Spring的自定义属性编辑器

什么是属性编辑器：自定义属性编辑器就是将Spring的字符串转换成相对应的对象进行注入，Spring已经有了内置的属性编辑器，我们可以自己定义属性编辑器。

如何定义属性编辑器：

(1)继承PropertyEditorSupport，重写setAsText()方法。

package com.bjsxt.spring;   import java.beans.PropertyEditorSupport; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date;   /**  * java.util.Date属性编辑器  * @author Administrator  *  */ public class UtilDatePropertyEditor extends PropertyEditorSupport {          private String format="yyyy-MM-dd";               @Override        public void setAsText(String text) throws IllegalArgumentException {               System.out.println("UtilDatePropertyEditor.saveAsText() -- text=" + text);                             SimpleDateFormat sdf = new SimpleDateFormat(format);               try {                      Date d = sdf.parse(text);                      this.setValue(d);               } catch (ParseException e) {                      e.printStackTrace();               }        }          public void setFormat(String format) {               this.format = format;        }   }

(2)将属性编辑器注册到Spring中。

<bean id="customEditorConfigurer" class="org.springframework.beans.factory.config.CustomEditorConfigurer">               <property name="customEditors">                      <map>                             <entry key="java.util.Date">                                    <bean class="com.bjsxt.spring.UtilDatePropertyEditor">                                           <property name="format" value="yyyy-MM-dd"/>                                    </bean>                             </entry>                      </map>               </property>        </bean>