java中的反射机制详解（Reflection mechanism in Java）.docVIP

java中的反射机制详解（Reflection mechanism in Java） Detailed reflection mechanism in JAVA based JAVA Release time: 2007.09.25 04:42 source: CCID technology community Author: baocl JAVA reflex mechanism JAVA reflection mechanism is in the running state, for any one class, are able to know all the properties and methods of the class; for an arbitrary object can call it any one method; this method of dynamic information and dynamic call object function called reflection mechanism for the Java language. Java reflection mechanism provides the following functions: to determine an arbitrary object class at runtime; object to construct an arbitrary class at runtime; judging member variables and methods with an arbitrary class at runtime; method is invoked at runtime an arbitrary object; dynamic proxy. 1. get the properties of an object 1, public, Object, getProperty (Object, owner, String, fieldName), throws, Exception { 2 Class ownerClass = owner.getClass (); Three 4 Field field = ownerClass.getField (fieldName); Five 6 Object property = field.get (owner); Seven 8 return property; 9} Class ownerClass = owner.getClass (): get the Class of this object. Field field = ownerClass.getField (fieldName): properties of class declarations are obtained through Class. Object property = field.get (owner): an instance of this property is obtained through an object, and if this property is non-public, it is reported to IllegalAccessException. 2. gets the static property of a class 1, public, Object, getStaticProperty (String, className, String, fieldName) 2 throws Exception { 3 Class ownerClass = Class.forName (className); Four 5 Field field = ownerClass.getField (fieldName); Six 7 Object property = field.get (ownerClass); Eight 9 return property; 10} Class ownerClass = Class.forName (className): first, get the Class of this class. Field field = ownerClass.getField (fieldName): like above, the attributes of class declarations are obtained through Class. Object property = field.get (ownerClass): h