java实现导入导出excel文件 Java实现导入导出Excel文件的方法(poi,jxl)
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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:
<!-- poi高版本额外包 --> <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:
<!-- jxl --> <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(); } } }
到此,代码可直接部署运行,希望可以帮助到你~
总结
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