java - spring boot 1.2.5 @Configuration @Autowired annotation null? -

primarydatasourceproperties.java application.properties content, right.

datasourceconfig.java inside method @bean ... primarydatasource () no primarydatasourceproperties, primarydatasourceproperties null, @autowired injected, problem

may ask reason?

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btw:

demoapplication.java try joinenableautoconfiguration , primarydatasourceproperties.java try @component

the result no different

here code:

resources/application.properties

datasource.primary.driver-class-name=com.mysql.jdbc.driver datasource.primary.url=jdbc:mysql://localhost:3306/demo?characterencoding=utf8 datasource.primary.username=root datasource.primary.password= 

com.demo.config.primarydatasourceproperties.java

@configurationproperties(prefix="datasource.primary") public class primarydatasourceproperties {     private string driverclassname;     private string url;     private string username;     private string password;      public string getdriverclassname() {         return driverclassname;     }      public void setdriverclassname(string driverclassname) {         this.driverclassname = driverclassname;     }      public string geturl() {         return url;     }      public void seturl(string url) {         this.url = url;     }      public string getusername() {         return username;     }      public void setusername(string username) {         this.username = username;     }      public string getpassword() {         return password;     }      public void setpassword(string password) {         this.password = password;     } } 

com.demo.config.datasourceconfig.java

@configuration public class datasourceconfig {      @autowired     private primarydatasourceproperties primarydatasourceproperties;      @bean     @primary     public datasource primarydatasource() {       // primarydatasourceproperties null ?     } } 

com.demo.demoapplication.java

@springbootapplication public class demoapplication {     public static void main(string[] args) throws exception {         springapplication.run(demoapplication.class, args);     } } 

you have add annotation @enableconfigurationproperties either demoapplication or configuration class. see manual topic.