本文共 6266 字,大约阅读时间需要 20 分钟。
本文翻译自:
有没有办法在Java中获取当前正在执行的方法的名称?
参考:
Use the following Code : 使用以下代码:
StackTraceElement[] stacktrace = Thread.currentThread().getStackTrace(); StackTraceElement e = stacktrace[1];//coz 0th will be getStackTrace so 1st String methodName = e.getMethodName(); System.out.println(methodName);
The fastest way I found is that: 我找到的最快的方法是:
import java.lang.reflect.Method;public class TraceHelper { // save it static to have it available on every call private static Method m; static { try { m = Throwable.class.getDeclaredMethod("getStackTraceElement", int.class); m.setAccessible(true); } catch (Exception e) { e.printStackTrace(); } } public static String getMethodName(final int depth) { try { StackTraceElement element = (StackTraceElement) m.invoke( new Throwable(), depth + 1); return element.getMethodName(); } catch (Exception e) { e.printStackTrace(); return null; } }}
It accesses the native method getStackTraceElement(int depth) directly. 它直接访问本机方法getStackTraceElement(int depth)。 And stores the accessible Method in a static variable. 并将可访问的Method存储在静态变量中。
This is an expansion on (above). 这是对的扩展(上图)。
It provides some static methods to get the current and invoking class / method names. 它提供了一些静态方法来获取当前和调用类/方法名称。
/* Utility class: Getting the name of the current executing method * https://stackoverflow.com/questions/442747/getting-the-name-of-the-current-executing-method * * Provides: * * getCurrentClassName() * getCurrentMethodName() * getCurrentFileName() * * getInvokingClassName() * getInvokingMethodName() * getInvokingFileName() * * Nb. Using StackTrace's to get this info is expensive. There are more optimised ways to obtain * method names. See other stackoverflow posts eg. https://stackoverflow.com/questions/421280/in-java-how-do-i-find-the-caller-of-a-method-using-stacktrace-or-reflection/2924426#2924426 * * 29/09/2012 (lem) - added methods to return (1) fully qualified names and (2) invoking class/method names */package com.stackoverflow.util;public class StackTraceInfo{ /* (Lifted from virgo47's stackoverflow answer) */ private static final int CLIENT_CODE_STACK_INDEX; static { // Finds out the index of "this code" in the returned stack trace - funny but it differs in JDK 1.5 and 1.6 int i = 0; for (StackTraceElement ste: Thread.currentThread().getStackTrace()) { i++; if (ste.getClassName().equals(StackTraceInfo.class.getName())) { break; } } CLIENT_CODE_STACK_INDEX = i; } public static String getCurrentMethodName() { return getCurrentMethodName(1); // making additional overloaded method call requires +1 offset } private static String getCurrentMethodName(int offset) { return Thread.currentThread().getStackTrace()[CLIENT_CODE_STACK_INDEX + offset].getMethodName(); } public static String getCurrentClassName() { return getCurrentClassName(1); // making additional overloaded method call requires +1 offset } private static String getCurrentClassName(int offset) { return Thread.currentThread().getStackTrace()[CLIENT_CODE_STACK_INDEX + offset].getClassName(); } public static String getCurrentFileName() { return getCurrentFileName(1); // making additional overloaded method call requires +1 offset } private static String getCurrentFileName(int offset) { String filename = Thread.currentThread().getStackTrace()[CLIENT_CODE_STACK_INDEX + offset].getFileName(); int lineNumber = Thread.currentThread().getStackTrace()[CLIENT_CODE_STACK_INDEX + offset].getLineNumber(); return filename + ":" + lineNumber; } public static String getInvokingMethodName() { return getInvokingMethodName(2); } private static String getInvokingMethodName(int offset) { return getCurrentMethodName(offset + 1); // re-uses getCurrentMethodName() with desired index } public static String getInvokingClassName() { return getInvokingClassName(2); } private static String getInvokingClassName(int offset) { return getCurrentClassName(offset + 1); // re-uses getCurrentClassName() with desired index } public static String getInvokingFileName() { return getInvokingFileName(2); } private static String getInvokingFileName(int offset) { return getCurrentFileName(offset + 1); // re-uses getCurrentFileName() with desired index } public static String getCurrentMethodNameFqn() { return getCurrentMethodNameFqn(1); } private static String getCurrentMethodNameFqn(int offset) { String currentClassName = getCurrentClassName(offset + 1); String currentMethodName = getCurrentMethodName(offset + 1); return currentClassName + "." + currentMethodName ; } public static String getCurrentFileNameFqn() { String CurrentMethodNameFqn = getCurrentMethodNameFqn(1); String currentFileName = getCurrentFileName(1); return CurrentMethodNameFqn + "(" + currentFileName + ")"; } public static String getInvokingMethodNameFqn() { return getInvokingMethodNameFqn(2); } private static String getInvokingMethodNameFqn(int offset) { String invokingClassName = getInvokingClassName(offset + 1); String invokingMethodName = getInvokingMethodName(offset + 1); return invokingClassName + "." + invokingMethodName; } public static String getInvokingFileNameFqn() { String invokingMethodNameFqn = getInvokingMethodNameFqn(2); String invokingFileName = getInvokingFileName(2); return invokingMethodNameFqn + "(" + invokingFileName + ")"; }}
public class SomeClass { public void foo(){ class Local {}; String name = Local.class.getEnclosingMethod().getName(); } }
name will have value foo. 名称将具有值foo。
String methodName =Thread.currentThread().getStackTrace()[1].getMethodName();System.out.println("methodName = " + methodName);
转载地址:http://cvcnb.baihongyu.com/