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原文地址:http://hbcui1984.iteye.com/blog/56496
(一)新建一个java bean(HelloBean.java)java 代码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(beanConfig.xml)
xml 代码<!---->xml version="1.0" encoding="UTF-8"?> <!---->> <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ClassPathXmlApplicationContextjava 代码ApplicationContext context = new ClassPathXmlApplicationContext("beanConfig.xml"); HelloBean helloBean = (HelloBean)context.getBean("helloBean"); System.out.println(helloBean.getHelloWorld());
2.利用FileSystemResource读取java 代码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:properties 代码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java 代码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:properties 代码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:java 代码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"));
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原文地址:http://www.cnblogs.com/zhaideyou/p/5875789.html