无法从Excel读取'java.lang.ClassCastException：org.apache.poi.hssf.usermodel.HSSFCell无法强制转换为java.lang.S

Posted 2021-04-16

我正在尝试自动化一个网站，我试图从Excel中读取数据并在文本框中一个接一个地输入数据。

我正在使用'org.apache.poi'版本3.12。但是，当我尝试从excel输入数据时，我得到“java.lang.ClassCastException：org.apache.poi.hssf.usermodel.HSSFCell无法转换为java.lang.String”错误。在google上搜索以下错误时，我发现我们需要使用'DataFormatter'来格式化Cell。即使在使用DataFormatter之后，我仍然会看到以下错误。

从excel读取的代码如下

public static ArrayList iterateCells(String sheetName) {
    // Array List to store the excel sheet data
    ArrayList excelData = new ArrayList();
    DataFormatter formatter = new DataFormatter();
    try {
        FileInputStream userDetailsFile = new FileInputStream("D:\userLoginDetails.xls");

        HSSFWorkbook wb = new HSSFWorkbook(userDetailsFile);

        //Retrieve the first sheet of the workbook.
        //HSSFSheet excelSheet = wb.getSheetAt(0);
        int index = wb.getSheetIndex(sheetName);
        Sheet sheet = wb.getSheetAt(index);

        // Iterate through the sheet rows and cells.
        // Store the retrieved data in an arrayList
        Iterator rows = sheet.rowIterator();
        while (rows.hasNext()) {
            HSSFRow row = (HSSFRow) rows.next();
            Iterator cells = row.cellIterator();

            while (cells.hasNext()) {
                HSSFCell cell = (HSSFCell) cells.next();
                DataFormatter df = new DataFormatter();
                df.formatCellValue(cell);
                excelData.add(cell);
            }
        }
    } catch(IOException ex) {
        ex.printStackTrace();
    }
    return excelData;
}

我将代码输入网页的代码如下。

@Test(dependsOnMethods="AddCardioExerciseForTheDay")
public void AddStrengthExerciseForTheDay() throws Exception {
    engineDriver.landingPageAfterLoggingIn.addExerciseAfterLoggingIn();
    List colData = new ArrayList();
    colData = wte.iterateCells("DataSheet");
    String exerciseType = (String) colData.get(1);

    engineDriver.exercisePage.selectStrengthExercise(exerciseType);
    engineDriver.exercisePage.goToAddFoodPage();
}

有人能指出我哪里出错了。谢谢！！

编辑：我收到以下行中的错误

String exerciseType = (String) colData.get(1);

堆栈跟踪：

java.lang.ClassCastException: org.apache.poi.hssf.usermodel.HSSFCell cannot be cast to java.lang.String
at com.myfitnesspal.tests.MfpExerciseLoggingTest.AddStrengthExerciseForTheDay(MfpExerciseLoggingTest.java:107)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:86)
at org.testng.internal.Invoker.invokeMethod(Invoker.java:643)
at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:820)
at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1128)
at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:129)
at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:112)
at org.testng.TestRunner.privateRun(TestRunner.java:782)
at org.testng.TestRunner.run(TestRunner.java:632)
at org.testng.SuiteRunner.runTest(SuiteRunner.java:366)
at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:361)
at org.testng.SuiteRunner.privateRun(SuiteRunner.java:319)
at org.testng.SuiteRunner.run(SuiteRunner.java:268)
at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
at org.testng.TestNG.runSuitesSequentially(TestNG.java:1244)
at org.testng.TestNG.runSuitesLocally(TestNG.java:1169)
at org.testng.TestNG.run(TestNG.java:1064)
at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:132)
at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:236)
at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:81)

答案

在单元格上使用getStringCellValue()将其内容作为String。

在你的情况下，我认为它应该是：

String exerciseType = colData.get(1).getStringCellValue();

见：apache poi cell documentation