Excel匯出+解析通用工具類
阿新 • • 發佈：2019-02-20
參照原文：http://blog.csdn.net/houxuehan/article/details/50960259
maven配置：
<dependencies> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.10-FINAL</version> </dependency> <dependency><groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.10-FINAL</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId><version>1.2.44</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.2</version> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build>
測試model: student
import java.util.Date; /** *<p> *</p> * * @author lishw * @version $Id: Student.java, v 0.1 2017-12-28 18:09 lishw $$ */ public class Student { private String name; private int age; private Date birthday; private float height; private double weight; private boolean sex; public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } public float getHeight() { return height; } public void setHeight(float height) { this.height = height; } public double getWeight() { return weight; } public void setWeight(double weight) { this.weight = weight; } public boolean isSex() { return sex; } public void setSex(boolean sex) { this.sex = sex; } public void setAge(Integer age) { this.age = age; } /** * @see Object#toString() */ @Override public String toString() { StringBuilder builder = new StringBuilder(); builder.append("Student[name="); builder.append(name); builder.append(",age="); builder.append(age); builder.append(",birthday="); builder.append(birthday); builder.append(",height="); builder.append(height); builder.append(",weight="); builder.append(weight); builder.append(",sex="); builder.append(sex); builder.append(",super.toString()="); builder.append(super.toString()); builder.append("]"); return builder.toString(); } }工具類，及測試：
import com.alibaba.fastjson.JSONArray; import com.alibaba.fastjson.JSONObject; import org.apache.poi.hpsf.SummaryInformation; import org.apache.poi.hssf.usermodel.*; import org.apache.poi.ss.usermodel.*; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.xssf.streaming.SXSSFWorkbook; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import java.io.*; import java.math.BigDecimal; import java.text.SimpleDateFormat; import java.util.*; /** *<p> * excel解析匯出通用工具類 *</p> * * @author lishw * @version $Id: ExcelUtil.java, v 0.1 2017-12-28 18:02 lishw $$ */ public class ExcelUtil { public static String DEFAULT_DATE_PATTERN = "yyyy年MM月dd日";//預設日期格式 public static int DEFAULT_COLOUMN_WIDTH = 17; /** * 讀取excel,預設首行為標題行 * @param filepath 檔名稱 * @param startIndex 標題行數 * @param headMap 標題名稱和欄位對應 * @return 資料結果 * @throws Exception */ public static JSONArray readExcelWithTitle(String filepath, Integer startIndex, Map<String, String> headMap) throws Exception { String fileType = filepath.substring(filepath.lastIndexOf(".") + 1, filepath.length()); InputStream is = null; Workbook wb = null; JSONArray array = new JSONArray(); try { is = new FileInputStream(filepath); if (fileType.equals("xls")) { wb = new HSSFWorkbook(is); } else if (fileType.equals("xlsx")) { wb = new XSSFWorkbook(is); } else { throw new Exception("讀取的不是excel檔案"); } int sheetSize = wb.getNumberOfSheets(); for (int i = 0; i < sheetSize; i++) {//遍歷sheet頁 Sheet sheet = wb.getSheetAt(i); List<String> titles = new ArrayList<String>();//放置所有的標題 int rowSize = sheet.getLastRowNum() + 1; for (int j = 0; j < rowSize; j++) {//遍歷行 Row row = sheet.getRow(j); if (row == null || j < ((startIndex==null ||startIndex<0)?1:startIndex)) {//略過空行 continue; } int cellSize = row.getLastCellNum();//行中有多少個單元格，也就是有多少列 if (j == startIndex) {//標題行 for (int k = 0; k < cellSize; k++) { Cell cell = row.getCell(k); titles.add(cell.toString()); } } else {//其他行是資料行 JSONObject obj = new JSONObject(); for (int k = 0; k < titles.size(); k++) { Cell cell = row.getCell(k); String key = titles.get(k); String cellValue = null; if (cell != null) { // 以下是判斷資料的型別 switch (cell.getCellType()) { case HSSFCell.CELL_TYPE_NUMERIC: // 數字 cellValue = cell.getNumericCellValue() + ""; break; case HSSFCell.CELL_TYPE_STRING: // 字串 cellValue = cell.getStringCellValue(); break; case HSSFCell.CELL_TYPE_BOOLEAN: // Boolean cellValue = cell.getBooleanCellValue() + ""; break; case HSSFCell.CELL_TYPE_FORMULA: // 公式 cellValue = cell.getCellFormula() + ""; break; case HSSFCell.CELL_TYPE_BLANK: // 空值 cellValue = ""; break; case HSSFCell.CELL_TYPE_ERROR: // 故障 cellValue = "非法字元"; break; default: cellValue = "未知型別"; break; } } obj.put(headMap.get(key), cellValue); array.add(obj); } } } } return array; } catch (FileNotFoundException e) { throw e; } finally { if (is != null) { is.close(); } } } /** * 匯出Excel 97(.xls)格式 ，少量資料 * @param title 標題行 * @param headMap 屬性-列名 * @param jsonArray 資料集 * @param datePattern 日期格式，null則用預設日期格式 * @param colWidth 列寬 預設 至少17個位元組 * @param out 輸出流 */ public static void exportExcel(String title, Map<String, String> headMap, JSONArray jsonArray, String datePattern, int colWidth, OutputStream out) { if (datePattern == null) datePattern = DEFAULT_DATE_PATTERN; // 宣告一個工作薄 HSSFWorkbook workbook = new HSSFWorkbook(); workbook.createInformationProperties(); workbook.getDocumentSummaryInformation().setCompany("*****公司"); SummaryInformation si = workbook.getSummaryInformation(); si.setAuthor("lsw"); //填加xls檔案作者資訊 si.setApplicationName("匯出程式"); //填加xls檔案建立程式資訊 si.setLastAuthor("lsw"); //填加xls檔案最後儲存者資訊 si.setComments("lsw so cool!"); //填加xls檔案作者資訊 si.setTitle("POI匯出Excel"); //填加xls檔案標題資訊 si.setSubject("POI匯出Excel");//填加檔案主題資訊 si.setCreateDateTime(new Date()); //設定單元格樣式 HSSFCellStyle titleStyle = getHssfTitleStyle(workbook); HSSFCellStyle headerStyle = getHssfHeaderStyle(workbook); HSSFCellStyle cellStyle = getHssfCellStyle(workbook, headerStyle); // 生成一個(帶標題)表格 HSSFSheet sheet = workbook.createSheet(); // 宣告一個畫圖的頂級管理器 HSSFPatriarch patriarch = sheet.createDrawingPatriarch(); // 定義註釋的大小和位置,詳見文件 HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short) 4, 2, (short) 6, 5)); // 設定註釋內容 comment.setString(new HSSFRichTextString("可以在POI中添加註釋！")); // 設定註釋作者，當滑鼠移動到單元格上是可以在狀態列中看到該內容. comment.setAuthor("lsw"); //設定列寬 int minBytes = colWidth < DEFAULT_COLOUMN_WIDTH ? DEFAULT_COLOUMN_WIDTH : colWidth;//至少位元組數 int[] arrColWidth = new int[headMap.size()]; // 產生表格標題行,以及設定列寬 String[] properties = new String[headMap.size()]; String[] headers = new String[headMap.size()]; int ii = 0; for (Iterator<String> iter = headMap.keySet().iterator(); iter.hasNext(); ) { String fieldName = iter.next(); properties[ii] = fieldName; headers[ii] = fieldName; int bytes = fieldName.getBytes().length; arrColWidth[ii] = bytes < minBytes ? minBytes : bytes; sheet.setColumnWidth(ii, arrColWidth[ii] * 256); ii++; } // 遍歷集合資料，產生資料行 int rowIndex = 0; for (Object obj : jsonArray) { if (rowIndex == 65535 || rowIndex == 0) { if (rowIndex != 0) sheet = workbook.createSheet();//如果資料超過了，則在第二頁顯示 HSSFRow titleRow = sheet.createRow(0);//表頭 rowIndex=0 titleRow.createCell(0).setCellValue(title); titleRow.getCell(0).setCellStyle(titleStyle); sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, headMap.size() - 1)); HSSFRow headerRow = sheet.createRow(1); //列頭 rowIndex =1 for (int i = 0; i < headers.length; i++) { headerRow.createCell(i).setCellValue(headers[i]); headerRow.getCell(i).setCellStyle(headerStyle); } rowIndex = 2;//資料內容從 rowIndex=2開始 } JSONObject jo = (JSONObject) JSONObject.toJSON(obj); HSSFRow dataRow = sheet.createRow(rowIndex); for (int i = 0; i < properties.length; i++) { HSSFCell newCell = dataRow.createCell(i); Object o = jo.get(properties[i]); String cellValue = ""; if (o == null) cellValue = ""; else if (o instanceof Date) cellValue = new SimpleDateFormat(datePattern).format(o); else if (o instanceof Float || o instanceof Double) cellValue = new BigDecimal(o.toString()).setScale(2, BigDecimal.ROUND_HALF_UP).toString(); else cellValue = o.toString(); newCell.setCellValue(cellValue); newCell.setCellStyle(cellStyle); } rowIndex++; } // 自動調整寬度 for (int i = 0; i < headers.length; i++) { sheet.autoSizeColumn(i); } try { workbook.write(out); } catch (IOException e) { e.printStackTrace(); } } private static HSSFCellStyle getHssfCellStyle(HSSFWorkbook workbook, HSSFCellStyle headerStyle) { // 單元格樣式 HSSFCellStyle cellStyle = workbook.createCellStyle(); headerStyle.setFillForegroundColor((short) 11);// 設定背景色 headerStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN); cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN); cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN); cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); HSSFFont cellFont = workbook.createFont(); cellFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL); cellStyle.setFont(cellFont); return cellStyle; } private static HSSFCellStyle getHssfHeaderStyle(HSSFWorkbook workbook) { // 列頭樣式 HSSFCellStyle headerStyle = workbook.createCellStyle(); headerStyle.setFillForegroundColor((short) 11);// 設定背景色 headerStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); headerStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); headerStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN); headerStyle.setBorderRight(HSSFCellStyle.BORDER_THIN); headerStyle.setBorderTop(HSSFCellStyle.BORDER_THIN); headerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); HSSFFont headerFont = workbook.createFont(); headerFont.setFontHeightInPoints((short) 12); headerFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); headerStyle.setFont(headerFont); return headerStyle; } private static HSSFCellStyle getHssfTitleStyle(HSSFWorkbook workbook) { //表頭樣式 HSSFCellStyle titleStyle = workbook.createCellStyle(); titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); HSSFFont titleFont = workbook.createFont(); titleFont.setFontHeightInPoints((short) 20); titleFont.setBoldweight((short) 700); titleStyle.setFont(titleFont); return titleStyle; } /** * 匯出Excel 2007 OOXML (.xlsx)格式 * @param title 標題行 * @param headMap 屬性-列頭 * @param jsonArray 資料集 * @param datePattern 日期格式，傳null值則預設 年月日 * @param colWidth 列寬 預設 至少17個位元組 * @param out 輸出流 */ public static void exportExcelX(String title, Map<String, String> headMap, JSONArray jsonArray, String datePattern, int colWidth, OutputStream out) { if (datePattern == null) datePattern = DEFAULT_DATE_PATTERN; // 宣告一個工作薄 SXSSFWorkbook workbook = new SXSSFWorkbook(1000);//快取 workbook.setCompressTempFiles(true); //定義單元格樣式 CellStyle titleStyle = getTitleStyle(workbook); CellStyle headerStyle = getHeaderStyle(workbook); CellStyle cellStyle = getCellStyle(workbook); // 生成一個(帶標題)表格 Sheet sheet = workbook.createSheet(); //設定列寬 int minBytes = colWidth < DEFAULT_COLOUMN_WIDTH ? DEFAULT_COLOUMN_WIDTH : colWidth;//至少位元組數 int[] arrColWidth = new int[headMap.size()]; // 產生表格標題行,以及設定列寬 String[] properties = new String[headMap.size()]; String[] headers = new String[headMap.size()]; int ii = 0; for (Iterator<String> iter = headMap.keySet().iterator(); iter.hasNext(); ) { String fieldName = iter.next(); properties[ii] = fieldName; headers[ii] = headMap.get(fieldName); int bytes = fieldName.getBytes().length; arrColWidth[ii] = bytes < minBytes ? minBytes : bytes; sheet.setColumnWidth(ii, arrColWidth[ii] * 256); ii++; } // 遍歷集合資料，產生資料行 int rowIndex = 0; for (Object obj : jsonArray) { if (rowIndex == 65535 || rowIndex == 0) { if (rowIndex != 0) sheet = workbook.createSheet();//如果資料超過了，則在第二頁顯示 Row titleRow = sheet.createRow(0);//表頭 rowIndex=0 titleRow.createCell(0).setCellValue(title); titleRow.getCell(0).setCellStyle(titleStyle); sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, headMap.size() - 1)); Row headerRow = sheet.createRow(1); //列頭 rowIndex =1 for (int i = 0; i < headers.length; i++) { headerRow.createCell(i).setCellValue(headers[i]); headerRow.getCell(i).setCellStyle(headerStyle); } rowIndex = 2;//資料內容從 rowIndex=2開始 } JSONObject jo = (JSONObject) JSONObject.toJSON(obj); Row dataRow = sheet.createRow(rowIndex); for (int i = 0; i < properties.length; i++) { Cell newCell = dataRow.createCell(i); Object o = jo.get(properties[i]); String cellValue = ""; if (o == null) cellValue = ""; else if (o instanceof Date) cellValue = new SimpleDateFormat(datePattern).format(o); else if (o instanceof Float || o instanceof Double) cellValue = new BigDecimal(o.toString()).setScale(2, BigDecimal.ROUND_HALF_UP).toString(); else cellValue = o.toString(); newCell.setCellValue(cellValue); newCell.setCellStyle(cellStyle); } rowIndex++; } // 自動調整寬度 for (int i = 0; i < headers.length; i++) { sheet.autoSizeColumn(i); } try { workbook.write(out); // workbook.close(); workbook.dispose(); } catch (IOException e) { e.printStackTrace(); } } private static CellStyle getCellStyle(SXSSFWorkbook workbook) { // 單元格樣式 CellStyle cellStyle = workbook.createCellStyle(); // cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN); cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN); cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN); cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); Font cellFont = workbook.createFont(); cellFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL); cellStyle.setFont(cellFont); return cellStyle; } private static CellStyle getHeaderStyle(SXSSFWorkbook workbook) { // 列頭樣式 CellStyle headerStyle = workbook.createCellStyle(); headerStyle.setFillForegroundColor((short) 11);// 設定背景色 headerStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); headerStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); headerStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN); headerStyle.setBorderRight(HSSFCellStyle.BORDER_THIN); headerStyle.setBorderTop(HSSFCellStyle.BORDER_THIN); headerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); Font headerFont = workbook.createFont(); headerFont.setFontHeightInPoints((short) 12); headerFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); headerStyle.setFont(headerFont); return headerStyle; } private static CellStyle getTitleStyle(SXSSFWorkbook workbook) { //表頭樣式 CellStyle titleStyle = workbook.createCellStyle(); titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); Font titleFont = workbook.createFont(); titleFont.setFontHeightInPoints((short) 20); titleFont.setBoldweight((short) 700); titleStyle.setFont(titleFont); return titleStyle; } public static void main(String[] args) throws IOException { //測試匯出 int count = 140; JSONArray ja = new JSONArray(); for (int i = 0; i < 140; i++) { Student s = new Student(); s.setName("POI" + i); s.setAge(i); s.setBirthday(new Date()); s.setHeight(i); s.setWeight(i); s.setSex(i / 2 == 0 ? false : true); ja.add(s); } Map<String, String> headMap = new LinkedHashMap<String, String>(); headMap.put("name", "姓名"); headMap.put("age", "年齡"); headMap.put("birthday", "生日"); headMap.put("height", "身高"); headMap.put("weight", "體重"); headMap.put("sex", "性別"); String title = "測試"; //匯出xls String dist_xlsPath = "C:\\Users\\Lishw\\Desktop\\匯出測試.xls"; OutputStream outXls = new FileOutputStream(dist_xlsPath); System.out.println("正在匯出xls...."); Date d = new Date(); ExcelUtil.exportExcel(title, headMap, ja, null, 0, outXls); System.out.println("共" + count + "條資料,執行" + (new Date().getTime() - d.getTime()) + "ms"); outXls.close(); //匯出xlsx String dist_xlsXPath = "C:\\Users\\Lishw\\Desktop\\匯出測試.xlsx"; OutputStream outXlsX = new FileOutputStream(dist_xlsXPath); System.out.println("正在匯出xlsx...."); Date d2 = new Date(); ExcelUtil.exportExcelX(title, headMap, ja, null, 0, outXlsX); System.out.println("共" + count + "條資料,執行" + (new Date().getTime() - d2.getTime()) + "ms"); outXlsX.close(); //測試讀取excel // String dist_xlsPath = "C:\\Users\\Lishw\\Desktop\\匯出測試.xlsx"; // Map<String, String> headMap = new LinkedHashMap<String, String>(); // headMap.put("姓名", "name"); // headMap.put("年齡", "age"); // headMap.put("生日", "birthday"); // headMap.put("身高", "height"); // headMap.put("體重", "weight"); // headMap.put("性別", "sex"); // JSONArray array = readExcelWithTitle(dist_xlsPath,1,headMap); // List<Student> list= JSON.parseArray(JSON.toJSONString(array),Student.class); // list.forEach(l->System.out.println(l.toString())); } }如有問題，歡迎大家指正