spring boot启动时加载外部配置文件的方法

前言

相信很多人选择spring boot主要是考虑到它既能兼顾spring的强大功能，还能实现快速开发的便捷。本文主要给大家介绍了关于spring boot启动时加载外部配置文件的相关内容，下面话不多说了，来随着小编一起学习学习吧。

业务需求:

加载外部配置文件，部署时更改比较方便。

先上代码：

@springbootapplication
public class application {

 public static void main(string[] args) throws exception {
  springapplicationbuilder springapplicationbuilder = new springapplicationbuilder(application.class);
  springapplicationbuilder.web(true);
  properties properties = getproperties();
  standardenvironment environment = new standardenvironment();
  environment.getpropertysources().addlast(new propertiespropertysource("micro-service", properties));
  springapplicationbuilder.environment(environment);
  springapplicationbuilder.run(args);
 }

 private static properties getproperties() throws ioexception {
  propertiesfactorybean propertiesfactorybean = new propertiesfactorybean();
  resourcepatternresolver resolver = new pathmatchingresourcepatternresolver();
  propertiesfactorybean.setignoreresourcenotfound(true);
  resource filesystemresource = resolver.getresource("file:/opt/company/test.properties");
  propertiesfactorybean.setlocations(filesystemresource);
  propertiesfactorybean.afterpropertiesset();
  return propertiesfactorybean.getobject();
 }
}

使用变量的工具类

@component
public class environmentutil {
 private static environment environment;
 @autowired
 public void setenvironment(environment environment) {
  environmentutil.environment = environment;
 }

 public static <t> t getproperty(string key, class<t> targettype, t defaultvalue) {
  return environment.getproperty(key, targettype, defaultvalue);
 }

 public static <t> t getproperty(string key, class<t> targettype) {
  return environment.getproperty(key, targettype);
 }

 public static string getproperty(string key) {
  return environment.getproperty(key);
 }

 public static string getproperty(string key, string defaultvalue) {
  return environment.getproperty(key, defaultvalue);
 }

 public static integer getinteger(string key, integer defaultvalue) {
  return environment.getproperty(key, integer.class, defaultvalue);
 }
}

也可以通过@value("${key}")使用

这中加载方法优先级很高，如果与spring boot配置文件同名，将覆盖application.properties文件中的配置。

总结

以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对的支持。