从另一个类的静态方法中调用spring注入类

Question

Well, i have a class with @Component anotation, this class makes some selects in database, see:

@Component(value = "parametroRelatorioHelper")
public class ParametroRelatorioHelper {

    @Autowired
    private BasicDAO dao;

    public ParametroRelatorio getParametroByNome(String nome) {

        List<ParametroRelatorio> parametros = (List<ParametroRelatorio>) dao
                .findByNamedQuery(ParametroRelatorio.FIND_BY_NOME,
                        new NamedParams("nome", nome));

        if (parametros.size() > 0)
            return parametros.get(0);
        else
            return null;
    }

    public List<ParametroRelatorio> getAll() {

        return (List<ParametroRelatorio>) dao
                .findByNamedQuery(ParametroRelatorio.FIND_ALL);

    }

    public BasicDAO getDao() {
        return dao;
    }

    public void setDao(BasicDAO dao) {
        this.dao = dao;
    }
}

Now, i have a "Helper" class, where user can call your method directly (static method) but i need call a method from ParametroRelatorioHelper, see:

public class ReportHelper {
  public static void call(){
      //how can i do it without @Component injection
      parametroRelatorioHelper.getAll();
   }
}

Answer 1

听起来您的体系结构是不正确的，相反，ReportHelper也应该是一个组件，并且应该在其中注入依赖项，否则它与Spring IOC的思想冲突，helper方法不应依赖于服务上的组件。