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>