class being Annotated by @componenet can't have non Autowired fields-CodePudding

I want to create bean, but it tells me to not have field of type string or other type those their class definition not include @Component. ex .

@Component
public class MyDependancy {
  private String name;
  MyDependancy(){}
  MyDependancy(String name){this.name = name }
  // setter and getter of name field

}

it show compiler error : Could not autowire. No beans of 'String' type found. when I add @Autowired before declaration of name String, is give the same compiler error.

CodePudding user response：

It should work in the latest version of Spring as this behaviour is mentioned in docs as follows :

Similarly, if a class declares multiple constructors but none of them is annotated with @Autowired, then a primary/default constructor (if present) will be used.

As your example shows you do define a default constructor , so it should be used to create MyDependancy bean.

So I believe you are using an old version of Spring , most probably a version before 4.3 ?

CodePudding user response：

You need to create your bean explicitly in the configuration. You don't need any autowiring inside your class:

public class MyDependancy {
  private String name;
  MyDependancy(){}
  MyDependancy(String name){this.name = name }
  // setter and getter of name field

}

And in the @Configuration class:

@Bean
public MyDependancy myDependancy() {
  return new MyDependancy("Hello");
}

And then, from anywhere you can call to:

@Autowired
private MyDependancy myDependancy;

You can inject the name property in other ways as well.