通过Setters方式对日期属性及日期格式进行IOC注入

通过Setters方式对日期属性及日期格式进行IOC注入

Spring不直接支持对Date类型的IOC依赖关系的注入,而提供了类似于Struts中的converte一样的属性编辑器，需要程序员自己写相应的类,并将其注册。
本实例中还涉及到Spring中采用多个配置文件,也涉及到对日期格式的注入-------更加灵活
Date属性类： DatePropertyInjection.java


package com.zhmg.spring; 
import java.util.Date; 
public class DatePropertyInjection { 
private Date date; 
public Date getDate() { 
return date; 
} 
public void setDate(Date date) { 
this.date = date; 
} 
}

属性编辑器类：PropertyEditor.java


package com.zhmg.spring; 
import java.beans.PropertyEditorSupport; 
import java.text.ParseException; 
import java.text.SimpleDateFormat; 
import java.util.Date; 
/** 
* 自定义属性编辑器处理java.util.Date类型的属性 
* @author Administrator 
* 
*/ 
public class PropertyEditor extends PropertyEditorSupport { 
String format = "yyyy-MM-dd"; 
public void setFormat(String format) { 
this.format = format; 
} 
@Override 
public void setAsText(String arg0) throws IllegalArgumentException { 
SimpleDateFormat dateFormat = new SimpleDateFormat(format); 
try { 
Date date = dateFormat.parse(arg0); 
this.setValue(date); 
} catch (ParseException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
} 
} 
}

applicationContextBeans.xml


<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:aop="http://www.springframework.org/schema/aop" 
xmlns:tx="http://www.springframework.org/schema/tx" 
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd 
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd 
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd"> 
<bean id="dateProperty" class="com.zhmg.spring.DatePropertyInjection"> 
<property name="date"> 
<value>2009-8-28</value> 
</property> 
</bean> 
</beans>

applicationContextBeans.xml


<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:aop="http://www.springframework.org/schema/aop" 
xmlns:tx="http://www.springframework.org/schema/tx" 
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd 
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd 
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd"> 
<!-- 
<bean id="dateProperty" class="com.zhmg.spring.DatePropertyInjection"> 
<property name="date"> 
<value>2009-8-28</value> 
</property> 
</bean> 
--> 
<bean id="editor" class="org.springframework.beans.factory.config.CustomEditorConfigurer"> 
<property name="customEditors"> 
<map> 
<entry key="java.util.Date"> 
<bean class="com.zhmg.spring.PropertyEditor"> 
<!—对日期格式注入--> 
<property name="format" value="yyyy-MM-dd"/> 
</bean> 
</entry> 
</map> 
</property> 
</bean> 
</beans>

测试单元：InjectionTest.java


package com.zhmg.spring; 
import junit.framework.TestCase; 
import org.springframework.beans.factory.BeanFactory; 
import org.springframework.context.support.ClassPathXmlApplicationContext; 
public class InjectionTest extends TestCase { 
BeanFactory factory; 
protected void setUp() throws Exception { 
//采用通配符的方式读取所有以applicationContext开头的配置文件 
factory = new ClassPathXmlApplicationContext("applicationContext*.xml"); 
} 
public void testInjection(){ 
DatePropertyInjection dateProp = (DatePropertyInjection)factory.getBean("dateProperty"); 
System.out.println("date=" + dateProp.getDate()); 
} 
}

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