Java实现导入导出Excel文件的方法（poi，jxl）_Java教程

目前，比较常用的实现Java导入、导出Excel的技术有两种Jakarta POI和Java Excel直接上代码：

一，POI

POI是apache的项目,可对微软的Word,Excel,Ppt进行操作,包括office2003和2007,Excl2003和2007。poi现在一直有更新。所以现在主流使用POI。

xls：

pom：

									<dependency>

									    <groupId>org.apache.poi</groupId>

									    <artifactId>poi-ooxml</artifactId>

									    <version>3.9</version>

									</dependency>

									<dependency>

									    <groupId>commons-io</groupId>

									    <artifactId>commons-io</artifactId>

									    <version>2.2</version>

									</dependency>

导出：

public class PoiCreateExcel {

public static void main(String[] args) {

  // 创建表头

  String[] title = {"id","name","sex"};

  //创建Excel工作薄

  HSSFWorkbook workbook = new HSSFWorkbook();

  //创建一个工作表sheet

  HSSFSheet sheet = workbook.createSheet();

  //创建第一行

  HSSFRow row = sheet.createRow(0);

  HSSFCell cell = null;

  // 插入第一行

  for (int i = 0; i < title.length; i++) {

   cell = row.createCell(i);

   cell.setCellValue(title[i]);

  }

  // 追加数据

  for (int i = 1; i < 10; i++) {// 这里的int 起始是1 也就是第二行开始

   HSSFRow nexTrow = sheet.createRow(i);

   HSSFCell cell2 = nexTrow.createCell(0);

   cell2.setCellValue("a"+i);

   cell2 = nexTrow.createCell(1);

   cell2.setCellValue("user");

   cell2 = nexTrow.createCell(2);

   cell2.setCellValue("男");

  }

  // 创建一个文件

  File file = new File("d:/poi.xls");

  try {

   file.createNewFile();

   // 将内容存盘

   FileOutputStream stream = FileUtils.openOutputStream(file);

   workbook.write(stream);

   stream.close();

  } catch (Exception e) {

   e.printStackTrace();

  }

}

}

导入：

public class PoiReadExcel {

public static void main(String[] args) {

  // 引入需要解析的文件

  File file = new File("d:/poi.xls");

  try {

   // 创建Excel 读取文件内容

   HSSFWorkbook workbook = new HSSFWorkbook(FileUtils.openInputStream(file));

   /**

    * 第一种方式读取Sheet页

    */

//   HSSFSheet sheet = workbook.getSheet("Sheet0");

   /**

    * 第二种方式读取Sheet页

    */

   HSSFSheet sheet = workbook.getSheetAt(0);

   int firstRowNum = 0;// 起始行第0行

   int lasrRowNum = sheet.getLastRowNum();// 一直读到最后一行

   for (int i = 0; i < lasrRowNum; i++) {

    HSSFRow row = sheet.getRow(i);

    // 获取当前最后单元格列号

    int lastCellNum = row.getLastCellNum();

    for (int j = 0; j < lastCellNum; j++) {

     HSSFCell cell = row.getCell(j);

     String value = cell.getStringCellValue();// 注意！如果Excel 里面的值是String 那么getStringCellValue 如果是其他类型则需要修改

     System.out.print(value + " ");

    }

    System.out.println();

   }

  } catch (Exception e) {

   e.printStackTrace();

  }

}

}

xlsx：

pom：

<dependency>

    <groupId>org.apache.poi</groupId>

    <artifactId>poi-examples</artifactId>

    <version>3.9</version>

</dependency>

<dependency>

    <groupId>org.apache.poi</groupId>

    <artifactId>poi-excelant</artifactId>

    <version>3.9</version>

</dependency>

<dependency>

    <groupId>org.apache.poi</groupId>

    <artifactId>poi-ooxml</artifactId>

    <version>3.9</version>

</dependency>

<dependency>

    <groupId>org.apache.poi</groupId>

    <artifactId>poi-ooxml-schemas</artifactId>

    <version>3.9</version>

</dependency>

<dependency>

    <groupId>org.apache.poi</groupId>

    <artifactId>poi-scratchpad</artifactId>

    <version>3.9</version>

</dependency>

导出：

public class PoiCreateExcel {

public static void main(String[] args) {

  // 创建表头

  String[] title = {"id","name","sex"};

  //创建Excel工作薄

  XSSFWorkbook workbook = new XSSFWorkbook();

  //创建一个工作表shheet

  Sheet sheet = workbook.createSheet();

  //创建第一行

  Row row = sheet.createRow(0);

  Cell cell = null;

  // 插入第一行

  for (int i = 0; i < title.length; i++) {

   cell = row.createCell(i);

   cell.setCellValue(title[i]);

  }

  // 追加数据

  for (int i = 1; i < 10; i++) {// 这里的int 起始是1 也就是第二行开始

   Row nexTrow = sheet.createRow(i);

   Cell cell2 = nexTrow.createCell(0);

   cell2.setCellValue("a"+i);

   cell2 = nexTrow.createCell(1);

   cell2.setCellValue("user");

   cell2 = nexTrow.createCell(2);

   cell2.setCellValue("男");

  }

  // 创建一个文件

  File file = new File("d:/poi.xlsx");// 这里可以修改成高版本的

  try {

   file.createNewFile();

   // 将内容存盘

   FileOutputStream stream = FileUtils.openOutputStream(file);

   workbook.write(stream);

   stream.close();

  } catch (Exception e) {

   e.printStackTrace();

  }

}

}

导入：

public class PoiReadExcel {

public List<Double> readExcels(InputStream is)throws Exception{

  List<Double> xlsxList = new ArrayList<Double>();

  try {

   if(is ==null){

    throw new IOException("文件不正确！");

   }

   Workbook workbook = WorkbookFactory.create(is);

   FormulaEvaluator fe = workbook.getCreationHelper().createFormulaEvaluator();

   //获取第一张表

   Sheet sheet = workbook.getSheetAt(0);

   if(sheet == null){

    throw new IOException("传入的excel的第一张表为空！");

   }

   for(int rowNum = 0;rowNum <= sheet.getLastRowNum(); rowNum++){

    Row row = sheet.getRow(rowNum);

    if(row != null){

     //获得当前行的开始列

     int firstCellNum = row.getFirstCellNum();

     //获得当前行的列数

     int lastCellNum = row.getPhysicalNumberOfCells();

     String result = "";

     //循环当前行

     for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){

      Cell cell = row.getCell(cellNum);

      double value = 0;

      String valueString = cell.getStringCellValue();

      if(null!=fe.evaluate(cell)){

       value = fe.evaluate(cell).getNumberValue();

      }

      //result = result + cellNum + ":"+value + "----";

      result = result + cellNum + ":"+valueString + "----";

     }

     System.out.println(result + " ");

    }

   }

   is.close();

  } catch (FileNotFoundException e) {

  throw new Exception("文件不正确!");

}

  return xlsxList;

}

public static void main(String[] args) throws Exception {

  InputStream is = new FileInputStream("d:/poi.xlsx");

  PoiReadExcel re = new PoiReadExcel();

  re.readExcels(is);

}

}

二，JXL

JXL只能对Excel进行操作,属于比较老的框架，它只支持到Excel 95-2000的版本。现在已经停止更新和维护。

pom：

<dependency>

    <groupId>net.sourceforge.jexcelapi</groupId>

    <artifactId>jxl</artifactId>

    <version>2.6.10</version>

</dependency>

导出：

public class JxlCreateExcel {

public static void main(String[] args) {

  // 首先设置表格第一行表格头名称也就是列名

  String [] title = {"id","name","sex"};

  // 创建Excel文件存入路径

  File file = new File("d:/jxl.xls");

  try {

   file.createNewFile();

   // 创建工作薄

   WritableWorkbook workbook = Workbook.createWorkbook(file);

   // 创建sheet

   WritableSheet sheet = workbook.createSheet("sheet1",0);

   // 添加数据

   Label label = null;

   // 第一行设置列名

   for (int i = 0; i < title.length; i++) {

    label = new Label(i,0,title[i]);

    sheet.addCell(label);

   }

   // 追加数据从第二行开始 i从1开始

   for (int i = 1; i < 9; i++) {

    label = new Label(0,i,"id:"+i);

    sheet.addCell(label);

    label = new Label(1,i,"user");

    sheet.addCell(label);

    label = new Label(2,i,"男");

    sheet.addCell(label);

   }

   // 写入并在最后关闭流

   workbook.write();

   workbook.close();

  } catch (Exception e) {

   e.printStackTrace();

  }

}

}

导入：

public class JxlReadExcel {

public static void main(String[] args) {

  try {

   // 创建 Workbook

   Workbook workbook = Workbook.getWorkbook(new File("d:/jxl.xls"));

   // 获取工作表sheet

   Sheet sheet = workbook.getSheet(0);

   // 获取数据

   for (int i = 0; i < sheet.getRows(); i++) {// 获取行

    for (int j = 0; j < sheet.getColumns(); j++) {// 获取列

     Cell cell = sheet.getCell(j,i);

     System.out.print(cell.getContents() + " ");// 得到单元格的内容

    }

    System.out.println();

   }

   workbook.close();

  } catch (Exception e) {

   e.printStackTrace();

  }

}

}