如何使用java apche在Excel中编写POI：显示java.io.IOException：streamclosures错误
嗨，我想写第三栏的结果，但它显示stramclosures错误。
package test; import org.openqa.selenium.By; import org.openqa.selenium.WebDriver; import org.openqa.selenium.firefox.FirefoxDriver; import org.openqa.selenium.support.ui.ExpectedConditions; import org.openqa.selenium.support.ui.WebDriverWait; import java.awt.AWTException; import java.awt.HeadlessException; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.Date; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.Row; public class Xl2 { public static void main( String[] args ) throws Exception{ String[][] data ; //HSSFCell cell = null; data = excelRead(); String expectedtitle; for (int i = 1; i < data.length; i++ ) { expectedtitle = login(data[i][0],data[i][1]); System.out.println("page title after login is" + expectedtitle ); if(expectedtitle.equalsIgnoreCase(":: IRCTC :: - Plan My Travel")){ System.out.println("PASS"); String status="PASS"; excelwrite(status); } else{ System.out.println("FAIL"); String status = "FAIL"; excelwrite(status); } } } public static String login(String username,String password) throws InterruptedException{ //Step 1 Open Firefox WebDriver driver = new FirefoxDriver(); //Step 2 Go to url driver.get("https://www.irctc.co.in/"); String actualtitle= driver.getTitle(); WebDriverWait wait = new WebDriverWait(driver,60); wait.until(ExpectedConditions.visibilityOfElementLocated(By.name("userName"))); Thread.sleep(3000); driver.findElement(By.name("userName")).sendKeys(username); driver.findElement(By.name("password")).sendKeys(password); driver.findElement(By.id("button")).click(); Thread.sleep(3000); String expectedtitle= driver.getTitle(); /*if (actualtitle.equals(expectedtitle)){ System.out.println("FAIL" ); }else{ System.out.println("PASS" ); }*/ driver.close(); return expectedtitle; } public static String[][] excelRead() throws Exception { File excel = new File("D:\\Work\\test2.xls"); FileInputStream fis = new FileInputStream(excel); HSSFWorkbook wb = new HSSFWorkbook(fis); HSSFSheet ws = wb.getSheet("Sheet1"); int rowNum = ws.getLastRowNum() + 1; int colNum = ws.getRow(0).getLastCellNum(); String[][] data = new String[rowNum][colNum]; for (int i = 0 ; i < rowNum ; i++) { HSSFRow row = ws.getRow(i); for (int j=0 ; j < colNum ; j++){ HSSFCell cell = row.getCell(j); String value = cellToString(cell); data[i][j] = value; // System.out.println("The value is" + value); } } return data; } public static void excelwrite(String status) throws Exception { try{ FileInputStream file = new FileInputStream(new File("D:\\Work\\test2.xls")); HSSFWorkbook workbook = new HSSFWorkbook(file); int LastRow = 0; HSSFWorkbook wb = new HSSFWorkbook(file); HSSFSheet sheet = wb.getSheetAt(0); LastRow = sheet.getLastRowNum(); LastRow = LastRow + 1; Row row = sheet.createRow(LastRow); Cell cell2 = row.createCell(2); cell2.setCellValue(status); file.close(); FileOutputStream outFile =new FileOutputStream(new File("D:\\Work\\test2.xls")); workbook.write(outFile); outFile.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (HeadlessException e) { e.printStackTrace(); } } public static String cellToString(HSSFCell cell) { int type; Object result ; type = cell.getCellType(); switch (type) { case 0 : result = cell.getNumericCellValue(); break; case 1 : result = cell.getStringCellValue(); break; default : throw new RuntimeException("There are no support for this type of cell"); } return result.toString(); } } 请帮助我。我的主要目的是从excel中提取值，并将结果（通过/失败）写入到它们各自的行中。我对于selenium和java很陌生。
嘿，我得到了我的问题的答案。希望对这个新的Java Excel领域的人有用。
package test; import org.openqa.selenium.By; import org.openqa.selenium.WebDriver; import org.openqa.selenium.firefox.FirefoxDriver; import org.openqa.selenium.support.ui.ExpectedConditions; import org.openqa.selenium.support.ui.WebDriverWait; import java.awt.AWTException; import java.awt.HeadlessException; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.Date; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.Row; public class Excelreadwrite { public static void main( String[] args ) throws Exception{ String[][] data ; data = excelRead(); String expectedtitle; for (int i = 1; i < data.length; i++ ) { int LastRow = i; expectedtitle = login(data[i][0],data[i][1]); System.out.println("page title after login is" + expectedtitle ); if(expectedtitle.equalsIgnoreCase(":: IRCTC :: - Plan My Travel")){ System.out.println("PASS"); String status="PASS"; excelwrite(status,LastRow); } else{ System.out.println("FAIL"); String status = "FAIL"; excelwrite(status,LastRow); } } } public static String login(String username,String password) throws InterruptedException{ //Step 1 Open Firefox WebDriver driver = new FirefoxDriver(); //Step 2 Go to url driver.get("https://www.irctc.co.in/"); String actualtitle= driver.getTitle(); WebDriverWait wait = new WebDriverWait(driver,60); wait.until(ExpectedConditions.visibilityOfElementLocated(By.name("userName"))); Thread.sleep(3000); driver.findElement(By.name("userName")).sendKeys(username); driver.findElement(By.name("password")).sendKeys(password); driver.findElement(By.id("button")).click(); Thread.sleep(3000); String expectedtitle= driver.getTitle(); driver.close(); return expectedtitle; } public static String[][] excelRead() throws Exception { File excel = new File("D:\\Work\\test2.xls"); FileInputStream fis = new FileInputStream(excel); HSSFWorkbook wb = new HSSFWorkbook(fis); HSSFSheet ws = wb.getSheet("Sheet1"); int rowNum = ws.getLastRowNum() + 1; int colNum = ws.getRow(0).getLastCellNum(); String[][] data = new String[rowNum][colNum]; for (int i = 0 ; i < rowNum ; i++) { HSSFRow row = ws.getRow(i); for (int j=0 ; j < colNum ; j++){ HSSFCell cell = row.getCell(j); String value = cellToString(cell); data[i][j] = value; // System.out.println("The value is" + value); } } return data; } public static void excelwrite(String status, int LastRow) throws Exception { try{ FileInputStream file = new FileInputStream(new File("D:\\Work\\test2.xls")); HSSFWorkbook workbook = new HSSFWorkbook(file); HSSFSheet sheet = workbook.getSheetAt(0); Row row = sheet.getRow(LastRow); Cell cell2 = row.createCell(2); cell2.setCellValue(status); System.out.println(status); file.close(); FileOutputStream outFile =new FileOutputStream(new File("D:\\Work\\test2.xls")); workbook.write(outFile); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (HeadlessException e) { e.printStackTrace(); } } public static String cellToString(HSSFCell cell) { int type; Object result ; type = cell.getCellType(); switch (type) { case 0 : result = cell.getNumericCellValue(); break; case 1 : result = cell.getStringCellValue(); break; default : throw new RuntimeException("There are no support for this type of cell"); } return result.toString(); } }
编辑：格式化的代码。
如果您调用workbook.write（）两次，也可能会出现此错误。