如何使用Spring转换服务将字符串值从属性文件自动转换为其他数据类型，即持续时间？

Question

How to auto convert string values from properties files to other data types ie duration using spring conversion service?

properties file

my.duration=PT10M

configuration class

@Value("{my.duration}")
//It'll give string value by default but I want to convert to duration
private Duration myDuration;

How can I achieve that using spring ConversionService ?

Answer 1

Here you can use YAML, if you want to populate a class with the values from resource files.

Duration.yaml

duration:
    val1: "PT"
    val2: "10"
    val3: "M"

Duration.java

@Configuration
@EnableConfigurationProperties
@ConfigurationProperties(prefix = "duration")
public class Duration {
    private String val1;
    private String val2;
    private String val3;

    // setters and getters.
}       

You can play around with this approach to get the desired output.