@PropertySource注解的使用

配置文件

在类路径下新建配置文件message.prope

message.name = haha
message.number = 1
message.title = java

1. 读取指定的配置文件

@PropertySource(value = {"classpath:message.properties"})指定配置文件的位置。

@ConfigurationProperties(prefix = "message")读取配置文件，将本类中的所有属性和配置文件中相关的配置进行绑定

@Component标识为一个 Spring 组件，因为只有是容器中的组件，容器才会为 @ConfigurationProperties提供此注入功能

@Component
@ConfigurationProperties(prefix = "message")
@PropertySource(value = {"classpath:message.properties"})
public class MessageProperties {
    private String name;
    private int number;
    private String title;

    public String getName() {
        return name;
    }

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

    public int getNumber() {
        return number;
    }

    public void setNumber(int number) {
        this.number = number;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    @Override
    public String toString() {
        return "MessageProperties{" +
                "name='" + name + '\'' +
                ", number=" + number +
                ", title='" + title + '\'' +
                '}';
    }
}

2. 演示

@Autowired
private MessageProperties messageProperties;

@Test
public void contextLoads() {
    System.out.println(messageProperties.toString());
    // MessageProperties{name='haha', number=1, title='java'}
}

参考

• https://blog.csdn.net/wangmx1993328/article/details/81005170