Reference:
1. 60秒入门教程: http://gabriel.jarchitect.org/spring/index.html
必需的jar文件包括: spring-core.jar, common-logging.jar, 在IDEA中,
运行Java虚拟机的目录并不是classes目录, 因此它在当前目录中无法找到
"bean.xml"文件, 使用下面的代码:
import org.springframework.core.io.*;
/* Read the configuration file from classpath */
Resource res = new ClassPathResource("bean.xml");
XmlBeanFactory factory = new XmlBeanFactory(res);
Category Archives: Java
Stand alone的Spring示例 (AOP)
Referneces:
1. An Introduction to Aspect-Oriented Programming with the Spring Framework, Part 1: http://www.onjava.com/lpt/a/4994
2. http://www.springframework.org/docs/wiki/Spring_AOP_Framework.html
3. SpringFrameWork中AOP的简单使用: http://blog.csdn.net/ylong/archive/2004/07/10/38482.aspx
I just copy the code from the onjava one, and implement a demo with
IDEA 4.5. But a minor change for the same issue in IoC example:
import org.springframework.context.support.ClassPathXmlApplicationContext;
// Read the configuration file from classpath
ApplicationContext ctx = new ClassPathXmlApplicationContext( "springconfig.xml");
必须的jar文件包括:
aopalliance.jar, commons-logging.jar, jakarta-oro-xxx.jar, spring-aop.jar, spring-context.jar, spring-core.jar.
Java动态代理的示例
public interface SomeClass { public abstract void someMethod(); public abstract void someOtherMethod(final String text); } public class SomeClassImpl implements SomeClass{ private String userName; public SomeClassImpl(final String userName) { this.userName = userName; } public void someMethod( ) { System.out.println(this.userName); } public void someOtherMethod(final String text) { System.out.println(text); } } import java.lang.reflect.InvocationHandler; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; public class MethodCountingHandler implements InvocationHandler { /* whatever object, you can pass one in */ private final Object impl; private int invocationCount = 0; /* constructor */ public MethodCountingHandler(final Object impl) { this.impl = impl; } /* export the invocation Count */ public int getInvocationCount( ) { return invocationCount; } /* implements the interface function of InvocationHandler */ public Object invoke(Object proxy, Method meth, Object[] args) throws Throwable { try { this.invocationCount++; Object result = meth.invoke(impl, args); return result; } catch (final InvocationTargetException ex) { throw ex.getTargetException( ); } } } import java.lang.reflect.InvocationHandler; import java.lang.reflect.Proxy; public class SomeClassFactory { public static final SomeClass getDynamicSomeClassProxy( ) { /* get a implement instance of SomeClass */ SomeClassImpl impl = new SomeClassImpl(System.getProperty("user.name")); if ( !(impl instanceof SomeClass) ) return null; /* construct a invocation handler with the impl instance */ InvocationHandler handler = new MethodCountingHandler(impl); /* get the class info, and the class loader used by this factory */ Class[] interfaces = new Class[] { SomeClass.class }; ClassLoader loader = SomeClassFactory.class.getClassLoader( ); /* * install the handler for all implementations of this interface in this class loader * and return the proxy instance which accords to SomeClass interface. */ SomeClass proxy = (SomeClass)Proxy.newProxyInstance(loader, interfaces, handler); return proxy; } } import java.lang.reflect.InvocationHandler; import java.lang.reflect.Proxy; public class DemoDynamicProxy { public static final void main(final String[] args) { SomeClass proxy = SomeClassFactory.getDynamicSomeClassProxy( ); proxy.someMethod( ); proxy.someOtherMethod("Our Proxy works!"); /* get the handler associated with this proxy instance */ InvocationHandler handler = Proxy.getInvocationHandler(proxy); if (handler instanceof MethodCountingHandler) { System.out.println(((MethodCountingHandler)handler).getInvocationCount( )); } } }
Java的动态代理只支持基于Interface的Method Interception. 本例是从”Hardcore Java”一书中摘取出来的.