9.自定义属性编辑器PropertyEditor（主要针对的是自定义的类，不常用，还是用ref注入的多见）

作用：Spring中我们可以使用属性编辑器来`将特定的字符串转换为对象`
通过set注入时，想简单的这种是spring提供好了属性编辑器,将value="20"中的字符串转换成了int类型的20
	<property name="age" value="20"></property>
但是像下面的这种，value="甘肃兰州"，spring是没办法自动将字符串转为Address类型，所以需要我们
自己手动的去写属性编辑器
	<property name="address" value="甘肃兰州"></property>
java.beans.PropertyEditor(JDK中的接口)用于将xml文件中字符串转换为特定的类型,同时JDK为我
们提供一个实现类java.beans.PropertyEditorSupport

Student.java

public class Student {
	private long id;
	private String name;
	private boolean gender;
	private int age;
	private Address address;//要引入Address类型
	
	public Address getAddress() {
		return address;
	}
	public void setAddress(Address address) {
		this.address = address;
	}
	public long getId() {
		return id;
	}
	public void setId(long id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public boolean isGender() {
		return gender;
	}
	public void setGender(boolean gender) {
		this.gender = gender;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	
	public String toString(){
		return "id="+id+" name="+name+" gender="+gender+" age="+age+
		" address:"+address;
	}
}

Address.java

public class Address {
	private String city;
	private String street;
	private String country;
	
	public Address(){
		
	}
	public Address(String city, String street, String country) {
		this.city = city;
		this.street = street;
		this.country = country;
	}
	public String getCity() {
		return city;
	}
	public void setCity(String city) {
		this.city = city;
	}
	public String getStreet() {
		return street;
	}
	public void setStreet(String street) {
		this.street = street;
	}
	public String getCountry() {
		return country;
	}
	public void setCountry(String country) {
		this.country = country;
	}
	
	public String toString(){
		return "city="+city+" street="+street+" country="+country;
	}
}

PropertyEditorSupport.java
一定要继承PropertyEditorSupport类，重写里面的setAsText()方法

import java.beans.PropertyEditorSupport;
//一定要继承PropertyEditorSupport类，重写里面的方法
public class AddressEditor extends PropertyEditorSupport {
	@Override
	public void setAsText(String text) throws IllegalArgumentException {
		//"江苏,昆山,浦东软件园"
		String[] str = text.split(","); //按照自己的规则是什么符号分割xml里面传过来的value值
		String city = str[0];
		String street = str[1];
		String country = str[2];
		Address add = new Address(city, street, country);
		//把新的值设置到对象中
		setValue(add);//setValue我们不需要管，直接调用
	}
}

proEdit.xml
之前是这样的,通过ref注入，
现在是将" 识别成一个Address

<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
	http://www.springframework.org/schema/beans/spring-beans-3.2.xsd">
	<bean name="student" class="com.briup.ioc.proEdit.Student">
		<property name="id" value="1">property>
		<property name="name" value="tom">property>
		<property name="gender" value="true">property>
		<property name="age" value="20">property>
		<property name="address" value="江苏,昆山,浦东软件园" >property>
	bean>
beans>

测试类：

@Test
//知识点: 使用自定义属性编辑器
public void ioc_proEdit() {
	try {
		String[] path = {"com/briup/ioc/proEdit/proEdit.xml"};
		ApplicationContext container = new ClassPathXmlApplicationContext(path);
		Student stu=(Student) container.getBean("student");	
		System.out.println(stu.getAddress());
	} catch (Exception e) {
		e.printStackTrace();
	}
}

结果：可以通过Student拿到Address对象