4-2 SpringBoot properties 配置 置入JavaBean中

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4-1说了yml文件置入JavaBean，properties文件也是一样的。

配置都一样，就是properties是这样写：

#private String lastName;
#private Integer age;
#private Boolean boss;
#private Date birth;
#private Map<String,Object> maps;
#private List<Object> lists;
#private Dog dog;

#=============================================================

#person.lastName 相当于 person.last-name
person.last-name=BiHu
person.age=18
person.boss=false
person.birth=2025/10/10
person.maps.k1=value1
person.maps.k2=value2
person.lists=v1,v2,v3,v4
person.dog.name=小勾勾
person.dog.age=2

然后其他都一样的 即：

package com.bihu.Bean;

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

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

//无论是properties 还是 yml 文件绑定映射 JavaBean 都是下面两个注解原理而且要导入对应gav，原理也说明白了
@Component
@ConfigurationProperties(prefix = "person")
public class JavaBean {

        private String lastName;
        private Integer age;
        private Boolean boss;
        private Date birth;
        private Map<String,Object> maps;
        private List<Object> lists;
        private Dog dog;

        @Override
        public String toString() {
            return "Person{" +
                    "lastName='" + lastName + '\'' +
                    ", age=" + age +
                    ", boss=" + boss +
                    ", birth=" + birth +
                    ", maps=" + maps +
                    ", lists=" + lists +
                    ", dog=" + dog +
                    '}';
        }

        public String getLastName() {
            return lastName;
        }

        public void setLastName(String lastName) {
            this.lastName = lastName;
        }

        public Integer getAge() {
            return age;
        }

        public void setAge(Integer age) {
            this.age = age;
        }

        public Boolean getBoss() {
            return boss;
        }

        public void setBoss(Boolean boss) {
            this.boss = boss;
        }

        public Date getBirth() {
            return birth;
        }

        public void setBirth(Date birth) {
            this.birth = birth;
        }

        public Map<String, Object> getMaps() {
            return maps;
        }

        public void setMaps(Map<String, Object> maps) {
            this.maps = maps;
        }

        public List<Object> getLists() {
            return lists;
        }

        public void setLists(List<Object> lists) {
            this.lists = lists;
        }

        public Dog getDog() {
            return dog;
        }

        public void setDog(Dog dog) {
            this.dog = dog;
        }
    }

package com.bihu;

import com.bihu.Bean.JavaBean;
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;

@RunWith(SpringRunner.class)    //有了@RunWith(SpringRunner.class)这些类才能实例化到spring容器中，自动注入才能生效，
@SpringBootTest
public class ApplicationTests {


    //这里测试JavaBean
    @Autowired
    JavaBean Person;

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

}

发现小勾勾中文乱码 ，因为IDEA默认是UTF-8，我们在IDEA设置 查找 file Encodings ,编码换为UTF-8 右边是否转换ASCLL码 打钩即可

运行结果:

Person{lastName='BiHu', age=18, boss=false, birth=Fri Oct 10 00:00:00 CST 2025, maps={k1=value1, k2=value2}, lists=[v1, v2, v3, v4], dog=Dog{name='小勾勾', age=2}}

其实挺简单的

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