java - невозможно разбить строку на новой строке из JSON

Question

Я пишу простую java-программу для чтения JSON-файла и извлечения из него определенной информации. Однако функция разделения String не разделяет строку на new line ИЛИ \n символ.

Ниже мой JSON файл - sample.json

{ 
    "seleniumLog": [ 
    { 
     "commandName": "sendKeys", 
     "args": [ 
     "[[\"testUSER\",\"xpath\\u003d//UIAApplication[1]/UIAWindow[2]/UIATextField[1]\"]]" 
     ], 
     "result": "fail", 
     "subLogs": [ 
     { 
      "commandName": "getCurrentWindowHandle", 
      "args": [ 
      "{}" 
      ], 
      "result": "Not implemented in this context, try switching into or out of a web view (WARNING: The server did not provide any stacktrace information)\nCommand duration or timeout: 6 milliseconds\nBuild info: version: '2.39.0', revision: 'ff23eac', time: '2013-12-16 16:11:15'\nSystem info: host: 'testUSER-SIRs-MacBook-Pro.local', ip: '127.0.0.1', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.8.5', java.version: '1.6.0_65'\nSession ID: aced75a4-2bd9-4147-8346-1973371d2f97\nDriver info: com.infostretch.automation.ui.webdriver.QAFExtendedWebDriver\nCapabilities [{platform=MAC, app=/Users/testUSER/IAirwaysPG.app, javascriptEnabled=true, browserName=, desired={\"app\":\"/Users/testUSER/IAirwaysPG.app\",\"platformVersion\":\"7.1\",\"deviceName\":\"iPhone Simulator\",\"platformName\":\"iOS\",\"browserName\":\"\"}, locationContextEnabled=false, version=, platformVersion=7.1, databaseEnabled=false, cssSelectorsEnabled=true, platformName=ios, deviceName=iPhone Simulator, browser_name=, webStorageEnabled=false, warnings={}, takesScreenshot=true}]", 
      "subLogs": [] 
     } 
     ] 
    } 
    ], 
    "checkPoints": [ 
    { 
     "message": "Browser: ", 
     "type": "Info", 
     "screenshot": "", 
     "subCheckPoints": [] 
    }, 
    { 
     "message": "sendKeys [\"testUSER\",\"xpath\\u003d//UIAApplication[1]/UIAWindow[2]/UIATextField[1]\"] into {1}", 
     "type": "TestStepFail", 
     "subCheckPoints": [ 
     { 
      "message": "Not implemented in this context, try switching into or out of a web view (WARNING: The server did not provide any stacktrace information)\nCommand duration or timeout: 6 milliseconds\nBuild info: version: '2.39.0', revision: 'ff23eac', time: '2013-12-16 16:11:15'\nSystem info: host: 'testUSER-SIRs-MacBook-Pro.local', ip: '127.0.0.1', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.8.5', java.version: '1.6.0_65'\nSession ID: aced75a4-2bd9-4147-8346-1973371d2f97\nDriver info: com.infostretch.automation.ui.webdriver.QAFExtendedWebDriver\nCapabilities [{platform=MAC, app=/Users/testUSER/IAirwaysPG.app, javascriptEnabled=true, browserName=, desired={\"app\":\"/Users/testUSER/IAirwaysPG.app\",\"platformVersion\":\"7.1\",\"deviceName\":\"iPhone Simulator\",\"platformName\":\"iOS\",\"browserName\":\"\"}, locationContextEnabled=false, version=, platformVersion=7.1, databaseEnabled=false, cssSelectorsEnabled=true, platformName=ios, deviceName=iPhone Simulator, browser_name=, webStorageEnabled=false, warnings={}, takesScreenshot=true}]", 
      "type": "Fail", 
      "screenshot": "", 
      "subCheckPoints": [] 
     } 
     ] 
    } 
    ], 
    "errorTrace": "org.openqa.selenium.WebDriverException: Not implemented in this context, try switching into or out of a web view (WARNING: The server did not provide any stacktrace information)\nCommand duration or timeout: 6 milliseconds\nBuild info: version: '2.39.0', revision: 'ff23eac', time: '2013-12-16 16:11:15'\nSystem info: host: 'testUSER-SIRs-MacBook-Pro.local', ip: '127.0.0.1', os.name: 'Mac OS X', os.arch: 'x86_64', os.version: '10.8.5', java.version: '1.6.0_65'\nSession ID: aced75a4-2bd9-4147-8346-1973371d2f97\nDriver info: com.infostretch.automation.ui.webdriver.QAFExtendedWebDriver\nCapabilities [{platform=MAC, app=/Users/testUSER/IAirwaysPG.app, javascriptEnabled=true, browserName=, desired={\"app\":\"/Users/testUSER/IAirwaysPG.app\",\"platformVersion\":\"7.1\",\"deviceName\":\"iPhone Simulator\",\"platformName\":\"iOS\",\"browserName\":\"\"}, locationContextEnabled=false, version=, platformVersion=7.1, databaseEnabled=false, cssSelectorsEnabled=true, platformName=ios, deviceName=iPhone Simulator, browser_name=, webStorageEnabled=false, warnings={}, takesScreenshot=true}]\n\tat sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)\n\tat sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)\n\tat sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)\n\tat java.lang.reflect.Constructor.newInstance(Constructor.java:513)\n\tat org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:193)\n\tat org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145)\n\tat org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:554)\n\tat com.infostretch.automation.ui.webdriver.QAFExtendedWebDriver.execute(QAFExtendedWebDriver.java:199)\n\tat org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:569)\n\tat com.infostretch.automation.ui.webdriver.QAFExtendedWebDriver.execute(QAFExtendedWebDriver.java:188)\n\tat org.openqa.selenium.remote.RemoteWebDriver.getWindowHandle(RemoteWebDriver.java:444)\n\tat org.openqa.selenium.internal.seleniumemulation.Windows.<init>(Windows.java:38)\n\tat org.openqa.selenium.WebDriverCommandProcessor.setUpMethodMap(WebDriverCommandProcessor.java:190)\n\tat org.openqa.selenium.WebDriverCommandProcessor.<init>(WebDriverCommandProcessor.java:51)\n\tat com.infostretch.automation.ui.selenium.webdriver.QAFWebDriverCommandProcessor.<init>(QAFWebDriverCommandProcessor.java:53)\n\tat com.infostretch.automation.ui.UiDriverFactory.get(UiDriverFactory.java:74)\n\tat com.infostretch.automation.core.QAFTestBase.init(QAFTestBase.java:187)\n\tat com.infostretch.automation.core.QAFTestBase.getUiDriver(QAFTestBase.java:229)\n\tat com.infostretch.automation.ui.WebDriverTestBase.getDriver(WebDriverTestBase.java:40)\n\tat com.infostretch.automation.ui.webdriver.QAFExtendedWebElement.<init>(QAFExtendedWebElement.java:103)\n\tat com.infostretch.automation.ui.webdriver.QAFExtendedWebElement.<init>(QAFExtendedWebElement.java:114)\n\tat com.infostretch.automation.step.CommonStep.sendKeys_aroundBody8(CommonStep.java:75)\n\tat com.infostretch.automation.step.CommonStep$AjcClosure9.run(CommonStep.java:1)\n\tat org.aspectj.runtime.reflect.JoinPointImpl.proceed(JoinPointImpl.java:149)\n\tat com.infostretch.automation.step.JavaStepReporter$MockJavaStep.doExecute(JavaStepReporter.java:89)\n\tat com.infostretch.automation.step.BaseTestStep.execute(BaseTestStep.java:96)\n\tat com.infostretch.automation.step.JavaStep.baseExecute(JavaStep.java:89)\n\tat com.infostretch.automation.step.JavaStepReporter$MockJavaStep.execute(JavaStepReporter.java:104)\n\tat com.infostretch.automation.step.JavaStepReporter.javaTestStep(JavaStepReporter.java:70)\n\tat com.infostretch.automation.step.CommonStep.sendKeys(CommonStep.java:74)\n\tat main.tc.Login_TC1.login_with_common_step(Login_TC1.java:28)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)\n\tat java.lang.reflect.Method.invoke(Method.java:597)\n\tat org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)\n\tat org.testng.internal.Invoker.invokeMethod(Invoker.java:714)\n\tat org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)\n\tat org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)\n\tat org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)\n\tat org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)\n\tat org.testng.TestRunner.privateRun(TestRunner.java:767)\n\tat org.testng.TestRunner.run(TestRunner.java:617)\n\tat org.testng.SuiteRunner.runTest(SuiteRunner.java:334)\n\tat org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)\n\tat org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)\n\tat org.testng.SuiteRunner.run(SuiteRunner.java:240)\n\tat org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)\n\tat org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)\n\tat org.testng.TestNG.runSuitesSequentially(TestNG.java:1224)\n\tat org.testng.TestNG.runSuitesLocally(TestNG.java:1149)\n\tat org.testng.TestNG.run(TestNG.java:1057)\n\tat org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111)\n\tat org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204)\n\tat org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)\n" 
} 

Мой Java код. JsonLogParser.java. Игнорируйте основную функцию. Я упростил свой код здесь.

package com.test.parser; 

import java.io.FileReader; 
import com.google.gson.*; 

public class JsonLogParser { 
    String filePath = "C:\\<PATH_TO>\\sample.json"; 
    public static void parseJSON(String filePath){ 
     try { 
      // read the json file 
      FileReader reader = new FileReader(filePath); 
      JsonParser jsonParser = new JsonParser(); 

      JsonObject jsonGObject = (JsonObject) jsonParser.parse(reader); 
      String result = jsonGObject.getAsJsonArray("seleniumLog").get(0).getAsJsonObject().get("result").toString(); 
      String errorTrace; 
      if(result.contains("fail")){ 
       errorTrace = jsonGObject.get("errorTrace").toString(); 
       errorTrace.replaceAll("\n", System.getProperty("line.separator")); 
       String lines[] = errorTrace.split(System.getProperty("line.separator")); // did not work 
       // String lines[] = errorTrace.split("\n"); // did not work 
       // errorTrace.indexOf("\n", errorTrace.indexOf("\n") + 1); // did not work 
       String errorTraceCSV = lines[0]; //always returns the entire Stack Trace. I'm expecting only first line here.    
       System.out.println("errorTraceCSV: " + errorTraceCSV); 
      } 
     }catch (Exception e) { 
      System.out.println(e.toString()); 
     } 
    } 
} 

Выше программы не могут разбить элемент errorTrace на символ новой строки. Я хочу извлечь только первую строку errorTrace из всей трассировки стека. Я попробовал почти 3-4 различных решения, предложенных на SO. Мало кто из них я упомянул выше, и никто из них не работал.

IndexOf всегда возвращает -1. Функция split получает всю трассировку стека. Таким образом, он не раскололся.

Я думаю, что я делаю какую-то тупость здесь. Любая помощь приветствуется.

С уважением, Rumit

Answer 1

Try расщепление с помощью

split("[\\r\\n]+") 

Вместо тебя две строки

errorTrace.replaceAll("\n", System.getProperty("line.separator")); 
String lines[] = errorTrace.split(System.getProperty("line.separator")); // did not work 

Используйте это один

String lines[] = errorTrace.split("[\\r\\n]+"); 

Он должен работать час opefully.