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
以下代码允许您使用字符串格式获取整个stackTrace,而无需使用log4J或java.util.Logger等API:
catch (Exception e) {
StackTraceElement[] stack = e.getStackTrace();
String exception = "";
for (StackTraceElement s : stack) {
exception = exception + s.toString() + "\n\t\t";
}
System.out.println(exception);
// then you can send the exception string to a external file.
}
其他回答
import java.io.PrintWriter;
import java.io.StringWriter;
public class PrintStackTrace {
public static void main(String[] args) {
try {
int division = 0 / 0;
} catch (ArithmeticException e) {
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String exceptionAsString = sw.toString();
System.out.println(exceptionAsString);
}
}
}
运行程序时,输出将类似:
java.lang.ArithmeticException: / by zero
at PrintStackTrace.main(PrintStackTrace.java:9)
这应该是有效的:
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String exceptionAsString = sw.toString();
我的oneliner将堆栈跟踪转换为封闭的多行字符串:
Stream.of(e.getStackTrace()).map((a) -> a.toString()).collect(Collectors.joining("\n", "[", "]"))
易于传递给记录器“原样”。
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)
public static String getStackTrace(Throwable t) {
StringWriter sw = new StringWriter();
t.printStackTrace(new PrintWriter(sw));
return sw.toString();
}
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