如何從Java中的異常stackTrace獲取特定程序包

Question

我只想從異常stackTrace中打印特定的程序包。 如何實現呢？

例如，考慮以下堆棧跟蹤

com.mongodb.MongoInternalException: DBPort.findOne failed
    at com.mongodb.DBPort.findOne(DBPort.java:153)
    at com.mongodb.DBPort.runCommand(DBPort.java:159)
    at com.mongodb.DBTCPConnector.testMaster(DBTCPConnector.java:371)

    at com.myapp.foo.MongoConnection.java:10
    at com.myapp.foo.MongoConnection.java:27

我只想在具有行號和methodName的stackTrace中打印包“ com.myapp.foo”

Answer 1

像這樣的事情呢：

try {
  throw new RuntimeException();
}
catch (RuntimeException e) {
  StackTraceElement[] stackTrace = e.getStackTrace();

  for (StackTraceElement stackTraceElement : stackTrace) {
    String className = stackTraceElement.getClassName();
    int pos = className.lastIndexOf('.');
    String packageName = className.substring(0, pos);
    System.out.println("Package:" + packageName +
        ", method: "+ stackTraceElement.getMethodName() +
        ", line:" + stackTraceElement.getLineNumber());
  }
}

您當然可以添加所需的任何自定義包裝過濾。