springboot加载yml文件获不到值

时间:2022-05-28 技术界小学生人气:0

springboot加载yml文件获不到值

今天使用spring boot读取yml文件，这种多层嵌套的竟然无法读取到(value注解spring.redis.pool.max.wait)，即便加上全名也不行，然后网上搜到的内容也未曾满意，很多文章内容都是一样且重复的.最后放弃了查找，突发奇想之下解决了这个问题.

本文旨在如何读取多层嵌套的yml文件，希望能帮到众位.

以下是代码：

package com.boot.config;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
@Configuration
@ConfigurationProperties(prefix = "spring.redis;pool.max;pool.min")
@PropertySource(value = "classpath:redis.yml")
public class RedisConfiguration implements ApplicationListener<ApplicationEvent> {
	@Value("${host}")
	private String host;
	@Value("${port}")
	private Long port;
	@Value("${timeout}")
	private Long timeout;
	@Value("${database}")
	private Long database;
	
	@Value("${wait}")
	private Long poolMaxWait;
	@Value("${idle}")
	private Long poolMaxIdle;
	@Value("${idle}")
	private Long poolMinIdle;
	@Value("${active}")
	private Long poolMaxActive;
	public void onApplicationEvent(ApplicationEvent event) {
        // 打印属性
		System.out.println("============= redisConnect ================");
		System.out.println(this.toString());
    }
	@Override
    public String toString() {
	    return "RedisConfiguration [host=" + host + ", port=" + port + ", timeout=" + timeout
	            + ", database=" + database + ", poolMaxWait=" + poolMaxWait + ", poolMaxIdle="
	            + poolMaxIdle + ", poolMinIdle=" + poolMinIdle + ", poolMaxActive=" + poolMaxActive
	            + "]";
    }
}

#多层配置
spring:
	redis:
		database: 0
		host: localhost
		port: 6379
		timeout: 0
		pool:
		   max:
			  active: 8
			  wait: -1
			  idle: 8
		   min:
			  idle: 0

日志打印如下所示：

============= redisConnect ================
RedisConfiguration [host=localhost, port=6379, timeout=0, database=0, poolMaxWait=-1, poolMaxIdle=0, poolMinIdle=0, poolMaxActive=8]

获取不到yml配置文件指定的值

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication 
public class App {
     public static void main(String[] args) {
        SpringApplication app = new SpringApplication(App.class);
        ConfigurableApplicationContext context = app.run(args);
        System.out.println(context.getEnvironment().getProperty("jdbc.pwd"));  
        context.close();
   }
}

apllication.yml 放置在classpath路径下

jdbc:
 pwd: 123456  #冒号和数字之间有一个空格，没有否则获取失败，pwd前面有缩进两个字符

ps：版本spring-4.3.2-release,springboot-1.4

以上为个人经验，希望能给大家一个参考，也希望大家多多支持。

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