spring boot——配置文件——配置绑定—— @PropertySource 注解
作者:互联网
@PropertySource
如果将所有的配置都集中到 application.properties 或 application.yml 中,那么这个配置文件会十分的臃肿且难以维护,
因此我们通常会将与 Spring Boot 无关的配置(例如自定义配置)提取出来,写在一个单独的配置文件中,并在对应的 JavaBean 上使用 @PropertySource 注解指向该配置文件。
1. 以 helloworld 为例,将与 person 相关的自定义配置移动到 src/main/resources 下的 person.properties 中(注意,必须把 application.properties 或 application.yml 中的相关配置删除),如下图。
person.properties 的配置如下。
person.last-name=李四 person.age=12 person.birth=2000/12/15 person.boss=false person.maps.k1=v1 person.maps.k2=14 person.lists=a,b,c person.dog.name=dog person.dog.age=2
2. 在 Person 使用 @PropertySource 注解指向 person.properties,代码如下。
package net.biancheng.www.bean; import org.springframework.beans.factory.annotation.Value; import org.springframework.boot.context.properties.ConfigurationProperties; import org.springframework.context.annotation.PropertySource; import org.springframework.stereotype.Component; import java.util.Date; import java.util.List; import java.util.Map; @PropertySource(value = "classpath:person.properties")//指向对应的配置文件 @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; public Person() { } 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; } public Person(String lastName, Integer age, Boolean boss, Date birth, Map<String, Object> maps, List<Object> lists, Dog dog) { this.lastName = lastName; this.age = age; this.boss = boss; this.birth = birth; this.maps = maps; this.lists = lists; this.dog = dog; } @Override public String toString() { return "Person{" + "lastName='" + lastName + '\'' + ", age=" + age + ", boss=" + boss + ", birth=" + birth + ", maps=" + maps + ", lists=" + lists + ", dog=" + dog + '}'; } }
3. 重启项目,使用浏览器访问 “http://localhost:8081/hello”,结果如下图。
Spring Boot 将 person.properties 的属性注入
标签:PropertySource,配置文件,maps,spring,age,dog,person,birth,public 来源: https://www.cnblogs.com/xiaobaibailongma/p/16343865.html