Java获取堆栈信息的三种方法小结

StackTraceElement[] stackTraceElements = Thread.currentThread().getStackTrace();
for (StackTraceElement element : stackTraceElements) {
    System.out.println(element.getClassName() + " -> " + element.getMethodName() + " : " + element.getLineNumber());
}

Throwable t = new Throwable();
StackTraceElement[] stackTraceElements = t.getStackTrace();
for (StackTraceElement element : stackTraceElements) {
    System.out.println(element.getClassName() + " -> " + element.getMethodName() + " : " + element.getLineNumber());
}

ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(true, true);
for (ThreadInfo info : threadInfos) {
    System.out.println(info.getThreadName());
    StackTraceElement[] stackTraceElements = info.getStackTrace();
    for (StackTraceElement element : stackTraceElements) {
        System.out.println("\t" + element.getClassName() + " -> " + element.getMethodName() + " : " + element.getLineNumber());
    }
}

import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.IOException;
public class StackTraceExample {
    public static void main(String[] args) {
        try {
            // 模拟一个空指针异常
            String str = null;
            str.length();
        } catch (Exception e) {
            // 在错误日志中记录堆栈信息
            logStackTrace(e);
        }
    }
    public static void logStackTrace(Exception e) {
        try (FileWriter fileWriter = new FileWriter("error.log");
             PrintWriter printWriter = new PrintWriter(fileWriter)) {
            printWriter.println("发生异常：" + e.toString());
            printWriter.println("堆栈信息：");
            for (StackTraceElement element : e.getStackTrace()) {
                printWriter.println(element.getClassName() + " -> " + element.getMethodName() + " : " + element.getLineNumber());
            }
            System.out.println("堆栈信息已记录到error.log文件中");
        } catch (IOException ex) {
            System.err.println("记录堆栈信息发生错误：" + ex.getMessage());
        }
    }
}

public class CurrentThreadExample {
    public static void main(String[] args) {
        Thread currentThread = Thread.currentThread();
        String threadName = currentThread.getName();
        System.out.println("当前线程的名称是：" + threadName);
    }
}