Spring学习笔记 2007-10-24

Spring学习笔记 2007-10-24

Spring提供了一个BeanFactoryPostProcessor接口的实现类：CustomEditorConfigurer。这个类可以实现java.beans.PropertyEditor接口的类，并将字符串值转换为指定类型的对象。
通过一个简单的例子来说明。
导入Spring所需的包：commons-logging.jar，spring.jar 。(日志包和Spring包)
包下载地址：
http://www.ziddu.com/download/3555993/Spring.rar.html
或者http://www.blogjava.net/Files/ducklyl/Spring.rar

(1)创建User 类

package com.editor;

public class User {
 private String name;
 private int number;
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public int getNumber() {
  return number;
 }
 public void setNumber(int number) {
  this.number = number;
 }

}

(2)创建HelloBean 类

package com.editor;

public class HelloBean {
 private String helloWord;
 private User user;
 public String getHelloWord() {
  return helloWord;
 }
 public void setHelloWord(String helloWord) {
  this.helloWord = helloWord;
 }
 public User getUser() {
  return user;
 }
 public void setUser(User user) {
  this.user = user;
 }

}
(3)创建UserEditor 类

package com.editor;
import java.beans.PropertyEditorSupport;

public class UserEditor extends PropertyEditorSupport{
 public void setAsText(String text)
 {
  String[] strs=text.split(",");
  int number=Integer.parseInt(strs[1]);
  
  User user=new User();
  user.setName(strs[0]);
  user.setNumber(number);
  
  setValue(user);
 }

}

(4)在类路径下创建property-config.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="EditorConfigBean"
  class="org.springframework.beans.factory.config.CustomEditorConfigurer">
  <property name="customEditors"><!--CustomEditorConfigurer类会加载"customEditors"属性设定的map-->
   <map>
    <entry key="com.editor.User">
     <bean id="userEditor" class="com.editor.UserEditor" />
    </entry>
   </map>
  </property>
 </bean>

 <bean id="helloBean" class="com.editor.HelloBean">
  <property name="helloWord">
   <value>Hello!</value>
  </property>
  <property name="user">
   <value>ducklyl,123456</value>
  </property>
 </bean>

</beans>
(5)创建测试类

package com.editor;

import org.springframework.context.*;
import org.springframework.context.support.*;

public class SpirngTest {
 public static void main(String[] args)
 {
  //读取配置文件
  ApplicationContext context=new FileSystemXmlApplicationContext("property-config.xml");
  //获取id="helloBean"对象
  HelloBean hello=(HelloBean)context.getBean("helloBean");
  //调用helloBean对象getHelloWord()方法
  System.out.println(hello.getHelloWord());
  System.out.println("Name:"+hello.getUser().getName());
  System.out.println("Number:"+hello.getUser().getNumber());
 }

}
如果以上正确设置，运行结果为：
Hello!
Name:ducklyl
Number:123456