spring入门实例-factory bean-优快云博客

本文通过一个具体的示例介绍了如何在Spring中使用FactoryBean来创建并初始化Bean。示例展示了配置文件的定义方式以及如何通过Java代码进行Bean的获取与使用。

spring入门实例初始化bean

实例factory bean

配置文件

<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-2.5.xsd">
	<!--  
	<bean name="xmlData" class="com.myspring.DataBaseXMLOutput" factory-method="createInstance"/>
	-->
	<bean name="xmlbeanfactory" class="com.myspring.DataBaseXMLOutput"/>
	<bean name="xmlbean" class="com.myspring.DatabaseXMLBean" factory-bean="xmlbeanfactory" factory-method="createInstance"/>
	
</beans>

bean和测试main：

public class DataBaseXMLOutput
{
	private String root = "";
	public String getRoot()
	{
		return root;
	}

	public void setRoot(String root)
	{
		this.root = root;
	}

	public String getChild()
	{
		return child;
	}

	public void setChild(String child)
	{
		this.child = child;
	}

	private String child = "";
	public static void main(String[] args)
	{
		ApplicationContext context = new ClassPathXmlApplicationContext("com/myspring/databasexmloutput.xml");
		DataBaseXMLOutput output = (DataBaseXMLOutput) context.getBean("xmlData");
		System.out.println(output.getChild());
	
	public static DatabaseXMLBean createInstance()
	{
		DatabaseXMLBean bean = new DatabaseXMLBean();
		bean.setName("emp");
		bean.setLength(10);
		return bean;
	}
	
	

}

可是会报：factory bean 'xmlbeanfactory'; factory method 'createInstance()'. Check that a method with the specified name exists and that it is non-static.