java反射机制详解及method.invoke解释（Java reflection mechanism detailed explanation and method.invoke）.docVIP

java反射机制详解及method.invoke解释（Java reflection mechanism detailed explanation and method.invoke） Java reflection mechanism detailed explanation and Method.invoke Article category: Java programming 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 Java code public, Object, getProperty (Object, owner, String, fieldName) throws Exception {Class ownerClass = owner.getClass (); Field field = ownerClass.getField (fieldName); Object property = field.get (owner); Return property; } Public Object getProperty (Object owner, String fieldName) throws Exception Class (owner.getClass) {ownerClass = Field; field = ownerClass.getField; property = Object (fieldName) field.get (owner); return property;} 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 Java code Public, Object, getStaticProperty (String, className, String, fieldName) Throws Exception { Class ownerClass = Class.forName (className); Field field = ownerClass.getField (fieldName); Object property = field.get (ownerClass); Return property; } Public Object getStaticProperty (String className, St