Spring MVC reads configuration files through @PropertySource and @value

In this article, we will use the spring @propertysource and @value two annotations to read the values from the configuration file properties. First, a snippet of Java code:

@Component @propertysource (value= {"Classpath:common.properties", "Classpath:abc.properties"}) Public classconfigs {@Value ("${connect.api.apikeyid}")     PublicString Apikeyid; @Value ("${connect.api.secretapikey}")     PublicString Secretapikey;  PublicString Getapikeyid () {returnApikeyid; }     PublicString Getsecretapikey () {returnSecretapikey; }}

Let us specifically analyze:

1, @Component Note that this is an ordinary bean, component scanning will be scanned and injected into the bean container; We can automate the assembly in other places that reference this type. @Autowired This annotation indicates that the bean is automatically assembled. Like what:

@Controller  Public class HomeController {    @Autowired    private  configs configs;}

2, @PropertySource annotations are used to specify the path of the configuration file to read to read these configuration files, you can specify more than one configuration file;

3, @Value ("${connect.api.apikeyid}") is used to read the value of the property Key=connect.api.apikeyid and assigns the value to the property apikeyid;

4. Obtain the property value by providing a Get method, such as:

@Controller  Public class HomeController {    @Autowired    private  configs configs;         Private void throws Exception {        configs.getcardkey (), Consts.charset_utf8));}    }

Summarize:

@[email protected][email protected]== Powerful + convenient + efficient

Spring MVC reads configuration files through @PropertySource and @value