springboot/spring使用ConfigurationProperties注解读取自定义属性（尚硅谷）

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.6.RELEASE</version>
        <relativePath/>
    </parent>
    <groupId>com.atguigu</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>上硅谷spring boot学习</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <scope>provided</scope>
            <version>1.18.12</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.junit.platform</groupId>
            <artifactId>junit-platform-launcher</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <!--将应用打包成一个可执行的jar包，生成后放到target目录-->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <!--
                -DskipTests，不执行测试用例，但编译测试用例类生成相应的class文件至target/test-classes下。

                -Dmaven.test.skip=true，不执行测试用例，也不编译测试用例类。
            -->
            <plugin>
                <groupId>org.apache.maven.plugin</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.1</version>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.5</version>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

DemoApplicationTests.java

package com.atguigu;

import com.atguigu.bean.Person;
import lombok.extern.slf4j.Slf4j;
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
@Slf4j
class DemoApplicationTests {


    @Autowired
    Person person;

    @Test
    void customProperties()
    {
        log.info("{}",person);
    }
}

application.yml（lastName等价于last-name)

debug: true
server:
 port: 8080
person:
 lastName: zhangsan
 age: 18
 boss: false
 birth: 2017/12/12
 maps: {k1: v1,k2: 'zhangsan \nlisi',k3: "zhangsan \nlisi"}
 lists:
   - lisi
   - zhaoliu
 dog:
  name: happy
  age: 5

等价的application.properties

debug=true
person.lastName=zhangsan
person.age=18
person.boss=false
person.birth=2017/12/12
person.maps.k1=v1
person.maps.k2='zhangsan \nlisi'
person.maps.k3="zhangsan \nlisi"
person.lists=[lisi, zhaoliu]
person.dog.name=happy
person.dog.age=5
server.port=8080

DemoApplication.java

package com.atguigu;

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

@SpringBootApplication
public class DemoApplication {

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

Dog.java

package com.atguigu.bean;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Dog {
    private String name;
    private Integer age;
}

Person.java

package com.atguigu.bean;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.Date;
import java.util.List;
import java.util.Map;

@Data
@AllArgsConstructor
@NoArgsConstructor
@Component
@ConfigurationProperties(prefix = "person")
public class Person {
    private String lastName;
    private Integer age;
    private Boolean boss;
    private Date birth;

    private Map<String,Object> maps;
    private List<Object> lists;
    private Dog dog;
}

Dog.java

package com.atguigu.bean;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class Dog {
    private String name;
    private Integer age;
}

输出结果：

2020-04-04 20:31:27.858  INFO 1736 --- [           main] com.atguigu.DemoApplicationTests         : Person(lastName=zhangsan, age=18, boss=false, birth=Tue Dec 12 00:00:00 CST 2017, maps={k1=v1, k2=zhangsan \nlisi, k3=zhangsan 
lisi}, lists=[lisi, zhaoliu], dog=Dog(name=happy, age=5))

""双引号不会转义特殊字符， name:"zhangsan \n lisi" zhangsan 换行 lisi
'' 单引号转义特殊字符 name : 'zhangsan \n lisi' 显示 'zhangsan \n lisi'

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