/**
* 合并单元格 测试
* @param title sheet页名称
* @param onlyKeys 每条数据独一数据表示
* @param head 表头
* @param rowList 主题数据
* @param subDatas 子数据 map 的key 就属于 onlyKeys中的值
* @return
* @throws Exception
*/
public static HSSFWorkbook warpSingleWorkbook2(String title, List<String> onlyKeys, List<String> head,
List<List<Object>> rowList, Map<String, List<List<Object>>> subDatas) throws Exception {
String filename = title;
if (!PlatformUtils.hasText(title)) {
filename = new SimpleDateFormat("yyMMddHHmmss").format(new Date());
}
if (rowList == null || rowList.isEmpty()) {
throw new NullPointerException("the row list is null");
}
// 如果要设置背景色 最好用 XSSFWorkbook
HSSFWorkbook book = new HSSFWorkbook();
// 创建表
HSSFSheet sheet = book.createSheet(filename);
// 设置单元格默认宽度为15个字符
sheet.setDefaultColumnWidth(20);
// 设置表格样式
HSSFCellStyle style = book.createCellStyle();
// 检测表头数据（表头不允许数据为空）
for (Object key : head) {
if (!PlatformUtils.hasText(key.toString())) {
book.close();
throw new NullPointerException("there is a blank exist head row");
}
}
// 生成表头
HSSFRow headRow = sheet.createRow(0);
for (int i = 0; i < head.size(); i++) {
HSSFCellStyle headStyle = book.createCellStyle();
buildStyle(headStyle, book);
setExcelValue(headRow.createCell(i), head.get(i), headStyle);
}
Iterator<List<Object>> iterator = rowList.iterator();
int rowIndex = 1;
int keyIndex = 0;
int commonTotalSize = rowList.get(0).size();
List<List<Integer>> mergeParams = new ArrayList<>();
while (iterator.hasNext()) {
List<Object> rowDatas = iterator.next();
int startRowIndex = rowIndex;// 记录合并的开始行
HSSFRow bodyRow = sheet.createRow(rowIndex++);
for (int i = 0; i < rowDatas.size(); i++) {
setExcelValue(bodyRow.createCell(i), rowDatas.get(i), style);
}
String key = onlyKeys.get(keyIndex++);
if (subDatas != null) {
List<List<Object>> dataLists = subDatas.get(key);//组装数据的时候至少又一个，没有数据空串填充一个数据
List<Object> firstSub = dataLists.get(0);
for (int i = 0; i < firstSub.size(); i++) {
Object value = firstSub.get(i);
setExcelValue(bodyRow.createCell(rowDatas.size() + i), value, style);
}
for (int i = 1; i < dataLists.size(); i++) {
List<Object> list = dataLists.get(i);
HSSFRow bodyRow2 = sheet.createRow(rowIndex++);
for (int j = 0; j < list.size(); j++) {
Object value = list.get(j);
setExcelValue(bodyRow2.createCell(rowDatas.size() + j), value, style);
}
}
if (dataLists.size() > 1) {
// 依次放入 起始行 结束行 起始列 结束列
for (int i = 0; i < commonTotalSize; i++) {
List<Integer> mergeParam = new ArrayList<>(4);
mergeParam.add(startRowIndex);
mergeParam.add(rowIndex -1);
mergeParam.add(i);
mergeParam.add(i);
mergeParams.add(mergeParam);
}
}
}
}
for (List<Integer> list : mergeParams) {
sheet.addMergedRegion(new CellRangeAddress(list.get(0), list.get(1), list.get(2), list.get(3)));
}
return book;
}
/**
* 常用的 style
*/
public static void buildStyle(HSSFCellStyle style, HSSFWorkbook book) {
// 设置居左
style.setAlignment(CellStyle.ALIGN_CENTER);
// 锤子居中
style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
// 自动换行
style.setWrapText(true);
// 设置边框线条
/*style.setBorderTop(CellStyle.BORDER_THIN);
style.setBorderBottom(CellStyle.BORDER_THIN);
style.setBorderLeft(CellStyle.BORDER_THIN);
style.setBorderRight(CellStyle.BORDER_THIN);*/
// 设置线条颜色
/*style.setBottomBorderColor(HSSFColor.BLACK.index);
style.setLeftBorderColor(HSSFColor.BLACK.index);
style.setRightBorderColor(HSSFColor.BLACK.index);
style.setTopBorderColor(HSSFColor.BLACK.index);*/
// 设置背景颜色 如果要设置背景射 用HSSFCellStyle
// style.setFillForegroundColor(new XSSFColor(new Color(155, 194, 230)));
// 设置
Font headFont = book.createFont();
headFont.setBoldweight(Font.BOLDWEIGHT_BOLD);// 加粗
style.setFont(headFont);
}
/**
* 设置Excel浮点数可做金额等数据统计
* @param cell 单元格类
* @param value 传入的值
*/
public static void setExcelValue(HSSFCell cell, Object value, HSSFCellStyle style) {
// 写数据
if (value == null) {
cell.setCellValue("");
} else {
if (value instanceof Integer || value instanceof Long) {
cell.setCellType(Cell.CELL_TYPE_NUMERIC);
cell.setCellValue(Long.valueOf(value.toString()));
} else if (value instanceof BigDecimal) {
cell.setCellType(Cell.CELL_TYPE_NUMERIC);
cell.setCellValue(((BigDecimal) value).setScale(CommonPlatformConstant.INT_3, RoundingMode.HALF_UP).doubleValue());
} else {
cell.setCellValue(value.toString());
}
cell.setCellStyle(style);
}
}
public static void main(String[] args) {
FileOutputStream fileOut = null;
try {
List<List<Object>> rowList = new ArrayList<List<Object>>();
rowList.add(Arrays.asList("张三", "男"));
rowList.add(Arrays.asList("李四", "男"));
rowList.add(Arrays.asList("王王", "女"));
List<String> onlyKeys = Arrays.asList("zs", "ls", "ww");
List<String> head = Arrays.asList("姓名", "性别", "科目", "成绩", "优良");
Map<String, List<List<Object>>> subDatas = new HashMap<String, List<List<Object>>>();
List<List<Object>> zsCj = new ArrayList<List<Object>>();
zsCj.add(Arrays.asList("语文", "90", "优"));
zsCj.add(Arrays.asList("数学", "98", "优"));
zsCj.add(Arrays.asList("英语", "60", "中"));
subDatas.put("zs", zsCj);
List<List<Object>> lsCj = new ArrayList<List<Object>>();
lsCj.add(Arrays.asList("语文", "100", "优"));
lsCj.add(Arrays.asList("数学", "100", "优"));
lsCj.add(Arrays.asList("英语", "100", "优"));
subDatas.put("ls", lsCj);
List<List<Object>> wwCj = new ArrayList<List<Object>>();
wwCj.add(Arrays.asList("语文", "50", "差"));
wwCj.add(Arrays.asList("数学", "50", "差"));
wwCj.add(Arrays.asList("外语", "50", "差"));
subDatas.put("ww", wwCj);
HSSFWorkbook wb = warpSingleWorkbook2("测试", onlyKeys, head, rowList, subDatas );
fileOut = new FileOutputStream("D:/测试Excel.xls");
// 写入excel文件
wb.write(fileOut);
System.out.println("----Excle文件已生成------");
} catch (Exception e) {
e.printStackTrace();
} finally {
if (fileOut != null) {
try {
fileOut.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
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