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Mon, 17 Nov 2008 15:09:00 GMT

徐辛�?/a> 2008-11-17 23:09 发表评论

Fri, 31 Oct 2008 13:00:00 GMT

徐辛波，西安�Q�从事��Y件开发设计工作，熟�?zh��n)�Java语言�Q�爱好开发工作，特别是java相关的编�E�，业余��x(ch��ng)��开源项目，诚心(j��)�l�识志同道合之士�l�徏开源团队，共同学习(f��n)、进步、协作、�ؓ(f��)中国开源事业�A(ch��)献微薄之力�?

徐辛�?sinpo.xu@gmail.com

徐辛�?/a> 2008-10-31 21:00 发表评论

JDOM常用�c�M��l�及(qi��ng)�C�Z��代码

Sat, 25 Oct 2008 13:02:00 GMT

JDOM

Document

developer

sinpo.xu@hotmail.com

15029357227

02985457683

15029357227Element element = new Element("name");

Text text = new Text("AAA.<

element.addContent(text);

org.w3c.dom.Document

package sinpo.usagedemo;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.List;

import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import org.jdom.output.Format;
import org.jdom.output.XMLOutputter;

/**
 * ��d��配置文�g�Q��ƈ且修改后�?qi��ng)时同步到磁�?/font>
 * @author 徐辛�?sinpo.xu@hotmail.com) 
 * Oct 23, 2008
 */
public class Configuration {

    private Element root = null;

    private Document dom = null;

    private static final String resourceName = "/config.xml";

    private static Configuration _INSTANCE = null;

    public static synchronized Configuration getInstance() {
        if (_INSTANCE == null) {
            _INSTANCE = new Configuration();
        }

        return _INSTANCE;
    }

    private Configuration() {
        load();
    }

    public String getConfig(String configName) {
        String configValue = null;
        Element found = findRecursively(configName, root);
        if (found != null) {
            configValue = found.getText();
        }
        return configValue;
    }

    public void updateConfig(String configName, String newValue)
            throws IOException {
        Element found = findRecursively(configName, root);
        if (found != null) {
            found.setText(newValue);
        } else {
            Element configNode = new Element(configName);
            configNode.addContent(newValue);
            // also: configNode.setText(newValue);
            root.addContent(configNode);
        }
        sync();
    }

    public void deleteConfig(String configName) throws IOException {
        Element found = findRecursively(configName, root);
        if (found != null) {
            found.detach();
        }
        sync();
    }
    
    private void load() {
        SAXBuilder builder = new SAXBuilder();
        InputStream source = getClass().getResourceAsStream(resourceName);
        try {
            dom = builder.build(source);
            root = dom.getRootElement();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // 递归查找. 在指定的父节点下查找叶子元素
    private Element findRecursively(String name, Element parent) {
        Element found = null;
        List children = parent.getChildren();
        if (children != null) {
            for (int i = 0; i < children.size(); i++) {
                Element element = children.get(i);
                String tmpName = element.getName();
                if ((name.equals(tmpName)) && (!hasChild(element))) {
                    return element;
                }
            }

            for (int i = 0; i < children.size(); i++) {
                Element element = children.get(i);
                if (hasChild(element)) {
                    found = findRecursively(name, element);
                    if (found != null) {
                        return found;
                    }
                }
            }
        }

        return found;
    }

    private boolean hasChild(Element element) {
        boolean hasChild = false;
        List children = element.getChildren();
        if ((children != null) && (children.size() > 0)) {
            hasChild = true;
        }

        return hasChild;
    }

    private void sync() throws IOException {
        Format format = Format.getPrettyFormat();
        XMLOutputter outputter = new XMLOutputter(format);
        File file = null;
        URL url = getClass().getResource(resourceName);
        if (url == null) {
            file = new File(resourceName);
        } else {
            file = new File(url.getPath());

            OutputStream out = null;
            try {
                out = new FileOutputStream(file);
                outputter.output(dom, out);
                out.close();
                out = null;
            } catch (Exception e) {
                e.printStackTrace();
                if (out != null) {
                    out.close();
                }
            }
        }
    }
}

��վ֩��ģ�壺 ��| ��| ��| ��| ɽ��ʡ| �Ͽ��| �ᶫ��| �°Ͷ��| �ٰ��| ��ʡ| ��| ��| ��| ��| ��Ϫ��| �Ͻ��| ��| �˿��| ��| ΢��| Ӣ��ɳ��| ��| �ζ��| ��| ��ƺ��| ��| ��| ��ɽ��| ��Ϫ��| ��| �̷��| ��| ��Ϸ| ��| ��| ��| ��| ��| ��| ��| ��|

徐辛�?/a> 2008-10-25 21:02 发表评论

也谈�U�程的休眠与�{�待

Wed, 22 Oct 2008 15:26:00 GMT

synchronized


            
            package 
            
            sinpo.usagedemo;
            

            
            
            

            /**
            

             
            * 该例子说明线�E�休眠与�{�待以及(qi��ng)注意事项�?/font>
            

             
            * 
            

             
            * 
            @author 
            徐辛�?sinpo.xu@hotmail.com) 
            

             
            * Oct 22, 2008
            

             
            */
            

            
            public class 
            
            PendingThreadDemo 
            {
            

                
            
            public 
            
            Console console = 
            
            new 
            
            Console
            ()
            ;
            

                
            
            private 
            
            
            void 
            
            writeToConsole1
            () {
            

                    
            
            synchronized
            
            (
            console
            ){
            

                        
            
            try 
            
            {
            

                            
            Thread.sleep
            (
            1 
            * 
            1000
            )
            ;
            //NOTE:sleep时�ƈ未释放console别的�U�程是不能锁定console�?/font>
            

                            
            //TODO do things
            

                        
            } 
            
            catch 
            
            (
            InterruptedException e
            ) {
            

                            
            e.printStackTrace
            ()
            ;
            

                        
            }
            

                    
            }
            

                
            }
            

                
            

                
            
            private 
            
            
            void 
            
            writeToConsole2
            () {
            

                    
            
            synchronized
            
            (
            console
            ){
            

                        
            
            try 
            
            {
            

                            
            console.wait
            (
            1
            *
            1000
            )
            ;
            //NOTE:wait时别的线�E�是可以锁定console�?/font>
            

                            
            //TODO do things
            

                        
            } 
            
            catch 
            
            (
            InterruptedException e
            ) {
            

                            
            e.printStackTrace
            ()
            ;
            

                        
            }
            

                    
            }
            

                
            }
            

            }
            

            //控制台类
            

            
            class 
            
            Console 
            {
            

                
            //TODO implements me
            

            }

徐辛�?/a> 2008-10-22 23:26 发表评论

求助�Q�怎么贴代码才能保持代码的格式呀

Mon, 20 Oct 2008 14:42:00 GMT

�ȝ��(ch��)有谁知道的告知一下。。�?/span>
今天�l�于扑ֈ�一个不错的工具�Q�能��用eclipse�{�编辑的java代码做成一样风格的html格式�Q�试用了(ji��n)挺好用的�Q�谢�?a >Java2Html团队�?

徐辛�?/a> 2008-10-20 22:42 发表评论

Mon, 20 Oct 2008 14:38:00 GMT

NIO


            
            package 
            
            sinpo.usagedemo;
            

            
            
            

            
            import 
            
            java.net.DatagramSocket;
            

            
            import 
            
            java.net.InetSocketAddress;
            

            
            import 
            
            java.net.SocketAddress;
            

            
            import 
            
            java.nio.ByteBuffer;
            

            
            import 
            
            java.nio.CharBuffer;
            

            
            import 
            
            java.nio.channels.DatagramChannel;
            

            
            import 
            
            java.nio.channels.SelectionKey;
            

            
            import 
            
            java.nio.channels.Selector;
            

            
            import 
            
            java.nio.charset.Charset;
            

            
            import 
            
            java.util.Iterator;
            

            
            import 
            
            java.util.Set;
            

            
            
            

            /**
            

            
            
            * 
            @author 
            徐辛�?sinpo.xu@hotmail.com) Oct 19, 2008
            

            
            
            */
            

            
            public class 
            
            UDPServer 
            
            extends 
            
            Thread 
            {
            

            
            
            
            public 
            
            
            void 
            
            run
            () {
            

            
            
            Selector selector = 
            
            null
            
            ;
            

            
            
            
            try 
            
            {
            

            
            
            DatagramChannel channel = DatagramChannel.open
            ()
            ;
            

            
            
            DatagramSocket socket = channel.socket
            ()
            ;
            

            
            
            channel.configureBlocking
            (
            
            false
            
            )
            ;
            

            
            
            socket.bind
            (
            
            new 
            
            InetSocketAddress
            (
            5057
            ))
            ;
            

            
            
            

            
            
            selector = Selector.open
            ()
            ;
            

            
            
            channel.register
            (
            selector, SelectionKey.OP_READ
            )
            ;
            

            
            
            } 
            
            catch 
            
            (
            Exception e
            ) {
            

            
            
            e.printStackTrace
            ()
            ;
            

            
            
            }
            

            
            
            

            
            
            ByteBuffer byteBuffer = ByteBuffer.allocate
            (
            65536
            )
            ;
            

            
            
            
            while 
            
            (
            
            true
            
            ) {
            

            
            
            
            try 
            
            {
            

            
            
            
            int 
            
            eventsCount = selector.select
            ()
            ;
            

            
            
            
            if 
            
            (
            eventsCount > 
            0
            ) {
            

            
            
            Set selectedKeys = selector.selectedKeys
            ()
            ;
            

            
            
            Iterator iterator = selectedKeys.iterator
            ()
            ;
            

            
            
            
            while 
            
            (
            iterator.hasNext
            ()) {
            

            
            
            SelectionKey sk = 
            (
            SelectionKey
            ) 
            iterator.next
            ()
            ;
            

            
            
            iterator.remove
            ()
            ;
            

            
            
            
            if 
            
            (
            sk.isReadable
            ()) {
            

            
            
            DatagramChannel datagramChannel = 
            (
            DatagramChannel
            ) 
            sk
            

            
            
            .channel
            ()
            ;
            

            
            
            SocketAddress sa = datagramChannel
            

            
            
            .receive
            (
            byteBuffer
            )
            ;
            

            
            
            byteBuffer.flip
            ()
            ;
            

            
            
            

            
            
            // ���试�Q�通过���收到的ByteBuffer首先通过�~�省的编码解码成CharBuffer 再输�?/font>
            

            
            
            CharBuffer charBuffer = Charset.defaultCharset
            ()
            

            
            
            .decode
            (
            byteBuffer
            )
            ;
            

            
            
            System.out.println
            (
            "receive message:"
            

            
            
            + charBuffer.toString
            ())
            ;
            

            
            
            byteBuffer.clear
            ()
            ;
            

            
            
            

            
            
            String echo = 
            "This is the reply message from 服务器�?
            ;
            

            
            
            ByteBuffer buffer = Charset.defaultCharset
            ()
            

            
            
            .encode
            (
            echo
            )
            ;
            

            
            
            datagramChannel.write
            (
            buffer
            )
            ;
            

            
            
            }
            

            
            
            }
            

            
            
            }
            

            
            
            } 
            
            catch 
            
            (
            Exception e
            ) {
            

            
            
            e.printStackTrace
            ()
            ;
            

            
            
            }
            

            
            
            }
            

            
            
            

            
            
            }
            

            
            
            

            
            
            
            public static 
            
            
            void 
            
            main
            (
            String
            [] 
            args
            ) {
            

            
            
            
            new 
            
            UDPServer
            ()
            .start
            ()
            ;
            

            
            
            }
            

            }

Client


            
            package 
            
            sinpo.usagedemo;
            

            
            
            

            
            import 
            
            java.net.InetSocketAddress;
            

            
            import 
            
            java.net.SocketAddress;
            

            
            import 
            
            java.nio.ByteBuffer;
            

            
            import 
            
            java.nio.channels.DatagramChannel;
            

            
            import 
            
            java.nio.channels.SelectionKey;
            

            
            import 
            
            java.nio.channels.Selector;
            

            
            import 
            
            java.nio.charset.Charset;
            

            
            import 
            
            java.util.Iterator;
            

            
            import 
            
            java.util.Set;
            

            
            
            

            /**
            

             
            * 
            @author 
            徐辛�?sinpo.xu@hotmail.com)
            

             
            * Oct 19, 2008
            

             
            */
            

            
            public class 
            
            UDPClient 
            
            extends 
            
            Thread 
            {
            

                
            
            public 
            
            
            void 
            
            run
            () {
            

                    
            DatagramChannel channel = 
            
            null
            
            ;
            

                    
            Selector selector = 
            
            null
            
            ;
            

                    
            
            try 
            
            {
            

                        
            channel = DatagramChannel.open
            ()
            ;
            

                        
            channel.configureBlocking
            (
            
            false
            
            )
            ;
            

                        
            SocketAddress sa = 
            
            new 
            
            InetSocketAddress
            (
            "localhost"
            , 
            5057
            )
            ;
            

                        
            channel.connect
            (
            sa
            )
            ;
            

                    
            } 
            
            catch 
            
            (
            Exception e
            ) {
            

                        
            e.printStackTrace
            ()
            ;
            

                    
            }
            

            
            
            

                    
            
            try 
            
            {
            

                        
            selector = Selector.open
            ()
            ;
            

                        
            channel.register
            (
            selector, SelectionKey.OP_READ
            )
            ;
            

                        
            channel.write
            (
            Charset.defaultCharset
            ()
            .encode
            (
            "Tell me your time"
            ))
            ;
            

                    
            } 
            
            catch 
            
            (
            Exception e
            ) {
            

                        
            e.printStackTrace
            ()
            ;
            

                    
            }
            

                    
            

                    
            ByteBuffer byteBuffer = ByteBuffer.allocate
            (
            100
            )
            ;
            

                    
            
            while 
            
            (
            
            true
            
            ) {
            

                        
            
            try 
            
            {
            

                            
            
            int 
            
            eventsCount = selector.select
            ()
            ;
            

                            
            
            if 
            
            (
            eventsCount > 
            0
            ) {
            

                                
            Set selectedKeys = selector.selectedKeys
            ()
            ;
            

                                
            Iterator iterator = selectedKeys.iterator
            ()
            ;
            

                                
            
            while 
            
            (
            iterator.hasNext
            ()) {
            

                                    
            SelectionKey sk = 
            (
            SelectionKey
            ) 
            iterator.next
            ()
            ;
            

                                    
            iterator.remove
            ()
            ;
            

                                    
            
            if 
            
            (
            sk.isReadable
            ()) {
            

                                        
            DatagramChannel datagramChannel = 
            (
            DatagramChannel
            ) 
            sk
            

                                                
            .channel
            ()
            ;
            

                                        
            datagramChannel.read
            (
            byteBuffer
            )
            ;
            

                                        
            byteBuffer.flip
            ()
            ;
            

                                        
            

                                        
            //TODO ���报文�{化�ؓ(f��)RUDP消息�q�调用RUDP协议处理器来处理
            

                                        
            

                                        
            System.out.println
            (
            Charset.defaultCharset
            ()
            .decode
            (
            

                                                
            byteBuffer
            )
            .toString
            ())
            ;
            

                                        
            byteBuffer.clear
            ()
            ;
            

                                        
            datagramChannel.write
            (
            Charset.defaultCharset
            ()
            

                                                
            .encode
            (
            "Tell me your time"
            ))
            ;
            

                                    
            }
            

                                
            }
            

                            
            }
            

                        
            } 
            
            catch 
            
            (
            Exception e
            ) {
            

                            
            e.printStackTrace
            ()
            ;
            

                        
            }
            

                    
            }
            

            
            
            

                
            }
            

            }

徐辛�?/a> 2008-10-20 22:38 发表评论

Mon, 20 Oct 2008 13:48:00 GMT

摘要: 阅读全文

徐辛�?/a> 2008-10-20 21:48 发表评论

用ClassLoader��d��资源文�g

Sun, 19 Oct 2008 12:36:00 GMT

关于��d��资源文�g�Q�如文本文�g、图像、二�q�制文�g�{�）(j��)�Q�一般不推荐直接�l�出操作�pȝ��的�\径，而是�l�出相对于当前类的相对�\径，�q�样��可以��用类的装载器来装载资源文件。常用的�Ҏ(gu��)��有：(x��)

Class�cȝ��getResourceAsStream(String resourcePath);

ClassLoader�cȝ��getResourceAsStream(String resourcePath)

Class�cȝ��该方法最�l�还是委�z��C(j��)lassLoader的getResourceAsStream�Ҏ(gu��)��Q�但是��用中发现Class#getResourceAsStream()使用的是�l�对路径�Q�以/开��_(d��)��(j��)�Q�而ClassLoader#getResourceAsStream()使用的相对�\径�?

propterty文�g�l�常攑֜��c��\径的根�\径下�Q�最��层包的上层目录�Q�如classes�Q�，�q�样加蝲property文�g时就可以先用Class#getResourceAsStream�Ҏ(gu��)��获取输入源，再从该输入源load各entry�?/div> code piece:

package sinpo.usagedemo;

            

            import java.io.BufferedReader;

            import java.io.InputStream;

            import java.io.InputStreamReader;

            import java.util.Properties;

            

            import junit.framework.TestCase;

            

            /**

             * @author 徐辛�?sinpo.xu@hotmail.com)

             * Oct 19, 2008

             */

            public class LoadResource extends TestCase {

                public void test() throws Exception {

                    //usage 1�Q?#160;use absolute path (mostly used)

                    InputStream in1 = this.getClass().getResourceAsStream("/sinpo/test2.properties");

                    //usage 2: use relative path

                    InputStream in2 = this.getClass().getClassLoader().getResourceAsStream("sinpo/test2.properties");

                    //usage 3: use system class path

                    InputStream in3 = ClassLoader.getSystemResourceAsStream("system.properties");

                    

                    //���读取的资源作�ؓ(f��)Properties的输入源

                    Properties props = new Properties();

                    props.load(in1);

                    String propValue = props.getProperty("propKey");

                    System.out.println(propValue);

                    

                    //���读取的资源作�ؓ(f��)文本输出

                    InputStreamReader reader = new InputStreamReader(in1);

                    BufferedReader bReader = new BufferedReader(reader);

                    String content = bReader.readLine();

                    //输出�W�一行内�?/font>

                    System.out.println(content);

                    

                    //TODO close them

                }

            }

徐辛�?/a> 2008-10-19 20:36 发表评论

亚洲天堂免费视频,国产精品一区二区在线观看 ,日韩美女免费视频

JDOM常用�c�M���l�及(qi��ng)�C�Z��代码

也谈�U�程的休眠与�{�待

求助�Q�怎么贴代码才能保持代码的格式呀

用ClassLoader��d��资源文�g

JDOM常用�c�M��l�及(qi��ng)�C�Z��代码