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

				/**
				 * @version $Revision: 2284 $
				 */
				class Bytecode6Bug extends GroovyTestCase {
				
				    void testPostFixReturn() {
				        def i = 1
				        def closure = { i++ }
				        def value = closure()
				        
				        assert value == 1
				        assert i == 2
				    }
				    
				    void testPreFixReturn() {
				        def i = 1
				        def closure = { return ++i }
				        def value = closure()
				        
				        assert value == 2
				        assert i == 2
				    }
				}