Spring—@PropertySource讀取properties配置檔案屬性

1、示例代碼Controller層

@Controller
@RequestMapping("/test")
@PropertySource("classpath:application.properties")
public class TestController {
    
    @Value("${name}")
    private String name;
    
    @RequestMapping("/string") //傳回字元串
    @ResponseBody
    public String rest() {
        return getName();
    }
}
           

2、示例代碼配置檔案：application.properties

name=${random.value}
age=12
           

3、注意事項

 @PropertySource：需加classpath指定配置檔案路徑，否則項目打war/jar包會抛異常

java.lang.IllegalStateException: Failed to load ApplicationContext

nested exception is java.io.FileNotFoundException: Could not open ServletContext resource [/application.properties]

Caused by: java.io.FileNotFoundException: Could not open ServletContext resource [/application.properties]