Iva*_*kyy 4 java dependency-injection guice
我有一个实用方法:
public static void MyUtility(ClassWhoDoesImportantThink instance,
Object params...){...}
Run Code Online (Sandbox Code Playgroud)
通常我这样调用这个方法:
public class UsualClass{
...
@Inject
ClassWhoDoesImportantThink importantInstance;
...
public aMethod(){
...
UtilityClass.myItility(importantInstance, arg1, arg2);
...
}
}
Run Code Online (Sandbox Code Playgroud)
其中 @Inject 是 Guice 功能。但也许存在一种将“importantInstance”直接注入我的静态实用程序的方法?有点像:
public static void MyUtility( Object params...){
ClassWhoDoesImportantThink instance =
GuiceFeature.getObjectUsuallyInjected(ClassWhoDoesImportantThink.class);
... //Do job
}
Run Code Online (Sandbox Code Playgroud)
在MyUtility:
@Inject
static ClassWhoDoesImportantThink importantInstance;
Run Code Online (Sandbox Code Playgroud)
或者,另一种选择:
static ClassWhoDoesImportantThink importantInstance;
@Inject static void setImportantInstance(ClassWhoDoesImportantThink importantInstance) {
MyUtility.importantInstance = importantInstance;
}
Run Code Online (Sandbox Code Playgroud)
并在适当的 Guice 模块configure()方法中:
requestStaticInjection(MyUtility.class);
Run Code Online (Sandbox Code Playgroud)
然后 Guice 将在其初始设置期间注入静态变量或设置器,并且MyUtility静态方法可以简单地使用静态字段。