testng.xml顺序执行case

<?xml version="1.0" encoding="UTF-8"?>
<suite name="testng_LETV">
<parameter name="appDir" value="./apk" />
<parameter name="appName" value="pili-streaming-demo-automation-test-v0.1" />
<parameter name="port" value="3241" />
<parameter name="udid" value="D6SGOBS8WOSSVOJB" />
<parameter name="isHw" value="1" />
<parameter name="isFrontCamera" value="1" />
<parameter name="isFlash" value="1" />
<test name="Test"preserve-order="true">
<classes>
<class name="qappiumtest.PLCameraStreaming" />
<methods>
<include name="method1" />
<include name="method3" />
<include name="method2" />
</methods>
</classes>
</test>
</suite>