关于服务器上部署war后怎么配置读取外部的yml文件

第一步打成war包
1.pom.xml 修改为

<packaging>war</packaging>

2.然后就是依赖

<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-tomcat</artifactId>
   <scope>provided</scope>
</dependency>

3.继承启动类

import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;

public class ServletInitializer extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        //Application的类名
        return application.sources(DataCenterApplication.class);
    }

}

4.在项目的config下建类 MyEnvironmentPostProcessor类实现

import org.springframework.boot.SpringApplication;
import org.springframework.boot.env.EnvironmentPostProcessor;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.MutablePropertySources;
import org.springframework.core.env.PropertiesPropertySource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.support.PropertiesLoaderUtils;

import java.io.File;
import java.io.IOException;
import java.util.Properties;
public class MyEnvironmentPostProcessor implements EnvironmentPostProcessor {
    @Override
    public void postProcessEnvironment(ConfigurableEnvironment configurableEnvironment, SpringApplication application) {
        //tomcat路径
        String property = System.getProperty("catalina.home");
        System.out.println("catalinahome:"+property);

        String path =property+ File.separator+"conf"+File.separator+"application.properties";
        File file = new File(path);
        System.out.println("Loading local settings from : "+path);

        if (file.exists()) {
            MutablePropertySources propertySources = configurableEnvironment.getPropertySources();
            Properties properties = loadProperties(file);
            System.out.println(properties.toString());
            propertySources.addFirst(new PropertiesPropertySource("Config", properties));
        }
    }

    private Properties loadProperties(File f) {
        FileSystemResource resource = new FileSystemResource(f);
        try {
            return PropertiesLoaderUtils.loadProperties(resource);
        } catch (IOException ex) {
            throw new IllegalStateException("Failed to load local settings from " + f.getAbsolutePath(), ex);
        }
    }
}

4.1 如果你的文件是yml

package com.fyking.etown.config;

import org.springframework.beans.factory.config.YamlPropertiesFactoryBean;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.env.EnvironmentPostProcessor;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.env.MutablePropertySources;
import org.springframework.core.env.PropertiesPropertySource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.support.PropertiesLoaderUtils;

import java.io.File;
import java.io.IOException;
import java.util.Properties;

public class MyEnvironmentPostProcessor implements EnvironmentPostProcessor {

    @Override
    public void postProcessEnvironment(ConfigurableEnvironment configurableEnvironment, SpringApplication application) {
        //tomcat路径
        String property = System.getProperty("catalina.home");
//        property = "D:\\opt\\module\\tomcat8\\apache-tomcat-8.5.89";
        System.out.println("catalinahome:" + property);

        String path = property + File.separator + "conf" + File.separator + "application-druid.yml";
        File file = new File(path);
        System.out.println("Loading local settings from : " + path);

        if (file.exists()) {
//            MutablePropertySources propertySources = configurableEnvironment.getPropertySources();
            YamlPropertiesFactoryBean yaml = new YamlPropertiesFactoryBean();
            yaml.setResources(new FileSystemResource(path));
//            Properties properties = loadProperties(file);
            System.out.println(yaml.toString());

            MutablePropertySources propertySources = configurableEnvironment.getPropertySources();
            propertySources.addFirst(new PropertiesPropertySource("Config", yaml.getObject()));

        }
    }

    private Properties loadProperties(File f) {
        FileSystemResource resource = new FileSystemResource(f);
        try {
            return PropertiesLoaderUtils.loadProperties(resource);
        } catch (IOException ex) {
            throw new IllegalStateException("Failed to load local settings from " + f.getAbsolutePath(), ex);
        }
    }
}

5.在classpath定义一个META-INF文件夹然后在其下面先建spring.factories文件，在其中指定

org.springframework.boot.env.EnvironmentPostProcessor=com.xxx.config.MyEnvironmentPostProcessor