(一)新建一个java beanpackage chb.demo.vo;public class HelloBean ...{private String helloWorld;public String getHelloWorld() ...{return helloWorld;}public void setHelloWorld(String helloWorld) ...{this.helloWorld = helloWorld;}}(二)构造一个配置文件
<?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="helloBean" class="chb.demo.vo.HelloBean"><property name="helloWorld"><value>Hello!chb!</value></property></bean></beans>
(三)读取xml文件
1.利用ClassPathXmlApplicationContextApplicationContext context = new ClassPathXmlApplicationContext("beanConfig.xml");HelloBean helloBean = (HelloBean)context.getBean("helloBean");System.out.println(helloBean.getHelloWorld());2.利用FileSystemResource读取Resource rs = new FileSystemResource("D:/software/tomcat/webapps/springWebDemo/WEB-INF/classes/beanConfig.xml");BeanFactory factory = new XmlBeanFactory(rs);HelloBean helloBean = (HelloBean)factory.getBean("helloBean");System.out.println(helloBean.getHelloWorld());值得注意的是:利用FileSystemResource,则配置文件必须放在project直接目录下,或者写明绝对路径,否则就会抛出找不到文件的异常
这里介绍两种技术:利用spring读取properties 文件和利用java.util.Properties读取(一)利用spring读取properties 文件我们还利用上面的HelloBean.java文件,构造如下beanConfig.properties文件:helloBean.class=chb.demo.vo.HelloBean
helloBean.helloWorld=Hello!chb!属性文件中的"helloBean"名称即是Bean的别名设定,.class用于指定类来源。然后利用org.springframework.beans.factory.support.PropertiesBeanDefinitionReader来读取属性文件BeanDefinitionRegistry reg = new DefaultListableBeanFactory();PropertiesBeanDefinitionReader reader = new PropertiesBeanDefinitionReader(reg);reader.loadBeanDefinitions(new ClassPathResource("beanConfig.properties"));BeanFactory factory = (BeanFactory)reg;HelloBean helloBean = (HelloBean)factory.getBean("helloBean");System.out.println(helloBean.getHelloWorld());(二)利用java.util.Properties读取属性文件比如,我们构造一个ipConfig.properties来保存服务器ip地址和端口,如:ip=192.168.0.1
port=8080则,我们可以用如下程序来获得服务器配置信息:InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("ipConfig.properties");Properties p = new Properties();try ...{p.load(inputStream);} catch (IOException e1) ...{e1.printStackTrace();}System.out.println("ip:"+p.getProperty("ip")+",port:"+p.getProperty("port"));本文只介绍了一些简单操作,不当之处希望大家多多指教
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