property name="hbm2ddl.auto">create</property>
<mapping resource="events/User.hbm.xml"/>
<mapping resource="events/Student.hbm.xml"/>
</session-factory>
</hibernate-configuration>
一、設(shè)計(jì)過程包含五個(gè)主要步驟。
第 1 步:確定實(shí)體和關(guān)系
第 2 步:確定所需數(shù)據(jù)
第 3 步:規(guī)范化數(shù)據(jù)
第 4 步:解析關(guān)系
第 5 步:驗(yàn)證設(shè)計(jì)
二、閱讀別人的概念模型圖:
不管是從左到右讀取還是從右到左讀取,下面的規(guī)則都會(huì)使讀取這些圖示變得容易:讀取 (1) 第一個(gè)實(shí)體的名稱,(2) 第一個(gè)實(shí)體 旁邊的角色,(3) 到第二個(gè)實(shí)體 的連接的基數(shù),(4) 第二個(gè)實(shí)體的名稱。
三、確定所需數(shù)據(jù)(實(shí)體屬性的設(shè)計(jì))需要注意的:
確定支持?jǐn)?shù)據(jù)時(shí),一定要參考前面確定的活動(dòng)以了解將如何訪問這些數(shù)據(jù)。
例如,在某些情況下可能需要按雇員的名字列出雇員,而在另一些情況下可能需要按姓氏列出。要滿足這兩種需要,應(yīng)創(chuàng)建一個(gè) First Name 屬性和一個(gè) Last Name 屬性,而不應(yīng)創(chuàng)建一個(gè)既包含名字又包含姓氏的屬性。將姓氏和名字分開后,以后可以創(chuàng)建兩個(gè)索引,分別適用于這兩項(xiàng)任務(wù)。
請選擇一致的名稱。使用一致的名稱可以使數(shù)據(jù)庫便于維護(hù),并且便于閱讀報(bào)告和輸出窗口。
例如,如果一個(gè)屬性使用了縮略名稱,如 Emp_status,則另一個(gè)屬性不應(yīng)使用完整名稱,如 Employee_ID。應(yīng)使名稱保持一致,如 Emp_status 和 Emp_ID。
在這個(gè)階段,數(shù)據(jù)是否與正確的實(shí)體相關(guān)聯(lián)并不十分重要。您可以根據(jù)自己的判斷進(jìn)行設(shè)計(jì)。在下一節(jié)中,將對設(shè)計(jì)進(jìn)行測試,檢查您的判斷是否正確。
四、規(guī)范化是指一系列測試,通過這些測試可以消除冗余的數(shù)據(jù),并確保數(shù)據(jù)與正確的實(shí)體或關(guān)系相關(guān)聯(lián)。共有五項(xiàng)測試。本節(jié)介紹其中前三項(xiàng)測試。這三項(xiàng)測試最重要,因此也最常使用。
五、范式:
數(shù)據(jù)規(guī)范化包括幾項(xiàng)測試。數(shù)據(jù)在通過了第一項(xiàng)測試后,我們認(rèn)為它滿足第一范式;通過了第二項(xiàng)測試后,它滿足第二范式;通過了第三項(xiàng)測試后,則滿足第三范式。
六、標(biāo)識(shí)符是唯一地標(biāo)識(shí)實(shí)體中各行的一組屬性,至少由一個(gè)屬性組成。
七、解析關(guān)系:
執(zhí)行完規(guī)范化過程后,設(shè)計(jì)幾乎就完成了。唯一還需要做的事情就是生成與概念數(shù)據(jù)模型相對應(yīng)的物理數(shù)據(jù)模型。這個(gè)過程也稱作解析關(guān)系,因?yàn)槠渲猩婕暗拇罅抗ぷ骶褪菍⒏拍钅P椭械年P(guān)系轉(zhuǎn)換為相應(yīng)的表和外鍵關(guān)系。
八、概念數(shù)據(jù)模型可以簡化設(shè)計(jì)過程,因?yàn)樗鼘⒋罅考?xì)節(jié)隱藏起來。例如,多對多關(guān)系總會(huì)生成一個(gè)額外的表和兩個(gè)外鍵引用。在概念數(shù)據(jù)模型中,通常可以用一個(gè)連接來標(biāo)識(shí)這類結(jié)構(gòu)。
九、域(用戶定義的數(shù)據(jù)類型)
十、數(shù)據(jù)庫對象的定義構(gòu)成了數(shù)據(jù)庫模式:您可以將模式看做一個(gè)空數(shù)據(jù)庫。(是否可以理解成C#的命名空間或java里的包概念)
十一、
這個(gè)插件在JQuery1.5.1版下無法使用。 項(xiàng)目地址:http://dev.iceburg.net/jquery/tableEditor/demo.php html文件:  html<table id="editableTable" border="0" cellspacing="0" cellpadding="0">
<thead>
<tr>
<th name="ID">ID</th>
<th name="first">First Name</th>
<th name="last">Last Name</th>
<th>Phone</th>
<th name="city">City</th>
<th name="email">Email</th>
</tr>
<tr>
<td><key>233</key> <button class="eventLink">edit</button></td>
<td><input type="text" name="XXXX" val="YYYY"></input></td>
<td>XXX</td>
<td><input type="checkbox" checked name="zzTop"></input></td>
<td><input type="checkbox" name="yyy"></input></td>
<td><select name="yyy"><option>XXX</option><option SELECTED>YYY</option></select></td>
</tr>
</thead>
<tbody>
<tr>
<td><key>1</key> <button class="eventLink">edit</button></td>
<td>Brice</td>
<td>Burgess</td>
<td>(800)768-5283</td>
<td>Milwaukee</td>
<td>b@b.com</td>
</tr>
<tr>
<td><key>2</key> <button class="eventLink">edit</button></td>
<td>Christian</td>
<td>Bach</td>
<td>(800)768-6288</td>
<td>Chicago</td>
<td>c@c.com</td>
</tr>
<tr>
<td><key>3</key> <button class="eventLink">edit</button></td>
<td>Abe</td>
<td>Lincoln</td>
<td>(800)223-2331</td>
<td>Washington D.C.</td>
<td>l@l.com</td>
</tr>
<tr>
<td><key>8</key> <button class="eventLink">edit</button></td>
<td>Sam Lightning</td>
<td>Hopkings</td>
<td>(800)728-1221</td>
<td>Houston</td>
<td>s@s.com</td>
</tr>
<tr>
<td><key>15</key> <button class="eventLink">edit</button></td>
<td>Rudyard</td>
<td>Kipling</td>
<td>(512)121-1280</td>
<td>London</td>
<td>r@r.com</td>
</tr>
</tbody>
</table>
js文件
 js<script type="text/javascript">
$().ready(function() {
$("#editableTable").tableSorter({
sortClassAsc: 'headerSortUp', // class name for ascending sorting action to header
sortClassDesc: 'headerSortDown', // class name for descending sorting action to header
headerClass: 'header', // class name for headers (th's)
disableHeader: 'ID' // DISABLE Sorting on ID
}).tableEditor({
EDIT_HTML: 'edit',
SAVE_HTML: 'save',
EVENT_LINK_SELECTOR: 'button.eventLink',
FUNC_UPDATE: 'updateTable'
});
document.counter = 0;
});
function updateTable(o) {
document.counter++;
if ((document.counter%2) == 0) {
// restore row
alert('Update failed. Row restore.');
$.tableEditor.lib.restoreRow(o.row,o.original);
}
else
alert('Update Success');
return true;
}
</script>
從DLOG4J讀到的Request的工具類:  java/*
* RequestUtils.java
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Author: Winter Lau (javayou@gmail.com)
* http://dlog4j.sourceforge.net
*/
package com.liusoft.dlog4j.util;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintStream;
import java.text.MessageFormat;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Properties;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.liusoft.dlog4j.Globals;
/**
* 用于Request的工具類
* @author Winter Lau
*/
public class RequestUtils extends org.apache.struts.util.RequestUtils{
final static Log log = LogFactory.getLog(RequestUtils.class);
private static Properties header_map;
private static String default_mobile;
static{
InputStream in = RequestUtils.class.getResourceAsStream("/com/liusoft/dlog4j/util/mobile_match.properties");
header_map = new Properties();
try{
header_map.load(in);
default_mobile = header_map.getProperty("empty");
}catch(IOException e){
log.error("加載手機(jī)號(hào)碼匹配策略文件/mobile_match.conf失敗",e);
}
}
public static boolean isMultipart(HttpServletRequest req) {
return ((req.getContentType() != null) && (req.getContentType()
.toLowerCase().startsWith("multipart")));
}
/**
* 獲取FCKUpload過程中生成的會(huì)話ID
* @return
*/
public static String getDlogSessionId(HttpServletRequest req){
//優(yōu)先從Cookie中獲取ssn_id值
String ssn_id = null;
Cookie cok = RequestUtils.getCookie(req, Globals.SESSION_ID_KEY_IN_COOKIE);
if(cok != null){
ssn_id = cok.getValue();
}
if(StringUtils.isEmpty(ssn_id)){
//如果Cookie得不到則從服務(wù)器的會(huì)話中讀取
HttpSession ssn = req.getSession(false);
if (ssn != null)
ssn_id = ssn.getId();
}
return ssn_id;
}
/**
* 清除FCKUpload過程中生成的Cookie
* @param req
* @param res
*/
public static void clearDlogSessionId(HttpServletRequest req, HttpServletResponse res){
Cookie cok = RequestUtils.getCookie(req, Globals.SESSION_ID_KEY_IN_COOKIE);
if(cok != null){
cok.setMaxAge(0);
res.addCookie(cok);
}
}
/**
* 獲取COOKIE
*
* @param name
*/
public static Cookie getCookie(HttpServletRequest request, String name) {
Cookie[] cookies = request.getCookies();
if(cookies == null)
return null;
for (int i = 0; i < cookies.length; i++) {
if (name.equals(cookies[i].getName())) {
return cookies[i];
}
}
return null;
}
/**
* 設(shè)置COOKIE
*
* @param name
* @param value
* @param maxAge
*/
public static void setCookie(HttpServletRequest request, HttpServletResponse response, String name,
String value, int maxAge) {
Cookie cookie = new Cookie(name, value);
cookie.setMaxAge(maxAge);
String serverName = request.getServerName();
String domain = getDomainOfServerName(serverName);
if(domain!=null && domain.indexOf('.')!=-1){
cookie.setDomain('.' + domain);
}
cookie.setPath("/");
response.addCookie(cookie);
}
/**
* 獲取用戶訪問URL中的根域名
* 例如: www.dlog.cn -> dlog.cn
* @param req
* @return
*/
public static String getDomainOfServerName(String host){
if(StringUtils.isIPAddr(host))
return null;
String[] names = StringUtils.split(host, '.');
int len = names.length;
if(len>=2)
return names[len-2]+'.'+names[len-1];
return host;
}
public static void main(String[] args){
String host = "127.0.0.1";
System.out.println("DOMAIN: " + getDomainOfServerName(host));
host = "dlog.cn";
System.out.println("DOMAIN: " + getDomainOfServerName(host));
host = "abc.mail.dlog.cn";
System.out.println("DOMAIN: " + getDomainOfServerName(host));
}
/**
* 從URL地址中解析出URL前綴,例如
* http://wap.mo168.com:8081/index.jsp -> http://wap.mo168.com:8081
* @param req
* @return
*/
public static String getUrlPrefix(HttpServletRequest req){
StringBuffer url = new StringBuffer(req.getScheme());
url.append("://");
url.append(req.getServerName());
int port = req.getServerPort();
if(port!=80){
url.append(":");
url.append(port);
}
return url.toString();
}
/**
* 獲取訪問的URL全路徑
* @param req
* @return
*/
public static String getRequestURL(HttpServletRequest req){
StringBuffer url = new StringBuffer(req.getRequestURI());
String param = req.getQueryString();
if(param!=null){
url.append('?');
url.append(param);
}
String path = url.toString();
return path.substring(req.getContextPath().length());
}
/**
* 打印所有的頭信息
* @param out
* @param req
*/
public static void dumpHeaders(PrintStream out, HttpServletRequest req){
Enumeration names = req.getHeaderNames();
while(names.hasMoreElements()){
String name = (String)names.nextElement();
out.println(name+"="+req.getHeader(name));
}
}
/**
* 從請求中解析手機(jī)號(hào)碼
* @param req
* @return
*/
public static String getRequestMobile(HttpServletRequest req){
String mobile = default_mobile;
Iterator keys = header_map.keySet().iterator();
while(keys.hasNext()){
String header = (String)keys.next();
String value = getHeader(req,header);
if(value!=null){
String pattern = (String)header_map.get(header);
MessageFormat mf = new MessageFormat(pattern);
try{
Object[] vs = mf.parse(value);
mobile = (String)vs[0];
if(mobile.startsWith("86"))
mobile = mobile.substring(2);
break;
}catch(Exception e){
log.warn("解析header失敗",e);
dumpHeaders(req, System.err);
continue;
}
}
}
return mobile;
}
/**
* 獲取header信息,名字大小寫無關(guān)
* @param req
* @param name
* @return
*/
public static String getHeader(HttpServletRequest req, String name){
String value = req.getHeader(name);
if(value!=null)
return value;
Enumeration names = req.getHeaderNames();
while(names.hasMoreElements()){
String n = (String)names.nextElement();
if(n.equalsIgnoreCase(name)){
return req.getHeader(n);
}
}
return null;
}
/**
* 打印所有頭信息
* @param req
* @param out
*/
public static void dumpHeaders(HttpServletRequest req, PrintStream out){
Enumeration hds = req.getHeaderNames();
out.println("=============== HEADERS ===============");
while(hds.hasMoreElements()){
String name = (String)hds.nextElement();
out.println(name+"="+req.getHeader(name));
}
}
/**
* 判斷手機(jī)是否支持某種類型的格式
* @param req
* @param contentType
* @return
*/
public static boolean support(HttpServletRequest req, String contentType){
String accept = getHeader(req, "accept");
if(accept!=null){
accept = accept.toLowerCase();
return accept.indexOf(contentType.toLowerCase())!=-1;
}
return false;
}
/**
* 判斷瀏覽器是否與Mozilla兼容
* @param req
* @return
*/
public static boolean isMozillaCompatible(HttpServletRequest req){
String user_agent = req.getHeader("user-agent");
return user_agent==null || user_agent.indexOf("Mozilla")!=-1;
}
/**
* 獲取瀏覽器提交的整形參數(shù)
* @param param
* @param defaultValue
* @return
*/
public static int getParam(HttpServletRequest req, String param, int defaultValue){
try{
String value = req.getParameter(param);
int idx = value.indexOf('#');
if(idx!=-1)
value = value.substring(0,idx);
return Integer.parseInt(value);
}catch(Exception e){}
return defaultValue;
}
/**
* 獲取瀏覽器提交的字符串參數(shù)
* @param param
* @param defaultValue
* @return
*/
public static String getParam(HttpServletRequest req, String param, String defaultValue){
String value = req.getParameter(param);
return (StringUtils.isEmpty(value))?defaultValue:value;
}
}
 java/*
* SiteAction.java
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Author: Winter Lau
* http://dlog4j.sourceforge.net
*/
package com.liusoft.dlog4j;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletContext;
import org.apache.commons.lang.StringUtils;
/**
* DLOG在安全方面的一些處理方法
* 敏感詞匯表:/WEB-INF/conf/illegal_glossary.dat
*
* @author Winter Lau
*/
public class DLOGSecurityManager {
/**
* 初始化
* @param sc
* @throws IOException
*
* @see com.liusoft.dlog4j.servlet.DLOG_ActionServlet#init()
*/
public static void init(ServletContext sc) throws IOException {
IllegalGlossary.init(sc);
}
public static void destroy(){
IllegalGlossary.destroy();
}
/**
* 敏感字匯
* @author Winter Lau
*/
public static class IllegalGlossary {
private final static String file_glossary = "/WEB-INF/conf/illegal_glossary.dat";
private static List glossary = null;
public static void init(ServletContext sc) throws IOException {
glossary = new ArrayList(1000);
if(sc!=null)
loadIllegalGlossary(sc);
}
public static void destroy(){
if(glossary!=null)
glossary.clear();
}
/**
* 加載敏感詞匯表
* @param sc
* @throws IOException
*/
private synchronized static void loadIllegalGlossary(ServletContext sc) throws IOException {
InputStream in = sc.getResourceAsStream(file_glossary);
BufferedReader reader = null;
try{
reader = new BufferedReader(new InputStreamReader(in));
do{
String line = reader.readLine();
if(line==null)
break;
glossary.add(line.trim());
}while(true);
}finally{
in.close();
}
}
/**
* 自動(dòng)將敏感詞匯用XXX替換
*
* @param content
* @return
*/
public static String autoGlossaryFiltrate(String content) {
if(StringUtils.isEmpty(content))
return content;
for (int i = 0; i < glossary.size(); i++) {
String word = (String)glossary.get(i);
content = StringUtils.replace(content, word, StringUtils
.repeat("X", word.length()));
}
return content;
}
/**
* 判斷是否存在非法內(nèi)容
* @param content
* @return
*/
public static boolean existIllegalWord(String content){
if(StringUtils.isEmpty(content))
return false;
for (int i = 0; i < glossary.size(); i++) {
String word = (String) glossary.get(i);
if(content.indexOf(word)>=0)
return true;
}
return false;
}
/**
* 刪除內(nèi)容中存在的關(guān)鍵字
* @param content
* @return
*/
public static String deleteIllegalWord(String content){
if(StringUtils.isEmpty(content))
return content;
for (int i = 0; i < glossary.size(); i++) {
String word = (String) glossary.get(i);
content = StringUtils.remove(content, word);
}
return content;
}
}
public static void main(String[] args) throws IOException{
init(null);
String text = "中華人民共和國國家主席毛澤東,我們叫他毛主席";
System.out.println(IllegalGlossary.autoGlossaryFiltrate(text));
}
}
這個(gè)類,是從DLOG4J上學(xué)到的。
 sqlDROP DATABASE IF EXISTS `local` ;
CREATE DATABASE `local`;
use `local` ;
DROP TABLE IF EXISTS actionmanager;
CREATE TABLE actionmanager(
actionid INT NOT NULL AUTO_INCREMENT PRIMARY KEY ,
actionName VARCHAR(255) NOT NULL ,
action VARCHAR(255) NOT NULL,
createDate DATE,
viewmode INT DEFAULT 0
#index inx(`action`)
)type=InnoDB;
DROP TABLE IF EXISTS actioncolumn ;
CREATE TABLE actioncolumn(
actioncolumnid INT AUTO_INCREMENT NOT NULL PRIMARY KEY ,
actioncolumnname VARCHAR(255) NOT NULL
)type=InnoDB;
DROP TABLE IF EXISTS groupmanager;
CREATE TABLE groupmanager(
groupid INT AUTO_INCREMENT NOT NULL PRIMARY KEY ,
groupname VARCHAR(255) NOT NULL,
groupinfo VARCHAR(255) DEFAULT NULL,
masterid INT NOT NULL, #who created this group
mastername VARCHAR(255),
createdate DATE
)type=InnoDB;
DROP TABLE IF EXISTS master;
CREATE TABLE master(
id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
name VARCHAR(255) NOT NULL ,
password VARCHAR(255) NOT NULL ,
sex VARCHAR(255) NOT NULL ,
position VARCHAR(255) NOT NULL,
masterid INT , #whoe created this master
mastername VARCHAR(255),
createdate DATE
)type=InnoDB;
DROP TABLE IF EXISTS actiongroup ;
CREATE TABLE actiongroup(
id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
`action` VARCHAR(255) NOT NULL,
groupid INT NOT NULL ,
masterid int NOT NULL,
mastername VARCHAR(255) NOT NULL ,
createdate DATE,
index inx_ag(`action`)
)type=InnoDB;
DROP TABLE IF EXISTS mastergroup ;
CREATE TABLE mastergroup(
id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
masterid INT NOT NULL ,
groupid INT NOT NULL ,
masterid2 INT NOT NULL , # who created or modified this mastergroup
creatDate DATE
)type=InnoDB ;
##############action link group ######################
CREATE INDEX idx_actionmanager_action ON actionmanager(`action`);
CREATE INDEX idx_groupmanager_groupid ON groupmanager(`groupid`);
ALTER TABLE actiongroup
ADD CONSTRAINT fk_action
FOREIGN KEY (action) REFERENCES actionmanager(`action`)
ON DELETE CASCADE ON UPDATE CASCADE;
ALTER TABLE actiongroup
ADD CONSTRAINT fk_groupid
FOREIGN KEY (groupid) REFERENCES groupmanager(`groupid`)
ON DELETE CASCADE ON UPDATE CASCADE;
##############action link master######################
CREATE INDEX idx_master_id ON master(`id`);
ALTER TABLE mastergroup
ADD CONSTRAINT fk_masterg_mid
FOREIGN KEY (masterid) REFERENCES master(`id`)
ON DELETE CASCADE ON UPDATE CASCADE;
ALTER TABLE mastergroup
ADD CONSTRAINT fk_masterg_gid
FOREIGN KEY (groupid) REFERENCES groupmanager(`groupid`)
ON DELETE CASCADE ON UPDATE CASCADE;
1 --創(chuàng)建表
2 if exists(select * from sysobjects where name='user' and type='U') drop table [user] ;
3 create table [user](
4 id int identity(1,1) , --自增字段
5 name varchar(50) ,
6 pwd varchar(50) ,
7 constraint pk_user_id primary key(id) --主鍵
8 --constraint pk_user_id primary key(id,[name])
9 );
10
11 -- 變量的聲明,sql里面聲明變量時(shí)必須在變量前加@符號(hào)
12 DECLARE @I INT
13
14 -- 變量的賦值,變量賦值時(shí)變量前必須加set
15 SET @I = 30
16
17 -- 聲明多個(gè)變量
18 DECLARE @s varchar(10),@a INT
19
20 -- Sql 里if語句
21 IF 條件 BEGIN
22 執(zhí)行語句
23 END
24 ELSE BEGIN
25 執(zhí)行語句
26 END
27
28 DECLARE @d INT
29 set @d = 1
30
31 IF @d = 1 BEGIN
32
33 -- 打印
34 PRINT '正確'
35 END
36 ELSE BEGIN
37 PRINT '錯(cuò)誤'
38 END
39
40
41 -- Sql 里的多條件選擇語句.
42 DECLARE @iRet INT, @PKDisp VARCHAR(20)
43 SET @iRet = 1
44 Select @iRet =
45 CASE
46 WHEN @PKDisp = '一' THEN 1
47 WHEN @PKDisp = '二' THEN 2
48 WHEN @PKDisp = '三' THEN 3
49 WHEN @PKDisp = '四' THEN 4
50 WHEN @PKDisp = '五' THEN 5
51 ELSE 100
52 END
53
54 -- 循環(huán)語句
55 WHILE 條件 BEGIN
56 執(zhí)行語句
57 END
58
59 DECLARE @i INT
60 SET @i = 1
61 WHILE @i<1000000 BEGIN
62 set @i=@i+1
63 END
64 -- 打印
65 PRINT @i
66
67
68 -- TRUNCATE 刪除表中的所有行,而不記錄單個(gè)行刪除操作,不能帶條件
69
70 /*
71 TRUNCATE TABLE 在功能上與不帶 Where 子句的 Delete 語句相同:二者均刪除表中的全部行
72
73 。但 TRUNCATE TABLE 比 Delete 速度快,且使用的系統(tǒng)和事務(wù)日志資源少。
74 Delete 語句每次刪除一行,并在事務(wù)日志中為所刪除的每行記錄一項(xiàng)。TRUNCATE TABLE 通過
75
76 釋放存儲(chǔ)表數(shù)據(jù)所用的數(shù)據(jù)頁來刪除數(shù)據(jù),并且只在事務(wù)日志中記錄頁的釋放。
77 TRUNCATE TABLE 刪除表中的所有行,但表結(jié)構(gòu)及其列、約束、索引等保持不變。新行標(biāo)識(shí)所用
78
79 的計(jì)數(shù)值重置為該列的種子。如果想保留標(biāo)識(shí)計(jì)數(shù)值,請改用 Delete。如果要?jiǎng)h除表定義及其數(shù)據(jù),請
80
81 使用 Drop TABLE 語句。
82 對于由 FOREIGN KEY 約束引用的表,不能使用 TRUNCATE TABLE,而應(yīng)使用不帶 Where 子句的
83
84 Delete 語句。由于 TRUNCATE TABLE 不記錄在日志中,所以它不能激活觸發(fā)器。
85 TRUNCATE TABLE 不能用于參與了索引視圖的表。
86 示例
87 下例刪除 authors 表中的所有數(shù)據(jù)。*/
88
89 TRUNCATE TABLE authors
90
91
92 -- Select INTO 從一個(gè)查詢的計(jì)算結(jié)果中創(chuàng)建一個(gè)新表。 數(shù)據(jù)并不返回給客戶端,這一點(diǎn)和普通的
93 -- Select 不同。 新表的字段具有和 Select 的輸出字段相關(guān)聯(lián)(相同)的名字和數(shù)據(jù)類型。
94
95 select * into NewTable
96 from Uname
97
98
99 -- Insert INTO Select
100 -- 表ABC必須存在
101 -- 把表Uname里面的字段Username復(fù)制到表ABC
102 Insert INTO ABC Select Username FROM Uname
103
104 -- 創(chuàng)建臨時(shí)表
105 Create TABLE #temp(
106 UID int identity(1, 1) PRIMARY KEY,
107 UserName varchar(16),
108 Pwd varchar(50),
109 Age smallint,
110 Sex varchar(6)
111 )
112 -- 打開臨時(shí)表
113 Select * from #temp
114
115 -- 存儲(chǔ)過程
116 -- 要?jiǎng)?chuàng)建存儲(chǔ)過程的數(shù)據(jù)庫
117 Use Test
118 -- 判斷要?jiǎng)?chuàng)建的存儲(chǔ)過程名是否存在
119 if Exists(Select name From sysobjects Where name='csp_AddInfo' And
120
121 type='P')
122 -- 刪除存儲(chǔ)過程
123 Drop Procedure dbo.csp_AddInfo
124 Go
125
126
127 -- 創(chuàng)建存儲(chǔ)過程
128 Create Proc dbo.csp_AddInfo
129 -- 存儲(chǔ)過程參數(shù)
130 @UserName varchar(16),
131 @Pwd varchar(50),
132 @Age smallint,
133 @Sex varchar(6)
134 AS
135 -- 存儲(chǔ)過程語句體
136 insert into Uname (UserName,Pwd,Age,Sex)
137 values (@UserName,@Pwd,@Age,@Sex)
138 RETURN
139 -- 執(zhí)行
140 GO
141
142 -- 執(zhí)行存儲(chǔ)過程
143 EXEC csp_AddInfo 'Junn.A','123456',20,'男';
144 修改自:http://blog.csdn.net/mx1029/archive/2007/07/06/1680910.aspx
1、 ServletFileUpload.isMultipartContent(request) 檢測request中是否包含有multipart內(nèi)容 2、如果有,生成DiskFileItemFactory工廠將進(jìn)行相關(guān)的設(shè)置 DiskFileItemFactory factory = new DiskFileItemFactory(); // maximum size that will be stored in memory factory.setSizeThreshold(maxMemSize); // Location to save data that is larger than maxMemSize. factory.setRepository(new File("d:/")); 3、生成上傳ServletFileUpload類,并將DiskFileFactory工廠傳給它,并對ServletFileUpload進(jìn)行配置 // Create a new file upload handler ServletFileUpload upload = new ServletFileUpload(factory); // maximum file size to be uploaded. upload.setSizeMax(maxFileSize); 4、從request得到上傳的文件列表 // Parse the request to get file items. List fileItems = upload.parseRequest(request); // Process the uploaded file items Iterator i = fileItems.iterator(); 5、處理文件:寫入或者其他操作 while (i.hasNext()) { FileItem fi = (FileItem) i.next(); if (!fi.isFormField()) { // Get the uploaded file parameters String fieldName = fi.getFieldName(); String fileName = fi.getName(); String contentType = fi.getContentType(); boolean isInMemory = fi.isInMemory(); long sizeInBytes = fi.getSize(); // Write the file if (fileName.lastIndexOf("\\") >= 0) { file = new File( filePath + fileName.substring(fileName .lastIndexOf("\\"))); } else { file = new File( filePath + fileName.substring(fileName .lastIndexOf("\\") + 1)); } fi.write(file); out.println("Uploaded Filename: " + fileName + "<br>"); } } } 說明: FileItem接口是對用戶上傳文件的封裝 DiskFileItemFactory實(shí)現(xiàn)了FileItemFactory接口,主要方法有public FileItem createItem(String fieldName, String contentType, boolean isFormField, String fileName) ServletFileUpload從FileUpload繼承,而FileUpload又從FileUploadBase繼承,功能:分析傳入的request對象、得到文件列表FileItemIterator……
簡明步驟 1、下載所需包:commons-FileUpload http://commons.apache.org/fileupload/ 依賴commons-IO包 commons-IO http://commons.apache.org/io/ 2、前端: 3、書寫Servlet 4、web.xml中配置上傳文件存放地址 5、web.xml中配置Servlet 一、前端
<html>
<head>
<title>File Uploading Form</title>
</head>
<body>
<h3>File Upload:</h3>
Select a file to upload: <br />
<form action="UploadServlet" method="post"
enctype="multipart/form-data">
<input type="file" name="file" size="50" />
<br />
<input type="submit" value="Upload File" />
</form>
</body>
</html>
二、書寫Servlet
 web.xml// Import required java libraries
import java.io.*;
import java.util.*;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.output.*;
public class UploadServlet extends HttpServlet {
private boolean isMultipart;
private String filePath;
private int maxFileSize = 50 * 1024;
private int maxMemSize = 4 * 1024;
private File file ;
public void init( ){
// Get the file location where it would be stored.
filePath =
getServletContext().getInitParameter("file-upload");
}
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, java.io.IOException {
// Check that we have a file upload request
isMultipart = ServletFileUpload.isMultipartContent(request);
response.setContentType("text/html");
java.io.PrintWriter out = response.getWriter( );
if( !isMultipart ){
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet upload</title>");
out.println("</head>");
out.println("<body>");
out.println("<p>No file uploaded</p>");
out.println("</body>");
out.println("</html>");
return;
}
DiskFileItemFactory factory = new DiskFileItemFactory();
// maximum size that will be stored in memory
factory.setSizeThreshold(maxMemSize);
// Location to save data that is larger than maxMemSize.
factory.setRepository(new File("c:\\temp"));
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// maximum file size to be uploaded.
upload.setSizeMax( maxFileSize );
try{
// Parse the request to get file items.
List fileItems = upload.parseRequest(request);
// Process the uploaded file items
Iterator i = fileItems.iterator();
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet upload</title>");
out.println("</head>");
out.println("<body>");
while ( i.hasNext () )
{
FileItem fi = (FileItem)i.next();
if ( !fi.isFormField () )
{
// Get the uploaded file parameters
String fieldName = fi.getFieldName();
String fileName = fi.getName();
String contentType = fi.getContentType();
boolean isInMemory = fi.isInMemory();
long sizeInBytes = fi.getSize();
// Write the file
if( fileName.lastIndexOf("\\") >= 0 ){
file = new File( filePath +
fileName.substring( fileName.lastIndexOf("\\"))) ;
}else{
file = new File( filePath +
fileName.substring(fileName.lastIndexOf("\\")+1)) ;
}
fi.write( file ) ;
out.println("Uploaded Filename: " + fileName + "<br>");
}
}
out.println("</body>");
out.println("</html>");
}catch(Exception ex) {
System.out.println(ex);
}
}
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, java.io.IOException {
throw new ServletException("GET method used with " +
getClass( ).getName( )+": POST method required.");
}
}
三、web.xml中配置上傳文件存放地址
 web.xml<web-app>
....
<context-param>
<description>Location to store uploaded file</description>
<param-name>file-upload</param-name>
<param-value>
c:\apache-tomcat-5.5.29\webapps\data\
</param-value>
</context-param>
....
</web-app>
四、web.xml中配置Servlet
 web.xml<servlet>
<servlet-name>UploadServlet</servlet-name>
<servlet-class>UploadServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UploadServlet</servlet-name>
<url-pattern>/UploadServlet</url-pattern>
</servlet-mapping>
原文地址:http://www.tutorialspoint.com/servlets/servlets-file-uploading.htm
一個(gè)Servlet可以通過HTML表單標(biāo)簽將文件上傳到服務(wù)器。支待上傳的有文本、圖像及任何文件。
創(chuàng)建文件上傳表單:
下面的html代碼創(chuàng)建了一個(gè)上傳表單。創(chuàng)建過程需要注意以下幾點(diǎn):
l form標(biāo)簽中的method屬性必須設(shè)置為POST,即GET方法是不可以的。
l form標(biāo)簽中的enctype屬性應(yīng)該設(shè)置為multipart/form-data。
l from標(biāo)簽中的action屬性應(yīng)該與服務(wù)器后臺(tái)的servlet映射路徑相同。接下來的實(shí)例,我們將使用UploadServlet實(shí)現(xiàn)文件上傳。
l 要上傳一個(gè)文件,你應(yīng)該使用一個(gè)<input type=”file”.../>標(biāo)記。要多個(gè)文件上傳,必須包含多個(gè)具有不同的名稱屬性值的<input type=”file”.../>標(biāo)記。The browser associates a Browse button with each of them。
<html>
<head>
<title>File Uploading Form</title>
</head>
<body>
<h3>File Upload:</h3>
Select a file to upload: <br />
<form action="UploadServlet" method="post"
enctype="multipart/form-data">
<input type="file" name="file" size="50" />
<br />
<input type="submit" value="Upload File" />
</form>
</body>
</html>
|
以上代碼將得到以下效果。你可以在本地PC上選擇一個(gè)文件。當(dāng)你點(diǎn)擊“Upload File”,表單將會(huì)隨著你選擇的文件一起被提交。
后臺(tái)servlet:
以下UploadServlet servlet將接收上傳的文件并將其保存入<Tomcat-installation-directory>/webapps/data文件夾。這個(gè)文件夾的名稱可以通過外部配置文件web.xml中的context-param元素內(nèi)容增加。代碼如下:
<web-app>
....
<context-param>
<description>Location to store uploaded file</description>
<param-name>file-upload</param-name>
<param-value>
c:"apache-tomcat-5.5.29"webapps"data"
</param-value>
</context-param>
....
</web-app>
|
以下是實(shí)現(xiàn)了多文件同時(shí)上傳功能的UploadServlet。在此之前您必須確定以下幾點(diǎn):
l 以下實(shí)例依賴F ileUpload類,所以您須將最新版的commons-fileupload.x.x.jar放到您的classpath下。可以從這里下載:http://commons.apache.org/fileupload/。
l FileUpload類依賴于Commons IO包,所以您須將最新版commons-fileupload.x.x.jar放到您的classpath下。可以從這里下載:http://commons.apache.org/io/。
l 在測試以下例子的時(shí)候,您應(yīng)該上傳小于maxFileSize的文件,否則無法上傳。
l 事先確定你已經(jīng)建議好文件夾:c:"temp和c:"apache-tomcat-5.5.29"webapps"data。
// Import required java libraries
import java.io.*;
import java.util.*;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.output.*;
public class UploadServlet extends HttpServlet {
private boolean isMultipart;
private String filePath;
private int maxFileSize = 50 * 1024;
private int maxMemSize = 4 * 1024;
private File file ;
public void init( ){
// Get the file location where it would be stored.
filePath =
getServletContext().getInitParameter("file-upload");
}
public void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, java.io.IOException {
// Check that we have a file upload request
isMultipart = ServletFileUpload.isMultipartContent(request);
response.setContentType("text/html");
java.io.PrintWriter out = response.getWriter( );
if( !isMultipart ){
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet upload</title>");
out.println("</head>");
out.println("<body>");
out.println("<p>No file uploaded</p>");
out.println("</body>");
out.println("</html>");
return;
}
DiskFileItemFactory factory = new DiskFileItemFactory();
// maximum size that will be stored in memory
factory.setSizeThreshold(maxMemSize);
// Location to save data that is larger than maxMemSize.
factory.setRepository(new File("c:""temp"));
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// maximum file size to be uploaded.
upload.setSizeMax( maxFileSize );
try{
// Parse the request to get file items.
List fileItems = upload.parseRequest(request);
// Process the uploaded file items
Iterator i = fileItems.iterator();
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet upload</title>");
out.println("</head>");
out.println("<body>");
while ( i.hasNext () )
{
FileItem fi = (FileItem)i.next();
if ( !fi.isFormField () )
{
// Get the uploaded file parameters
String fieldName = fi.getFieldName();
String fileName = fi.getName();
String contentType = fi.getContentType();
boolean isInMemory = fi.isInMemory();
long sizeInBytes = fi.getSize();
// Write the file
if( fileName.lastIndexOf("""") >= 0 ){
file = new File( filePath +
fileName.substring( fileName.lastIndexOf(""""))) ;
}else{
file = new File( filePath +
fileName.substring(fileName.lastIndexOf("""")+1)) ;
}
fi.write( file ) ;
out.println("Uploaded Filename: " + fileName + "<br>");
}
}
out.println("</body>");
out.println("</html>");
}catch(Exception ex) {
System.out.println(ex);
}
}
public void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, java.io.IOException {
throw new ServletException("GET method used with " +
getClass( ).getName( )+": POST method required.");
}
}
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編譯并運(yùn)行Servlet
編譯以上UploadServlet并在web.xml中創(chuàng)建必須的實(shí)體,如下:
<servlet>
<servlet-name>UploadServlet</servlet-name>
<servlet-class>UploadServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UploadServlet</servlet-name>
<url-pattern>/UploadServlet</url-pattern>
</servlet-mapping>
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現(xiàn)在可以嘗試使用你創(chuàng)建的HTML表單上傳文件。當(dāng)你訪問http://localhost:8080/UploadFile.htm,瀏覽器里將會(huì)顯示如下效果,您可以從本地上傳你想要上傳的任何文件。
如果您的servlet腳本運(yùn)行成功,您的文件上傳在c:"apache-tomcat-5.5.29"webapps"data"directory文件夾。
1、取得系統(tǒng)Properties,并配置 Properties props = System.getProperties(); props.setProperty("mail.transport.protocol", "smtp"); // smtp協(xié)議 props.setProperty("mail.smtp.host", m_server); // 服務(wù)器地址 props.setProperty("mail.smtp.port", "" + m_port); // 端口號(hào) props.setProperty("mail.smtp.auth", "true"); //// 認(rèn)證信息 2、將取得Session javax.mail.Session sess = javax.mail.Session.getDefaultInstance(props); 3、實(shí)例MimeMessage類,然后設(shè)置收件人、主題、發(fā)件日期 MimeMessage msg = new MimeMessage(sess); msg.setFrom(new InternetAddress(m_from)); // 發(fā)件人 msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(m_to)); //收件人 msg.setSubject(m_subject); //主題 msg.setSentDate(new Date()); //發(fā)件日期 4、向MimeMessage中添加文本內(nèi)容及附件 MimeMultipart content = new MimeMultipart();// 文本內(nèi)容 MimeBodyPart part = new MimeBodyPart(); //part還需要加入頭,類型之類的屬性 content.addBodyPart(part); part = new MimeBodyPart(); //這里是加入附件 FileDataSource fds = new FileDataSource(filename); part.setDataHandler(new DataHandler(fds)); part.setFileName(MimeUtility.encodeText(fds.getName())); content.addBodyPart(part); msg.setContent(content); //設(shè)置并保存 msg.saveChanges(); 5、使用Session取得Transport Transport trans = sess.getTransport(); 6、使用Transport連接服務(wù)器 trans.connect(m_server, m_user, m_pass); 7、發(fā)送郵件并關(guān)閉 trans.sendMessage(msg, InternetAddress.parse(m_to)); trans.close();
1、java對象序列化不保存對象中的靜態(tài)變量  serpublic class Test implements Serializable {
private static final long serialVersionUID = 1L;
public static int staticVar = 5;
public static void main(String[] args) {
try {
//初始時(shí)staticVar為5
ObjectOutputStream out = new ObjectOutputStream(
new FileOutputStream("result.obj"));
out.writeObject(new Test());
out.close();
//序列化后修改為10
Test.staticVar = 10;
ObjectInputStream oin = new ObjectInputStream(new FileInputStream(
"result.obj"));
Test t = (Test) oin.readObject();
oin.close();
//再讀取,通過t.staticVar打印新的值
System.out.println(t.staticVar);//10
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
}
2、虛擬機(jī)是否允許反序列化,不僅取決于類路徑和功能代碼是否一致,一個(gè)非常重要的一點(diǎn)是兩個(gè)類的序列化 ID 是否一致(就是 private static final long serialVersionUID = 1L)。
3、父類的序列化與transient關(guān)鍵字
只有子類和父類都實(shí)現(xiàn)了Serializable接口時(shí),對子類反序列化時(shí)才會(huì)將父類也序列化。反序列化過程是先反序列過父類對象再反序列化子類。而如果不想序列化某一個(gè)變量,則可以在定義變量時(shí)使用transient關(guān)鍵字。
 Parentimport java.io.Serializable;
public class Parent implements Serializable {
private static final long serialVersionUID = 1L;
public int pi = 2;
public String pstr ="pstr";
public transient String ts ;
}
 Son and mainimport java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
public class Son extends Parent implements Serializable {
private static final long serialVersionUID = 1L;
public int si = 1;
public String sstr = " sstr";
public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException {
String path = "d:" + File.separator + "son.dll";
Son s = new Son();
s.si = 2;
s.pi = 2;
s.ts = "ts"; // ts在父類中的定義使用transient關(guān)鍵字
ObjectOutputStream op = null;
ObjectInputStream oi = null;
op = new ObjectOutputStream(new FileOutputStream(new File(path)));
op.writeObject(s);
op.close();
oi = new ObjectInputStream(new FileInputStream(path));
Son s1 = (Son) oi.readObject();
System.out.println("父類中的String pstr:" + s1.pstr);
System.out.println("父類中的int pi:" + s1.pi);
System.out.println("子類中的int si:" + s1.si);
System.out.println("父類中的transient String ts :" + s1.ts);//
}
}
4、Java 序列化機(jī)制為了節(jié)省磁盤空間,具有特定的存儲(chǔ)規(guī)則,當(dāng)寫入文件的為同一對象時(shí),并不會(huì)再將對象的內(nèi)容進(jìn)行存儲(chǔ),而只是再次存儲(chǔ)一份引用。
從IBM DW 整理而來
http://www.ibm.com/developerworks/cn/java/j-lo-serial/index.html#icomments
Class.froName(“cc.a.C”) 返回:C這個(gè)類的class(其實(shí)是這個(gè)類的字節(jié)碼) 作用:告訴jvm使用相應(yīng)的加載器,將C.class加載入jvm(至于加載到哪個(gè)位置,本人還不知道) 而Class.forName(“cc.a.C”).newInstance()則是實(shí)例化一個(gè)對象;而new關(guān)鍵的作用也是實(shí)例化一個(gè)對象 所以可以粗略的將這兩種實(shí)例化對象的方法等同。 當(dāng)然它們有不同的地方。 在網(wǎng)上看到別人是這樣區(qū)別的: newInstance: 弱類型。低效率。只能調(diào)用無參構(gòu)造。 new: 強(qiáng)類型。相對高效。能調(diào)用任何public構(gòu)造。
將myeclipes安裝目錄C:\Program Files\Genuitec\Common\plugins 所有的東西復(fù)制到eclipes安裝目錄的\plugins里,并覆蓋。 重新啟動(dòng)eclipes就可以了。
1、比較兩個(gè)對象是否類型相同 array1.getClass().getName().equals(array2.getClass().getName() 2、倒置(reverse)數(shù)組中的元素 int i = 0; int j = array.length - 1; Object tmp; while (j > i) { tmp = array[j]; array[j] = array[i]; array[i] = tmp; j--; i++; } 3、得到數(shù)組的容器類型 array.getClass().getComponentType(); 4、lastIndex()這類方法的實(shí)現(xiàn) for (int i = startIndex; i >= 0; i--) { if (objectToFind.equals(array[i])) { return i; } } 5、isEmpty()這類方法的實(shí)現(xiàn)只要一句話,isNotEmpty方法依此推 return array == null || array.length == 0; 6、將兩個(gè)數(shù)組合并addAll boolean[] joinedArray = new boolean[array1.length + array2.length]; System.arraycopy(array1, 0, joinedArray, 0, array1.length); System.arraycopy(array2, 0, joinedArray, array1.length, array2.length); 7、將新元素加入到數(shù)組中 int arrayLength = Array.getLength(array); Object newArray = Array.newInstance(array.getClass().getComponentType(), arrayLength + 1); System.arraycopy(array, 0, newArray, 0, arrayLength); return newArray; 8、獲得數(shù)組長度的方法 int arrayLength = Array.getLength(array); 9、以反射的方式獲得數(shù)組對象 Array.newInstance(array.getClass().getComponentType(), arrayLength + 1) 10、將某一元素從數(shù)組中移除 Object result = Array.newInstance(array.getClass().getComponentType(), getLength(array)- 1); System.arraycopy(array, 0, result, 0, index); if (index < length - 1) { System.arraycopy(array, index + 1, result, index, length - index - 1); }
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