报错如下：
org.testng.TestNGException:
Cannot find class in classpath: TestNGExample
at org.testng.xml.XmlClass.loadClass(XmlClass.java:81)
at org.testng.xml.XmlClass.init(XmlClass.java:73)
at org.testng.xml.XmlClass.<init>(XmlClass.java:59)
at org.testng.xml.TestNGContentHandler.startElement(TestNGContentHandler.java:543)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:506)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:182)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.emptyElement(XMLDTDValidator.java:766)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanStartElement(XMLDocumentFragmentScannerImpl.java:1347)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2768)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:846)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:775)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:123)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1210)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:628)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl.parse(SAXParserImpl.java:332)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:195)
at org.testng.xml.XMLParser.parse(XMLParser.java:39)
at org.testng.xml.SuiteXmlParser.parse(SuiteXmlParser.java:17)
at org.testng.xml.SuiteXmlParser.parse(SuiteXmlParser.java:10)
at org.testng.xml.Parser.parse(Parser.java:168)
at org.testng.TestNG.initializeSuitesAndJarFile(TestNG.java:311)
at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:88)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)
问题原因是，没有配置testng的环境配置，包括classpath+path
解决方法：
设置TestNG的环境
设置TESTNG_HOME环境变量指向TestNG的jar 存放在您的机器上的基本目录位置。假设，我们已经储存了testng-6.8.jar， TestNG各种操作系统上的文件夹如下：
| OS | 输出 |
|---|
| Windows | Set the environment variable TESTNG_HOME to C:\TESTNG |
| Linux | export TESTNG_HOME=/usr/local/TESTNG |
| Mac | export TESTNG_HOME=/Library/TESTNG |
设置CLASSPATH变量
设置CLASSPATH环境变量指向TestNG的jar文件位置。假设，我们已经储存了testng-6.8.jar, TestNG在各种操作系统上的文件夹如下：
| OS | 输出 |
|---|
| Windows | 设置环境变量 CLASSPATH 为 %CLASSPATH%;%TESTNG_HOME%\testng-6.8.jar; |
| Linux | export CLASSPATH=$CLASSPATH:$TESTNG_HOME/testng-6.8.jar: |
| Mac | export CLASSPATH=$CLASSPATH:$TESTNG_HOME/testng-6.8.jar: |
来源：http://blog.csdn.net/bk_test/article/details/43450521
