java - 获取带有线程上下文的堆栈跟踪

Question

我正在尝试获取 Java 中线程的当前堆栈跟踪。我探索了以下方法:

1. 在 Java 中打印当前线程堆栈跟踪的最简单方法之一是使用 java.lang.Thread 类中的 dumpStack() 方法

2. 打印堆栈跟踪的另一种方法是使用 Throwable 类的 printStackTrace() 方法

是否还有其他方法可以更有效地获取 Java 中线程的当前堆栈跟踪？

下面是我设计的类..

public class StackTraceExample 
{ 
private static final Logger logger = Logger.getLogger(StringReplace.class.getName()); 
public static void main(String args[]) 
{
 //calling a method to print stack trace further down 
first();
} 

public static void first()
{ 
second(); 
}

 private static void second() 
 {
 third();
 } 

 private static void third()
 {
 //If you want to print stack trace on console than use dumpStack() method 
  System.err.println("Stack trace of current thread using dumpStack() method");
  Thread.currentThread().dumpStack(); 

  //This is another way to print stack trace from current method 

  System.err.println("Printing stack trace using printStackTrace() method of Throwable "); 
  new Throwable().printStackTrace();

  //If you want stack trace as StackTraceElement in program itself than 
  //use getStackTrace() method of Thread class

  StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();

  //Once you get StackTraceElement you can also print it to console 
  System.err.println("displaying Stack trace from StackTraceElement in Java");
  for(StackTraceElement st : stackTrace)
  {
  // System.err.println(st);
  } 
  }
  }

输出:-

Stack trace of current thread using dumpStack() method 
java.lang.Exception: Stack trace 
at java.lang.Thread.dumpStack(Thread.java:1249) 
at test.StringReplace.third(StringReplace.java:38) 
at test.StringReplace.second(StringReplace.java:31) 
at test.StringReplace.first(StringReplace.java:27)
at test.StringReplace.main(StringReplace.java:23)


Printing stack trace using printStackTrace() method of Throwable 
java.lang.Throwable
at test.StringReplace.third(StringReplace.java:42)
 at test.StringReplace.second(StringReplace.java:31)
 at test.StringReplace.first(StringReplace.java:27)
 at test.StringReplace.main(StringReplace.java:23) 
 displaying Stack trace from StackTraceElement in Java

Answer 1

Is there any other approach also by which we can get current stack trace of thread in Java that is more efficient?

没有。 thread.printStackTrace()(或 getStackTrace())是正确的方法。如果它是当前线程，那么它会在内部使用 Exception，但如果它是另一个线程，它会直接生成堆栈跟踪。

要补充的一点是，如果你想获取线程的堆栈跟踪但你不确定你是否会使用它，保存异常然后只调用 getStackTrace()< 应该会更高效 在需要的时候。在调用之前，堆栈跟踪不会在 Exception 中完全充实。有关详细信息，请参阅 Throwable.getOurStackTrace() 的代码。