Springboot配置文件占位符

一、配置文件占位符

1、application.properties

server.port=8088
debug=false
product.id=ID:${random.uuid}
product.name=da mao mao
product.weight=${random.int}
product.fristLinePrice=${random.int(500,600)}
product.endLinePrice=${random.int[300,400]}
product.remark=${product.name}

2、SpringbootController

@RestController
public class SpringBootController {

    @Value("${product.id}")
    private String id;

    @Value("${product.name}")
    private String name;

    @Value("${product.weight}")
    private Integer weight;

    @Value("${product.fristLinePrice}")
    private Integer fristLinePrice;

    @Value("${product.endLinePrice}")
    private Integer endLinePrice;

    @Value("${product.remark}")
    private String remark;

    @RequestMapping("/proper")
    public String getProper() {
        System.out.println("SpringBootController{" +
                "id='" + id + '\'' +
                ", name='" + name + '\'' +
                ", weight=" + weight +
                ", fristLinePrice=" + fristLinePrice +
                ", endLinePrice=" + endLinePrice +
                ", remark='" + remark + '\'' +
                '}');

        return "hello!!!";
    }
}

3、result

SpringBootController{
　　id='ID:188b528a-508f-44aa-9b5e-43c1af7b14e3', 
　　name='da mao mao', 
　　weight=237719179, 
　　fristLinePrice=572, 
　　endLinePrice=380, 
　　remark='da mao mao'
}

二、配置文件获取之前的值(如果该值有,直接获取,如果没有使用默认值):此处由于前面的配置中没有product.name,那么他就使用默认值 xiao mao mao

server.port=8088
debug=false

product.id=ID:${random.uuid}
product.weight=${random.int}
product.fristLinePrice=${random.int(500,600)}
product.endLinePrice=${random.int[300,400]}
product.remark=${product.name:xiao mao mao}

SpringBootController{
　　id='ID:fcf731f3-c028-452a-a831-a25c1bf41d33', 
　　name='null', 
　　weight=-1450910103, 
　　fristLinePrice=584, 
　　endLinePrice=357, 
　　remark='xiao mao mao'
}