Java實現(xiàn)導(dǎo)入導(dǎo)出Excel文件的方法(poi,jxl)
目前,比較常用的實現(xiàn)Java導(dǎo)入、導(dǎo)出Excel的技術(shù)有兩種Jakarta POI和Java Excel直接上代碼:
一,POI
POI是apache的項目,可對微軟的Word,Excel,Ppt進行操作,包括office2003和2007,Excl2003和2007。poi現(xiàn)在一直有更新。所以現(xiàn)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>
導(dǎo)出:
public class PoiCreateExcel { public static void main(String[] args) { // 創(chuàng)建表頭 String[] title = {'id','name','sex'}; //創(chuàng)建Excel工作薄 HSSFWorkbook workbook = new HSSFWorkbook(); //創(chuàng)建一個工作表sheet HSSFSheet sheet = workbook.createSheet(); //創(chuàng)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]); } // 追加數(shù)據(jù) for (int i = 1; i < 10; i++) {// 這里的int 起始是1 也就是第二行開始 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'); } // 創(chuàng)建一個文件 File file = new File('d:/poi.xls'); try { file.createNewFile(); // 將內(nèi)容存盤 FileOutputStream stream = FileUtils.openOutputStream(file); workbook.write(stream); stream.close(); } catch (Exception e) { e.printStackTrace(); } }}
導(dǎo)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 { // 創(chuàng)建Excel 讀取文件內(nèi)容 HSSFWorkbook workbook = new HSSFWorkbook(FileUtils.openInputStream(file)); /** * 第一種方式讀取Sheet頁 */// HSSFSheet sheet = workbook.getSheet('Sheet0'); /** * 第二種方式讀取Sheet頁 */ HSSFSheet sheet = workbook.getSheetAt(0); int firstRowNum = 0;// 起始行第0行 int lasrRowNum = sheet.getLastRowNum();// 一直讀到最后一行 for (int i = 0; i < lasrRowNum; i++) { HSSFRow row = sheet.getRow(i); // 獲取當前最后單元格列號 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 如果是其他類型 則需要修改 System.out.print(value + ' '); } System.out.println(); } } catch (Exception e) { e.printStackTrace(); } }}
xlsx:
pom:
<!-- poi高版本額外包 --><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>
導(dǎo)出:
public class PoiCreateExcel { public static void main(String[] args) { // 創(chuàng)建表頭 String[] title = {'id','name','sex'}; //創(chuàng)建Excel工作薄 XSSFWorkbook workbook = new XSSFWorkbook(); //創(chuàng)建一個工作表shheet Sheet sheet = workbook.createSheet(); //創(chuàng)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]); } // 追加數(shù)據(jù) for (int i = 1; i < 10; i++) {// 這里的int 起始是1 也就是第二行開始 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'); } // 創(chuàng)建一個文件 File file = new File('d:/poi.xlsx');// 這里可以修改成高版本的 try { file.createNewFile(); // 將內(nèi)容存盤 FileOutputStream stream = FileUtils.openOutputStream(file); workbook.write(stream); stream.close(); } catch (Exception e) { e.printStackTrace(); } }}
導(dǎo)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('文件不正確!'); } Workbook workbook = WorkbookFactory.create(is); FormulaEvaluator fe = workbook.getCreationHelper().createFormulaEvaluator(); //獲取第一張表 Sheet sheet = workbook.getSheetAt(0); if(sheet == null){ throw new IOException('傳入的excel的第一張表為空!'); } for(int rowNum = 0;rowNum <= sheet.getLastRowNum(); rowNum++){ Row row = sheet.getRow(rowNum); if(row != null){ //獲得當前行的開始列 int firstCellNum = row.getFirstCellNum(); //獲得當前行的列數(shù) int lastCellNum = row.getPhysicalNumberOfCells(); String result = ''; //循環(huán)當前行 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('文件不正確!'); } 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只能對Excel進行操作,屬于比較老的框架,它只支持到Excel 95-2000的版本。現(xiàn)在已經(jīng)停止更新和維護。
pom:
<!-- jxl --><dependency><groupId>net.sourceforge.jexcelapi</groupId><artifactId>jxl</artifactId><version>2.6.10</version></dependency>
導(dǎo)出:
public class JxlCreateExcel { public static void main(String[] args) { // 首先設(shè)置表格第一行 表格頭名稱 也就是列名 String [] title = {'id','name','sex'}; // 創(chuàng)建Excel文件 存入路徑 File file = new File('d:/jxl.xls'); try { file.createNewFile(); // 創(chuàng)建工作薄 WritableWorkbook workbook = Workbook.createWorkbook(file); // 創(chuàng)建sheet WritableSheet sheet = workbook.createSheet('sheet1',0); // 添加數(shù)據(jù) Label label = null; // 第一行設(shè)置列名 for (int i = 0; i < title.length; i++) { label = new Label(i,0,title[i]); sheet.addCell(label); } // 追加數(shù)據(jù) 從第二行開始 i從1開始 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); } // 寫入 并在最后關(guān)閉流 workbook.write(); workbook.close(); } catch (Exception e) { e.printStackTrace(); } }}
導(dǎo)入:
public class JxlReadExcel { public static void main(String[] args) { try { // 創(chuàng)建 Workbook Workbook workbook = Workbook.getWorkbook(new File('d:/jxl.xls')); // 獲取工作表sheet Sheet sheet = workbook.getSheet(0); // 獲取數(shù)據(jù) for (int i = 0; i < sheet.getRows(); i++) {// 獲取行 for (int j = 0; j < sheet.getColumns(); j++) {// 獲取列 Cell cell = sheet.getCell(j,i); System.out.print(cell.getContents() + ' ');// 得到單元格的內(nèi)容 } System.out.println(); } workbook.close(); } catch (Exception e) { e.printStackTrace(); } }}
到此,代碼可直接部署運行,希望可以幫助到你~
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