bean类
import java.util.Date; public class Bean { private Date date; public Date getDate() { return date; } public void setDate(Date date) { this.date = date; } }
配置xml
<bean id="bean" class="com.spring.bean.Bean"> <property name="date" value="2009-11-21"/> </bean>
spring不能将string转换成date类型，没有匹配的编辑器或者转换机制。如果想实现string转换成Date，有两种解决办法。
使用自定义属性编辑器
import java.beans.PropertyEditorSupport; import java.text.SimpleDateFormat; import java.util.Date; public class DatePropertyEditor extends PropertyEditorSupport {
String format; @Override public void setAsText(String text) throws IllegalArgumentException { try { SimpleDateFormat sdf=new SimpleDateFormat(format);
Date date=sdf.parse(text); this.setValue(date); //把转换后的值传过去 } catch (Exception e) { e.printStackTrace(); } } }
写完编辑器后还需要把编辑器注入到spring中。
<bean id="customEditorConfigurer" class="org.springframework.beans.factory.config.CustomEditorConfigurer"> <!-- 把值注入到CustomEditorConfigurer的 Map类型的customEditors属性--> <property name="customEditors"> <map> <entry key="java.util.Date"> <!-- 内部bean只供自己使用 --> <bean class="com.spring.util.DatePropertyEditor">
<property name="format" value="yyyy/MM/dd"></property>
</bean> </entry> </map> </property> </bean>
或者
@InitBinder public void initBinder(WebDataBinder binder) { binder.registerCustomEditor(Date.class, "date", new DatePropertyEditor());
}
注册Spring自带的属性编辑器CustomDateEditor
public class DatePropertyEditorRegistrar implements PropertyEditorRegistrar{ public void registerCustomEditors(PropertyEditorRegistry registry) { registry.registerCustomEditor(Date.class, new CustomDateEditor(new SimpleDateFormat("yyyy-MM-dd"),true)); } }
通过在配置文件中将自定义的DatePropertyEditorRegistrar注册进入org.Springframework.beans.factory.config.CustomEditorConfigurer的propertyEditorRegistrars属性中
<bean class="org.springframework.beans.factory.config.CustomEditorConfigurer"> <property name="propertyEditorRegistrars"> <list> <ref bean="datePropertyEditorRegistrar"/> </list> </property> </bean>
