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李凡 — Thu, 18 Oct 2012 08:45:00 GMT

最�?遗留一个问题，�l�箋探烦�?...

�l�一接口�Q?/p>

public interface HelloApi {
	public void sayHello();  
}

一、�g�q�初始化�Q?/p>

/**
 * 延迟初始化Bean
 *     延迟初始化也叫做惰性初始化�Q�指不提前初始化Bean�Q�而是只有在真正��用时才创建及初始化Bean�?
 *     配置方式很简单只需�?lt;bean>标签上指�?“lazy-init�?属性��gؓ“true”即可�g�q�初始化Bean�?
 */
public class DiLazyInit implements HelloApi{

	public void sayHello() {
		System.out.println("say DiInitDestory");
	}
	
	public DiLazyInit(){
		System.out.println("初始�?DiInitDestory");
	}
}

配置延迟初始化：

junit �q�行��试�Q?/p>

@Test
	public void testLazyInit(){
		ApplicationContext context = new ClassPathXmlApplicationContext("initdepends.xml");
		HelloApi lazyInit = context.getBean("lazyinitDi",HelloApi.class);
		lazyInit.sayHello();
		System.out.println("");
	}

注意�q�个时候的输出�l�果�Q?/p>

初始�?DiLazyInit

say DiLazyInit

二�?可以指定初始化和销毁的��序

/* 使用depends-on 是指 指定Bean初始化及销毁时的顺序，使用depends-on属性指定的Bean要先初始化完�?
*     后才初始化当前Bean�Q�由于只有“singleton”Bean能被Spring���理销毁，所以当指定的Bean都是“singleton�?
*     �Ӟ��使用depends-on属性指定的Bean要在指定的Bean之后销毁�?
*     “decorator”指定了“depends-on”属性�ؓ“lazyinitDi”，所以在“decorator”Bean初始化之前要先初
*     始化“lazyinitDi”，而在销毁“lazyinitDi”之前先要销毁“decorator”，大家注意一下销毁顺序，与文档上的不�W��?
*     “depends-on”属性可以指定多个Bean�Q�若指定多个Bean可以用�?”、�?”、空格分剌Ӏ?
*     
*  那“depends-on”有什么好处呢�Q?
*     主要是给出明���的初始化及销毁顺序，比如要初始化“decorator”时要确保“lazyinitDi”Bean的资源准备好了，
*     否则使用“decorator”时会看不到准备的资源；而在销毁时要先在“decorator”Bean的把对“helloApi”资源的引用�?
*     放掉才能销毁“lazyinitDi”，否则可能销�?“lazyinitDi”时而“decorator”还保持着资源讉K���Q�造成资源不能释放或释��N��误�?
*/
public class ApiDecorator implements HelloApi{

	private HelloApi helloApi;
	
	public ApiDecorator(){
		System.out.println("初始�?ApiDecorator");
	}
	
	public void sayHello() {
		System.out.println("say ApiDecorator");
		helloApi.sayHello();
		
	}

	public HelloApi getHelloApi() {
		return helloApi;
	}

	public void setHelloApi(HelloApi helloApi) {
		this.helloApi = helloApi;
	}
}

配置xml指定初始化和销毁顺序：

junit �q�行��试�Q?/p>

@Test
	public void testLazyInit(){
		ApplicationContext context = new ClassPathXmlApplicationContext("initdepends.xml");
		HelloApi lazyInit = context.getBean("lazyinitDi",HelloApi.class);
		lazyInit.sayHello();
		System.out.println("");
	}
	
	@Test
	public void testDependsOn(){
		ApplicationContext context= new ClassPathXmlApplicationContext("initdepends.xml");
		HelloApi depends = context.getBean("decorator",HelloApi.class);
		depends.sayHello();
	}

注意�q�个时候的输出�l�果�Q?/p>

初始�?DiLazyInit

初始�?ApiDecorator //也是上面同样的测试函�?testLazyInit()�Q�同��L��配置 �q�句是多打印出来�?/strong>

say DiLazyInit

初始�?DiLazyInit

初始�?ApiDecorator

say ApiDecorator

say DiLazyInit

�q�突然多出来的打印结果，说明�q�行了ApiDecorator的对象的创徏�Q?/p>
但是在第一个配�|�中也没涉及刊W�ApiDecorator �cȝ��加蝲�Q�注�? �?/p>

什么原因造成的呢�Q?span style="color: #0000ff;">是一�U�隐藏的注入�Q?�l�箋探烦�?...

已有 1 人发表留�a��Q�猛�?>>�q�里<<-参与讨论

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李凡 2012-10-18 16:45 发表评论

跟我学Spring3 学习�W�记�?注入

李凡 — Thu, 18 Oct 2012 06:32:00 GMT

跟我学Spring3 学习�W�记一

 跟我学Spring3 学习�W�记�?/a>

跟我学Spring3 学习�W�记�?/span>

跟我学Spring3 学习�W�记�?/span>

跟我学Spring3 学习�W�记�?注入

引用其它Bean

一、构造器注入方式�Q?/strong>

�Q?�Q�通过�?”标�{��ref属性来引用其他Bean

�Q?�Q�通过�?”标�{��?lt;ref>标签来引用其他Bean�Q��用bean属性来指定引用的Bean

二、setter注入方式�Q?/strong>

�Q?�Q�通过�?”标�{��ref属性来引用其他Bean

�Q?�Q�通过�?”标�{��?lt;ref>标签来引用其他Bean�Q��用bean属性来指定引用的Bean

public class HelloDiBean implements HelloApi{ private HelloApi helloApi; private HelloApi helloApi2; public HelloDiBean(HelloApi helloApi){ this.helloApi = helloApi; } public void sayHello() { helloApi.sayHello(); helloApi2.sayHello(); } public HelloApi getHelloApi2() { return helloApi2; } public void setHelloApi2(HelloApi helloApi2) { this.helloApi2 = helloApi2; } }

配置注入引用其他的bean

其他引用bean 的高�U�用法：

/** * Spring�q�提供了另外两种更高�U�的配置方式�Q?lt;ref local=”�?>�?lt;ref parent=”�?>�Q? * �Q?�Q?lt;ref local=”�?>配置方式�Q�用于引用通过方式从而如果配�|�错误能在开发调试时��发现错误�? * �Q?�Q?lt;ref parent=”�?>配置方式�Q�用于引用父容器中的Bean�Q�不会引用当前容器中的Bean�Q? * 当然父容器中的Bean和当前容器的Bean是可以重名的�Q�获取顺序是直接到父容器找�? */ public class HelloHigh implements HelloApi{ private HelloApi helloApi; private HelloApi helloApi2; public HelloHigh(HelloApi helloApi){ this.helloApi = helloApi; } public void sayHello() { helloApi.sayHello(); System.out.println(""); helloApi2.sayHello(); } public HelloApi getHelloApi2() { return helloApi2; } public void setHelloApi2(HelloApi helloApi2) { this.helloApi2 = helloApi2; } }

helloworld.xml�Q?/span>

1sss 2 1=11 2=22; 3=33, 4=44

helloworldParent.xml�Q?/span>

2dss 3aas 1=111 2=222; 3=333, 4=444

调用�?利用加蝲父容器的方式�Q�注入父容器中的Bean�Q?/p>

@Test public void testDiBeanHigh() { // 以classes为根目录��v // ��d��配置文�g实例化一个Ioc容器 // 初始化父容器 ApplicationContext parentContext = new ClassPathXmlApplicationContext( "helloworldParent.xml"); // 初始化当前容�? ApplicationContext context = new ClassPathXmlApplicationContext( new String[] { "helloworld.xml" }, parentContext); // 构�?+ setter注入引用其他的bean注入 HelloApi helloApi = context.getBean("helloHigh", HelloApi.class); helloApi.sayHello(); }

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李凡 2012-10-18 14:32 发表评论

李凡 — Wed, 17 Oct 2012 08:14:00 GMT

1.1 JavaScript 学习�W�记一动态�?/a>

1.2 JavaScript 学习�W�记 �?对象的访�?/a>

1.3 JavaScript 学习�W�记 �?原型(prototype)

1.4 JavaScript 学习�W�记 �?this指针

1.5 JavaScript 学习�W�记 �?函数

1.6 JavaScript 学习�W�记 �?函数作用�?/a>

1.7 JavaScript 学习�W�记 �?数组

1.8 JavaScript 学习�W�记 �?正则表达式《一�?/a>

1.9 JavaScript 学习�W�记 �?正则表达式《二�?/a>

1.10 JavaScript 学习�W�记 �?正则表达式《三�?/a>

1.11 JavaScript 学习�W�记�?闭包

1.12 JavaScript 学习�W�记跑马�?/a>

1.13 JavaScript 学习�W�记�?闭包�?/a>

1.14 JavaScript 学习�W�记�?�l�承与引�?/a>

1.15 JavaScript 学习�W�记�?new和apply�Q�call

1.16 JavaScript 学习�W�记�?�l�习��d��pȝ��

1.17 JavaScript 学习�W�记十一函数高��应用

1.18 JavaScript 学习�W�记十二函数式编�E�风�?/a>

1.19 JavaScript 学习�W�记十三面向对象�Q?/a>

1.20 JavaScript 学习�W�记十四 this�Ҏ��，静态方�?和实例方法，prototype

1.21 JavaScript 学习�W�记十五规范的编�?/a>

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李凡 2012-10-17 16:14 发表评论

动态生成class

李凡 — Tue, 16 Oct 2012 03:18:00 GMT

ASM �q�行动态生成class

import org.objectweb.asm.ClassWriter; import org.objectweb.asm.MethodVisitor; import org.objectweb.asm.Opcodes; public class HelloWorld extends ClassLoader implements Opcodes{ public static void main(String[] args) { ClassWriter cw = new ClassWriter(0); cw.visit(V1_1, ACC_PUBLIC, "Example", null, "java/lang/Object", null); MethodVisitor mw = cw.visitMethod(ACC_PUBLIC, "", "()V", null, null); mw.visitVarInsn(ALOAD, 0); mw.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "", "()V"); mw.visitInsn(RETURN); mw.visitMaxs(1, 1); mw.visitEnd(); mw = cw.visitMethod(ACC_PUBLIC+ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null); mw.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mw.visitLdcInsn("Hello World!"); mw.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V"); mw.visitInsn(RETURN); mw.visitMaxs(2, 2); mw.visitEnd(); byte[] code = cw.toByteArray(); FileOutputStream fos; try { fos = new FileOutputStream("Example.class"); fos.write(code); fos.close(); HelloWorld loader = new HelloWorld(); Class exampleClass = loader .defineClass("Example", code, 0, code.length); exampleClass.getMethods()[0].invoke(null, new Object[] { null }); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalAccessException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (InvocationTargetException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

cglib 动态生成class �q�进行拦�?/pre>

public class MyClass { public void print() { System.out.println("I'm in MyClass.print!"); } } import net.sf.cglib.proxy.Callback; import net.sf.cglib.proxy.Enhancer; import net.sf.cglib.proxy.MethodInterceptor; import net.sf.cglib.proxy.MethodProxy; public class Main { public static void main(String[] args) { Enhancer enhancer = new Enhancer(); enhancer.setSuperclass(MyClass.class); enhancer.setCallback((Callback) new MethodInterceptorImpl()); MyClass my = (MyClass) enhancer.create(); my.print(); } private static class MethodInterceptorImpl implements MethodInterceptor { public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable { // log something System.out.println(method + " intercepted!"); proxy.invokeSuper(obj, args); return null; } } }

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李凡 2012-10-16 11:18 发表评论

李凡 — Wed, 10 Oct 2012 08:26:00 GMT

工具�c�：

import java.io.BufferedReader; import java.io.ByteArrayOutputStream; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.File; import java.io.FileFilter; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.RandomAccessFile; import java.util.ArrayList; import java.util.List; import java.util.StringTokenizer; import sun.net.TelnetInputStream; import sun.net.TelnetOutputStream; import sun.net.ftp.FtpClient; import sun.net.ftp.FtpLoginException; public class FtpUtil { /** * @param args */ public static void main(String[] args) { FtpUtil ftp = new FtpUtil(); ftp.connect("10.16.12.75", 21, "ftpusr", "ftpusr"); try { // 上传目录下文�?�q�可以递归到子目录 // ftp.upPathFile(new File("D:\\ALSC"), "ALSC/"); // 下蝲目录下多个文�?�q�可以递归到子目录 //ftp.downPathFile("/opt/ftp/outgoing/cs/", "D:/outgoing/csvc"); // 切换目录 ftp.setPath("/opt/ftp/book"); System.out.println(ftp.getDir()); for (String file : ftp.getFileNameList()) { System.out.println(file); } // 切换到父�U�目�? ftp.up(); // 创徏多目�? // ftp.createDir("aa/bb/cc"); ftp.setPath("ftpTest"); // 删除文�g ftp.deleteFile("bbb.bmp"); System.out.println(ftp.getDir()); for (String file : ftp.getFileNameList()) { System.out.println(file); } // 上传下蝲单个文�g ftp.uploadFile("c:/aaa.bmp", "bbb.bmp"); ftp.downloadFile("bbb.bmp", "c:/bbb"); List list = ftp.getFileList(); for (String file : list) { System.out.println(file); } ftp.setPath("/opt/ftp/outgoing/cs"); String patternStr = "^CSGET_[0-9]{4}_0085_"+"20120926"+"_[0-9]{3}"; // �q��o�Q�获取目录下的文件列�? list = ftp.getFileList(new CSFilter(patternStr)); for (String file : list) { System.out.println(file); } //下蝲 �q��o后的文�g ftp.downPathFile("/opt/ftp/outgoing/cs/", "D:/outgoing/csvc",new CSFilter(patternStr)); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } ftp.close(); } private FtpClient ftpClient = null; /** * 打开�q�接 * * @param hostname * @param port * @param username * @param passwd * @return */ public void connect(String hostname, int port, String username, String passwd) { String msg = ""; try { ftpClient = new FtpClient(hostname, port); ftpClient.login(username, passwd); ftpClient.binary(); msg = "�q�接成功�Q?; } catch (FtpLoginException e) { msg = "��d��L��p�|�Q�可能是用户名密码错误！"; e.printStackTrace(); } catch (IOException e) { msg = "��d��L��p�|�Q�请��验端品是否正��！"; e.printStackTrace(); } catch (SecurityException e) { msg = "无权�q�接��L��Q�主��认是否有权限连接主机！"; e.printStackTrace(); } System.out.println(msg); } /** * 关闭�q�接 */ public void close() { if (ftpClient == null) { return; } try { ftpClient.closeServer(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } /** * 重命�? * * @param oldName * @param newName * @return */ public boolean renameFile(String oldName, String newName) { boolean result = false; try { this.ftpClient.rename(oldName, newName); result = true; } catch (IOException e) { e.printStackTrace(); } return result; } /** * 取得相对于当前连接目录的某个目录下所有文件列�? * * @param path * @return */ public List getFileList(String path) { List list = new ArrayList(); DataInputStream dis; try { dis = new DataInputStream(ftpClient.nameList(this.getDir() + path)); String filename = ""; while ((filename = dis.readLine()) != null) { list.add(filename); } } catch (IOException e) { e.printStackTrace(); } return list; } /** * ��d��文�g列表 * * @return * @throws IOException */ public List getFileList() throws IOException { List fileList = new ArrayList(); InputStreamReader isr = null; BufferedReader br = null; try { isr = new InputStreamReader(this.ftpClient.list()); br = new BufferedReader(isr); String fileName = ""; while (true) { fileName = br.readLine(); if (fileName == null) { break; } fileList.add(fileName); } } finally { if (br != null) { try { br.close(); } catch (IOException e) { e.printStackTrace(); } } if (isr != null) { try { isr.close(); } catch (IOException e) { e.printStackTrace(); } } } return fileList; } /** * ��d��文�g列表 * * @return * @throws IOException */ public List getFileList(FileFilter filter) throws IOException { List fileList = new ArrayList(); InputStreamReader isr = null; BufferedReader br = null; try { isr = new InputStreamReader(this.ftpClient.list()); br = new BufferedReader(isr); String fileName = ""; while (true) { fileName = br.readLine(); if (fileName == null) { break; } if ((filter == null) || filter.accept(new File(fileName))) fileList.add(fileName); } } finally { if (br != null) { try { br.close(); } catch (IOException e) { e.printStackTrace(); } } if (isr != null) { try { isr.close(); } catch (IOException e) { e.printStackTrace(); } } } return fileList; } /** * 获取文�g名列�? * * @return * @throws IOException */ public List getFileNameList() throws IOException { List fileNameList = new ArrayList(); InputStreamReader isr = null; BufferedReader br = null; try { isr = new InputStreamReader(this.ftpClient.nameList(this.getDir())); br = new BufferedReader(isr); String fileName = ""; while (true) { fileName = br.readLine(); if (fileName == null) { break; } fileNameList.add(fileName); } } finally { if (br != null) { try { br.close(); } catch (IOException e) { e.printStackTrace(); } } if (isr != null) { try { isr.close(); } catch (IOException e) { e.printStackTrace(); } } } return fileNameList; } /** * 讄��路径切换目录 * * @param path * @return */ public boolean setPath(String path) { if (this.ftpClient != null) { try { ftpClient.cd(path); return true; } catch (IOException e) { e.printStackTrace(); return false; } } else { return false; } } /** * 判断是否为目�? * * @param line * @return */ public boolean isDir(String line) { return line.startsWith("d"); } /** * ��查文件夹在当前目录下是否存在 * * @param dir * @return */ public boolean isDirExist(String dir) { String pwd = ""; try { pwd = ftpClient.pwd(); ftpClient.cd(dir); ftpClient.cd(pwd); } catch (Exception e) { return false; } return true; } /** * 获取当前路径 * * @return * @throws IOException */ public String getDir() throws IOException { return this.ftpClient.pwd(); } /** * 向上切换到父�U�目�? * * @throws IOException */ public void up() throws IOException { if ("/".equals(ftpClient.pwd()) || "http://".equals(ftpClient.pwd())) { return; } this.ftpClient.cdUp(); } /** * 删除文�g * * @param fileName * @return */ public void deleteFile(String fileName) { ftpClient.sendServer("dele " + fileName + "\r\n");// �q�个地方一定要注意加上 \r\n try { if (ftpClient.readServerResponse() != 250) System.out.println("删除异常"); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } /** * 在当前目录下创徏文�g�? * * @param dir * @return * @throws Exception */ public boolean createDir(String dir) { try { ftpClient.ascii(); StringTokenizer s = new StringTokenizer(dir, "/"); // sign s.countTokens(); String pathName = ftpClient.pwd(); while (s.hasMoreElements()) { pathName = pathName + "/" + (String) s.nextElement(); try { ftpClient.sendServer("MKD " + pathName + "\r\n"); } catch (Exception e) { e = null; return false; } ftpClient.readServerResponse(); } ftpClient.binary(); return true; } catch (IOException e1) { e1.printStackTrace(); return false; } } /** * 上传文�g * * @param localFile * @param targetFileName * @return */ public boolean uploadFile(String localFile, String targetFileName) { boolean result = false; if (this.ftpClient == null) { return false; } TelnetOutputStream tos = null; RandomAccessFile sendFile = null; DataOutputStream dos = null; try { File file = new File(localFile); sendFile = new RandomAccessFile(file, "r"); sendFile.seek(0); tos = this.ftpClient.put(targetFileName); dos = new DataOutputStream(tos); int ch = 0; while (sendFile.getFilePointer() < sendFile.length()) { ch = sendFile.read(); dos.write(ch); } result = true; } catch (Exception ex) { result = false; } finally { if (tos != null) { try { tos.close(); } catch (IOException e) { e.printStackTrace(); } } if (dos != null) { try { dos.close(); } catch (IOException e) { e.printStackTrace(); } } if (sendFile != null) { try { sendFile.close(); } catch (IOException e) { e.printStackTrace(); } } } return result; } /** * 上传文�g * * @param localFile * @param targetFileName * @return */ public boolean uploadFile(File localFile, String targetFileName) { boolean result = false; if (this.ftpClient == null) { return false; } TelnetOutputStream tos = null; RandomAccessFile sendFile = null; DataOutputStream dos = null; try { sendFile = new RandomAccessFile(localFile, "r"); sendFile.seek(0); tos = this.ftpClient.put(targetFileName); dos = new DataOutputStream(tos); int ch = 0; while (sendFile.getFilePointer() < sendFile.length()) { ch = sendFile.read(); dos.write(ch); } result = true; } catch (Exception ex) { result = false; } finally { if (tos != null) { try { tos.close(); } catch (IOException e) { e.printStackTrace(); } } if (dos != null) { try { dos.close(); } catch (IOException e) { e.printStackTrace(); } } if (sendFile != null) { try { sendFile.close(); } catch (IOException e) { e.printStackTrace(); } } } return result; } /** * 上传本地目录下的所有文件到服务器上 * * @param srcPath * @param tagPath * @param level * 递归的��? * @return * @see [�c�R��类#�Ҏ��、类#成员] */ public boolean upPathFile(File srcPathFile, String tagPath) { buildList(tagPath.substring(0, tagPath.lastIndexOf("/"))); boolean result = true; try { File temp[] = srcPathFile.listFiles(); for (int i = 0; i < temp.length; i++) { if (temp[i].isDirectory()) { if (tagPath.lastIndexOf('/') > 0) { result = upPathFile(temp[i], tagPath + temp[i].getName() + "/"); } else { result = upPathFile(temp[i], tagPath + "/" + temp[i].getName() + "/"); } } else { if (tagPath.lastIndexOf('/') > 0) { result = uploadFile(temp[i], tagPath + temp[i].getName()); } else { result = uploadFile(temp[i], tagPath + "/" + temp[i].getName()); } } } } catch (Exception e) { e.printStackTrace(); } return result; } /** * 下蝲文�g * * @param srcFileName * @param targetFileName * @return */ public boolean downloadFile(String srcFileName, String targetFileName) { if (this.ftpClient == null) { return false; } TelnetInputStream tis = null; RandomAccessFile getFile = null; boolean result = true; try { File file = new File(targetFileName); getFile = new RandomAccessFile(file, "rw"); getFile.seek(0); tis = this.ftpClient.get(srcFileName); DataInputStream dis = new DataInputStream(tis); int ch = 0; while (true) { ch = dis.read(); if (ch < 0) { break; } getFile.write(ch); } getFile.close(); } catch (IOException e) { result = false; } finally { if (getFile != null) { try { getFile.close(); } catch (IOException e) { e.printStackTrace(); } } if (tis != null) { try { tis.close(); } catch (IOException e) { e.printStackTrace(); } } } return result; } /** * 下蝲文�g * * @param srcFileName * @param targetFileName * @return */ public boolean downloadFile(String srcFileName, File targetFileName) { if (this.ftpClient == null) { return false; } TelnetInputStream tis = null; RandomAccessFile getFile = null; boolean result = true; try { getFile = new RandomAccessFile(targetFileName, "rw"); getFile.seek(0); tis = this.ftpClient.get(srcFileName); DataInputStream dis = new DataInputStream(tis); int ch = 0; while (true) { ch = dis.read(); if (ch < 0) { break; } getFile.write(ch); } getFile.close(); } catch (IOException e) { result = false; } finally { if (getFile != null) { try { getFile.close(); } catch (IOException e) { e.printStackTrace(); } } if (tis != null) { try { tis.close(); } catch (IOException e) { e.printStackTrace(); } } } return result; } /** * 下蝲�q�程目录下的所有文件到本地 * * @param srcPathFile * �q�程目录文�g * @param tagPath * 本地存放目录 * @return * @throws IOException * @see [�c�R��类#�Ҏ��、类#成员] */ public boolean downPathFile(String srcPath, String tagPath) throws IOException { boolean result = true; File tagFile = new File(tagPath); tagFile.mkdirs(); setPath(srcPath); String tempPath = ""; List list = getFileList(); for (int i = 0; i < list.size(); i++) { String currPath = list.get(i); String fileName = getFileName(currPath); String currPathFul = getDir() + "/" + fileName; if (tagPath.lastIndexOf('/') > 0) { tempPath = tagPath + currPathFul.substring(currPathFul.lastIndexOf("/"), currPathFul.length()); } else { tempPath = tagPath + "/" + currPathFul.substring(currPathFul.lastIndexOf("/"), currPathFul.length()); } if (isDir(currPath)) { srcPath = currPathFul + "/"; downPathFile(srcPath, tempPath); } else { srcPath = currPathFul; downloadFile(srcPath, tempPath); } } return result; } /** * 下蝲�q�程目录下的所有文件到本地�Q�过滤规�? * * @param srcPathFile * �q�程目录文�g * @param tagPath * 本地存放目录 * @param fileFilter * 下蝲�q��o文�g * @return * @throws IOException * @see [�c�R��类#�Ҏ��、类#成员] */ public boolean downPathFile(String srcPath, String tagPath, FileFilter fileFilter) throws IOException { boolean result = true; File tagFile = new File(tagPath); tagFile.mkdirs(); setPath(srcPath); String tempPath = ""; List list = getFileList(fileFilter); for (int i = 0; i < list.size(); i++) { String currPath = list.get(i); String fileName = getFileName(currPath); String currPathFul = getDir() + "/" + fileName; if (tagPath.lastIndexOf('/') > 0) { tempPath = tagPath + currPathFul.substring(currPathFul.lastIndexOf("/"), currPathFul.length()); } else { tempPath = tagPath + "/" + currPathFul.substring(currPathFul.lastIndexOf("/"), currPathFul.length()); } if (isDir(currPath)) { srcPath = currPathFul + "/"; downPathFile(srcPath, tempPath, fileFilter); } else { srcPath = currPathFul; downloadFile(srcPath, tempPath); } } return result; } public String getFileName(String line) { int i; String filename = (String) parseLine(line).get(8); for (i = 9; i < parseLine(line).size(); i++) { filename = filename + " " + ((String) parseLine(line).get(i)); } return filename; } // 处理getFileList取得的行信息 private ArrayList parseLine(String line) { ArrayList s1 = new ArrayList(); StringTokenizer st = new StringTokenizer(line, " "); while (st.hasMoreTokens()) { s1.add(st.nextToken()); } return s1; } /** * 从FTP文�g服务器上下蝲文�gSourceFileName�Q�到本地destinationFileName 所有的文�g名中都要求包括完整的路径名在�? * * @param SourceFileName * String * @param destinationFileName * String * @throws Exception */ public void downFile(String SourceFileName, String destinationFileName) throws Exception { ftpClient.binary(); // 一定要使用二进制模�? TelnetInputStream ftpIn = ftpClient.get(SourceFileName); byte[] buf = new byte[204800]; int bufsize = 0; FileOutputStream ftpOut = new FileOutputStream(destinationFileName); while ((bufsize = ftpIn.read(buf, 0, buf.length)) != -1) { ftpOut.write(buf, 0, bufsize); } ftpOut.close(); ftpIn.close(); } /** * 从FTP文�g服务器上下蝲文�g�Q�输出到字节数组�? * * @param SourceFileName * String * @return byte[] * @throws Exception */ public byte[] downFile(String SourceFileName) throws Exception { ftpClient.binary(); // 一定要使用二进制模�? TelnetInputStream ftpIn = ftpClient.get(SourceFileName); ByteArrayOutputStream byteOut = new ByteArrayOutputStream(); byte[] buf = new byte[204800]; int bufsize = 0; while ((bufsize = ftpIn.read(buf, 0, buf.length)) != -1) { byteOut.write(buf, 0, bufsize); } byte[] return_arraybyte = byteOut.toByteArray(); byteOut.close(); ftpIn.close(); return return_arraybyte; } /** * 上传文�g到FTP服务�?destination路径以FTP服务器的"/"开始，带文件名�?上传文�g只能使用二进制模式， * 当文件存在时再次上传则会覆盖 * * @param source * String * @param destination * String * @throws Exception */ public void upFile(String source, String destination) throws Exception { buildList(destination.substring(0, destination.lastIndexOf("/"))); ftpClient.binary(); // 此行代码必须攑֜�buildList之后 TelnetOutputStream ftpOut = ftpClient.put(destination); TelnetInputStream ftpIn = new TelnetInputStream(new FileInputStream( source), true); byte[] buf = new byte[204800]; int bufsize = 0; while ((bufsize = ftpIn.read(buf, 0, buf.length)) != -1) { ftpOut.write(buf, 0, bufsize); } ftpIn.close(); ftpOut.close(); } /** * JSP中的��上传到FTP服务�? 上传文�g只能使用二进制模式，当文件存在时再次上传则会覆盖字节数组做�ؓ文�g的输入流, * 此方法适用于JSP中通过request输入��来直接上传文�g在RequestUpload�c�M��调用了此�Ҏ��Q? * destination路径以FTP服务器的"/"开始，带文件名 * * @param sourceData * byte[] * @param destination * String * @throws Exception */ public void upFile(byte[] sourceData, String destination) throws Exception { buildList(destination.substring(0, destination.lastIndexOf("/"))); ftpClient.binary(); // 此行代码必须攑֜�buildList之后 TelnetOutputStream ftpOut = ftpClient.put(destination); ftpOut.write(sourceData, 0, sourceData.length); // ftpOut.flush(); ftpOut.close(); } /** * 在FTP服务器上建立指定的目�?当目录已�l�存在的情下不会影响目录下的文�g,�q�样用以判断FTP * 上传文�g时保证目录的存在目录格式必须�?/"根目录开�? * * @param pathList * String * @throws Exception */ public void buildList(String pathList) { try { ftpClient.ascii(); StringTokenizer s = new StringTokenizer(pathList, "/"); // sign int count = s.countTokens(); String pathName = ""; while (s.hasMoreElements()) { pathName = pathName + (String) s.nextElement(); try { ftpClient.sendServer("XMKD " + pathName + "\r\n"); } catch (Exception e) { e = null; } int reply = ftpClient.readServerResponse(); pathName = pathName + "/"; } ftpClient.binary(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } }

�q��o�Q?/p>

import java.io.File; import java.io.FileFilter; import java.util.ArrayList; import java.util.StringTokenizer; import java.util.regex.Pattern; public class CSFilter implements FileFilter { private String patternStr ; //"^CSGET_[0-9]{4}_0085_"+"20120926"+"_[0-9]{3}" private Pattern pattern ; public CSVCFilter(String str){ this.patternStr = str; this.pattern = Pattern.compile(patternStr); } public boolean accept(File pathname) { String strName = pathname.getName(); if (!isDir(strName)) { strName = getFileName(strName); System.out.println(strName); return pattern.matcher(strName).matches(); } return true; } public boolean isDir(String strName) { return ((String) parseLine(strName).get(0)).indexOf("d") != -1; } public String getFileName(String line) { int i; String filename = (String) parseLine(line).get(8); for (i = 9; i < parseLine(line).size(); i++) { filename = filename + " " + ((String) parseLine(line).get(i)); } return filename; } // 处理getFileList取得的行信息 private ArrayList parseLine(String line) { ArrayList s1 = new ArrayList(); StringTokenizer st = new StringTokenizer(line, " "); while (st.hasMoreTokens()) { s1.add(st.nextToken()); } return s1; } public String getFileSize(String line) { return (String) parseLine(line).get(4); } public String getFileDate(String line) { ArrayList a = parseLine(line); return (String) a.get(5) + " " + (String) a.get(6) + " " + (String) a.get(7); } }

下蝲速度提升

public boolean downloadFile(String srcFileName, File targetFileName) { //..... //下蝲速度太慢�Q�用如下方式�q�行提升 byte[] recvbuf = new byte[1024]; while((ch = dis.read(recvbuf)) > 0){ getFile.write(recvbuf,0,ch); } // while (true) { // ch = dis.read(); // if (ch < 0) { // break; // } // getFile.write(ch); // } //... }

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李凡 2012-10-10 16:26 发表评论

java 高性能�|�络�~�程 NIO

李凡 — Fri, 28 Sep 2012 08:31:00 GMT

服务器端�Q?/p>

// 1. 分配一�?ServerSocketChannel 文�g描述�W? serverChannel = ServerSocketChannel.open(); // 2. �?ServerSocketChannel里获取一个对于的 socket serverSocket = serverChannel.socket(); // 3. 生成一�?Selector selector = Selector.open(); // 4. �?socket �l�定到端口上 serverSocket.bind(new InetSocketAddress(iport)); // 5. serverChannel 未非bolck serverChannel.configureBlocking(false); // 6. 通过Selector注册ServerSocketChannel: 只能注册 accept // 而SocketChannel可以注册CONNENCT,READ,WRITE ; register -> validOps // 在各个子�c�d��C��? serverChannel.register(selector, SelectionKey.OP_ACCEPT); while (true) { try { // 获得IO准备��q�A的channel数量 int n = selector.select(); // 没有channel准备��q�A,�l�箋执行 if (n == 0) { continue; } // 用一个iterator�q�回Selector的selectedkeys Iterator it = selector.selectedKeys().iterator(); // 处理每一个SelectionKey while (it.hasNext()) { SelectionKey key = (SelectionKey) it.next(); // 判断是否有新的连接到�? if (key.isAcceptable()) { // �q�回SelectionKey的ServerSocketChannel ServerSocketChannel server = (ServerSocketChannel) key .channel(); System.out.println("有连�?); SocketChannel channel = server.accept(); registerChannel(selector, channel, SelectionKey.OP_READ); doWork(channel); } // 判断是否有数据在此channel里需要读�? if (key.isReadable()) { processData(key); } } // 删除 selectedkeys it.remove(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } }

客户端：

//打开socket通道 SocketChannel socketChannel = SocketChannel.open(); //讄��非阻塞方�? socketChannel.configureBlocking(false); //打开选择�? Selector selector = Selector.open(); //注册�q�接到服务器socket动作 socketChannel.register(selector, SelectionKey.OP_CONNECT); //�q�接 socketChannel.connect( new InetSocketAddress("localhost",9988)); Set selectkeySets; SelectionKey selectionKey; Iterator iterator; //与服务器通信通道 SocketChannel clientChannel ; while(true){ //选择一�l�徏�Q�其相应的通道已�ؓI/O操作准备��q�A //此方法执行处于阻塞模式的选择操作 selector.select(TIME_OUT); //�q�回此选择器的已选择键集�? selectkeySets = selector.selectedKeys(); iterator = selectkeySets.iterator(); while(iterator.hasNext()){ selectionKey = iterator.next(); if (selectionKey.isConnectable()) { clientChannel = (SocketChannel)selectionKey.channel(); // 判断此通道上是否正在进行连接操作�? // 完成套接字通道的连接过�E��? if (clientChannel.isConnectionPending()) {//判断此通道上是否正在进行连接操�? clientChannel.finishConnect(); //完成套接字通道的连接过�E? } clientChannel.register(selector, SelectionKey.OP_WRITE); }else if (selectionKey.isReadable()) { clientChannel = (SocketChannel)selectionKey.channel(); //��缓冲区清空 receiveBuffer.clear(); //��d��服务器发送来的数据库到缓冲区 count = clientChannel.read(receiveBuffer);//count ��d��到的字节�? if (count > 0) { clientChannel.register(selector, SelectionKey.OP_WRITE); } }else if (selectionKey.isWritable()) { sendBuffer.clear(); clientChannel = (SocketChannel)selectionKey.channel(); clientChannel.write(sendBuffer); System.out.println("客户端向服务器发送数�?"+sendText); clientChannel.register(selector, SelectionKey.OP_READ); } } }

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李凡 2012-09-28 16:31 发表评论

java 高性能�|�络�~�程 mina

李凡 — Fri, 28 Sep 2012 02:52:00 GMT

服务器端�Q?br>

// 创徏一个非��d��的server端socket �Q�用NIO SocketAcceptor acceptor = new NioSocketAcceptor(); // 创徏接收数据的过滤器 DefaultIoFilterChainBuilder chain = acceptor.getFilterChain(); // 讑֮��q�个�q��o器一行一�?\r\n)的读数据 chain.addLast("myChin", new ProtocolCodecFilter( new TextLineCodecFactory())); //讑֮�服务器端的消息处理器,一个SamplMinaServerHandler对象(自己实现)�l�承IoHandlerAdapter acceptor.setHandler(new IoHandlerAdapter(){ //当一个客端端�q�结�q�入�? @Override public void sessionOpened(IoSession session) throws Exception { // TODO Auto-generated method stub System.out.println("incomming client : "+session.getRemoteAddress()); } //当一个客��L��关闭�? @Override public void sessionClosed(IoSession session) throws Exception { // TODO Auto-generated method stub System.out.println("on client disconnect : "+session.getRemoteAddress()); } //当客��L��发送的消息到达�? @Override public void messageReceived(IoSession session, Object message) throws Exception { // TODO Auto-generated method stub String s = (String)message; System.out.println("收到客户端发来的消息:"+s); //��试��消息回�l�客��L�� session.write(s+count); count ++; } private int count =0; }); //端口�? int bindPort= 9988; //�l�定打开�Q�启动服务器 acceptor.bind(new InetSocketAddress(bindPort)); System.out.println("Mina Server is listing on:="+bindPort);




  客户端：


// create TCP/IP connector NioSocketConnector connector = new NioSocketConnector(); // 创徏接收数据的过滤器 DefaultIoFilterChainBuilder chain = connector.getFilterChain(); // 讑֮��q�个�q��o器将一行一�?/r/n)的读取数�? chain.addLast("myChin", new ProtocolCodecFilter( new TextLineCodecFactory())); // 讑֮�服务器端的消息处理器:一个SamplMinaServerHandler对象, connector.setHandler(new IoHandlerAdapter(){ @Override public void messageReceived(IoSession session, Object message) throws Exception { // 我们��p��定了服务器解析消息的规则是一行一行读�?�q�里��可转�ؓString: String s = (String) message; // Write the received data back to remote peer System.out.println("服务器发来的收到消息: " + s); // ��试��消息回送给客户�? session.write(s); } @Override public void sessionClosed(IoSession session) throws Exception { // TODO Auto-generated method stub System.out.println("one Clinet Disconnect !"); } @Override public void sessionOpened(IoSession session) throws Exception { // TODO Auto-generated method stub System.out.println("incomming client " + session.getRemoteAddress()); session.write("我来�?......."); } }); // Set connect timeout. connector.setConnectTimeout(30); // �q�结到服务器: ConnectFuture cf = connector.connect(new InetSocketAddress("localhost", 9988)); // Wait for the connection attempt to be finished. cf.awaitUninterruptibly(); cf.getSession().getCloseFuture().awaitUninterruptibly(); connector.dispose();





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李凡 2012-09-28 10:52 发表评论

分表分区

李凡 — Thu, 27 Sep 2012 01:58:00 GMT

分表用用户ID位数取模

分区用时间进行分�?/p>

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李凡 2012-09-27 09:58 发表评论

李凡 — Tue, 25 Sep 2012 05:52:00 GMT

URL url = new URL("http://blog.csdn.net/mywait_00/article/details/1698627"); //讄��代理 Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("openproxy.fsfd.com", 8080)); //打开代理 URLConnection coon = url.openConnection(proxy); //讉K��的时候需要设�|?user-agent coon.setRequestProperty("User-Agent","Mozila/4.0(compatible;MSIE 5.0;Windows XP;DigExt"); BufferedReader in = new BufferedReader(new InputStreamReader(coon.getInputStream())); String inputLine; StringBuffer html = new StringBuffer(); while ((inputLine = in.readLine()) != null) { html.append(inputLine); }

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李凡 2012-09-25 13:52 发表评论

java nio �~�程学习一

李凡 — Fri, 21 Sep 2012 08:08:00 GMT

Java.nio中的主要�c?br>ServerSocketChannel:ServerSocket的替代类.
SocketChannel:Socket的替代类
Selector:为ServerSocketChannel监控接受��q�A事�g,为SocketChannel监控�q�接��q�A,��d��l�和写就�l�事�?br>SelectionKey:代表ServerSocketChannel及SocketChannel向Selector注册事�g句柄
向SocketChannel和ServerSocketChannel注册事�g:
SelectionKey key=serverSocketChannel.register(selector,op)
Op的可选�?br>对于ServerSocketChannel只有一个事�?
(1)SelectionKye.OP_ACCEPT:接受�q�接��q�A事�g,表示臛_��有了一个客戯��?服务器可以接受这个连�?br>SocketChannel可能发生3�U�事�?br>(1)SelectionKey.OP_CONNECT:�q�接��׃ؓ事�g,表示客户与服务器的连接已�l�成�?br>(2)SelectionKey.OP_WRITE/OP_READ:写的��q�A事�g,表示已经可以向输出流写数据了SocketChannel提供了接受和发送的�Ҏ��
可以使用:read(ByteBuffer)write(ByteBuffer)写入写出

ServerSocketChannel�c?br>�Ҏ��:(PS�l�承�q�SelectableChannel�cȝ��Ҏ��)
    (1)open()静态方法获取ServerSocketChannel对象.
     (2)accept同ServerSocket,不过获取的是SocketChannel,�Ҏ��是否��d��q�回null�q�是��d��,值得注意的是accept�q�回的SocketChannel是阻塞模式的使用configureBlocking更改模式
     (3)socket() �q�回兌��的ServerSocket
SocketChannel�c?br>此类是Socket�cȝ��替代�c��?
�Ҏ��:(PS�l�承�q�SelectableChannel�cȝ��Ҏ��)
(1)open() open(SocketAddress)静态方法用来创建SocketChannel对象,�W�二个重写还会徏立于�q�程服务器的�q�接.
(2)socket()�q�回兌��的Socket对象
(3)isConnected()是否建立�q�接
(4)isConnectionPending判断是否正在�q�行�q�程�q�接
(5)connect() 建立�q�程�q�接() �Ҏ��是否��d��而不�?br>(6)finishConnect() 视图完成�q�程�q�接
(7)read()��d��数据(�q�个应该是接数据)
(8)write()写数�?�q�个是发送数�?

声明�Q?/p>
public static int PORT = 8888; ServerSocketChannel serverChannel; ServerSocket serverSocket; Selector selector;

初始化：

// 1. 分配一�?ServerSocketChannel 文�g描述�W? serverChannel = ServerSocketChannel.open(); // 2. �?ServerSocketChannel里获取一个对于的 socket serverSocket = serverChannel.socket(); // 3. 生成一�?Selector selector = Selector.open(); // 4. �?socket �l�定到端口上 serverSocket.bind(new InetSocketAddress(iport)); // 5. serverChannel 未非bolck serverChannel.configureBlocking(false); // 6. 通过Selector注册ServerSocketChannel: 只能注册 accept // 而SocketChannel可以注册CONNENCT,READ,WRITE ; register -> validOps // 在各个子�c�d��C��? serverChannel.register(selector, SelectionKey.OP_ACCEPT);

开启服务：

while (true) { try { // 获得IO准备��q�A的channel数量 int n = selector.select(); // 没有channel准备��q�A,�l�箋执行 if (n == 0) { continue; } // 用一个iterator�q�回Selector的selectedkeys Iterator it = selector.selectedKeys().iterator(); // 处理每一个SelectionKey while (it.hasNext()) { SelectionKey key = (SelectionKey) it.next(); // 判断是否有新的连接到�? if (key.isAcceptable()) { // �q�回SelectionKey的ServerSocketChannel ServerSocketChannel server = (ServerSocketChannel) key .channel(); System.out.println("有连�?); SocketChannel channel = server.accept(); registerChannel(selector, channel, SelectionKey.OP_READ); doWork(channel); } // 判断是否有数据在此channel里需要读�? if (key.isReadable()) { processData(key); } } // 删除 selectedkeys it.remove(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } }

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