微人事第二天：使用yml方式进行属性注入

之前说了使用properties的方式进行属性注入，这次看看yml是否能完成同样的功能

yml和properties的区别：
1.yml是有序的，properties是无序的
2.自定义的yml，目前暂时不支持使用注解直接注入到Spring Boot项目中

1.首先配置实体类RedisCluster

package org.javaboy.yaml;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.List;

@Component
@ConfigurationProperties("redis")
public class RedisCluster {
    private Integer port;
    private List hosts;
    private List redisList;


    public Integer getPort() {
        return port;
    }

    public void setPort(Integer port) {
        this.port = port;
    }

    public List getHosts() {
        return hosts;
    }

    public void setHosts(List hosts) {
        this.hosts = hosts;
    }

    public List getRedisList() {
        return redisList;
    }

    public void setRedisList(List redisList) {
        this.redisList = redisList;
    }

    @Override
    public String toString() {
        return "RedisCluster{" +
                "port=" + port +
                ", hosts=" + hosts +
                ", redisList=" + redisList +
                '}';
    }
}

@Component：将这个实体类加入到spring容器
@ConfigurationProperties(“redis”) ：将yml中的数据加载进来
2.Redis

package org.javaboy.yaml;


public class Redis {
    private Integer port;
    private String host;

    public Integer getPort() {
        return port;
    }

    public void setPort(Integer port) {
        this.port = port;
    }

    public String getHost() {
        return host;
    }

    public void setHost(String host) {
        this.host = host;
    }

    @Override
    public String toString() {
        return "Redis{" +
                "port=" + port +
                ", host='" + host + '\'' +
                '}';
    }
}

3.application.yml

server:
  port: 8081
  servlet:
    context-path: /javaboy
redis:
  port: 6379
  hosts:
    - 192.168.66.128
    - 192.168.66.129
    - 192.168.66.130
    - 192.168.66.131
  redisList:
    - port: 6379
      host: 192.168.66.66
    - port: 6380
      host: 192.168.66.67

这里写数组数据时前面加-
注意：这里的名称：后要空格，否则会报错

4.编写测试类

package org.javaboy.yaml;

import org.junit.jupiter.api.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
class YamlApplicationTests {

    @Autowired
    private RedisCluster redisCluster;

    @Test
    void contextLoads() {
        System.out.println(redisCluster);
    }

}

点击运行：

RedisCluster{port=6379, hosts=[192.168.66.128, 192.168.66.129, 192.168.66.130, 192.168.66.131], redisList=[Redis{port=6379, host=‘192.168.66.66’}, Redis{port=6380, host=‘192.168.66.67’}]}