Groovy动态语言 运行在JVM中的动态语言 可以方便的处理业务逻辑变化大的业务

				package groovy.bugs
				
				/**
				 * TODO: GROOVY-1059
				 *
				 *    Accessible to a closure attribute of an abject with the operator ".@".
				 *    For examples, all of the expressions
				 *
				 *            object.@closure()
				 *            object.@closure.call()
				 *            object.@closure.doCall()
				 *            (object.@closure)()
				 *
				 *    have the same meaning.
				 *
				 * @author  John Wilson
				 * @author  Pilho Kim
				 */
				
				class Groovy1059_Bug extends GroovyTestCase {
				
				    void testClosureAsAttribute() {
				        def x = new Groovy1059Foo()
				
				        println( x.say() )
				        println( (x.@say)() )
				        println( x.@say() )  // TODO: Groovy-1059 should work
				        println( x.@say.call() )
				        println( x.@say.doCall() )
				        println( x.@say2() )
				
				        assert "I am a Method" == x.say()
				        assert "I am a Method" == x.@say2()
				        assert "I am a Closure" == (x.@say)()
				        assert "I am a Closure" == x.@say()
				        assert x.@say() == (x.@say)()
				        assert x.@say() == x.@say.call()
				        assert x.@say() == x.@say.doCall()
				        assert x.@say() != x.say()
				        assert x.@say2() == x.say()
				    }
				
				}
				
				class Groovy1059Foo {
				
				    def public say = { it -> return "I am a Closure" }
				    def public say2 = this.&say
				
				    public Object say() {
				       return "I am a Method"
				    }
				}