1、jar包：poi-3.14-20160307.jar、poi-ooxml-3.14-20160307.jar
2、導入（本例實現瞭解析excel生成List）：
@Override
public Map<String, Object> parseExcel(String fileName) {
// 1.準備返回的變量
Map<String, Object> resultMap = new HashMap<String, Object>();
String message = "success";
List<Stone> stones = new ArrayList<Stone>();
boolean isE2007 = false; // 判斷是否是excel2007格式
if (fileName.endsWith("xlsx")) {
isE2007 = true;
}
SimpleDateFormat fmt = new SimpleDateFormat("yyyy-MM-dd");
// 2.準備workbook
// 同時支持Excel 2003、2007
File excelFile = new File(fileName); // 創建文件對象
Workbook workbook = null;
// 根據文件格式(2003或者2007)來初始化
try {
FileInputStream is = new FileInputStream(excelFile); // 文件流
if (isE2007) {
workbook = new XSSFWorkbook(is);
} else {
workbook = new HSSFWorkbook(is);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
// 3.遍歷集合，組裝結果
int sheetCount = workbook.getNumberOfSheets(); // Sheet的數量
// 遍歷每個Sheet
for (int s = 0; s < sheetCount; s++) {
Sheet sheet = workbook.getSheetAt(s);
int rowCount = sheet.getPhysicalNumberOfRows(); // 獲取總行數
// 遍歷每一行
for (int r = 1; r < rowCount; r++) {
Stone stone = new Stone();
Row row = sheet.getRow(r);
int cellCount = row.getPhysicalNumberOfCells(); // 獲取總列數
// 遍歷每一列
for (int c = 0; c < cellCount; c++) {
Cell cell = row.getCell(c);
int cellType = cell.getCellType();
String cellStringValue = null;
switch (cellType) {
case Cell.CELL_TYPE_STRING: // 文本
cellStringValue = cell.getStringCellValue();
break;
case Cell.CELL_TYPE_NUMERIC: // 數字、日期
if (DateUtil.isCellDateFormatted(cell)) {
cellStringValue = fmt.format(cell.getDateCellValue()); // 日期型
} else {
cellStringValue = String.valueOf(cell.getNumericCellValue()); // 數字
if (cellStringValue.contains("E")) {
cellStringValue = String.valueOf(new Double(cell.getNumericCellValue()).longValue()); // 數字
}
}
break;
case Cell.CELL_TYPE_BOOLEAN: // 布爾型
cellStringValue = String.valueOf(cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_BLANK: // 空白
cellStringValue = cell.getStringCellValue();
break;
case Cell.CELL_TYPE_ERROR: // 錯誤
cellStringValue = "錯誤";
break;
case Cell.CELL_TYPE_FORMULA: // 公式
cellStringValue = "錯誤";
break;
default:
cellStringValue = "錯誤";
}
if (cellStringValue.equals("錯誤")) {
message = "解析Excel時發生錯誤，第[" + (s + 1) + "]sheet，第[" + (row.getRowNum() + 1) + "]行，第[" + (c + 1)
+ "]列解析錯誤";
resultMap.put("message", message);
return resultMap;
}
cellStringValue = cellStringValue.trim();
switch (c) {
case ConstantsUtil.STONE_EXCEL_COLUMN_STONEID:
try {
new Long(cellStringValue);
} catch (NumberFormatException e) {
message = "解析Excel時發生錯誤，第[" + (s + 1) + "]sheet，第[" + (row.getRowNum() + 1) + "]行，第["
+ (c + 1) + "]列值類型轉換異常";
resultMap.put("message", message);
return resultMap;
}
stone.setStoneId(new Long(cellStringValue));
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_SHAPE:
stone.setShape(cellStringValue);
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_CARAT:
try {
new Double(cellStringValue);
} catch (NumberFormatException e) {
message = "解析Excel時發生錯誤，第[" + (s + 1) + "]sheet，第[" + (row.getRowNum() + 1) + "]行，第["
+ (c + 1) + "]列值類型轉換異常";
resultMap.put("message", message);
return resultMap;
}
stone.setCarat(new Double(cellStringValue));
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_COLOUR:
stone.setColour(cellStringValue);
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_CLARITY:
stone.setClarity(cellStringValue);
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_CUT:
stone.setCut(cellStringValue);
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_POLISH:
stone.setPolish(cellStringValue);
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_SYM:
stone.setSym(cellStringValue);
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_FLUOR:
stone.setFluor(cellStringValue);
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_DIAMETER:
try {
new Double(cellStringValue);
} catch (NumberFormatException e) {
message = "解析Excel時發生錯誤，第[" + (s + 1) + "]sheet，第[" + (row.getRowNum() + 1) + "]行，第["
+ (c + 1) + "]列值類型轉換異常";
resultMap.put("message", message);
return resultMap;
}
stone.setDiameter(new Double(cellStringValue));
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_PLENGTH:
try {
new Double(cellStringValue);
} catch (NumberFormatException e) {
message = "解析Excel時發生錯誤，第[" + (s + 1) + "]sheet，第[" + (row.getRowNum() + 1) + "]行，第["
+ (c + 1) + "]列值類型轉換異常";
resultMap.put("message", message);
return resultMap;
}
stone.setpLength(new Double(cellStringValue));
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_PWEIGHT:
try {
new Double(cellStringValue);
} catch (NumberFormatException e) {
message = "解析Excel時發生錯誤，第[" + (s + 1) + "]sheet，第[" + (row.getRowNum() + 1) + "]行，第["
+ (c + 1) + "]列值類型轉換異常";
resultMap.put("message", message);
return resultMap;
}
stone.setpWeight(new Double(cellStringValue));
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_PDEPTH:
try {
new Double(cellStringValue);
} catch (NumberFormatException e) {
message = "解析Excel時發生錯誤，第[" + (s + 1) + "]sheet，第[" + (row.getRowNum() + 1) + "]行，第["
+ (c + 1) + "]列值類型轉換異常";
resultMap.put("message", message);
return resultMap;
}
stone.setpDepth(new Double(cellStringValue));
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_PDEPTHPER:
try {
new Double(cellStringValue);
} catch (NumberFormatException e) {
message = "解析Excel時發生錯誤，第[" + (s + 1) + "]sheet，第[" + (row.getRowNum() + 1) + "]行，第["
+ (c + 1) + "]列值類型轉換異常";
resultMap.put("message", message);
return resultMap;
}
stone.setpDepthPer(new Double(cellStringValue));
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_PTABLE:
try {
new Double(cellStringValue);
} catch (NumberFormatException e) {
message = "解析Excel時發生錯誤，第[" + (s + 1) + "]sheet，第[" + (row.getRowNum() + 1) + "]行，第["
+ (c + 1) + "]列值類型轉換異常";
resultMap.put("message", message);
return resultMap;
}
stone.setpTable(new Double(cellStringValue));
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_LAB:
stone.setLab(cellStringValue);
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_CERTIID:
stone.setCertiId(cellStringValue);
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_STOCKIN:
Integer stockIn = 0;
if ("是".equals(cellStringValue)) {
stockIn = 1;
}
stone.setStockIn(stockIn);
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_STOCKCITY:
stone.setStockCity(cellStringValue);
break;
case ConstantsUtil.STONE_EXCEL_COLUMN_SINGLEPRICE:
try {
new BigDecimal(cellStringValue);
} catch (NumberFormatException e) {
message = "解析Excel時發生錯誤，第[" + (s + 1) + "]sheet，第[" + (row.getRowNum() + 1) + "]行，第["
+ (c + 1) + "]列值類型轉換異常";
resultMap.put("message", message);
return resultMap;
}
stone.setSinglePrice(new BigDecimal(cellStringValue));
break;
default:
message = "解析Excel時發生錯誤，第[" + (row.getRowNum() + 1) + "]行，第[" + (c + 1) + "]列不應該有值";
resultMap.put("message", message);
return resultMap;
}
}
stone.setIsOnSale(false);
stone.setIsDelete(false);
stones.add(stone);
}
}
resultMap.put("message", message);
resultMap.put("stones", stones);
return resultMap;
}3、導出
/*
* 調用寫入Excel的方法
*/
public static void doExpotToExcel(List<Map> params) throws IOException {
//System.out.println("params===:"+params);
writeXlsx("D:/測試寫入XLSX.xls",params);
}
public static void main(String[] args) throws IOException {
writeXlsx("D:/測試寫入XLSX.xls", null);
}
/*
* 將數據寫入Excel
*/
private static void writeXlsx(String fileName, List<Map> params) throws IOException {
// 創建
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet();
// 創建單元格樣式
HSSFCellStyle titleCellStyle = wb.createCellStyle();
// 指定單元格居中對齊
titleCellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
titleCellStyle.setWrapText(true);//設置自動換行
HSSFRow headerRow = sheet.createRow(0);
HSSFCell headerCell = null;
HSSFFont titleFont = wb.createFont();
titleFont.setFontHeightInPoints((short) 14);
titleFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
titleCellStyle.setFont(titleFont);
String[] titles = { "序號", "名稱","型號規格","單位","數量","單價","金額","備註"};
for (int c = 0; c < titles.length; c++) {
headerCell = headerRow.createCell(c);
headerCell.setCellStyle(titleCellStyle);
headerCell.setCellValue(titles[c]);
if(c==0){
sheet.setColumnWidth(c, (13 * 160));
}else if(c==1){
sheet.setColumnWidth(c, (50 * 160));
}else if(c==2){
sheet.setColumnWidth(c, (50 * 160));
}else if(c==7){
sheet.setColumnWidth(c, (40 * 160));
}else{
sheet.setColumnWidth(c, (13 * 160));
}
}
HSSFCell bodyCell = null;
// 創建單元格樣式
HSSFCellStyle cellStyle = wb.createCellStyle(); 一、設置背景色:
cellStyle.setFillForegroundColor((short) 13);// 設置背景色
cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
具體顏色可以參照：http://blog.csdn.NET/qq_27937043/article/details/72779442
二、設置邊框: cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下邊框 cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左邊框 cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);//上邊框
cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);//右邊框
三、設置居中: cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 水平居中 cellStyle.setAlignment(HSSFCellStyle.VERTICAL_CENTER);//垂直居中 cellStyle.setAlignment(HSSFCellStyle.VERTICAL_BOTTOM);//垂直底部 cellStyle.setAlignment(HSSFCellStyle.VERTICAL_TOP);//垂直頂部 四、設置字體: HSSFFont font = wb.createFont(); font.setFontName("黑體"); font.setFontHeightInPoints((short) 16);//設置字體大小
font2.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//粗體顯示
cellStyle.setFont(font);//選擇創建的字體格式
五、設置列寬: sheet.setColumnWidth(0, 3766);
//第一個參數代表列id(從0開始),第2個參數代表寬度值 參考 ："2017-06-01"的寬度爲2500
六、設置自動換行:
cellStyle.setWrapText(true);//設置自動換行
七、合併單元格: 方法1. 此方法在POI3.8中已經被廢棄，建議使用方法2 Region region1 = new Region(0, (short) 0, 0, (short) 6);//參數1：行號 參數2：起始列號 參數3：行號 參數4：終止列號 方法2 CellRangeAddress region1 = new CellRangeAddress(rowNumber, rowNumber, (short) 0, (short) 11); //參數1：起始行 參數2：終止行 參數3：起始列 參數4：終止列 但應注意兩個構造方法的參數不是一樣的，具體使用哪個取決於POI的不同版本。 sheet.addMergedRegion(region1); // 指定單元格居中對齊，邊框爲細 cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); //設置水平居中 cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//設置垂直居中 cellStyle.setWrapText(true);//設置自動換行 HSSFFont bodyFont = wb.createFont(); bodyFont.setFontHeightInPoints((short) 11); cellStyle.setFont(bodyFont); //額外的列樣式 HSSFCellStyle cellStyleTemp = wb.createCellStyle(); cellStyleTemp.setAlignment(HSSFCellStyle.ALIGN_CENTER); //設置水平居中 cellStyleTemp.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);//設置垂直居中 HSSFFont tempFont = wb.createFont(); tempFont.setFontHeightInPoints((short) 13); tempFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); cellStyleTemp.setFont(tempFont); for (int r = 0; r < params.size(); r++) { HSSFRow row = sheet.createRow(r + 1); int c = 0; bodyCell = row.createCell(1); bodyCell.setCellStyle(cellStyleTemp); bodyCell.setCellValue(params.get(r).get("product_name").toString()); bodyCell = row.createCell(c++); bodyCell.setCellStyle(cellStyle); bodyCell.setCellValue(params.get(r).get("count").toString()); if(params.get(r).get("product_type").toString().equals("")){ bodyCell = row.createCell(c++); bodyCell.setCellStyle(cellStyleTemp); bodyCell.setCellValue(params.get(r).get("product_name").toString()); }else{ bodyCell = row.createCell(c++); bodyCell.setCellStyle(cellStyle); bodyCell.setCellValue(params.get(r).get("product_name").toString()); } bodyCell = row.createCell(c++); bodyCell.setCellStyle(cellStyle); bodyCell.setCellValue(params.get(r).get("product_type").toString()); bodyCell = row.createCell(c++); bodyCell.setCellStyle(cellStyle); bodyCell.setCellValue(params.get(r).get("product_unit").toString()); bodyCell = row.createCell(c++); bodyCell.setCellStyle(cellStyle); bodyCell.setCellValue(params.get(r).get("product_count").toString()); bodyCell = row.createCell(c++); bodyCell.setCellStyle(cellStyle); bodyCell.setCellValue(params.get(r).get("product_unit_price").toString()); bodyCell = row.createCell(c++); bodyCell.setCellStyle(cellStyle); bodyCell.setCellValue(params.get(r).get("product_price").toString()); bodyCell = row.createCell(c++); bodyCell.setCellStyle(cellStyle); bodyCell.setCellValue(params.get(r).get("product_remark").toString()); } FileOutputStream fileOut = new FileOutputStream(fileName); wb.write(fileOut); fileOut.close(); System.out.println("Done"); } }