2011年4月6日
#
StringTokenizer tokenizer
= new StringTokenizer(number, ",");
boolean bool = true;
while (tokenizer.hasMoreTokens()) {
try {
Double.valueOf(tokenizer.nextToken());
} catch (Exception e) {
bool = false;
}
}
//將字符串轉化為數組的方法
int gv[];
int i = 0;
StringTokenizer tokenizer = new StringTokenizer(goodsVolume, "，, ");
gv = new int[tokenizer.countTokens()];//動態的決定數組的長度
while (tokenizer.hasMoreTokens()) {
String d = tokenizer.nextToken();
gv[i] = Integer.valueOf(d);//將字符串轉換為整型
i++;
}
//字符串解析
private String[] stringAnalytical(String str, String divisionChar) {
String string[];
int i = 0;
StringTokenizer tokenizer = new StringTokenizer(str, divisionChar);
string = new String[tokenizer.countTokens()];// 動態的決定數組的長度
while (tokenizer.hasMoreTokens()) {
string[i] = new String();
string[i] = tokenizer.nextToken();
i++;
}
return string;// 返回字符串數組
}
int countTokens()
計算在生成異常之前可以調用此 tokenizer 的 nextToken 方法的次數。
boolean hasMoreElements()
返回與 hasMoreTokens 方法相同的值。
boolean hasMoreTokens()
測試此 tokenizer 的字符串中是否還有更多的可用標記。
Object nextElement()
除了其聲明返回值是 Object 而不是 String 之外，它返回與 nextToken 方法相同的值。
String nextToken()
返回此 string tokenizer 的下一個標記。
String nextToken(String delim)
返回此 string tokenizer 的字符串中的下一個標記。
public class StringAnalytical {
// 字符串解析，將字符串轉根據分割符換成字符串數組
private String[] stringAnalytical(String string, char c) {
int i = 0;
int count = 0;
if (string.indexOf(c) == -1)
return new String[] { string };// 如果不含分割符則返回字符本身
char[] cs = string.toCharArray();
int length = cs.length;
for (i = 1; i < length - 1; i++) {// 過濾掉第一個和最后一個是分隔符的情況
if (cs[i] == c) {
count++;// 得到分隔符的個數
}
}
String[] strArray = new String[count + 1];
int k = 0, j = 0;
String str = string;
if ((k = str.indexOf(c)) == 0)// 去掉第一個字符是分隔符的情況
str = str.substring(k + 1);
if (str.indexOf(c) == -1)// 檢測是否含分隔符，如果不含則返回字符串
return new String[] { str };
while ((k = str.indexOf(c)) != -1) {// 字符串含分割符的時候
strArray[j++] = str.substring(0, k);
str = str.substring(k + 1);
if ((k = str.indexOf(c)) == -1 && str.length() > 0)
strArray[j++] = str.substring(0);
}
return strArray;
}
public void printString(String[] s) {
System.out.println("*********************************");
for (String str : s)
System.out.println(str);
}
public static void main(String[] args) {
String[] str = null;
StringAnalytical string = new StringAnalytical();
str = string.stringAnalytical("1aaa", '@');
string.printString(str);
str = string.stringAnalytical("2aaa@", '@');
string.printString(str);
str = string.stringAnalytical("@3aaa", '@');
string.printString(str);
str = string.stringAnalytical("4aaa@bbb", '@');
string.printString(str);
str = string.stringAnalytical("@5aaa@bbb", '@');
string.printString(str);
str = string.stringAnalytical("6aaa@bbb@", '@');
string.printString(str);
str = string.stringAnalytical("@7aaa@", '@');
string.printString(str);
str = string.stringAnalytical("@8aaa@bbb@", '@');
string.printString(str);
str = string.stringAnalytical("@9aaa@bbb@ccc", '@');
string.printString(str);
str = string.stringAnalytical("@10aaa@bbb@ccc@eee", '@');
string.printString(str);
}
}
摘要: import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar; import java.util.regex.Pattern;
import o...
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java訪問xml文件
- Java code
-
import java.io.*;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class xmljava
{
public static void main(String args[])
{
Element element=null;
File f =new File("a.xml");
DocumentBuilder db=null; //documentBuilder為抽象不能直接實例化(將XML文件轉換為DOM文件)
DocumentBuilderFactory dbf=null;
try{
dbf= DocumentBuilderFactory.newInstance(); //返回documentBuilderFactory對象
db =dbf.newDocumentBuilder();//返回db對象用documentBuilderFatory對象獲得返回documentBuildr對象
Document dt= db.parse(f); //得到一個DOM并返回給document對象
element = dt.getDocumentElement();//得到一個elment根元素
System.out.println("根元素："+element.getNodeName()); //獲得根節點
NodeList childNodes =element.getChildNodes() ; // 獲得根元素下的子節點
for (int i = 0; i < childNodes.getLength(); i++) // 遍歷這些子節點
{
Node node1 = childNodes.item(i); // childNodes.item(i); 獲得每個對應位置i的結點
if ("Account".equals(node1.getNodeName()))
{
// 如果節點的名稱為"Account"，則輸出Account元素屬性type
System.out.println("\r\n找到一篇賬號. 所屬區域: " + node1.getAttributes().getNamedItem ("type").getNodeValue() + ". ");
NodeList nodeDetail = node1.getChildNodes(); // 獲得<Accounts>下的節點
for (int j = 0; j < nodeDetail.getLength(); j++)
{ // 遍歷<Accounts>下的節點
Node detail = nodeDetail.item(j); // 獲得<Accounts>元素每一個節點
if ("code".equals(detail.getNodeName())) // 輸出code
System.out.println("卡號: " + detail.getTextContent());
else if ("pass".equals(detail.getNodeName())) // 輸出pass
System.out.println("密碼: " + detail.getTextContent());
else if ("name".equals(detail.getNodeName())) // 輸出name
System.out.println("姓名: " + detail.getTextContent());
else if ("money".equals(detail.getNodeName())) // 輸出money
System.out.println("余額: "+ detail.getTextContent());
}
}
}
}
catch(Exception e){System.out.println(e);}
}
}
- XML code
-
<?xml version="1.0" encoding="gbk"?>
<Accounts>
<Account type="by0003">
<code>100001</code>
<pass>123</pass>
<name>李四</name>
<money>1000000.00</money>
</Account>
<Account type="hz0001">
<code>100002</code>
<pass>123</pass>
<name>張三</name>
<money>1000.00</money>
</Account>
</Accounts>
2011年1月31日
#
方法沒有確認
import java.util.*;
public class Lottery {
public static void main(String[] args) {
int[] data1 = {3, 5, 6, 8, 9, 15, 18, 24, 27, 30, 32};
Random r = new Random();
int irdm = 0;
for(int i = 0; i < 7; i ++) {
irdm = r.nextInt(11 - i);
System.out.println(data1[irdm]);
for(int j = irdm; j < 11 - i - 1; j ++) {
data1[j] = data1[j + 1];
}
}
}
}
方法沒有確認不知道是否可行public class AAAAA {
public static void main(String[] args) {
int i = 0;
int j = 0;
int[] temp = new int[20];
for (j = 0; j < temp.length; j++) {
temp[j] = Math.random() * 100 + 1;
System.out.print(temp[j] + ","
;
}
HashSet hh = new HashSet();
while (hh.size() < 7) {
int aa = (int) (Math.random() * 100 + 1);
hh.add(aa);
}
System.out.println(hh.size());
Iterator ii = hh.iterator();
while (ii.hasNext()) {
System.out.print(ii.next() + ",";
}
}
}
java從指定數組中取不重復的7個隨機數
如何用java從指定數組中取不重復的7個隨機數，以下是我寫的代碼，但是是有重復的，哪位大俠賜教一下如何使用Random類的種子，幫我實現不重復的隨機數。。。
import java.util.*;
public class Lottery {
public static void main(String[] args)
{
int[] data1 = {3,5,6,8,9,15,18,24,27,30,32};
Random r=new Random();
StringBuffer str1=new StringBuffer();
for(int i=0;i<6;i++)
{
str1.append(data1[r.nextInt(11)]);
}
System.out.println(str1);
}
}
2008年4月24日
#
char []a={'v','f',',','e','f'};
Arrays.sort(a);
for(char b:a)
{
System.out.println(b);
}
2007年9月11日
#
/*
* $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/MVNForumGlobal.java,v 1.17 2005/01/18 11:52:08 minhnn Exp $
* $Author: minhnn $
* $Revision: 1.17 $
* $Date: 2005/01/18 11:52:08 $
*
* ====================================================================
*
* Copyright (C) 2002-2005 by MyVietnam.net
*
* 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 any later version.
*
* All copyright notices regarding mvnForum MUST remain intact
* in the scripts and in the outputted HTML.
* The "powered by" text/logo with a link back to
* http://www.mvnForum.com and http://www.MyVietnam.net in the
* footer of the pages MUST remain visible when the pages
* are viewed on the internet or intranet.
*
* 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 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.
*
* Support can be obtained from support forums at:
* http://www.mvnForum.com/mvnforum/index
*
* Correspondence and Marketing Questions can be sent to:
* info@MyVietnam.net
*
* @author: Minh Nguyen minhnn@MyVietnam.net
* @author: Mai Nguyen mai.nh@MyVietnam.net
*/
package com.mvnforum;
public class MVNForumGlobal {
private MVNForumGlobal() {
}
/*************************************************************************
* NOTE: below constants can be changed for each build,
* these constant MUST NOT break the compatibility
*************************************************************************/
public final static String IMAGE_DIR = "/mvnplugin/mvnforum/images";
public final static String EMOTION_DIR = "/mvnplugin/mvnforum/images/emotion/";
public final static String CSS_FULLPATH = "/mvnplugin/mvnforum/css/style.css";
public final static String LOGO_FULLPATH = "/mvnplugin/mvnforum/images/logo.gif";
// Note that we cannot put / at the end because getRealPath will remove it in Tomcat 4.1.7 :((
public final static String UPLOADED_AVATAR_DIR = "/mvnplugin/mvnforum/upload/memberavatars";
public final static String UPLOADED_COMPANY_DIR = "/mvnplugin/mvnforum/upload/company";
public final static String COMPANY_DEFAULT_CSS_PATH = "/mvnplugin/mvnforum/upload/company/style.css";
public final static String COMPANY_DEFAULT_LOGO_PATH = "/mvnplugin/mvnforum/upload/company/logo.gif";
public final static String RESOURCE_BUNDLE_NAME = "mvnForum_i18n";
/** value to control the flood prevention. Note value from 0 to 999 is belong to mvnCore */
public final static Integer FLOOD_ID_NEW_POST = new Integer(1000);
public final static Integer FLOOD_ID_NEW_MEMBER = new Integer(1001);
public final static Integer FLOOD_ID_LOGIN = new Integer(1002);
public final static Integer FLOOD_ID_NEW_MESSAGE = new Integer(1003);
/** The maximum length of the email in database */
public final static int MAX_MEMBER_EMAIL_LENGTH = 60;
/** The maximum length of the member login name in database */
public final static int MAX_MEMBER_LOGIN_LENGTH = 30;
public final static String TEMPLATE_SENDACTIVATECODE_PREFIX = "sendactivemailtemplate";
public final static String TEMPLATE_SENDACTIVATECODE_SUBJECT = "sendactivemailtemplate-subject.ftl";
public final static String TEMPLATE_SENDACTIVATECODE_BODY = "sendactivemailtemplate-body.ftl";
public final static String TEMPLATE_FORGOTPASSWORD_PREFIX = "forgotpasswordtemplate";
public final static String TEMPLATE_FORGOTPASSWORD_SUBJECT = "forgotpasswordtemplate-subject.ftl";
public final static String TEMPLATE_FORGOTPASSWORD_BODY = "forgotpasswordtemplate-body.ftl";
public final static String TEMPLATE_WATCHMAIL_PREFIX = "watchmailtemplate";
public final static String TEMPLATE_WATCHMAIL_SUBJECT = "watchmailtemplate-subject.ftl";
public final static String TEMPLATE_WATCHMAIL_BODY = "watchmailtemplate-body.ftl";
// Constant for Company module
public final static String COMPANY_GROUP_FREFIX = "CompanyGroup: ";
}
/*
* $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/MVNForumFactoryConfig.java,v 1.12 2005/01/18 11:52:08 minhnn Exp $
* $Author: minhnn $
* $Revision: 1.12 $
* $Date: 2005/01/18 11:52:08 $
*
* ====================================================================
*
* Copyright (C) 2002-2005 by MyVietnam.net
*
* 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 any later version.
*
* All copyright notices regarding mvnForum MUST remain intact
* in the scripts and in the outputted HTML.
* The "powered by" text/logo with a link back to
* http://www.mvnForum.com and http://www.MyVietnam.net in the
* footer of the pages MUST remain visible when the pages
* are viewed on the internet or intranet.
*
* 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 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.
*
* Support can be obtained from support forums at:
* http://www.mvnForum.com/mvnforum/index
*
* Correspondence and Marketing Questions can be sent to:
* info@MyVietnam.net
*
* @author: Luis Miguel Hernanz <luish@germinus.com>
* @author: Minh Nguyen minhnn@MyVietnam.net
*/
package com.mvnforum;
import java.io.File;
import net.myvietnam.mvncore.configuration.DOM4JConfiguration;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import net.myvietnam.mvncore.util.FileUtil;
/**
* Class that loads and makes accesible the factory configuration.
*
* @author <a href="luish@germinus.com">Luis Miguel Hernanz</a>
* @version $Revision: 1.12 $
*/
public class MVNForumFactoryConfig {
private static Log log = LogFactory.getLog(MVNForumFactoryConfig.class);
private static final String OPTION_FILE_NAME = "mvnforum.xml";
private static String authenticatorClassName = null;
private static String memberManagerClassName = "com.mvnforum.db.jdbc.MemberDAOImplJDBC";
private static String onlineUserFactoryClassName = "com.mvnforum.auth.OnlineUserFactoryImpl";
private static String requestProcessorClassName = "com.mvnforum.RequestProcessorDefault";
private static String luceneAnalyzerClassName = "org.apache.lucene.analysis.standard.StandardAnalyzer";
public static String getMemberManagerClassName() {
return memberManagerClassName;
}
public static String getOnlineUserFactoryClassName() {
return onlineUserFactoryClassName;
}
public static String getAuthenticatorClassName() {
return authenticatorClassName;
}
public static String getRequestProcessorClassName() {
return requestProcessorClassName;
}
public static String getLuceneAnalyzerClassName() {
return luceneAnalyzerClassName;
}
static {
try {
String strPathName = FileUtil.getServletClassesPath();
String configFilename = strPathName + OPTION_FILE_NAME;
DOM4JConfiguration conf = new DOM4JConfiguration(new File(configFilename));
memberManagerClassName = conf.getString("mvnforumfactoryconfig.member_implementation", memberManagerClassName);
onlineUserFactoryClassName = conf.getString("mvnforumfactoryconfig.onlineuser_implementation", onlineUserFactoryClassName);
authenticatorClassName = conf.getString("mvnforumfactoryconfig.authenticator_implementation", authenticatorClassName);
requestProcessorClassName = conf.getString("mvnforumfactoryconfig.requestprocessor_implementation", requestProcessorClassName);
luceneAnalyzerClassName = conf.getString("mvnforumfactoryconfig.lucene_analyzer_implementation", luceneAnalyzerClassName);
} catch (Exception e) {
log.error("Error loading the factory properties", e);
}
}
}
/*
* $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/MVNForumContextListener.java,v 1.6 2005/01/18 11:52:08 minhnn Exp $
* $Author: minhnn $
* $Revision: 1.6 $
* $Date: 2005/01/18 11:52:08 $
*
* ====================================================================
*
* Copyright (C) 2002-2005 by MyVietnam.net
*
* 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 any later version.
*
* All copyright notices regarding mvnForum MUST remain intact
* in the scripts and in the outputted HTML.
* The "powered by" text/logo with a link back to
* http://www.mvnForum.com and http://www.MyVietnam.net in the
* footer of the pages MUST remain visible when the pages
* are viewed on the internet or intranet.
*
* 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 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.
*
* Support can be obtained from support forums at:
* http://www.mvnForum.com/mvnforum/index
*
* Correspondence and Marketing Questions can be sent to:
* info@MyVietnam.net
*
* @author: Minh Nguyen minhnn@MyVietnam.net
* @author: Mai Nguyen mai.nh@MyVietnam.net
*/
package com.mvnforum;
import java.sql.Timestamp;
import javax.servlet.*;
import net.myvietnam.mvncore.util.DateUtil;
import net.myvietnam.mvncore.util.FileUtil;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class MVNForumContextListener implements ServletContextListener {
private static Log log = LogFactory.getLog(MVNForumContextListener.class);
private static MVNForumContextListener instance;
private Timestamp startTimestamp;
/**
* The servlet context with which we are associated.
*/
private ServletContext context = null;
public MVNForumContextListener() {
instance = this;
}
/**
* Notification that the web application is ready to process requests.
*
* @param event ServletContextEvent
*/
public void contextInitialized(ServletContextEvent event) {
log.debug("contextInitialized");
this.context = event.getServletContext();
String realPath = context.getRealPath("/WEB-INF/classes");// Add '/' before WEB-INF to fix the Oracle 10G bug
FileUtil.setServletClassesPath(realPath);
startTimestamp = DateUtil.getCurrentGMTTimestamp();
}
/**
* Notification that the servlet context is about to be shut down.
*
* @param event ServletContextEvent
*/
public void contextDestroyed(ServletContextEvent event) {
log.debug("contextDestroyed");
this.context = null;
instance = null;
}
// below are add on method
public static MVNForumContextListener getInstance() {
return instance;
}
public Timestamp getStartTimestamp() {
return startTimestamp;
}
}
/*
* $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/MVNForumConstant.java,v 1.8 2005/01/18 11:52:08 minhnn Exp $
* $Author: minhnn $
* $Revision: 1.8 $
* $Date: 2005/01/18 11:52:08 $
*
* ====================================================================
*
* Copyright (C) 2002-2005 by MyVietnam.net
*
* 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 any later version.
*
* All copyright notices regarding mvnForum MUST remain intact
* in the scripts and in the outputted HTML.
* The "powered by" text/logo with a link back to
* http://www.mvnForum.com and http://www.MyVietnam.net in the
* footer of the pages MUST remain visible when the pages
* are viewed on the internet or intranet.
*
* 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 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.
*
* Support can be obtained from support forums at:
* http://www.mvnForum.com/mvnforum/index
*
* Correspondence and Marketing Questions can be sent to:
* info@MyVietnam.net
*
* @author: Minh Nguyen minhnn@MyVietnam.net
* @author: Mai Nguyen mai.nh@MyVietnam.net
* @author: Igor Manic imanic@users.sourceforge.net
*/
package com.mvnforum;
public final class MVNForumConstant {
/** Cannot instantiate. */
private MVNForumConstant() {
}
/*************************************************************************
* NOTE: below constants MUST NOT be changed IN ALL CASES,
* or it will break the compatibility
*************************************************************************/
/** Guest/anonymous site visitor. */
public static final int MEMBER_ID_OF_GUEST = 0;
/** System administrator. */
public static final int MEMBER_ID_OF_ADMIN = 1;
/**
* The highest reserved MemberID.
* All IDs from 0 through this value should not be used for "regular" members.
*/
public static final int LAST_RESERVED_MEMBER_ID = 1;
/* IMPORTANT: When we have a group without group owner, GroupOwnerID is set to 0.
* Similiar is for other IDs in the database - 0 means there is no reference.
* Also, the other reason why MemberID=0 should not be used for Guest is
* that DBMS could refuse to insert a record with 0 in that field, since it's
* marked as non-null autoincrement primary key.
*/
/** Unused GroupID. */
public static final int GROUP_ID_UNUSED0 = 0;
/**
* Unused GroupID. In the previous versions of mvnForum it was used for some
* special purposes, but should not be used anymore.
*/
public static final int GROUP_ID_OF_GUEST = 1;
/** "Registered Members" virtual group. All members are listed in this group. */
public static final int GROUP_ID_OF_REGISTERED_MEMBERS = 2;
/**
* The highest reserved GroupID.
* All IDs from 0 through this value should not be used for "regular" groups.
*/
public static final int LAST_RESERVED_GROUP_ID = 2;
/** "Inbox" message folder created by default for each member. */
public static final String MESSAGE_FOLDER_INBOX = "Inbox";
/** "Sent" message folder created by default for each member. */
public static final String MESSAGE_FOLDER_SENT = "Sent";
/** "Draft" message folder created by default for each member. */
public static final String MESSAGE_FOLDER_DRAFT = "Draft";
/** "Trash" message folder created by default for each member. */
public static final String MESSAGE_FOLDER_TRASH = "Trash";
public static final String dtdschemaDecl="<!DOCTYPE mvnforum SYSTEM \"http://www.mvnforum.com/dtd/mvnforum_1_0_rc2.dtd\">";
public static final String VN_TYPER_MODE = "mvnforum.vntypermode";
}
摘要: /*
* $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/MVNForumConfig.java,v 1.75 2005/01/29 19:29:26 minhnn Exp $
* $Author: minhnn $
* $Revision: 1.75 $
* $Date: 2005/...
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