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Groovy Intro

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Ocean Dong

This document introduces the Groovy programming language and summarizes some of its key features. It discusses how Groovy combines the power of Java with the lightweight syntax of dynamic languages like Ruby. Some highlighted features include: dynamic typing, direct property access, powerful string interpolation, simple collection types, operator overloading, switch statements, closures, and more. The document encourages readers to explore Groovy further on its website.

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Groovy: Fly Beyond Java Copyright ? 2001-2008 Infor Global Solutions
Agenda Why Groovy Appears How Groovy Rocks
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³ÌÐòÔ±µÄÃÎÏë д³ÌÐò ÅÝÍø Îç·¹ ºÍÃÀüÍøÁÄ ´òÓÎÏ· Ï°à
Copyright ? 2001-2006 Infor Global Solutions ÄÄÖÖ±à³ÌÓïÑÔ¸ü¡°ºÃ¡±£¿ Òå Áx ºÃ µÄ±à³ÌÓïÑÔÒ²ÐíÓ¦¸Ã¸üÏñÊÇÒ»ÃÅ ¡° ÓïÑÔ ¡±
Copyright ? 2001-2006 Infor Global Solutions ÓÚÊÇ Groovy µ®ÉúÁË Groovy ʹµÃ Java ¸ü¡° ÓïÑÔ ¡± Java µÄ Ç¿´ó¼¼Êõ Àà Ruby µÈ¶¯Ì¬ÓïÑÔ µÄÇáÓ¯Óï·¨ Groovy
Copyright ? 2001-2006 Infor Global Solutions »¶Ó­À´µ½¼ò½àÃÀÃîµÄ Groovy ÊÀ½ç
Copyright ? 2001-2006 Infor Global Solutions ±ðÔÚºõÀàÐÍ Java: String name = ¡°abc¡±; Groovy: String name = ¡°abc¡± def name name = ¡°abc¡±
Copyright ? 2001-2006 Infor Global Solutions ¡° Ö±½Ó¡±·ÃÎÊÊôÐÔ class Person { private String name; public Person(String name) {this.name = name;} public String getName() {return name;} } Person person = new person(¡°ocean¡±) return person.getName(); class Person { String name; } Person person = new Person(name:¡±ocean¡±) return person .name
Copyright ? 2001-2006 Infor Global Solutions Á˲»ÆðµÄ×Ö·û´® firstName = ¡°ocean¡± lastName = ¡°dong¡± message = ¡°My name is $ firstName $ lastName¡± person = new Person() person.setName(¡°ocean¡±) message = ¡°My name is ${ person.name } ¡± Message = ¡° ¡°¡° Hi, My name is ${person.name} ¡±¡±¡± def pattern = / hello.* /
Copyright ? 2001-2006 Infor Global Solutions ¼¯ºÏ£º¼òµ¥ÀàÐͶøÒÑ List: def aList = [1, 2, 3] def aList = [10, ¡°abc¡±, new Date()] Map: def aMap = [a:1, b:2] Range: def aRange = ¡®a¡¯..¡¯z¡¯ def numbers = 0..<10
Copyright ? 2001-2006 Infor Global Solutions ¿É°®µÄ²Ù×÷·û [1, 2, 3] << 4 def aMap = [a:1, b:2] println aMap . a println aMap [ a ] ¡° hello world¡± =~ /hello.*/ println person ? .wife ? .name
Copyright ? 2001-2006 Infor Global Solutions ÍòÎï½Ô¿ÉÅÐ¶Ï If(1) assert 1 def aList = [1, 2, 3] If(aList) assert aList def person If(person) assert !person
Copyright ? 2001-2006 Infor Global Solutions ËÄͨ°Ë´ïµÄ Switch switch(10) { case 0: case 0..9: case [8,9,11]: case Float: case {it % 3 == 0}: case ~/../: default: }
Copyright ? 2001-2006 Infor Global Solutions ͸Ã÷µÄ¼¯ºÏ ArrayList names = new ArrayList() for(Person person : persons) { names.add(person.getName()); } return names; def persons = [new Person(¡±ocean¡±), new Person(¡±coco¡±)] assert persons .name == [¡°ocean¡±, ¡°coco¡±] assert persons *.getGender() == [¡°Male¡±, ¡°Female¡±]
Copyright ? 2001-2006 Infor Global Solutions Closure: ÖÕ¼«´úÂëÖØÓà ArrayList persons = ¡­ for(Person person : persons) { System.out.println(person.getName()); } persons.each {it -> println it.name }
Copyright ? 2001-2006 Infor Global Solutions Ô¶Ô¶²»Ö¹ÕâЩŶ¡£¡£¡£ Builder Meta Programming Groovylet GSP GRails Scriptom Griffon GMaven Gant GSQL GORM Tellurium http://groovy.codehaus.org/
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Groovy Intro

  • 1. Groovy: Fly Beyond Java Copyright ? 2001-2008 Infor Global Solutions
  • 2. Agenda Why Groovy Appears How Groovy Rocks
  • 3. ʲ ôÊÇ ºÃ µÄ³ÌÐòÓïÑÔ£¿
  • 5. ³ÌÐòÔ±µÄÃÎÏë д³ÌÐò ÅÝÍø Îç·¹ ºÍÃÀüÍøÁÄ ´òÓÎÏ· Ï°à
  • 6. Copyright ? 2001-2006 Infor Global Solutions ÄÄÖÖ±à³ÌÓïÑÔ¸ü¡°ºÃ¡±£¿ Òå Áx ºÃ µÄ±à³ÌÓïÑÔÒ²ÐíÓ¦¸Ã¸üÏñÊÇÒ»ÃÅ ¡° ÓïÑÔ ¡±
  • 7. Copyright ? 2001-2006 Infor Global Solutions ÓÚÊÇ Groovy µ®ÉúÁË Groovy ʹµÃ Java ¸ü¡° ÓïÑÔ ¡± Java µÄ Ç¿´ó¼¼Êõ Àà Ruby µÈ¶¯Ì¬ÓïÑÔ µÄÇáÓ¯Óï·¨ Groovy
  • 8. Copyright ? 2001-2006 Infor Global Solutions »¶Ó­À´µ½¼ò½àÃÀÃîµÄ Groovy ÊÀ½ç
  • 9. Copyright ? 2001-2006 Infor Global Solutions ±ðÔÚºõÀàÐÍ Java: String name = ¡°abc¡±; Groovy: String name = ¡°abc¡± def name name = ¡°abc¡±
  • 10. Copyright ? 2001-2006 Infor Global Solutions ¡° Ö±½Ó¡±·ÃÎÊÊôÐÔ class Person { private String name; public Person(String name) {this.name = name;} public String getName() {return name;} } Person person = new person(¡°ocean¡±) return person.getName(); class Person { String name; } Person person = new Person(name:¡±ocean¡±) return person .name
  • 11. Copyright ? 2001-2006 Infor Global Solutions Á˲»ÆðµÄ×Ö·û´® firstName = ¡°ocean¡± lastName = ¡°dong¡± message = ¡°My name is $ firstName $ lastName¡± person = new Person() person.setName(¡°ocean¡±) message = ¡°My name is ${ person.name } ¡± Message = ¡° ¡°¡° Hi, My name is ${person.name} ¡±¡±¡± def pattern = / hello.* /
  • 12. Copyright ? 2001-2006 Infor Global Solutions ¼¯ºÏ£º¼òµ¥ÀàÐͶøÒÑ List: def aList = [1, 2, 3] def aList = [10, ¡°abc¡±, new Date()] Map: def aMap = [a:1, b:2] Range: def aRange = ¡®a¡¯..¡¯z¡¯ def numbers = 0..<10
  • 13. Copyright ? 2001-2006 Infor Global Solutions ¿É°®µÄ²Ù×÷·û [1, 2, 3] << 4 def aMap = [a:1, b:2] println aMap . a println aMap [ a ] ¡° hello world¡± =~ /hello.*/ println person ? .wife ? .name
  • 14. Copyright ? 2001-2006 Infor Global Solutions ÍòÎï½Ô¿ÉÅÐ¶Ï If(1) assert 1 def aList = [1, 2, 3] If(aList) assert aList def person If(person) assert !person
  • 15. Copyright ? 2001-2006 Infor Global Solutions ËÄͨ°Ë´ïµÄ Switch switch(10) { case 0: case 0..9: case [8,9,11]: case Float: case {it % 3 == 0}: case ~/../: default: }
  • 16. Copyright ? 2001-2006 Infor Global Solutions ͸Ã÷µÄ¼¯ºÏ ArrayList names = new ArrayList() for(Person person : persons) { names.add(person.getName()); } return names; def persons = [new Person(¡±ocean¡±), new Person(¡±coco¡±)] assert persons .name == [¡°ocean¡±, ¡°coco¡±] assert persons *.getGender() == [¡°Male¡±, ¡°Female¡±]
  • 17. Copyright ? 2001-2006 Infor Global Solutions Closure: ÖÕ¼«´úÂëÖØÓà ArrayList persons = ¡­ for(Person person : persons) { System.out.println(person.getName()); } persons.each {it -> println it.name }
  • 18. Copyright ? 2001-2006 Infor Global Solutions Ô¶Ô¶²»Ö¹ÕâЩŶ¡£¡£¡£ Builder Meta Programming Groovylet GSP GRails Scriptom Griffon GMaven Gant GSQL GORM Tellurium http://groovy.codehaus.org/

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