Reference book: "Java EE open source programming Essentials 15"
Struts support for internationalization
"Internationalization" (i18n) means that an application can display different user interfaces at run time, depending on the country/region or language in which the client request is made. To internationalize with struts, the "tag" information for various language versions is stored in a different attribute file, one for each language version. The filename suffix must be properties, the prefix name is determined by the developer, and the language Type field must be a valid ISO (international standardization Organization, International Organization for Standardization) language code, such as: Chinese-zh, English-en and so on. The filename prefix is the default (the book says "default", but I feel it should be "no") language code as the default property file. The default property file is used when the system cannot find a property file that matches the language properties requested by the client.
International processing of the login system in the introduction to struts
1) first create the English and Chinese version of the resource file
Applicationresources.properties
View Code1 Title.login=login Page 2 Label.username=input your username 3 label.password=input Your password 4 Item.submit=submit 5 Item.reset=reset 6 Message.success=you ' re successful to login in. 7 message.failure=you fail to login
Applicationresources_zh.properties
View Code1 title.login=\u767b\u9646\u9875\u9762 2 label.username=\u59d3\u540d 3 label.password=\u5bc6\u7801 4 item.submit=\u767b\u9646 5 item.reset=\u91cd\u7f6e 6 message.success=\u4f60\u5df2\u6210\u529f\u767b\u9646 7 Message.failure=\u4f60\u767b\u9646\u5931\u8d25
PS: Create a new applicationresources_zh.properties in MyEclipse, select the Properties window in the edit area, and after adding the key value pairs, the Chinese transcoding will be automatically
2) configuration in Struts-config.xml
<message-resources parameter= "Struts/applicationresources"/> (the parameter attribute depends on the location of the property file in the project, where the file is within the struts package)
3) Modify the page, use the <bean:message> tag to read the tag information from the resource file instead of the original character text
1 <%@ Page Language="Java"pageencoding="UTF-8"%>2 <%@ taglib URI="Http://struts.apache.org/tags-bean"prefix="Bean"%> 3 <%@ taglib URI="http://struts.apache.org/tags-html"prefix="HTML"%>4 5 <HTML> 6 <Head>7 <title><Bean:messageKey= "Title.login"/></title>8 </Head>9 <Body>Ten <Html:formAction= "/login"> One <Bean:messageKey= "Label.username"/>:<Html:text Property= "username"/><html:errors Property= "username"/><BR/> A <Bean:messageKey= "Label.password"/>:<Html:password Property= "Password"/><html:errors Property= "Password"/><BR/> - <Html:submit Property= "Submit"> - <Bean:messageKey= "Item.submit"/> the </Html:submit> - </Html:form> - </Body> - </HTML>View Code
When only the default resource file, the landing page is displayed in English, when the Chinese version of the resource file is added, the landing page displays Chinese
Dispatchaction class
Typically only one business operation is completed in an action Class (execute (), but in fact it is possible to invoke different methods in the Execute () method depending on the arguments passed in), creating a subclass of the extended dispatchaction without overwriting the Execute () method, Instead, you create methods that implement specific business logic operations that have the same parameters and return values as the Execute () method, such as
1 Public classMydispatchactionextendsdispatchaction {2 Publicactionforward Add (actionmapping Mapping, actionform form,3 httpservletrequest request, httpservletresponse response) {4 //TODO auto-generated Method Stub5 returnMapping.findforward ("Add");6 }7 PublicActionforward Edit (actionmapping mapping, actionform form,8 httpservletrequest request, httpservletresponse response) {9 //TODO auto-generated Method StubTen returnMapping.findforward ("Edit"); One } A}View Code
When configuring the Dispatchaction class, you need to specify the parameter property as method
When writing code that triggers dispatchaction, not only does it indicate the mapping path, but it also needs to add a parameter called method, such as
Http://localhost:8080/login/users?method=add
Call the Add method for the corresponding dispatchaction
Dynamic Actionform
If you add or remove attributes from the corresponding HTML form, the Actionfrom class may need to modify the actionform and introduce the concept of dynamic actionform (Dynaactionform). Dynamic Actionform allows users to create specific Actionform classes for each HTML form of an application.
Dynamic Actionform supports the complete configuration of actionform in the Struts profile struts-config.xml without the need to write additional Java code. Such as:
1 <Form-beans>2 <Form-beanname= "LoginForm"type= "Org.apache.struts.action.DynaActionForm" >3 <Form-propertyname= "username"type= "Java.lang.String" />4 <Form-propertyname= "Password"type= "Java.lang.String" />5 </Form-bean>6 </Form-beans>View Code
The Type property of the <form-bean> element is set to Dynaactionform or its subclasses. <form-bean> contains the properties of the <form-property> child element tag dynamic form, the type attribute specifies the property type, the property type must be a standard Java class, and uses their wrapper class, such as Int-integer, Long-long,float-float,double-double,boolean-boolean.
When you need to add a new type, you only need to modify the configuration file (). Accessing the dynamic Actionform in action
1 dynaactionform loginform = (dynaactionform) Form; 2 string username= (String) loginform.get ("username"); 3 string password= (String) loginform.get ("password");Validator Validation Framework
By configuring validation rules to implement validation, you do not need to write code to maximize the reuse of the same validation rule. Need to use Validator-rules.xml and validation.xml files, validator-rules.xml file contains a set of common validation rules, generally do not need to modify, directly deployed in the corresponding Web-inf folder; Validation.xml by the Open By the sender.
For details, please see:
Http://www.blogjava.net/nokiaguy/archive/2009/02/12/254421.html
Internationalization Example Simple login system: Http://pan.baidu.com/s/1bnhKAcR
The main components of Java Web programming technology--struts Advanced Features
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
