Grails入门之二：一切从Hello World开始

Grails是个典型的遵照MVC模式开发的框架，至少包含了以下3个部分：控制器(Controllers)、领域(Domain)对象(模型)、视图(Views)。既然环境配置好了，Hello项目的基本构架也通过grails create-app hello创建好了，下面进入第一个grails例子。

进入hello项目文件夹(>cd hello)，输入 grails create-controller hello

E:\Groovy\projects\hello>grails create-controller hello
2

Welcome to Grails 1.0.4 - http://grails.org/
4

Licensed under Apache Standard License 2.0
5

Grails home is set to: E:\Groovy\grails-1.0.4
6

Base Directory: E:\Groovy\projects\hello
8

Note: No plugin scripts found
9

Running script E:\Groovy\grails-1.0.4\scripts\CreateController.groovy
10

Environment set to development
11

[copy] Copying 1 file to E:\Groovy\projects\hello\grails-app\controllers
12

Created Controller for Hello
13

[mkdir] Created dir: E:\Groovy\projects\hello\grails-app\views\hello
14

[copy] Copying 1 file to E:\Groovy\projects\hello\test\integration
15

Created ControllerTests for Hello

这样，在grails-app/controller目录下自动生成HelloController.groovy文件，同时grails-test下生成HelloControllerTest.groovy测试文件。
我们编辑HelloController控制器，在index{}中输出Hello World.其中，index是系统默认的操作，相当于JSP中的index.jsp。

1 class HelloController {
2 def index = {render 'Hello world!' }
3 }

运行项目 grails run-app

E:\Groovy\projects\hello>grails run-app
2

Welcome to Grails 1.0.4 - http://grails.org/
4

Licensed under Apache Standard License 2.0
5

Grails home is set to: E:\Groovy\grails-1.0.4
6

Base Directory: E:\Groovy\projects\hello
8

Note: No plugin scripts found
9

Running script E:\Groovy\grails-1.0.4\scripts\RunApp.groovy
10

Environment set to development
11

[groovyc] Compiling 7 source files to C:\Documents and Settings\Administrator\.grails\1.0.4\projects\hello\classes
12

[native2ascii] Converting 11 files from E:\Groovy\projects\hello\grails-app\i18n to C:\Documents and Settings\Administrator\.grails\1.0.4\projects\hello\resources\grails-app\i18n
13

[copy] Copying 1 file to C:\Documents and Settings\Administrator\.grails\1.0.4\projects\hello\classes
14

[copy] Copying 1 file to C:\Documents and Settings\Administrator\.grails\1.0.4\projects\hello\resources
15

[copy] Copying 1 file to C:\Documents and Settings\Administrator\.grails\1.0.4\projects\hello
16

Running Grails application..
17

2009-03-12 20:00:01.183::INFO: Logging to STDERR via org.mortbay.log.StdErrLog
18

2009-03-12 20:00:01.402::INFO: jetty-6.1.12
19

2009-03-12 20:00:02.652::INFO: No Transaction manager found - if your webapp requires one, please configure one.
20

2009-03-12 20:00:02.308:/hello:INFO: Set web app root system property: 'hello-development-0.1' = [E:\Groovy\projects\hello\web-app]
21

2009-03-12 20:00:02.308:/hello:INFO: Initializing log4j from [file:C:\Documents and Settings\Administrator/.grails/1.0.4/projects/hello/resources/log4j.properties]
22

2009-03-12 20:00:02.340:/hello:INFO: Initializing Spring root WebApplicationContext
23

[0] spring.GrailsWebApplicationContext Refreshing org.codehaus.groovy.grails.commons.spring.GrailsWebApplicationContext@396c7: display name [org.codehaus.groovy.grails.commons.spring.GrailsWebApplicationContext@396c7]; startup date [Thu Mar 12 20:00:05 CST 2009]; parent: org.springframework.web.context.support.XmlWebApplicationContext@1e7c609
24

[0] spring.GrailsWebApplicationContext Bean factory for application context [org.codehaus.groovy.grails.commons.spring.GrailsWebApplicationContext@396c7]: org.springframework.beans.factory.support.DefaultListableBeanFactory@c4c05
25

2009-03-12 20:00:08.179:/hello:INFO: Initializing Spring FrameworkServlet 'grails'
26

2009-03-12 20:00:09.445::INFO: Started SelectChannelConnector@0.0.0.0:8080
27

Server running. Browse to http://localhost:8080/hello

打开浏览器，输入http://localhost:8080/hello/hello/index 查看运行结果

地址栏中，第一个hello为项目名，第二hello为控制器名，index为操作名。

最基本的一个入门程序写完了，除了手工编写外，我们还可以使用NetBeans作为开发IDE，大大简化开发流程。至少不用记那么多命令了哈！

posted on 2009-03-12 18:12 Rique 阅读(1100) 评论(0) 编辑收藏所属分类: Groovy涉猎

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