Springboot 配置 properties 文件与映射到java类

原创已于 2022-04-24 10:55:21 修改 · 860 阅读

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#spring

于 2022-04-24 10:51:05 首次发布

本文介绍了如何在Springboot项目中配置properties文件，并将配置内容映射到对应的Java类，通过实例展示了Dog和Person类的使用，以及properties文件中的配置方式和测试方法。

乱码：

<!--配置  yml文件处理器-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
    <optional>true</optional>
</dependency>

完整代码：

Dog类

public class Dog {
    String name;
    int age;
    @Override
    public String toString() {
        return "Dog{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

person 类

Person 类
//将配置文件中的值映射到person中
//@ConfigurationProperties 告诉springboot将本类中的所有属性与配置文件中相关的属性配置
//这个组件是容器中的组件，才能提供功能加@Component注解
@Component
@ConfigurationProperties(prefix = "person")
public class Person {
    String name;
    int age;
    Date birth;
    Map<String,Object> map;
    Dog dog;
    List list;

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", birth=" + birth +
                ", map=" + map +
                ", dog=" + dog +
                ", list=" + list +
                '}';
    }

    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;
    }

    public Date getBirth() {
        return birth;
    }

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

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

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

    public Dog getDog() {
        return dog;
    }

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

    public List getList() {
        return list;
    }

    public void setList(List list) {
        this.list = list;
    }
}

properties 文件中的配置：

server.port=8081
person.name=sunchao
person.age=22
person.birth=2022/12/12
person.map.k1=k1
person.list=a,bc,c
person.dog.name=xiaogou
person.dog.age=2

测试：

package com.sunchao.demo;

import com.sunchao.demo.bean.Person;
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 DemoApplicationTests {
    @Autowired
    Person person;
    @Test
    void contextLoads() {
        System.out.println(person);
    }
}