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(一)新建一个java bean package 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ClassPathXmlApplicationContext ApplicationContext 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
(二)构造一个配置文件
(三)读取xml文件
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"));
helloBean.class=chb.demo.vo.HelloBean helloBean.helloWorld=Hello!chb!
ip=192.168.0.1 port=8080
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