假设我们将环境变量导出为:
export SOME_STRING_CONFIG_PARAM="01"
和application.properties:
some.string.config.param=${SOME_STRING_CONFIG_PARAM:01}
注入Java字段:
@Value("${some.string.config.param}")
String someStringConfigfParam;
启动Spring应用程序后打印出该字段:
System.out.println("someStringConfigParam: " + someStringConfigParam);
结果:
someStringConfigParam: 1
如何告诉Spring该值应该被视为String?
最佳答案 我的演示项目得到了正确答案:
This is the Test Property Value = 01
但我在yml文件中遇到问题,原因是yml默认将01视为整数.只需使用双引号即可解决问题.
在yml文件中键入示例:
a: 123 # an integer
b: "123" # a string, disambiguated by quotes
c: 123.0 # a float
d: !!float 123 # also a float via explicit data type prefixed by (!!)
e: !!str 123 # a string, disambiguated by explicit type
f: !!str Yes # a string via explicit type
g: Yes # a boolean True (yaml1.1), string "Yes" (yaml1.2)
h: Yes we have No bananas # a string, "Yes" and "No" disambiguated by context.
也可以看看:
https://en.wikipedia.org/wiki/YAML
Do I need quotes for strings in Yaml?