一、系统启动后注入配置
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package com.example.config;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.PropertySource;import org.springframework.core.env.Environment;/** * @author: GrandKai * @create: 2016-09-01 11:24 */@Configuration@PropertySource(ignoreResourceNotFound = true, value = {"classpath:/config/email.properties","classpath:/config/email.yml"}, name = "email")public class Config {} |
需要在ApplicationContext中注册配置
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AnnotationConfigEmbeddedWebApplicationContext context = (AnnotationConfigEmbeddedWebApplicationContext) app.run("参数1");context.register(Config.class); |
用以下方式取值
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Environment env = context.getEnvironment();System.out.println(env.getProperty("address")); |
email.yml文件配置如下：
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server: address: 127.0.0.1 |
二、在命令行传入注入到程序中
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public class Main { public static void main(String... args) { //initialize the command line parsing stuff OptionParser parser = new OptionParser(); parser.accepts("greeting").withRequiredArg(); OptionSet options = parser.parse(args); //create the actual Spring PropertySource PropertySource<?> ps = new JOptCommandLinePropertySource(options); //setup the Spring context AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(); ctx.getEnvironment().getPropertySources().addLast(ps); //register the property source with the environment ctx.register(Greeter.class); ctx.refresh(); Greeter greeter = ctx.getBean(Greeter.class); greeter.sayGreeting(); }}@Componentclass Greeter { @Inject private Environment env; //the following would also work //@Value("${greeting}") //private String greeting; /** * Print out the 'greeting' property if it exists, and otherwise, "Welcome!". */ public void sayGreeting() { System.out.println(env.getProperty("greeting", "Welcome!")); }}public static void main(String [] args) { SimpleCommandLinePropertySource ps = new SimpleCommandLinePropertySource(args); @SuppressWarnings("resource") AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext(); ctx.getEnvironment().getPropertySources().addFirst(ps); ctx.register(ApplicationConfig.class); ctx.refresh();}@Configuration@EnableScheduling@ComponentScan("com.mycompany.package")@PropertySource( value = {"classpath:/application.properties", "file:${config.location}"}, ignoreResourceNotFound = true )class ApplicationConfig { @Bean public static PropertySourcesPlaceholderConfigurer propertyConfigurer() { return new PropertySourcesPlaceholderConfigurer(); }}@Componentclass MyComponent { @Value("${my.property.data}") private String myPropertyData; @Scheduled(fixedDelayString = "${schedule.delay.period}") public void run() { : }} |
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原文链接：http://www.jianshu.com/p/eadfecea1f2d
