子类中的 Java 记录器
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Java Logger in subclass
提问by Nicklas
To get C.run() to use its own class logger, should I add a public/protected method getLogger() in B?
为了让 C.run() 使用它自己的类记录器，我应该在 B 中添加一个公共/受保护的方法 getLogger() 吗？
public abstract class A extends Thread {
@Override
public abstract void run();
}
public class B extends A {
private static final Logger logger = Logger.getLogger(B.class.getName());
@Override
protected void run() {
// do something
logger.info("B");
}
}
public class C extends B {
}
回答by planetjones
Well the Loggers are ideally set at Class level. So if C needs it own Logger then declare its own Logger in C e.g.
那么 Loggers 理想情况下设置在 Class 级别。所以如果 C 需要它自己的记录器，那么在 C 中声明它自己的记录器，例如
private static final Logger logger = Logger.getLogger(C.class.getName());
This way when C runs some code it logs to its own Logger and when B runs it logs to its own Logger. You'll be able to clearly see which Class logs what this way.
这样，当 C 运行某些代码时，它会记录到自己的 Logger 中，而当 B 运行时，它会记录到自己的 Logger 中。您将能够清楚地看到哪个类以这种方式记录了什么。
If this isn't what you're after please expand the question with what you're trying to achieve and why.
如果这不是您所追求的，请用您想要实现的目标以及原因来扩展问题。
I'm not convinced if the following code is a good idea (I always want the Class which is physically running the code to be the Logger) but it should work:
我不相信以下代码是否是个好主意（我总是希望实际运行代码的类是记录器），但它应该可以工作：
public abstract class A extends Thread {
@Override
public abstract void run();
protected abstract Logger getLogger();
}
public class B extends A {
private static final Logger logger = Logger.getLogger(B.class.getName());
@Override
public void run() {
getLogger().info("B");
}
@Override
protected Logger getLogger() {return logger;);
}
public class C extends B {
private static final Logger logger = Logger.getLogger(C.class.getName());
@Override
protected Logger getLogger() {return logger;);
}
回答by StKiller
You may use this in base class:
您可以在基类中使用它：
protected Logger logger = Logger.getLogger(this.getClass().getName());
this.getClass()will initialize the logger with subclass name.
this.getClass()将使用子类名称初始化记录器。
