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[英]javassist throws ClassNotFoundException when loading external classes from jar
[英]Running testNG programmatically by pointing to an external jar throws ClassNotFoundException
我想通过指向包含测试类的jar来以编程方式运行TestNG测试。 为此,首先解析testng.xml并获取类。 然后,使用URLCLassLoader
将每个类加载到类路径中。 但这会引发org.testng.TestNGException: Cannot find class in classpath:
异常中org.testng.TestNGException: Cannot find class in classpath:
。
下面是我尝试的代码
public void execute() {
String testNGXmlPath = "/path/to/testng.xml";
try {
getClassesToLoad(testNGXmlPath);
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
}
TestNG testng = new TestNG();
List<String> suites = Lists.newArrayList();
suites.add(testNGXmlPath);
testng.setTestSuites(suites);
testng.run();
}
public void getClassesToLoad(String path) throws ParserConfigurationException, IOException, SAXException {
File inputFile = new File(path);
DocumentBuilderFactory dbFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder dBuilder = dbFactory.newDocumentBuilder();
Document doc = dBuilder.parse(inputFile);
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getElementsByTagName("class");
Element element;
Node node;
NamedNodeMap namedNodeMap;
int i, length;
length = nodeList.getLength();
for (int j=0; j < length; j++) {
element = (Element)nodeList.item(j);
namedNodeMap = element.getAttributes();
if (namedNodeMap != null) {
for (i=0; i<namedNodeMap.getLength(); i++) {
node = namedNodeMap.item(i);
if (node.getNodeName() == "name") {
try {
loadClass("/path/to/testng.sample-1.0-SNAPSHOT.jar", node.getNodeValue());
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
}
}
}
}
}
}
public static void loadClass(String jarFilePath, String className) throws MalformedURLException,
ClassNotFoundException {
File jarFile = new File(jarFilePath);
if (jarFile.isFile()) {
URL url = jarFile.toURL();
URL[] urls = new URL[] { url };
ClassLoader cl = new URLClassLoader(urls);
cl.loadClass(className);
}
}
您正在使用URLClassLoader加载类加载器,但是要使您的类加载器加载的类对当前ContextualClassLoader可见,您需要对其进行设置。
请尝试通过Thread.currentThread().setContextClassLoader();
在loadClass()
方法中,然后尝试运行测试。 这样可以确保当TestNG启动时,它将使用您注入到当前线程中的ContextClassLoader
来加载类,从而帮助您克服ClassNotFoundException
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