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

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;
}

其他回答

Kotlin>=1.4

在Throwable上使用内置函数stackTraceToString()。

Kotlin<1.4

扩展Throwable类将提供String属性error.stackTraceString:

val Throwable.stackTraceString: String
  get() {
    val sw = StringWriter()
    val pw = PrintWriter(sw)
    this.printStackTrace(pw)
    return sw.toString()
  }

番石榴的丢弃类

如果您有实际的Throwables实例,GoogleGuava提供Throwables.getStackTraceAsString()。

例子:

String s = Throwables.getStackTraceAsString ( myException ) ;
 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)

解决方案是将数组的stackTrace转换为字符串数据类型。请参见以下示例:

import java.util.Arrays;

try{

}catch(Exception ex){
    String stack = Arrays.toString(ex.getStackTrace());
    System.out.println("stack "+ stack);
}

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)