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Spring in Action �W�记 (IV) -- i18n问题和自定义属性编辑器

冰雨 — Mon, 29 May 2006 03:24:00 GMT

Spring in Action �W�记 (IV) -- i18n问题和自定义属性编辑器

BY: icess Blog: http://blog.matrix.org.cn/page/icess

在Spring中处理I18N问题和��用Java里面的类基本上是一��L��.使用org.springframework.context.support.ResourceBundleMessageSource

然后注入资源文�g(一个名字�ؓbasename的属�?,然后��可以在Context中��用资源文件了, 如下��Z��个配�|�示�? test.xml

xml version = "1.0" encoding = "UTF-8" ?>

DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "spring-beans.dtd" >

beans >

< bean id = "messageSource" class = "org.springframework.context.support.ResourceBundleMessageSource" >

< property name = "basename" >

< value > test/i18n/test value >

property >

bean >

beans >

下面��源文�?test.properties

name =

\u51B0\u96E8

sex =

\u5148\u751F

test_zh.properties

name =

\u51B0\u96E8

sex =

\u5148\u751F

test_en_US.properties

name =

ice rain

sex =

male

下面是一个简单的��试�c?

package
test.i18n;

import
java.util.Locale;

import
org.springframework.context.ApplicationContext;
import
org.springframework.context.support.ClassPathXmlApplicationContext;

public
class TestI18n {

/**

* @param args

public static void main(String[] args) {

// TODO Auto-generated method stub

ApplicationContext context =

new ClassPathXmlApplicationContext( "test/i18n/test.xml" );

String text = context.getMessage(

"sex" , new Object[0], Locale. US );

String textZH = context.getMessage(

"sex" , new Object[0], Locale. CHINA );

System.

out .println(text + " 中文:" +textZH);

}

很简�?�q�样��可以了.

下面来看看Spring中的属性自定义�~�辑�?�q�个和Hibernate中的自定义属性差不多 �? 例如下面我们要看��C��例子,映射一个电话号�?�?font size="2">areaCode,prefix�?number, 如果不��用自定义属性编辑器那么��p��分别注入上面�?个代�?�ȝ��. 如果使用自定义属性编辑器,直接注入一�?分开的数字序列就可以�?�?/p>

888-666-9999

.在下面的例子中的Contact.java�c�L��个PhoneNumber属�?里面保存了上面的3个代�?两个�cȝ��代码如下:

package test.propertyEditor; public class Contact { private PhoneNumber phoneNumber; private String name; public Contact() {} public String getName() { return name; } public void setName(String name) { this .name = name; } public PhoneNumber getPhoneNumber() { return phoneNumber; } public void setPhoneNumber(PhoneNumber phoneNumber) { this .phoneNumber = phoneNumber; } }

PhoneNumber.java

package test.propertyEditor; public class PhoneNumber { private String areaCode; private String prefix; private String number; public PhoneNumber() { } public PhoneNumber(String areaCode,String prefix,String number) { this .areaCode = areaCode; this .prefix = prefix; this .number = number; } public String getAreaCode() { return areaCode; } public void setAreaCode(String areaCode) { this .areaCode = areaCode; } public String getNumber() { return number; } public void setNumber(String number) { this .number = number; } public String getPrefix() { return prefix; } public void setPrefix(String prefix) { this .prefix = prefix; } }

然后定义一个用来编辑PhoneNumber的编辑器PhoneEditor.java 如下:

package test.propertyEditor; import java.beans.PropertyEditorSupport; public class PhoneEditor extends PropertyEditorSupport { public void setAsText(String textValue) { String stripped = stripNonNumber(textValue); String areaCode = stripped.substring( 0 , 3 ); String prefix = stripped.substring( 3 , 6 ); String number = stripped.substring( 6 ); PhoneNumber phone = new PhoneNumber(areaCode,prefix,number); setValue(phone); } private String stripNonNumber(String original) { StringBuilder allNumeric = new StringBuilder(); for ( int i = 0 ; i < original.length(); i ++) { char c = original.charAt(i); if (Character.isDigit(c)) { allNumeric.append(c); } } return allNumeric.toString(); } }

�l�承java里面的属性编辑器,实现里面的一个方法就可以�? 下面��是在配�|�文件中注册该编辑器.如下:

testPropertyEditor.xml

xml version = "1.0" encoding = "UTF-8" ?>

DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "spring-beans.dtd" >

beans >

< bean id = "customEditorConfigurer" class = "org.springframework.beans.factory.config.CustomEditorConfigurer" >

< property name = "customEditors" >

< map >

< entry key = "test.propertyEditor.PhoneNumber" >

< bean id = "phoneEditor" class = "test.propertyEditor.PhoneEditor" > bean >

entry >

map >

property >

bean >

< bean id = "contact" class = "test.propertyEditor.Contact" >

< property name = "phoneNumber" >

< value > 888-666-9999 value >

property >

bean >

beans >

最后来��试一下注册的�l�果是否正确:

package test.propertyEditor; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class TestPropertyEditor { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub ApplicationContext context = new ClassPathXmlApplicationContext( "test/propertyEditor/testPropertyEditor.xml" ); Contact c = (Contact) context.getBean( "contact" ); System.out.println(c.getPhoneNumber().getAreaCode()); System.out.println(c.getPhoneNumber().getPrefix()); System.out.println(c.getPhoneNumber().getNumber()); } }

ok, 很简�?下一�ơ来看看,Spring提供的一下比较有意思的功能.如定�?发送Email�{?

冰雨 2006-05-29 11:24 发表评论

Spring in Action �W�记(III) -- 在Spring下的Hibernate数据操作

冰雨 — Sat, 27 May 2006 03:01:00 GMT

Spring in Action �W�记(III)

By: icess blog: http://blog.matrix.org.cn/page/icess

�q�次来看看��用Spring的Hibernate模板来操作数�? Spring提供了Hibernate的一层包�?使Hibernate使用��h��更加方便,��其是结合Hibernate Annotation�? 配置文�g更少,�l�护更加��? 下面来看看吧.

下面是一个测试数据实体类TestData.java 和前一��提到的实体�c�M��?只不�q�用了Annotation注释.

package test.orm.hibernate.model; import javax.persistence.Basic; import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Table; @Entity @Table(name = "test" ,schema = "APP" ) public class TestData { private int id; private String name; public TestData( int id, String name) { this .id = id; this .name = name; } public TestData() {} @Id public int getId() { return id; } public void setId( int id) { this .id = id; } @Basic public String getName() { return name; } public void setName(String name) { this .name = name; } }

下面是测试Hibernate模板的类, TestHibernateTemplate.java

package test.orm.hibernate; import java.sql.SQLException; import org.hibernate.HibernateException; import org.hibernate.Session; import org.springframework.orm.hibernate3.HibernateCallback; import org.springframework.orm.hibernate3.HibernateTemplate; import test.orm.hibernate.model.TestData; public class TestHibernateTemplate { private HibernateTemplate hibernateTemplate; public TestHibernateTemplate() {} public HibernateTemplate getHibernateTemplate() { return hibernateTemplate; } public void setHibernateTemplate(HibernateTemplate hibernateTemplate) { this .hibernateTemplate = hibernateTemplate; } //��试使用HibernateTemplate来操作数�?/font> public TestData getTestData( final int id) { return (TestData) hibernateTemplate.execute( new HibernateCallback() { public Object doInHibernate(Session s) throws HibernateException, SQLException { // TODO Auto-generated method stub return s.get(TestData.class, id); } }); } // 上面查询数据的方法 ��用了HibernateCallBack接口,对于�q�样��单的查询,可以使用下面由HibernateTemplate 提供的更��单的�Ҏ�� public TestData getTestData2( final int id) { return (TestData) hibernateTemplate.get(TestData.class, id); } /* 如果上面的两处方法��用Load �Ҏ��的时, 抛出延迟加蝲属性异�? Spring��理Session的问�? 应该是Spring用完Session 然后��关闭了, * 所以不可以延迟加蝲, 也就不可以��用load �Ҏ��?,????? ��Z��????*/ // 其他操作数据�Ҏ�� ? 插入,修改.... 和��用Hibernate session 差不�? HibernateTemplate只是Session的包�?/font> }

可以看到使用Hibernate模板来操作数�?是多么简�?

注意: 上面注释�?提到了在使用Load�Ҏ��时�?会有问题, Session in view 时候��用load是不会出问题�? �q�里Spring提供的方法应该是按照Hibernate的语义写的吧.

下面��是用来��试上面的类是否正常工作的测试类�?TestApp.java

package test.orm.hibernate; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import test.jdbc.DatabaseUtils; import test.orm.hibernate.model.TestData; public class TestApp { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub DatabaseUtils dataUtils = new DatabaseUtils(); dataUtils.connect(); System.out.println( "Open database:!" ); ApplicationContext context = new ClassPathXmlApplicationContext( "test/orm/hibernate/spring-hibernate.xml" ); TestHibernateTemplate hibernateTemplate = (TestHibernateTemplate) context.getBean( "testDao" ); System.out.println( "name : " ); TestData data = hibernateTemplate.getTestData( 9 ); System.out.println( "name : " + data.getName()); data = hibernateTemplate.getTestData2( 3 ); System.out.println( "name 2: " + data.getName()); dataUtils.disconnect(); } }

注意: 本测试中用到了上一��用到�?font color="#000000">DatabaseUtils.java 工具�c�L��操作Derby数据�?

�?/span> 以上实例可以看出,在Spring中��用Hibernate,效率更高一�? 你不�q�样认�ؓ�?

同时 Spring也提供了 JDO�{�其他一些数据操作框架的包装,使用上基本上是一��L��q�里��׃��在详�q�C��.

下一�ơ我们来看看Spring的I18N处理,和自定义属性编辑器的实�?

冰雨 2006-05-27 11:01 发表评论

Spring in Action �W�记(II)

冰雨 — Wed, 24 May 2006 16:04:00 GMT

摘要: Spring in Action �W�记 (II) 今天来看看��用JDBC来操作数据：使用的是Derby�Q�J... 阅读全文

冰雨 2006-05-25 00:04 发表评论

Spring in Action �W�记(I)

冰雨 — Mon, 22 May 2006 06:13:00 GMT

By : icess ,我的部落�?http://blog.matrix.org.cn/page/icess

在考试前匆匆看了一遍Spring in Action 也没有记录什�?考试�l�束�?要抓紧时间整理一�?要不然就忘了.^_^:

整理一下我目前可能会用到的模块, 对于那些现在�Ҏ��用不到的冬冬�q�是�{�有旉��再研�I�吧!

�W�一个当然是最�l�典的HelloWorld �?, 呵呵,��?但是说明了原�?

定义一个服务接�?/p>

package test.helloworld; public interface GreetingService { public void sayGreeting(); }

下面是其实现:

package test.helloworld; public class GreetingServiceImpl implements GreetingService { private String greeting; public GreetingServiceImpl() {} public GreetingServiceImpl(String greeting) { this .greeting = greeting; } public void sayGreeting() { // Auto-generated method stub System.out.println(greeting); } public void setGreeting(String greeting) { this .greeting = greeting; } }

然后��是��试 IoC 的测试代�?

package test.helloworld; import org.springframework.beans.factory.BeanFactory; import org.springframework.beans.factory.xml.XmlBeanFactory; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.springframework.core.io.FileSystemResource; public class HelloApp { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub // BeanFactory factory; // factory = new XmlBeanFactory(new FileSystemResource("src/test/helloworld/hello.xml")); // 使用不同的方法得到bean. (BeanFactory or ApplicationContext) ApplicationContext context = new ClassPathXmlApplicationContext( "test/helloworld/hello.xml" ); GreetingService greetingService = (GreetingService) context.getBean( "greetingService" ); // GreetingService greetingService = (GreetingService) factory.getBean("greetingService"); greetingService.sayGreeting(); } }

�q�有重要的配�|�文件如�?hello.xml

xml version = "1.0" encoding = "UTF-8" ?>

DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"

"http://www.springframework.org/dtd/spring-beans.dtd" >

beans >

< bean id = "greetingService"

class = "test.helloworld.GreetingServiceImpl" >

< property name = "greeting" >

< value > ice rain ! value >

property >

bean >

beans >

呵呵��p��么简�?实现�?greeting 属性的 Ioc.

�q�是Spring 两大基本支柱其一的工作原�? 关于AoP的内�?在这里不作讨�?因�ؓ现在我��用AoP的地方不是很�?��单的应用是很��单的�?^_^.

下面一��我们来看看在spring包装下的jdbc讉K��. 详细情况也可�?b>参考这�?/a>

冰雨 2006-05-22 14:13 发表评论