springboot修改配置文件的value

布满荆棘的人生 2023-10-11 19:32 27阅读 0赞

/*
     * Copyright (c) Honor Device Co., Ltd. 2022-2022. All rights reserved.
     */
    
    package com.hihonor.it.pur.supinfo.interfaces.facade.controller;
    
    import java.util.HashMap;
    import java.util.Map;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.env.EnvironmentPostProcessor;
    import org.springframework.core.env.ConfigurableEnvironment;
    import org.springframework.core.env.MapPropertySource;
    import org.springframework.core.env.MutablePropertySources;
    import org.springframework.core.env.PropertySource;
    import org.springframework.stereotype.Component;
    
    @Component
    public class DecodeEnvironmentPostProcessor implements EnvironmentPostProcessor {
        @Override
        public void postProcessEnvironment(ConfigurableEnvironment environment, SpringApplication application) {
            String env = environment.getProperty("spring.profiles.active");
            MutablePropertySources sources = environment.getPropertySources();
            PropertySource<?> applicationProperty = sources.get("applicationConfig: [classpath:/application.properties]");
            Object source = applicationProperty.getSource();
            System.out.println(source);
            Map map = new HashMap<>();
            map.put("datasource.password.1", "fewgewgew");
            MapPropertySource newSource = new MapPropertySource("application-decode", map);
            environment.getPropertySources().addBefore(applicationProperty.getName(), newSource);
            System.out.println(newSource);
            System.out.println("pwd: " + environment.getProperty("datasource.password.1"));
        }
    }

在class目录下必须要有约定的文件配置META-INF/spring.factories

org.springframework.boot.env.EnvironmentPostProcessor=com.test.it.interfaces.facade.controller.DecodeEnvironmentPostProcessor