Spring自动类型转换 博客分类： Spring基础 spring类型转换

（1）要转换的是下列类中的date属性。

package convert;

import java.util.Date;

public class Student {
	private Date birthday;

	public Date getBirthday() {
		return birthday;
	}

	public void setBirthday(Date birthday) {
		this.birthday = birthday;
	}
	

}

 

 

（2）、写转换的方法，继承PropertyEditorSupport类，覆写setAsText()方法。

package util;

import java.beans.PropertyEditorSupport;
import java.text.SimpleDateFormat;
import java.util.Date;



public class DateConvert extends PropertyEditorSupport{

	private String format;

	@Override
	public void setAsText(String text) throws IllegalArgumentException {
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		try{
			Date date = sdf.parse(text);
			this.setValue(date);
		}catch(Exception ex){
			ex.printStackTrace();
		}
	}

	public void setFormat(String format){
		this.format = format;
	}
}

 

 

3、在Spring的配置文件中，将上面的转换器注册成bean。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:p="http://www.springframework.org/schema/p"
	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-3.0.xsd">
	
	<bean id="Student" class="convert.Student" >
		<property name="birthday" value="2010-1-1"></property>
	</bean>
	
<bean id="customEditorConfigurer" class="org.springframework.beans.factory.config.CustomEditorConfigurer">
  <property name="customEditors">
   <map>
    <entry key="java.util.Date">
     <bean class="util.DateConvert">
      <property name="format" value="yyyy-MM-dd"></property>
     </bean>
    </entry>
   </map>
  </property>
 </bean>

	
</beans>

 

 

（4）测试类。

package test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import convert.Student;
import junit.framework.TestCase;

public class StudentTest extends TestCase{
	public void testStudent(){
		ApplicationContext ctx = new ClassPathXmlApplicationContext(
				"convert.xml");
		Student stu = (Student)ctx.getBean("Student");
		
		System.out.print(stu.getBirthday());
	}

}

 

 

关于这个内容可以参考这个跟详细的博客：spring--类型转换器