Java 如何将堆栈跟踪转换为字符串？

How can I convert a stack trace to a string?

提问by ripper234

What is the easiest way to convert the result of Throwable.getStackTrace()to a string that depicts the stacktrace?

将 的结果转换为Throwable.getStackTrace()描述堆栈跟踪的字符串的最简单方法是什么？

采纳答案by amar

One can use the following method to convert an Exceptionstack trace to String. This class is available in Apache commons-lang which is most common dependent library with many popular open sources

可以使用以下方法将Exception堆栈跟踪转换为String. 这个类在Apache commons-lang 中可用，它是许多流行的开源最常见的依赖库

org.apache.commons.lang.exception.ExceptionUtils.getStackTrace(Throwable)

org.apache.commons.lang.exception.ExceptionUtils.getStackTrace(Throwable)

回答by Brian Agnew

Use Throwable.printStackTrace(PrintWriter pw)to send the stack trace to an appropriate writer.

使用Throwable.printStackTrace(PrintWriter pw)堆栈跟踪发送到合适的作家。

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

// ...

StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
e.printStackTrace(pw);
String sStackTrace = sw.toString(); // stack trace as a string
System.out.println(sStackTrace);

回答by jqno

WARNING: Does not include cause (which is usually the useful bit!)

警告：不包括原因（这通常是有用的部分！）

public String stackTraceToString(Throwable e) {
    StringBuilder sb = new StringBuilder();
    for (StackTraceElement element : e.getStackTrace()) {
        sb.append(element.toString());
        sb.append("\n");
    }
    return sb.toString();
}

回答by D. Wroblewski

This should work:

这应该有效：

StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String exceptionAsString = sw.toString();

回答by Jarek Przygódzki

Printing stack trace to string

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);
        }
    }
}

It's useful when you want to print the current thread stack trace without creating instance of Throwable- but note that creating new Throwableand getting stack trace from there is actually faster and cheaper than calling Thread.getStackTrace.

当您想要打印当前线程的堆栈跟踪，而无需创建实例它是有用的Throwable-但请注意，创造新的Throwable和得到的堆栈跟踪与实际速度更快，也比电话更便宜Thread.getStackTrace。

回答by Vladas Dir?ys

For me the cleanest and easiest way was:

对我来说，最干净、最简单的方法是：

import java.util.Arrays;
Arrays.toString(e.getStackTrace());

回答by stumbav

Guava's Throwablesclass

番石榴Throwables类

If you have the actual Throwableinstance, Google Guavaprovides Throwables.getStackTraceAsString().

如果您有实际Throwable实例，Google Guava 会提供Throwables.getStackTraceAsString().

Example:

例子：

String s = Throwables.getStackTraceAsString ( myException ) ;

回答by Vicky Kapadia

If you are developing for Android, a far easier way is to use this:

如果您正在为 Android 开发，一个更简单的方法是使用它：

import android.util.Log;

String stackTrace = Log.getStackTraceString(exception); 

The format is the same as getStacktrace, for e.g.

格式与 getStacktrace 相同，例如

09-24 16:09:07.042: I/System.out(4844): java.lang.NullPointerException
09-24 16:09:07.042: I/System.out(4844):   at com.temp.ttscancel.MainActivity.onCreate(MainActivity.java:43)
09-24 16:09:07.042: I/System.out(4844):   at android.app.Activity.performCreate(Activity.java:5248)
09-24 16:09:07.043: I/System.out(4844):   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1110)
09-24 16:09:07.043: I/System.out(4844):   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2162)
09-24 16:09:07.043: I/System.out(4844):   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2257)
09-24 16:09:07.043: I/System.out(4844):   at android.app.ActivityThread.access0(ActivityThread.java:139)
09-24 16:09:07.043: I/System.out(4844):   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1210)
09-24 16:09:07.043: I/System.out(4844):   at android.os.Handler.dispatchMessage(Handler.java:102)
09-24 16:09:07.043: I/System.out(4844):   at android.os.Looper.loop(Looper.java:136)
09-24 16:09:07.044: I/System.out(4844):   at android.app.ActivityThread.main(ActivityThread.java:5097)
09-24 16:09:07.044: I/System.out(4844):   at java.lang.reflect.Method.invokeNative(Native Method)
09-24 16:09:07.044: I/System.out(4844):   at java.lang.reflect.Method.invoke(Method.java:515)
09-24 16:09:07.044: I/System.out(4844):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
09-24 16:09:07.044: I/System.out(4844):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)

09-24 16:09:07.042: I/System.out(4844): java.lang.NullPointerException
09-24 16:09:07.042: I/System.out(4844):   at com.temp.ttscancel.MainActivity.onCreate(MainActivity.java:43)
09-24 16:09:07.042: I/System.out(4844):   at android.app.Activity.performCreate(Activity.java:5248)
09-24 16:09:07.043: I/System.out(4844):   at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1110)
09-24 16:09:07.043: I/System.out(4844):   at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2162)
09-24 16:09:07.043: I/System.out(4844):   at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2257)
09-24 16:09:07.043: I/System.out(4844):   at android.app.ActivityThread.access0(ActivityThread.java:139)
09-24 16:09:07.043: I/System.out(4844):   at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1210)
09-24 16:09:07.043: I/System.out(4844):   at android.os.Handler.dispatchMessage(Handler.java:102)
09-24 16:09:07.043: I/System.out(4844):   at android.os.Looper.loop(Looper.java:136)
09-24 16:09:07.044: I/System.out(4844):   at android.app.ActivityThread.main(ActivityThread.java:5097)
09-24 16:09:07.044: I/System.out(4844):   at java.lang.reflect.Method.invokeNative(Native Method)
09-24 16:09:07.044: I/System.out(4844):   at java.lang.reflect.Method.invoke(Method.java:515)
09-24 16:09:07.044: I/System.out(4844):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
09-24 16:09:07.044: I/System.out(4844):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)

回答by rouble

Here is a version that is copy-pastable directly into code:

这是一个可直接复制粘贴到代码中的版本：

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

//Two lines of code to get the exception into a StringWriter
StringWriter sw = new StringWriter();
new Throwable().printStackTrace(new PrintWriter(sw));

//And to actually print it
logger.info("Current stack trace is:\n" + sw.toString());

Or, in a catch block

或者，在 catch 块中

} catch (Throwable t) {
    StringWriter sw = new StringWriter();
    t.printStackTrace(new PrintWriter(sw));
    logger.info("Current stack trace is:\n" + sw.toString());
}

回答by dumonderic

The following code allows you to get the entire stackTrace with a Stringformat, without using APIs like log4J or even java.util.Logger:

以下代码允许您使用某种String格式获取整个 stackTrace ，而无需使用诸如 log4J 之类的 API，甚至java.util.Logger：

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.
}