(3)在ch5包内建立一个业务控制器Reg,如代码5.10所示。
代码5.10 HelloWorld拦截器示例的业务控制器
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(4)同样在ch5包内,建立一个用户注册reg.jsp文件和一个用于显示注册成功信息的success.jsp文件。内容分别如代码5.11和代码5.12所示。
代码5.11 用户注册界面reg.jsp
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代码5.12 注册成功界面success.jsp
扫描二维码关注公众号,回复:
811467 查看本文章
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(5) 启动Tomcat服务器,在浏览器中输入:http://localhost:8080/bookcode/ch5/reg.jsp,运行界面如图5.6所示。
图5.6 HelloWorld拦截器的注册界面
(6)读者可以在“用户名”、“密码”、“确认密码”和“生日”输入框中填入相关字符串,单击“注册”按钮,会发现Tomcat控制台输出如下信息:
… …
信息: Detected AnnotationActionValidatorManager, initializing it...
拦截器信息:HelloWorld拦截器!
Action信息:正在执行Actiion... ...
拦截器信息:Action执行完毕!
… …
到此为止,第一个拦截器HelloWorld示例就建立成功了,读者通过本示例,可以了解拦截器的基本功能。
★ 说明 ★
Struts 2框架提供的拦截器功能确实给项目开发提供了一个非常有用的手段。后面笔者将会逐步深入介绍Struts 2的拦截器。