Language – Page 17 – Neohope的网络笔记

CMD常用命令13卸载VirtualBox扩展包

Posted on 2013/03/25 by neohope — No Comments ↓

1、产看扩展包

VBoxManage list extpacks

2、卸载扩展包

VBoxManage extpack uninstall "Oracle VM VirtualBox Extension Pack"

3、安装扩展包

VBoxManage extpack install "PATH_TO_EXTENSION_PACK"

Python获取模块信息

Posted on 2013/02/09 by neohope — No Comments ↓

#获取已安装模块列表
help("modules")

#获取模块说明及帮助信息
help("zlib")

#获取模块方法清单
dir("zlib")

CGlib动态代理CallbackFilter

Posted on 2012/10/22 by neohope — No Comments ↓

1、Car.java

package com.ast.cglib.test;

public class Car {

}

2、Truck.java

package com.ast.cglib.test;

public class Truck extends Car{

}

3、MyInterceptor.java

package com.ast.cglib.test;

import java.lang.reflect.Method;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

public class MyInterceptor implements MethodInterceptor{

	@Override
	public Object intercept(Object invoker, Method method, Object[] args,
			MethodProxy proxy) throws Throwable {
		
		System.out.println("NewCarInterceptor intercept before invoke");
		
		Object result = proxy.invokeSuper(invoker, args);
		
		System.out.println("NewCarInterceptor intercept after invoke");
		
		return result;
	}

}

4、MyCallbackFilter.java

package com.ast.cglib.test;

import java.lang.reflect.Method;

import net.sf.cglib.proxy.CallbackFilter;

public class MyCallbackFilter implements CallbackFilter {
	
	public int accept(Method method) {
		if (method.getName().equals("NewTruck")) {
			return 0;
		} else {
			return 1;
		}
	}
}

5、CarFactory.java

package com.ast.cglib.test;

import net.sf.cglib.proxy.Callback;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.NoOp;

public class CarFactory{
	public Car NewCar()
	{
		System.out.println("CarFactory NewCar");
		return new Car();
	}
	
	public Truck NewTruck()
	{
		System.out.println("CarFactory NewTruck");
		return new Truck();
	}
	
	public static void EnhancerTest()
	{
		Callback[] callbacks = new Callback[] {new MyInterceptor(),  NoOp.INSTANCE};
		Enhancer enhancer = new Enhancer();
		enhancer.setSuperclass(CarFactory.class);
		enhancer.setCallbacks(callbacks);
		enhancer.setCallbackFilter(new MyCallbackFilter());
		
		CarFactory fac = (CarFactory)enhancer.create();
		//NoOp
		fac.NewCar();
		//MyInterceptor
		fac.NewTruck();
	}
	
	public static void main(String[] args)
	{
		CarFactory.EnhancerTest();
	}
}

CGlib类型整合范例Mixin

Posted on 2012/10/22 by neohope — No Comments ↓

1、IA1.java

package com.ast.cglib.test;

public interface IA1 {
	void methodA1();
}

2、IA2.java

package com.ast.cglib.test;

public interface IA2 {
	void methodA2();
}

3、A1Impl.java

package com.ast.cglib.test;

public class A1Impl implements IA1{

	@Override
	public void methodA1() {
		System.out.println("A1Impl methodA1");
	}

}

4、A2Impl.java

package com.ast.cglib.test;

public class A2Impl implements IA2{

	@Override
	public void methodA2() {
		System.out.println("A2Impl methodA2");
	}

}

5、MixinTest.java

package com.ast.cglib.test;

import net.sf.cglib.proxy.Mixin;

public class MixinTest {
	public static void main(String[] args) {

		Class[] interfaces = new Class[] { IA1.class, IA2.class };

		Object[] delegates = new Object[] { new A1Impl(), new A2Impl() };

		Object obj = Mixin.create(interfaces, delegates);

		IA1 a1 = (IA1) obj;
		a1.methodA1();

		IA2 a2 = (IA2) obj;
		a2.methodA2();
	}
}

CGlib动态代理范例

Posted on 2012/10/22 by neohope — No Comments ↓

1、ProxyFactory.java

package com.ats.proxy;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

public class ProxyFactory implements MethodInterceptor{
	//private Object invoker;
	private List<Object> interceptors;
	
	private ProxyFactory(Object invoker,List<Object> interceptors)
	{
		//this.invoker = invoker;
		if(interceptors==null)
		{
			this.interceptors = new ArrayList<Object>();
		}
		else
		{
			this.interceptors = interceptors;
		}
	}
	
	 public static final Object newInstance(Object invoker,List<Object> interceptors)
	 {
		 Enhancer enhancer = new Enhancer();
		 enhancer.setSuperclass(invoker.getClass());
		 enhancer.setCallback(new ProxyFactory(invoker,interceptors));
		 return enhancer.create();
	 }
	
	@Override
	public Object intercept(Object invoker, Method method, Object[] args,
			MethodProxy proxy) throws Throwable {
		
		Object result = null;
		
		for(Object o : interceptors)
		{
			if(o instanceof IProxyBefore)
			{
				((IProxyBefore)o).BeforeInvoke();
			}
		}
		
		try
		{
			result = proxy.invokeSuper(invoker, args);
		}
		catch(Exception ex)
		{
			for(Object o : interceptors)
			{
				if(o instanceof IProxyThrow)
				{
					((IProxyThrow)o).ThrowInvoke();
				}
			}
		}
		
		for(Object o : interceptors)
		{
			if(o instanceof IProxyAfter)
			{
				((IProxyAfter)o).AfterInvoke();
			}
		}
		
		return result;
	}
}

2、IProxyBefore.java

package com.ats.proxy;

public interface IProxyBefore {
	public void BeforeInvoke();
}

3、IProxyAfter.java

package com.ats.proxy;

public interface IProxyAfter {
	public void AfterInvoke();
}

4、IProxyAround.java

package com.ats.proxy;

public interface IProxyAround extends IProxyBefore,IProxyAfter{
}

5、IProxyThrow.java

[code lang="java"]
package com.ats.proxy;

public interface IProxyThrow {
	public void ThrowInvoke();
}

6、Car.java

package com.ats.test;

public class Car {
	public Car()
	{
		System.out.println("This is a new Car");
	}
}

7、CarFactoryBefore.java

package com.ats.test;

import com.ats.proxy.IProxyBefore;

public class CarFactoryBefore implements IProxyBefore{

	@Override
	public void BeforeInvoke() {
		System.out.println("CarFactoryBefore BeforeInvoke");
	}

}

8、CarFactoryAfter.java

package com.ats.test;

import com.ats.proxy.IProxyAfter;

public class CarFactoryAfter implements IProxyAfter {

	@Override
	public void AfterInvoke() {
		System.out.println("CarFactoryAfter AfterInvoke");
	}

}

9、CarFactoryAround.java

package com.ats.test;

import com.ats.proxy.IProxyAround;

public class CarFactoryAround implements IProxyAround{
	@Override
	public void AfterInvoke() {
		System.out.println("CarFactoryAround AfterInvoke");
	}
	
	@Override
	public void BeforeInvoke() {
		System.out.println("CarFactoryAround BeforeInvoke");
	}
}

10、CarFactoryThrow.java

package com.ats.test;

import com.ats.proxy.IProxyThrow;

public class CarFactoryThrow implements IProxyThrow {
	@Override
	public void ThrowInvoke() {
		System.out.println("CarFactory ThrowInvoke");
	}
}

11、ProxyFactory.java

package com.ats.test;

import java.util.ArrayList;
import java.util.List;

import com.ats.proxy.ProxyFactory;

public class CarFactory{
	public Car NewCar()
	{
		return new Car();
	}
	
	public static void main(String[] args)
	{
		CarFactory fac = new CarFactory();
		CarFactoryAfter after = new CarFactoryAfter();
		CarFactoryBefore before = new CarFactoryBefore();
		CarFactoryAround around = new CarFactoryAround();
		CarFactoryThrow _throw = new CarFactoryThrow();
		List<Object> l = new ArrayList<Object>();
		l.add(after);
		l.add(before);
		l.add(around);
		l.add(_throw);
		
		CarFactory fac1=(CarFactory)ProxyFactory.newInstance(fac, l);
		fac1.NewCar();
	}
}

JDK动态代理范例

Posted on 2012/10/22 by neohope — No Comments ↓

1、ProxyFactory.java

package com.ats.proxy;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

public class ProxyFactory implements InvocationHandler{
	private Object invoker;
	private List<Object> interceptors;
	
	private ProxyFactory(Object invoker,List<Object> interceptors)
	{
		this.invoker = invoker;
		if(interceptors==null)
		{
			this.interceptors = new ArrayList<Object>();
		}
		else
		{
			this.interceptors = interceptors;
		}
	}
	
    public static final Object newInstance(Object invoker,List<Object> interceptors)
    {
        return java.lang.reflect.Proxy.newProxyInstance(invoker.getClass().getClassLoader(),
        		invoker.getClass().getInterfaces(), new ProxyFactory(invoker,interceptors));
    }
	
	@Override
	public Object invoke(Object proxy, Method method, Object[] args)
			throws Throwable {
		Object result = null;
		
		for(Object o : interceptors)
		{
			if(o instanceof IProxyBefore)
			{
				((IProxyBefore)o).BeforeInvoke();
			}
		}
		
		try
		{
			result = method.invoke(invoker, args);
		}
		catch(Exception ex)
		{
			for(Object o : interceptors)
			{
				if(o instanceof IProxyThrow)
				{
					((IProxyThrow)o).ThrowInvoke();
				}
			}
		}
		
		for(Object o : interceptors)
		{
			if(o instanceof IProxyAfter)
			{
				((IProxyAfter)o).AfterInvoke();
			}
		}
		return result;
	}
}

2、IProxyBefore.java

package com.ats.proxy;

public interface IProxyBefore {
	public void BeforeInvoke();
}

3、IProxyAfter.java

package com.ats.proxy;

public interface IProxyAfter {
	public void AfterInvoke();
}

4、IProxyAround.java

package com.ats.proxy;

public interface IProxyAround extends IProxyBefore,IProxyAfter{
}

5、IProxyThrow.java

package com.ats.proxy;

public interface IProxyThrow {
	public void ThrowInvoke();
}

6、ICarFactory.java

package com.ats.test;

public interface ICarFactory {
	public Car NewCar();
}

7、Car.java

package com.ats.test;

public class Car {
	public Car()
	{
		System.out.println("This is a new Car");
	}
}

8、IProxyBefore.java

package com.ats.test;

import com.ats.proxy.IProxyBefore;

public class CarFactoryBefore implements IProxyBefore{

	@Override
	public void BeforeInvoke() {
		System.out.println("CarFactoryBefore BeforeInvoke");
	}

}

9、CarFactoryAfter.java

package com.ats.test;

import com.ats.proxy.IProxyAfter;

public class CarFactoryAfter implements IProxyAfter {

	@Override
	public void AfterInvoke() {
		System.out.println("CarFactoryAfter AfterInvoke");
	}

}

10、CarFactoryAround .java

package com.ats.test;

import com.ats.proxy.IProxyAround;

public class CarFactoryAround implements IProxyAround{
	@Override
	public void AfterInvoke() {
		System.out.println("CarFactoryAround AfterInvoke");
	}
	
	@Override
	public void BeforeInvoke() {
		System.out.println("CarFactoryAround BeforeInvoke");
	}
}

11、CarFactoryThrow.java

package com.ats.test;

import com.ats.proxy.IProxyThrow;

public class CarFactoryThrow implements IProxyThrow {
	@Override
	public void ThrowInvoke() {
		System.out.println("CarFactory ThrowInvoke");
	}
}

12、CarFactory.java

package com.ats.test;

import java.util.ArrayList;
import java.util.List;

import com.ats.proxy.IProxyAround;
import com.ats.proxy.IProxyThrow;
import com.ats.proxy.ProxyFactory;

public class CarFactory implements ICarFactory {
	public Car NewCar()
	{
		return new Car();
	}
	
	public static void main(String[] args)
	{
		CarFactory fac = new CarFactory();
		CarFactoryAfter after = new CarFactoryAfter();
		CarFactoryBefore before = new CarFactoryBefore();
		CarFactoryAround around = new CarFactoryAround();
		CarFactoryThrow _throw = new CarFactoryThrow();
		List<Object> l = new ArrayList<Object>();
		l.add(after);
		l.add(before);
		l.add(around);
		l.add(_throw);
		
		ICarFactory factory = (ICarFactory)ProxyFactory.newInstance(fac,l);
		factory.NewCar();
	}
}

CMD常用命令12切换网络

Posted on 2012/10/17 by neohope — No Comments ↓

1、切换为DHCP

@netsh interface ip set address name="本地连接" source=dhcp

@netsh interface ip set dns name="本地连接" source=dhcp

2、切换为静态IP

@netsh interface ip set address name="本地连接" source=static addr=xxx.xxx.xxx.xxx mask=255.255.255.0 gateway=xxx.xxx.xxx.xxx

@netsh interface ip set dns name="本地连接" source=static addr=xxx.xxx.xxx.xxx

CMD常用命令11获取上一次命令行执行结果

Posted on 2012/09/04 by neohope — No Comments ↓

获取上一次执行结果：

Linux:

echo $?

Win:

echo %ERRORLEVEL%

JKS密码验证

Posted on 2012/08/06 by neohope — No Comments ↓

下面的程序用来验证JKS的文件及密码是否正确

public static URL getStoreURL(String storePath) throws IOException
{
	URL url = null;
	// First see if this is a URL
	try
	{
		url = new URL(storePath);
	}
	catch (MalformedURLException e)
	{
		// Not a URL or a protocol without a handler so...
		// next try to locate this as file path
		File tst = new File(storePath);
		if (tst.exists() == true)
		{
			url = tst.toURL();
		} else
		{
			// not a file either, lastly try to locate this as a classpath
			// resource
			if (url == null)
			{
				ClassLoader loader = Thread.currentThread().getContextClassLoader();
				url = loader.getResource(storePath);
			}
		}
	}
	// Fail if no valid key store was located
	if (url == null)
	{
		String msg = "Failed to find url=" + storePath + " as a URL, file or resource";
		throw new MalformedURLException(msg);
	}
	return url;
}

public static KeyStore loadKeyStore(String storeType, URL storePathURL, String storePassword) throws Exception
{
	KeyStore keyStore = null;
	String provider = null;
	String providerName = null;

	if (provider != null)
	{
		keyStore = KeyStore.getInstance(storeType, provider);
	} else
		if (providerName != null)
		{
			keyStore = KeyStore.getInstance(storeType, providerName);
		} else
		{
			keyStore = KeyStore.getInstance(storeType);
		}
	if (storePathURL == null) { throw new Exception("Can not find store file for url because store url is null."); }
	// now that keystore instance created, need to load data from file
	InputStream keyStoreInputStream = null;
	try
	{
		keyStoreInputStream = storePathURL.openStream();
		// is ok for password to be null, as will just be used to check
		// integrity of store
		char[] password = storePassword != null ? storePassword.toCharArray() : null;
		keyStore.load(keyStoreInputStream, password);
	}
	finally
	{
		if (keyStoreInputStream != null)
		{
			try
			{
				keyStoreInputStream.close();
			}
			catch (IOException e)
			{
				// no op
			}
			keyStoreInputStream = null;
		}
	}
	return keyStore;
}

public static String verifyP12(String p12Path,String p12Pwd)
{
            String ret = "验证成功";
            try
            {
	URL ksURL = getStoreURL(p12Path);
                if(ksURL==null)throw new Exception(p12Path+"文件未找到");
                    
	loadKeyStore("PKCS12",ksURL,p12Pwd);
            }
            catch(Exception ex)
            {
                ret = ex.getMessage();
                ex.printStackTrace();
            }
            return ret;
}

public static String verifyJks(String jksPath,String jksPwd)
{
            String ret = "验证成功";
            try
            {
	URL ksURL = getStoreURL(jksPath);
	loadKeyStore("JKS",ksURL,jksPwd);
                
                if(ksURL==null)throw new Exception(jksPath+"文件未找到");
            }
            catch(Exception ex)
            {
                ret = ex.getMessage();
                ex.printStackTrace();
            }
            
            return ret;
}

keytool生成key

Posted on 2012/08/06 by neohope — No Comments ↓

生成keystore及cert

#生成私钥
keytool -genkey -validity 10000 -keyalg RSA -dname "CN=neohope OU=neohope O=neohope L=Shanghai C=CN" -keystore node1.jks -alias node1 -keypass password -storepass password 
#导出证书
keytool -export -file node1.crt -keystore node1.jks -alias node1 -keypass password -storepass password 
#生成truststore
keytool -import -trustcacerts -file node1.crt -keystore trust.jks -alias node1 -keypass password -storepass password 
#查看
keytool -list -keystore node1.jks
keytool -list -keystore trust.jks

jks转p12

keytool -importkeystore -srckeystore node1.jks -srcstoretype JKS -deststoretype PKCS12 -destkeystore node1.p12 -srcstorepass password -deststorepass password