java - 吉斯。注入(inject)静态方法

Question

我有一个实用方法:

public static void MyUtility(ClassWhoDoesImportantThink instance, 
                             Object params...){...}

通常我这样调用这个方法:

public class UsualClass{
  ...
  @Inject
  ClassWhoDoesImportantThink importantInstance;
  ...
  public aMethod(){
     ...

     UtilityClass.myItility(importantInstance, arg1, arg2);
     ...
  }
}

@Inject 是 Guice 特性。 但也许存在一种将“importantInstance”直接注入(inject)我的静态实用程序的方法？像:

public static void MyUtility( Object params...){
   ClassWhoDoesImportantThink instance = 
     GuiceFeature.getObjectUsuallyInjected(ClassWhoDoesImportantThink.class);
   ... //Do job
}

Answer 1

在 MyUtility 中:

  @Inject
  static ClassWhoDoesImportantThink importantInstance;

或者，或者:

  static ClassWhoDoesImportantThink importantInstance;
  @Inject static void setImportantInstance(ClassWhoDoesImportantThink importantInstance) {
    MyUtility.importantInstance = importantInstance;
  }

并在适当的 Guice 模块 configure() 方法中:

  requestStaticInjection(MyUtility.class);

Guice 然后会在其初始设置期间注入(inject)静态变量或 setter，MyUtility 静态方法可以简单地使用静态字段。