一，一個類多個屬性的情況

1. application.properties配置文件寫法

my.config.ip=127.0.0.1
my.config.port=8080

2. 自定義配置類：MyTestConfig

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;@Configuration
@ConfigurationProperties(prefix = "my.config", ignoreUnknownFields = false)
public class MyTestConfig {public static final Logger log = LoggerFactory.getLogger(MyTestConfig.class);private String ip;private int port;public String getIp() {return ip;}public int getPort() {return port;}public void setIp(String ip) {this.ip = ip;log.info("【配置管理】配置ip：" + ip);}public void setPort(int port) {this.port = port;log.info("【配置管理】配置端口：" + port);}
}

二，一個類多個屬性，駝峰字段名

1. application.properties配置文件寫法

#線程池參數：核心線程數
my.config.threadpool.core-pool-size=5
#線程池參數：最大線程數數
my.config.threadpool.max-poll-size=5
#線程池參數：阻塞的隊列大小，-1代表沒有限制，也就是int的最大值
my.config.threadpool.queue-size=-1
#核心線程之外的空閑線程   的存活時間(單位，秒)
my.config.threadpool.keep-alive-time=0

2. 自定義配置類：MyThreadPoolConfig

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;import java.util.List;@Configuration
@ConfigurationProperties(prefix = "my.config.threadpool",ignoreUnknownFields = false
)
public class MyThreadPoolConfig {public static final Logger log = LoggerFactory.getLogger(MyThreadPoolConfig.class);private int corePoolSize = 10;// 線程池的核心線程數量private int maxPollSize = 10;//最大的線程數量private int queueSize = -1;//阻塞的隊列大小private long keepAliveTime = 0L;//線程空閑時間public void setCorePoolSize(int corePoolSize) {this.corePoolSize = corePoolSize;log.info("【配置管理】線程池的核心線程數量：" + corePoolSize + "個線程");}public void setMaxPollSize(int maxPollSize) {this.maxPollSize = maxPollSize;log.info("【配置管理】最大的線程數量：" + maxPollSize + "個線程");}public void setQueueSize(int queueSize) {this.queueSize = queueSize;log.info("【配置管理】阻塞的隊列大小：" + (queueSize > 0 ? corePoolSize + "個" : "不限制"));}public void setKeepAliveTime(long keepAliveTime) {this.keepAliveTime = keepAliveTime;log.info("【配置管理】線程空閑時間(單位，秒)：" + (keepAliveTime > 0 ? keepAliveTime + "秒" : "不限制"));}}

三，需要配置成List集合的情況

1. application.properties配置文件寫法

my.config.test.item[0]=test_1

2. 自定義配置類：MyTestConfig

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;import java.util.List;@Configuration
@ConfigurationProperties(prefix = "my.config.test",ignoreUnknownFields = false
)
public class MyTestConfig {public static final Logger log = LoggerFactory.getLogger(MyTestConfig.class);private List<String> item;public void setItem(List<String> item) {this.item = item;for (String str : item) {log.info("【配置管理】新增一個子項：" + str);}}}

四，需要配置成List<自定義類>集合的情況

1. application.properties配置文件寫法

my.config.test.item[0].name=zhangsan
my.config.test.item[0].age=25my.config.test.item[1].name=lisi
my.config.test.item[1].age=26

2. 實體類：MyPeople

   public class MyPeople {private String name;private int age;public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age= age;}}

3. 自定義配置類：MyTestConfig

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;import java.util.List;@Configuration
@ConfigurationProperties(prefix = "my.config.test",ignoreUnknownFields = false
)
public class MyTestConfig {public static final Logger log = LoggerFactory.getLogger(MyTestConfig.class);private List<MyPeople> item;public List<MyPeople> getItem() {return item;}public void setItem(List<MyPeople> item) {this.item = item;for (MyPeople people : item) {log.info("people : " + people.getName() + " " + people.getAge());}}}