引用
蒋委员长 ?如何class打包exe文g
class文g打包exe文g要经q两个步骤：(x)
W一步：(x)class文g打包成jar文gQ请参见我的上一文章：(x)http://maidini.blog.163.com/blog/static/37762704200848910573/
W二步：(x)jar文g打包成exe文g。这是今天的重点
jar打包exe 有许多工P我以exe4jZ详解打包q程Q?BR>W一步：(x)下蝲exe4j,最新版本ؓ(f)4.1 如下?exe4j的官方网?/A>
W二步：(x)q行exe4j.exe 我用的是免安装?zip) 如下?BR>
W三步：(x)q行软gexe4jQ然后点击Next
W四步：(x)选择W二?JAR in EXE mode"Q然后点击Next
W五步：(x)在General中填入名Uͼ在Directories填入生成exe的目录位|。如下图Q我生成exe目录讄为C:\ok Q然后点Next
W六步：(x)Executable name处填入生成exe文g的名UͼIcon File处填写图标文件位|，再点Next
W七步：(x)首先讄Class Path的位|，即jar文g的位|。然后点OK
W八步：(x)接着讄Main-Class 的位|，即mainҎ(gu)所在的位置。然后点OK 如下?BR>
讄完成后，如下图：(x) 一定要先设|Class PathQ再讄Main class
W九(ji)步：(x)填写版本P最好不要填写第二项。否则可能造成错误(见后?Q最后点击Finish卛_
错误内容QNo JVM could be found on your system. Please define EXE4J_JAVA_HOME to point to an installed JDK or JRE or download a JRE from www.java.com
当时出现q个错误Q查看了(jin)JDK和JRE都没有问题，exe4j也是最新版。后来才发现是设|?Maximum version"。如果不填写"Maximum version"Q就不报错。也不知道是不是exe4j的BUG
W十步：(x)完成所有设|，点击“Click Here to Start the Application”可以运行测试生成的EXE文g
生成的最l的EXEE序Q双ȝ接运行。现在可以把自己写的程序发l朋友们玩玩啦，呵呵
文章来源:http://wxq594808632.blog.163.com/blog/static/10907975520093842753860
]]>
引用
蒋委员长 ?如何Class打包Jar文g--Eclipse
开发环境：(x)Eclipse + Win XP SP2
使用插gQFatjar、Jigloo
闲话说Q直接切入正题。首先打开EclipseQ创Z个Java工程。如下图Q我机子上的是JDK1.6
W二步：(x)用Jigloo插g创徏一个窗体，Z(jin)更明显演C我窗体名字修改ؓ(f)“这是一个测试程序”。如下图Q?A>
W三步：(x)现在p运行正常的javaE序打包成jar文g。我使用Fatjar插g打包相当方便、傻瓜。直接右键选择要打包的工程Q弹出的菜单中选择“Build Fat Jar”。如下图Q?BR>
W四步：(x)弹出对话框，需要将引导路径修改Q其他选项使用默认讄Q然后点击Finish?SPAN style="COLOR: rgb(255,0,0)">“Main-Class”这修改ؓ(f)MainҎ(gu)所在的文g。此步不可缺，否则打包的Jar文g双击不可q行?/SPAN>
E等一下，打包成功如下图Q出C个testexe_fat.jar文g?BR>
q入工程所在的目录也可以看C个testexe_fat.jar文gQ双dQ就q行?jin)。如果无误应该弹出像?的界?/A>。如下图:
选择jar文g右键Q点击open。相当于双击jar文g如下?
ȝQ打包Jar文g是将分散Class文gl一装的好办法。双击运行速度与没打包前运行速度没有区别。打包一定要讄好Main-Class的\径，否则JVM找不到入口程序?BR>
如果不知道如何在Eclipse中安装插Ӟ请参见我的另一文章：(x)http://maidini.blog.163.com/blog/static/37762704200832671334860/
文章来源:http://wxq594808632.blog.163.com/blog/static/1090797552009384273607
]]>
如题Q废话不多说?/P>
JSP面
hello.jsp
<%@ page contentType="text/html; charset=GBK" %>
<html>
<head>
<title>AJAX提交面</title>
<meta http-equiv="Content-Type" content="text/html; charset=gbk">
<script type="text/javascript" src="ajax.js"></script>
<script type="text/javascript">
function doso(){
var url = "actAction.do";
var s="武晓强斯蒂芬34-*(&_(*!$^_*!&#!^$+!*#&&";
s=encodeURIComponent(s); //转换Ҏ(gu)字符
var parameter ="name="+s+"&email=abc@abc.com&www=http://wxq594808632.blog.163.com/";
var method = "POST";
function callBack(text){ //回调函数
alert("调用成功!\n名字?"+text);
}
new Ajax().ajaxRequest(url,parameter,method,callBack); //调用Ҏ(gu)发送Request
}
</script>
</head>
<body>
<input type="button" value="提交" onclick="doso()"/>
</body>
</html>
javac?/FONT>
ActAction.java
package ajaxpost;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.Action;
import java.io.UnsupportedEncodingException;
import java.io.IOException;
import java.io.PrintWriter;
public class ActAction extends Action {
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws
UnsupportedEncodingException {
//讄字符~码q回的编?BR> response.setContentType("text/html;charset=UTF-8");
//接收字符的编?BR> try {
request.setCharacterEncoding("UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
PrintWriter out = null;
try {
out = response.getWriter();
} catch (IOException ex) {
ex.printStackTrace();
}
String name = request.getParameter("name");
String email = request.getParameter("email");
String www = request.getParameter("www");
System.out.println(email);
System.out.println(name);
System.out.println(www);
// out.print(name+"\n"+email+"\n"+www);
out.print(name); //q回?/FONT>
return null;
}
}
最重要?/FONT>
ajax.js
我用别h的。感谢这位大哥。?/P>
/*
author zhangshuling
email zhangshuling1214@126.com
*/
function Ajax(){
var _xmlHttp = null;
this.createXMLHttpRequest = function(){
try{
if (window.ActiveXObject) {
_xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if (window.XMLHttpRequest) {
_xmlHttp = new XMLHttpRequest();
}
}catch(e){
alert(e.name +" : " + e.message);
}
}
this.backFunction = function(_backFunction){
if(_xmlHttp.readyState == 4) {
if(_xmlHttp.status == 200) {
_backFunction(_xmlHttp.responseText);//q里可以讄q回cd
}
}
_xmlHttp.onreadystatechange = null;
}
this.doPost = function(_url,_parameter,_backFunction){
try{
_xmlHttp.open("POST",_url, false);
_xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
_xmlHttp.send(_parameter);
}catch(e){
alert(e.name +" : " + e.message);
}
}
this.doGet = function(_url,_parameter,_backFunction){
try{
var _random = Math.round(Math.random()*10000);
_xmlHttp.open("GET", (_url+"?random=" +_random +"&" + _parameter), false);
_xmlHttp.send(null);
}catch(e){
alert(e.name +" : " + e.message);
}
}
this.ajaxRequest = function(_url,_parameter,_method,_backFunction){
try{
this.createXMLHttpRequest();
if(_method.toLowerCase() == "post"){
this.doPost(_url,_parameter,_backFunction);
}else{
this.doGet(_url,_parameter,_backFunction);
}
try{
_xmlHttp.onreadystatechange = this.backFunction(_backFunction);
}catch(err){
//??????IE?????????????????
}
}catch(e){
alert(e.name +" : " + e.message);
}
}
}
/*
var url = "ajax.do";
var parameter = "parameter=parameter";
var method = "post"
function callBack(text){
....
}
new Ajax().ajaxRequest(url,parameter,method,callBack);
*/
l过本hFFQIE6QIE7Q测试。完全好?/P>
文章来源:http://wxq594808632.blog.163.com/blog/static/109079755200923121054225
import java.io.IOException;
import java.awt.image.BufferedImage;
import java.net.URL;
import java.io.BufferedInputStream;
import java.io.OutputStream;
import java.io.FileOutputStream;
import java.io.File;
import javax.imageio.ImageIO;
public class Img2 {
//dq程url囄,得到宽高
public int[] returnImgWH(String imgurl) {
boolean b=false;
try {
//实例化url
URL url = new URL(imgurl);
//载入囄到输入流
java.io.BufferedInputStream bis = new BufferedInputStream(url.openStream());
//实例化存储字节数l?BR> byte[] bytes = new byte[100];
//讄写入路径以及(qing)囄名称
OutputStream bos = new FileOutputStream(new File( "C:\\thetempimg.gif"));
int len;
while ((len = bis.read(bytes)) > 0) {
bos.write(bytes, 0, len);
}
bis.close();
bos.flush();
bos.close();
//关闭输出?BR> b=true;
} catch (Exception e) {
//如果囄未找?BR> b=false;
}
int[] a = new int[2];
if(b){ //囄存在
//得到文g
java.io.File file = new java.io.File("C:\\thetempimg.gif");
BufferedImage bi = null;
try {
//d囄
bi = javax.imageio.ImageIO.read(file);
} catch (IOException ex) {
ex.printStackTrace();
}
a[0] = bi.getWidth(); //获得 宽度
a[1] = bi.getHeight(); //获得 高度
//删除文g
file.delete();
}else{ //囄不存?/FONT>
a=null;
}
return a;
}
public static void main(String[] args) {
Img2 i = new Img2();
int[] a=i.returnImgWH(" if(a==null){
System.out.println("囄未找?");
}else{
System.out.println("宽ؓ(f)" + a[0]);
System.out.println("高ؓ(f)" + a[1]);
}
}
}
文章来源:http://wxq594808632.blog.163.com/blog/static/10907975520092274458465
]]>
function jsTrim(value)
{
var reg=/^\S$/;
if (!value) return "";
if(value.length==0)
return value;
else
{
var lp,rp;
lp=0;rp=value.length-1;
while ((value.charAt(lp)==" "||(value.charCodeAt(lp)<128?(reg.test(value.charAt(lp))==false?true:false):false)||value.charAt(rp)==" "||(value.charCodeAt(rp)<128?(reg.test(value.charAt(rp))==false?true:false):false))&&rp>=lp)
{
if (value.charAt(lp)==" "||value.charCodeAt(lp)<128?(reg.test(value.charAt(lp))==false?true:false):false)
lp++;
if (value.charAt(rp)==" "||value.charCodeAt(rp)<128?(reg.test(value.charAt(rp))==false?true:false):false)
rp--;
}
if(lp>rp)
return "";
else
return (value.substring(lp,rp+1));
}
}
文章来源:http://wxq594808632.blog.163.com/blog/static/10907975520092205931780
]]>
引用
邉|L的空?/A> ?如何防止同一个̎戯多个人同时登?
1.用session时,session为nullpCZU了(jin)
2.也可以采用数据库中设|? 临时? 来处?
一个用L(fng)陆时向表中插q一条记录，用户d时候删除该记录
如想l计在线人数Q简单地执行
select count(*) from table... 卛_
3.application对象中可以记住现在的人数Qapplication的生命周期和服务器的生命周期一样长?
4.q有一U方法要用到一个文件global.jsa Q方法是Q在JSP中）(j)是sessionDestroy(),其中它是以session对象为参数的。还有要把global.jsa文g必须房子和JSP E序 相同的文件目录内才行?
5.|页自动h的代码是Q?
在文件头部加?
<meta http-equiv="refresh" content="15">
h间隔旉?5U?
6.在session中加入监听类,cȝCZ代码如下:onLineUser.java-------------------------------------------------------------------------------------------
package com.shaobo.struts.action;
import javax.servlet.http.*;
import javax.servlet.*;
import java.util.*;public class onLineUser implements HttpSessionBindingListener {
public onLineUser() {
}private Vector users = new Vector();
public int getCount() {
users.trimToSize();
return users.capacity();
}public boolean existUser(String userName) {
users.trimToSize();
boolean existUser = false;
for (int i = 0; i < users.capacity(); i++) {
if (userName.equals((String) users.get(i))) {
existUser = true;
break;
}
}
return existUser;
}public boolean deleteUser(String userName) {
users.trimToSize();
if (existUser(userName)) {
int currUserIndex = -1;
for (int i = 0; i < users.capacity(); i++) {
if (userName.equals((String) users.get(i))) {
currUserIndex = i;
break;
}
}
if (currUserIndex != -1) {
users.remove(currUserIndex);
users.trimToSize();
return true;
}
}
return false;
}public Vector getOnLineUser() {
return users;
}public void valueBound(HttpSessionBindingEvent e) {
users.trimToSize();
if (!existUser(e.getName())) {
users.add(e.getName());
System.out.print(e.getName() + "\td到系l\t"
+ (new Date()));
System.out.println("在线用户Cؓ(f)Q? + getCount());
} else
System.out.println(e.getName() + "已经存在");
}public void valueUnbound(HttpSessionBindingEvent e) {
users.trimToSize();
String userName = e.getName();
deleteUser(userName);
System.out.print(userName + "\t退出系l\t" + (new Date()));
System.out.println("在线用户Cؓ(f)Q? + getCount());
}
}login.jsp--------------------------------------------------------------------------------------------
<%@ page language="java" import="java.util.*" pageEncoding="GBK"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%><jsp:useBean id="onlineuser" class="com.shaobo.struts.action.onLineUser"
scope="application" />
<html>
<head>
</head>
<body onUnload="postMessage()">
<center>
<p>
<h1>
登陆成功Q欢q访?BR> </h1>
</p>
</center>
<%
session = request.getSession(false);
%>
<%
String username = request.getParameter("username");
if (onlineuser.existUser(username)) {
out.println("用户<font color=red>" + username
+ "</font>已经登陆Q?);
} else {
session.setMaxInactiveInterval(50); //Sesion有效旉Q以Uؓ(f)单位
session.setAttribute(username, onlineuser);
out.println("Ƣ迎新用?<font color=red>" + username
+ "</font>登陆到系l！");
}
out.println("<br>当前在线用户人数:<font color=red>"
+ onlineuser.getCount() + "</font><br>");
String ip = request.getRemoteAddr();
out.println("<br>IP:<font color=red>" + ip + "</font><br>");
Vector vt = onlineuser.getOnLineUser();
Enumeration e = vt.elements();
out.println("在线用户列表");
out.println("<table border=1>");
out.println("<tr><td>用户?lt;/td></tr>");
while (e.hasMoreElements()) {
out.println("<tr><td>");
out.println((String) e.nextElement() + "<br>");
out.println("</td></tr>");
}
out.println("</table>");
%>
<center>
<p>
</p>
[
<a href="javascript:window.close()">关闭H口</a>]
<%
out.println("<p><a href='index.jsp'>退出系l?lt;/a></p>");
%>
</center>
<Script>
function postMessage(){
<%onlineuser.deleteUser(request.getParameter("username"));%>
}
</Script>
</body>
</html>Ƣ迎光(f)邉|L的空间` http://blog.sina.com.cn/shaobolive
QQ:343269876
文章来源:http://wxq594808632.blog.163.com/blog/static/10907975520092191192874
]]>
/** *//**获得控制台用戯入的信息
* @return
* @throws IOException
*/
public String getInputMessage() throws IOException...{
System.out.println("误入?zhn)的命令?);
byte buffer[]=new byte[1024];
int count=System.in.read(buffer);
char[] ch=new char[count-2];//最后两位ؓ(f)l束W，删去不要
for(int i=0;i<count-2;i++)
ch[i]=(char)buffer[i];
String str=new String(ch);
return str;
}
可以q回用户输入的信息，不之处在于不支持中文输入，有待q一步改q?
?复制文g
1.以文件流的方式复制文?
/** *//**以文件流的方式复制文?
* @param src 文g源目?
* @param dest 文g目的目录
* @throws IOException
*/
public void copyFile(String src,String dest) throws IOException...{
FileInputStream in=new FileInputStream(src);
File file=new File(dest);
if(!file.exists())
file.createNewFile();
FileOutputStream out=new FileOutputStream(file);
int c;
byte buffer[]=new byte[1024];
while((c=in.read(buffer))!=-1)...{
for(int i=0;i<c;i++)
out.write(buffer[i]);
}
in.close();
out.close();
}
该方法经q测试，支持中文处理Qƈ且可以复制多U类型，比如txtQxmlQjpgQdoc{多U格?
?写文?
1.利用PrintStream写文?
/** *//**
* 文g输出CZ
*/
public void PrintStreamDemo()...{
try ...{
FileOutputStream out=new FileOutputStream("D:/test.txt");
PrintStream p=new PrintStream(out);
for(int i=0;i<10;i++)
p.println("This is "+i+" line");
} catch (FileNotFoundException e) ...{
e.printStackTrace();
}
}
2.利用StringBuffer写文?
public void StringBufferDemo() throws IOException......{
File file=new File("/root/sms.log");
if(!file.exists())
file.createNewFile();
FileOutputStream out=new FileOutputStream(file,true);
for(int i=0;i<10000;i++)......{
StringBuffer sb=new StringBuffer();
sb.append("q是W?+i+"?前面介绍的各U方法都不关?Z么L奇怪的问题 ");
out.write(sb.toString().getBytes("utf-8"));
}
out.close();
}
该方法可以设定用何U编码，有效解决中文问题?
?文g重命?
/** *//**文g重命?
* @param path 文g目录
* @param oldname 原来的文件名
* @param newname 新文件名
*/
public void renameFile(String path,String oldname,String newname)...{
if(!oldname.equals(newname))...{//新的文g名和以前文g名不同时,才有必要q行重命?
File oldfile=new File(path+"/"+oldname);
File newfile=new File(path+"/"+newname);
if(newfile.exists())//若在该目录下已经有一个文件和新文件名相同Q则不允?dng)R命名
System.out.println(newname+"已经存在Q?);
else...{
oldfile.renameTo(newfile);
}
}
}?转移文g目录
转移文g目录不等同于复制文gQ复制文件是复制后两个目录都存在该文Ӟ而{UL件目录则是{UdQ只有新目录中存在该文g?
/** *//**转移文g目录
* @param filename 文g?
* @param oldpath 旧目?
* @param newpath 新目?
* @param cover 若新目录下存在和转移文gh相同文g名的文gӞ是否覆盖新目录下文gQcover=true会(x)覆盖原文Ӟ否则不操?
*/
public void changeDirectory(String filename,String oldpath,String newpath,boolean cover)...{
if(!oldpath.equals(newpath))...{
File oldfile=new File(oldpath+"/"+filename);
File newfile=new File(newpath+"/"+filename);
if(newfile.exists())...{//若在待{Uȝ录下Q已l存在待转移文g
if(cover)//覆盖
oldfile.renameTo(newfile);
else
System.out.println("在新目录下已l存在：(x)"+filename);
}
else...{
oldfile.renameTo(newfile);
}
}
}
?L?
1.利用FileInputStreamd文g
/** *//**L?
* @param path
* @return
* @throws IOException
*/
public String FileInputStreamDemo(String path) throws IOException...{
File file=new File(path);
if(!file.exists()||file.isDirectory())
throw new FileNotFoundException();
FileInputStream fis=new FileInputStream(file);
byte[] buf = new byte[1024];
StringBuffer sb=new StringBuffer();
while((fis.read(buf))!=-1)...{
sb.append(new String(buf));
buf=new byte[1024];//重新生成Q避免和上次d的数据重?
}
return sb.toString();
}
2.利用BufferedReaderd
在IO操作Q利用BufferedReader和BufferedWriter效率?x)更高一?
/** *//**L?
* @param path
* @return
* @throws IOException
*/
public String BufferedReaderDemo(String path) throws IOException...{
File file=new File(path);
if(!file.exists()||file.isDirectory())
throw new FileNotFoundException();
BufferedReader br=new BufferedReader(new FileReader(file));
String temp=null;
StringBuffer sb=new StringBuffer();
temp=br.readLine();
while(temp!=null)...{
sb.append(temp+" ");
temp=br.readLine();
}
return sb.toString();
}
3.利用dom4jdxml文g
/** *//**从目录中dxml文g
* @param path 文g目录
* @return
* @throws DocumentException
* @throws IOException
*/
public Document readXml(String path) throws DocumentException, IOException...{
File file=new File(path);
BufferedReader bufferedreader = new BufferedReader(new FileReader(file));
SAXReader saxreader = new SAXReader();
Document document = (Document)saxreader.read(bufferedreader);
bufferedreader.close();
return document;
}
?创徏文g(文g?
1.创徏文g?nbsp; /** *//**创徏文g?
* @param path 目录
*/
public void createDir(String path)...{
File dir=new File(path);
if(!dir.exists())
dir.mkdir();
}
2.创徏新文?/** *//**创徏新文?
* @param path 目录
* @param filename 文g?
* @throws IOException
*/
public void createFile(String path,String filename) throws IOException...{
File file=new File(path+"/"+filename);
if(!file.exists())
file.createNewFile();
}
?删除文g(目录)
1.删除文g /** *//**删除文g
* @param path 目录
* @param filename 文g?
*/
public void delFile(String path,String filename)...{
File file=new File(path+"/"+filename);
if(file.exists()&&file.isFile())
file.delete();
}
2.删除目录
要利用Filecȝdelete()Ҏ(gu)删除目录Ӟ必须保证该目录下没有文g或者子目录Q否则删除失败，因此在实际应用中Q我们要删除目录Q必d用递归删除该目录下的所有子目录和文Ӟ然后再删除该目录?nbsp; /** *//**递归删除文g?
* @param path
*/
public void delDir(String path)...{
File dir=new File(path);
if(dir.exists())...{
File[] tmp=dir.listFiles();
for(int i=0;i<tmp.length;i++)...{
if(tmp[i].isDirectory())...{
delDir(path+"/"+tmp[i].getName());
}
else...{
tmp[i].delete();
}
}
dir.delete();
}
}
文章来源:http://wxq594808632.blog.163.com/blog/static/109079755200921911749952
]]>