读取application.properties参数注入到Bean属性

<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>www.tszr</groupId>
    <artifactId>chapter021</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.3.RELEASE</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>11</source>
                    <target>11</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

package com.itheima.domain;

public class Pet {
    private String type;
    private String name;

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String toString() {
        return "Pet{" +
                "type='" + type + '\'' +
                ", name='" + name + '\'' +
                '}';
    }
}

package com.itheima.domain;

import java.util.Arrays;
import java.util.List;
import java.util.Map;

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

@Component
@ConfigurationProperties(prefix = "person")
public class Person {
    private int id; // id
    private String name; // 名称
    private List<String> hobby; // 爱好
    private String[] family; // 家庭成员
    private Map<String, String> map;
    private Pet pet; // 宠物


    public int getId() {
        return id;
    }


    public void setId(int id) {
        this.id = id;
    }


    public String getName() {
        return name;
    }


    public void setName(String name) {
        this.name = name;
    }


    public List<String> getHobby() {
        return hobby;
    }


    public void setHobby(List<String> hobby) {
        this.hobby = hobby;
    }


    public String[] getFamily() {
        return family;
    }


    public void setFamily(String[] family) {
        this.family = family;
    }


    public Map<String, String> getMap() {
        return map;
    }


    public void setMap(Map<String, String> map) {
        this.map = map;
    }


    public Pet getPet() {
        return pet;
    }


    public void setPet(Pet pet) {
        this.pet = pet;
    }


    @Override
    public String toString() {
        return "Person{" + "id=" + id + ", name='" + name + '\'' + ", hobby=" + hobby + ", family="
                + Arrays.toString(family) + ", map=" + map + ", pet=" + pet + '}';
    }
}

person.id=1
person.name=tom
person.hobby=play,read,sleep
person.family=father,mother
person.map.k1=v1
person.map.k2=v2
person.pet.type=dog
person.pet.name=kity

package com.itheima;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

package com.itheima;

import org.junit.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;

import com.itheima.domain.Person;

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class ApplicationTest {
    @Autowired
    private Person person;

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