Java 或 JavaC 一直说找不到或不存在包

Question

我在尝试运行 Maven 项目中的 Java 文件时遇到了障碍。我在运行 a Java Class 的位置设置了它，在使用运行 exec 到运行其余测试之前做了一些设置在行家。我可以在 IDE 工具 (Eclipse) 中运行编程，但是当我从 CMD 或 Git Bash 编程运行时，我不断收到错误提示ClassDef not found 或 package/import 不存在，（即使它在 IDE 和 Mvn 命令上工作正常以测试 classes。我尝试使用Javac - cp .看看新的设置是否会消除错误，但我得到了类似的错误。我四处寻找了几个不同的答案，他们要么没有解决问题，要么把我的项目处于更糟糕的状态。现在，我不确定问题的确切原因是什么，也不确定解决此问题的最佳解决方案。

这是我的问题的一个例子，我试图编译连接到 Java 文件的 java 文件之一，我想要运行，这将运行专家：

 $ javac -d build/classes -sourcepath src -cp target/classes src/AppiumDriverSetUp_Lib/XMLMaker.java
src\AppiumDriverSetUp_Lib\XMLMaker.java:28: error: package io.appium.java_client does not exist
import io.appium.java_client.AppiumDriver;
                            ^
src\AppiumDriverSetUp_Lib\XMLMaker.java:29: error: package io.appium.java_client does not exist
import io.appium.java_client.MobileElement;
                            ^
src\AppiumDriverSetUp_Lib\XMLMaker.java:49: error: cannot find symbol
        public void setupDriverXMLFile(List <AppiumDriver<MobileElement>> driverList) {
                                             ^
  symbol:   class AppiumDriver
  location: class XMLMaker
src\AppiumDriverSetUp_Lib\XMLMaker.java:49: error: cannot find symbol
        public void setupDriverXMLFile(List <AppiumDriver<MobileElement>> driverList) {
                                                          ^
  symbol:   class MobileElement
  location: class XMLMaker
src\AppiumDriverSetUp_Lib\XMLMaker.java:67: error: cannot find symbol
                        for(AppiumDriver<MobileElement> driver: driverList) {
                            ^
  symbol:   class AppiumDriver
  location: class XMLMaker
src\AppiumDriverSetUp_Lib\XMLMaker.java:67: error: cannot find symbol
                        for(AppiumDriver<MobileElement> driver: driverList) {
                                         ^
  symbol:   class MobileElement
  location: class XMLMaker
6 errors

AppiumDriverSetUp_Lib 包中的 XMLMaker 文件：

import io.appium.java_client.AppiumDriver;
import io.appium.java_client.MobileElement;

public class XMLMaker {



    public DocumentBuilderFactory docDriverSetup;

    public DocumentBuilder driverSetup;

    public int connectedDevices = 0;

    public Document doc;


    TransformerFactory transformerFactory = TransformerFactory.newInstance();

    Transformer transformer;


    public void setupDriverXMLFile(List <AppiumDriver<MobileElement>> driverList) {

        System.out.println("List size: "+ driverList.size());
        try {

            docDriverSetup = DocumentBuilderFactory.newInstance();

            driverSetup = docDriverSetup.newDocumentBuilder();

            doc = driverSetup.newDocument();

            transformer = transformerFactory.newTransformer();

            transformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, "http://testng.org/testng-1.0.dtd");

            Element suiteElement = doc.createElement("suite");
            suiteElement.setAttribute("name", "All-tests");

            for(AppiumDriver<MobileElement> driver: driverList) {

                Element rootElement = doc.createElement("test");
                suiteElement.appendChild(rootElement);
                rootElement.setAttribute("name", (String) driver.getCapabilities().getCapability("deviceId"));

                Element deviceNameEle = doc.createElement("parameter");
                deviceNameEle.setAttribute("name", "deviceName");
                deviceNameEle.setAttribute("value", (String) driver.getCapabilities().getCapability("deviceId"));
                rootElement.appendChild(deviceNameEle);

                Element platformEle = doc.createElement("parameter");
                platformEle.setAttribute("name", "platform");
                platformEle.setAttribute("value", driver.getPlatformName()+"");
                rootElement.appendChild(platformEle);

                Element udidEle = doc.createElement("parameter");
                udidEle.setAttribute("name", "udid");
                udidEle.setAttribute("value", (String)driver.getCapabilities().getCapability("udid"));
                rootElement.appendChild(udidEle);

                Element urlPort = doc.createElement("parameter");
                urlPort.setAttribute("name", "URL");
                urlPort.setAttribute("value", (String)driver.getCapabilities().getCapability("appiumURL"));
                rootElement.appendChild(urlPort);

                Element devicePort = doc.createElement("parameter");

                if((driver.getPlatformName()+"").
                        toLowerCase().contains("android")) {
                        devicePort.setAttribute("name", "port");
                        devicePort.setAttribute("value", driver.getCapabilities().getCapability("systemPort")+"");

                }
                if ((driver.getPlatformName()+"").
                        toLowerCase().contains("ios")) {
                        devicePort.setAttribute("name", "port");
                        devicePort.setAttribute("value", (String)driver.getCapabilities().getCapability("wdaLocalPort"));
                }

                rootElement.appendChild(devicePort);

                Element packages = doc.createElement("packages");
                rootElement.appendChild(packages);
                Element packageName = doc.createElement("package");
                packageName.setAttribute("name", "BaseTest");
                packages.appendChild(packageName);


                connectedDevices++;
            }   
            suiteElement.setAttribute("parallel", "tests");
            suiteElement.setAttribute("thread-count", connectedDevices+"");
            doc.appendChild(suiteElement);

        } catch(ParserConfigurationException pce) {
            pce.printStackTrace();
        } catch (TransformerConfigurationException e) {
            e.printStackTrace();
        } 

    }


    public void createDriverFile() throws TransformerConfigurationException, InterruptedException, IOException {

        DOMSource source = new DOMSource(doc);

        FileOutputStream streamNewFile = new FileOutputStream("./drivers.xml");
        PrintWriter pw = new PrintWriter(streamNewFile);
        StreamResult result = new StreamResult(pw);


        try {

            transformer.transform(source, result);
            result.getWriter().close();

            System.out.println("File Updated");



        } catch (TransformerException e) {
            e.printStackTrace();
            System.out.println("Error updating the file");
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("Unable to close output stream");
        }

    }

}

这是我尝试编译 Java 文件以开始测试时出现的问题：

$ javac -d build/classes -sourcepath src -cp target/classes src/BaseTest/DriverTest.java
src\BaseTest\DriverTest.java:29: error: cannot access AppiumDriver
                makeFile.setupDriverXMLFile(createDrivers.getActiveList());
                        ^
  class file for io.appium.java_client.AppiumDriver not found
1 error

BaseTest 包中的 DriverTest：

import AppiumDriverSetUp_Lib.AppiumDriverSetup;
import AppiumDriverSetUp_Lib.XMLMaker;

public class DriverTest {

    public AppiumDriverSetup createDrivers = new AppiumDriverSetup();

    public XMLMaker makeFile = new XMLMaker();

    public static void main(String [] args) throws TransformerConfigurationException, IOException, InterruptedException {
        System.out.println("Setting up drivers:");

        DriverTest startTest = new DriverTest();
        startTest.driverFileSetup();
        startTest.runSuite();
    }

    public void driverFileSetup() throws IOException, TransformerConfigurationException, InterruptedException {
        createDrivers.makeList();
        makeFile.setupDriverXMLFile(createDrivers.getActiveList());
        makeFile.createDriverFile();
    }

    public void runSuite() throws IOException, InterruptedException {
        Runtime rt = Runtime.getRuntime();
        String cmd = "cmd /c mvn test -Dplat="+System.getProperty("plat");
        Process p = rt.exec(cmd);
        InputStream input = p.getInputStream();
        testFeed(input, System.out);
        p.waitFor();
    }

    public void testFeed(InputStream in, OutputStream out) throws IOException {
        while (true) {
            int c = in.read();
            if (c == -1) {
                break;
            }
            out.write((char)c);
        }
    }

}

在我的 XMLMaker class 中，它已经正确导入了 AppiumDriver 和 MobileElement，作为我的 IDE 中正确的导入选项之一。如果我用 mvn 运行没问题。我认为问题与我对该项目的依赖关系有关。有没有人经历过这样的情况？

Answer 1

听起来您在命令行中所做的任何事情都没有完全包含构建它所需的类。在 Eclipse 中，您可能会引用必要的 JAR 文件。

我的建议 - 如果您使用 Maven 来实现构建自动化（您应该这样做），那么应该完整地使用它，构建过程将自动为您完成所有这些工作。

在你的情况下，我想只要确保 javac 知道在哪里可以找到 XMLMaker 的 jar 文件，并且可以找到必要的依赖项。

Java 或 JavaC 一直说找不到或不存在包

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