将Throwable.getStackTrace()的结果转换为描述堆栈跟踪的字符串最简单的方法是什么?


当前回答

如果您使用的是Java 8,请尝试

Arrays.stream(e.getStackTrace())
                .map(s->s.toString())
                .collect(Collectors.joining("\n"));

您可以找到Throwable.java提供的getStackTrace()函数的代码:

public StackTraceElement[] getStackTrace() {
    return getOurStackTrace().clone();
}

对于StackTraceElement,它提供如下的toString():

public String toString() {
    return getClassName() + "." + methodName +
        (isNativeMethod() ? "(Native Method)" :
         (fileName != null && lineNumber >= 0 ?
          "(" + fileName + ":" + lineNumber + ")" :
          (fileName != null ?  "("+fileName+")" : "(Unknown Source)")));
}

因此,只需使用“\n”连接StackTraceElement。

其他回答

如果你是为Android开发的,一个更简单的方法是使用这个:

import android.util.Log;

String stackTrace = Log.getStackTraceString(exception); 

格式与getStacktrace相同,例如。

09-24 16:09:07.042:I/System.out(4844):java.lang.NullPointerException09-24 16:09:07.042:I/System.out(4844):在com.temp.ttscancel.MainActivity.onCreate(MainActivity.java:43)09-24 16:09:07.042:I/System.out(4844):在android.app.Activity.performCreate(Activity.java:5248)09-24 16:09:07.043:I/System.out(4844):在android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1110)09-24 16:09:07.043:I/System.out(4844):在android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2162)09-24 16:09:07.043:I/System.out(4844):在android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2257)09-24 16:09:07.043:I/System.out(4844):在android.app.ActivityThread.access$800(ActivityThread.java:139)09-24 16:09:07.043:I/System.out(4844):在android.app.ActivityThread$H.handleMessage(ActivityThread.java:1210)09-24 16:09:07.043:I/System.out(4844):在android.os.Handler.dispatchMessage(Handler.java:102)09-24 16:09:07.043:I/System.out(4844):在android.os.Looper.lop(Looper.java:136)09-24 16:09:07.044:I/System.out(4844):在android.app.ActivityThread.main(ActivityThread.java:5097)09-24 16:09:07.044:I/System.out(4844):在java.lang.reflect.Method.invokeNative(本机方法)09-24 16:09:07.044:I/System.out(4844):在java.lang.reflect.Method.invoke(Method.java:515)09-24 16:09:07.044:I/System.out(4844):在com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)09-24 16:09:07.044:I/System.out(4844):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)

将堆栈跟踪打印到字符串

import java.io.PrintWriter;
import java.io.StringWriter;

public class StackTraceUtils {
    public static String stackTraceToString(StackTraceElement[] stackTrace) {
        StringWriter sw = new StringWriter();
        printStackTrace(stackTrace, new PrintWriter(sw));
        return sw.toString();
    }
    public static void printStackTrace(StackTraceElement[] stackTrace, PrintWriter pw) {
        for(StackTraceElement stackTraceEl : stackTrace) {
            pw.println(stackTraceEl);
        }
    }
}

当您想要打印当前线程堆栈跟踪而不创建Throwable实例时,这非常有用,但请注意,创建新的Throwable并从中获取堆栈跟踪实际上比调用thread.getStackTrace更快、更便宜。

可以使用以下方法将异常堆栈跟踪转换为字符串。该类在Apache commons-lang中可用,这是许多流行开源中最常见的依赖库

org.apache.commons.lang.exception.ExceptionUtils.getStackTrace(可丢弃)

选项很少

StringWriter sw=新StringWriter();e.printStackTrace(新的PrintWriter(sw));字符串异常AsString=sw.toString();使用Google Guava libString stackTrace=Throwables.getStackTraceAsString(myException);org.apache.commons.lang.exception.ExceptionUtils.getStackTrace(可丢弃)

对Gala的回答进行了详细分析,其中还将包括例外情况的原因:

private String extrapolateStackTrace(Exception ex) {
    Throwable e = ex;
    String trace = e.toString() + "\n";
    for (StackTraceElement e1 : e.getStackTrace()) {
        trace += "\t at " + e1.toString() + "\n";
    }
    while (e.getCause() != null) {
        e = e.getCause();
        trace += "Cause by: " + e.toString() + "\n";
        for (StackTraceElement e1 : e.getStackTrace()) {
            trace += "\t at " + e1.toString() + "\n";
        }
    }
    return trace;
}