首先定义一个注解
java
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface Excel {
/**
* 导出时在excel中排序
*/
int sort() default Integer.MAX_VALUE;
/**
* 导出到Excel中的名字.
*/
String name() default "";
/**
* 首行字段的批注
*/
String comment() default "";
/**
* 日期格式, 如: yyyy-MM-dd
*/
String dateFormat() default "";
/**
* 如果是字典类型，请设置字典的type值 (如: sys_user_sex)
*/
String dictType() default "";
/**
* 读取内容转表达式 (如: 0=男,1=女,2=未知)
*/
String readConverterExp() default "";
/**
* 分隔符，读取字符串组内容
*/
String separator() default ",";
/**
* BigDecimal 精度 默认:-1(默认不开启BigDecimal格式化)
*/
int scale() default -1;
/**
* BigDecimal 舍入规则 默认:BigDecimal.ROUND_HALF_EVEN
*/
int roundingMode() default BigDecimal.ROUND_HALF_EVEN;
/**
* 导出类型（0数字 1字符串）
*/
ColumnType cellType() default ColumnType.STRING;
/**
* 导出时在excel中每个列的高度 单位为字符
*/
double height() default 14;
/**
* 导出时在excel中每个列的宽 单位为字符
*/
double width() default 16;
/**
* 文字后缀,如% 90 变成90%
*/
String suffix() default "";
/**
* 当值为空时,字段的默认值
*/
String defaultValue() default "";
/**
* 提示信息
*/
String prompt() default "";
/**
* 设置只能选择不能输入的列内容.
*/
String[] combo() default {};
/**
* 是否导出数据,应对需求:有时我们需要导出一份模板,这是标题需要但内容需要用户手工填写.
*/
boolean isExport() default true;
/**
* 另一个类中的属性名称,支持多级获取,以小数点隔开
*/
String targetAttr() default "";
/**
* 是否自动统计数据,在最后追加一行统计数据总和
*/
boolean isStatistics() default false;
/**
* 导出字段对齐方式（0：默认；1：靠左；2：居中；3：靠右）
*/
Align align() default Align.AUTO;
/**
* 自定义数据处理器
*/
Class<?> handler() default ExcelHandlerAdapter.class;
/**
* 自定义数据处理器参数
*/
String[] args() default {};
enum Align {
AUTO(0), LEFT(1), CENTER(2), RIGHT(3);
private final int value;
Align(int value) {
this.value = value;
}
public int value() {
return this.value;
}
}
/**
* 字段类型（0：导出导入；1：仅导出；2：仅导入）
*/
Type type() default Type.ALL;
/**
* 字段类型（0：导出导入；1：仅导出；2：仅导入）
*/
enum Type {
ALL(0), EXPORT(1), IMPORT(2);
private final int value;
Type(int value) {
this.value = value;
}
public int value() {
return this.value;
}
}
enum ColumnType {
NUMERIC(0), STRING(1), IMAGE(2);
private final int value;
ColumnType(int value) {
this.value = value;
}
public int value() {
return this.value;
}
}
}定义Excel工具类 里面自动写各种各样的导出方法 excel列名的格式 顺序 字体格式等等
java
public class ExcelUtil<T> {
private static final Logger log = LoggerFactory.getLogger(ExcelUtil.class);
/**
* Excel sheet最大行数
* Excel2007开始的版本最大行数是1048576行
* 满足六个月的订单量下载，现在改为1000000
*/
public static final int sheetSize = 1000000;
/**
* 工作表名称
*/
private String sheetName;
/**
* 导出类型（EXPORT:导出数据；IMPORT：导入模板）
*/
private Type type;
/**
* 工作薄对象
*/
private Workbook wb;
/**
* 工作表对象
*/
private Sheet sheet;
/**
* 样式列表
*/
private Map<String, CellStyle> styles;
/**
* 导入导出数据列表
*/
private List<T> list;
/**
* 注解列表
*/
private List<Object[]> fields;
/**
* 当前行号
*/
private int rownum;
/**
* 标题
*/
private String title;
/**
* 最大高度
*/
private short maxHeight;
/**
* 统计列表
*/
private final Map<Integer, Double> statistics = new HashMap<>();
/**
* 数字格式
*/
private static final DecimalFormat DOUBLE_FORMAT = new DecimalFormat("######0.00");
/**
* 实体对象
*/
public Class<T> clazz;
public ExcelUtil(Class<T> clazz) {
this.clazz = clazz;
}
public void init(List<T> list, String sheetName, String title, Type type) {
if (list == null) {
list = new ArrayList<>();
}
this.list = list;
this.sheetName = sheetName;
this.type = type;
this.title = title;
createExcelField();
createWorkbook();
createTitle();
}
/**
* 创建excel第一行标题
*/
public void createTitle() {
if (StringUtils.isNotEmpty(title)) {
Row titleRow = sheet.createRow(rownum == 0 ? rownum++ : 0);
titleRow.setHeightInPoints(30);
Cell titleCell = titleRow.createCell(0);
titleCell.setCellStyle(styles.get("title"));
titleCell.setCellValue(title);
sheet.addMergedRegion(new CellRangeAddress(titleRow.getRowNum(), titleRow.getRowNum(), titleRow.getRowNum(),
this.fields.size() - 1));
}
}
/**
* 对excel表单默认第一个索引名转换成list
*
* @param is 输入流
* @return 转换后集合
*/
public List<T> importExcel(InputStream is) throws Exception {
return importExcel(is, 0);
}
/**
* 对excel表单默认第一个索引名转换成list
*
* @param is 输入流
* @param titleNum 标题占用行数
* @return 转换后集合
*/
public List<T> importExcel(InputStream is, int titleNum) throws Exception {
return importExcel(StringUtils.EMPTY, is, titleNum);
}
/**
* 对excel表单指定表格索引名转换成list
*
* @param sheetName 表格索引名
* @param titleNum 标题占用行数
* @param is 输入流
* @return 转换后集合
*/
public List<T> importExcel(String sheetName, InputStream is, int titleNum) throws Exception {
this.type = Type.IMPORT;
this.wb = WorkbookFactory.create(is);
List<T> list = new ArrayList<>();
// 如果指定sheet名,则取指定sheet中的内容 否则默认指向第1个sheet
Sheet sheet = StringUtils.isNotEmpty(sheetName) ? wb.getSheet(sheetName) : wb.getSheetAt(0);
if (sheet == null) {
throw new IOException("文件sheet不存在");
}
boolean isXSSFWorkbook = !(wb instanceof HSSFWorkbook);
Map<String, PictureData> pictures;
if (isXSSFWorkbook) {
pictures = getSheetPictures07((XSSFSheet) sheet, (XSSFWorkbook) wb);
} else {
pictures = getSheetPictures03((HSSFSheet) sheet, (HSSFWorkbook) wb);
}
// 获取最后一个非空行的行下标，比如总行数为n，则返回的为n-1
int rows = sheet.getLastRowNum();
if (rows > 0) {
// 定义一个map用于存放excel列的序号和field.
Map<String, Integer> cellMap = new HashMap<>();
// 获取表头
Row heard = sheet.getRow(titleNum);
for (int i = 0; i < heard.getPhysicalNumberOfCells(); i++) {
Cell cell = heard.getCell(i);
if (StringUtils.isNotNull(cell)) {
String value = this.getCellValue(heard, i).toString();
cellMap.put(value, i);
} else {
cellMap.put(null, i);
}
}
// 有数据时才处理 得到类的所有field.
List<Object[]> fields = this.getFields();
Map<Integer, Object[]> fieldsMap = new HashMap<Integer, Object[]>();
for (Object[] objects : fields) {
Excel attr = (Excel) objects[1];
Integer column = cellMap.get(attr.name());
if (column != null) {
fieldsMap.put(column, objects);
}
}
for (int i = titleNum + 1; i <= rows; i++) {
// 从第2行开始取数据,默认第一行是表头.
Row row = sheet.getRow(i);
// 判断当前行是否是空行
if (isRowEmpty(row)) {
continue;
}
T entity = null;
for (Map.Entry<Integer, Object[]> entry : fieldsMap.entrySet()) {
Object val = this.getCellValue(row, entry.getKey());
// 如果不存在实例则新建.
entity = (entity == null ? clazz.newInstance() : entity);
// 从map中得到对应列的field.
Field field = (Field) entry.getValue()[0];
Excel attr = (Excel) entry.getValue()[1];
// 取得类型,并根据对象类型设置值.
Class<?> fieldType = field.getType();
if (String.class == fieldType) {
String s = Convert.toStr(val);
if (StringUtils.endsWith(s, ".0")) {
val = StringUtils.substringBefore(s, ".0");
} else {
String dateFormat = field.getAnnotation(Excel.class).dateFormat();
if (StringUtils.isNotEmpty(dateFormat)) {
val = DateUtils.parseDateToStr(dateFormat, (Date) val);
} else {
val = Convert.toStr(val);
}
}
} else if ((Integer.TYPE == fieldType || Integer.class == fieldType) && StringUtils.isNumeric(Convert.toStr(val))) {
val = Convert.toInt(val);
} else if (Long.TYPE == fieldType || Long.class == fieldType) {
val = Convert.toLong(val);
} else if (Double.TYPE == fieldType || Double.class == fieldType) {
val = Convert.toDouble(val);
} else if (Float.TYPE == fieldType || Float.class == fieldType) {
val = Convert.toFloat(val);
} else if (BigDecimal.class == fieldType) {
val = Convert.toBigDecimal(val);
} else if (Date.class == fieldType) {
if (val instanceof String) {
val = DateUtils.parseDate(val);
} else if (val instanceof Double) {
val = DateUtil.getJavaDate((Double) val);
}
} else if (Boolean.TYPE == fieldType || Boolean.class == fieldType) {
val = Convert.toBool(val, false);
}
if (StringUtils.isNotNull(fieldType)) {
String propertyName = field.getName();
if (StringUtils.isNotEmpty(attr.targetAttr())) {
propertyName = field.getName() + "." + attr.targetAttr();
} else if (StringUtils.isNotEmpty(attr.readConverterExp())) {
val = reverseByExp(Convert.toStr(val), attr.readConverterExp(), attr.separator());
} else if (StringUtils.isNotEmpty(attr.dictType())) {
val = reverseDictByExp(Convert.toStr(val), attr.dictType(), attr.separator());
} else if (!attr.handler().equals(ExcelHandlerAdapter.class)) {
val = dataFormatHandlerAdapter(val, attr);
} else if (ColumnType.IMAGE == attr.cellType() && StringUtils.isNotEmpty(pictures)) {
PictureData image = pictures.get(row.getRowNum() + "_" + entry.getKey());
if (image == null) {
val = "";
} else {
byte[] data = image.getData();
val = FileUtils.writeImportBytes(data);
}
}
ReflectUtils.invokeSetter(entity, propertyName, val);
}
}
list.add(entity);
}
}
return list;
}
/**
* 对list数据源将其里面的数据导入到excel表单
*
* @param list 导出数据集合
* @param sheetName 工作表的名称
* @return 结果
*/
public AjaxResult exportExcel(List<T> list, String sheetName) {
return exportExcel(list, sheetName, StringUtils.EMPTY);
}
/**
* 对list数据源将其里面的数据导入到excel表单
*
* @param list 导出数据集合
* @param sheetName 工作表的名称
* @param title 标题
* @return 结果
*/
public AjaxResult exportExcel(List<T> list, String sheetName, String title) {
this.init(list, sheetName, title, Type.EXPORT);
return exportExcel();
}
/**
* 对list数据源将其里面的数据导入到excel表单
*
* @param response 返回数据
* @param list 导出数据集合
* @param sheetName 工作表的名称
* @return 结果
* @throws IOException
*/
public void exportExcel(HttpServletResponse response, List<T> list, String sheetName) {
exportExcel(response, list, sheetName, StringUtils.EMPTY);
}
/**
* 对list数据源将其里面的数据导入到excel表单
*
* @param outputStream outputStream
* @param list 导出数据集合
* @param sheetName 工作表的名称
*/
public void exportExcel(OutputStream outputStream, List<T> list, String sheetName) {
this.init(list, sheetName, title, Type.EXPORT);
try {
writeSheet();
wb.write(outputStream);
} catch (Exception e) {
log.error("导出Excel异常{}", e.getMessage());
} finally {
IOUtils.closeQuietly(wb);
}
}
/**
* 对list数据源将其里面的数据导入到excel表单
*
* @param response 返回数据
* @param list 导出数据集合
* @param sheetName 工作表的名称
* @param title 标题
* @return 结果
* @throws IOException
*/
public void exportExcel(HttpServletResponse response, List<T> list, String sheetName, String title) {
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
response.setCharacterEncoding("utf-8");
this.init(list, sheetName, title, Type.EXPORT);
exportExcel(response);
}
/**
* 对list数据源将其里面的数据导入到excel表单
*
* @param sheetName 工作表的名称
* @return 结果
*/
public AjaxResult importTemplateExcel(String sheetName) {
return importTemplateExcel(sheetName, StringUtils.EMPTY);
}
/**
* 对list数据源将其里面的数据导入到excel表单
*
* @param sheetName 工作表的名称
* @param title 标题
* @return 结果
*/
public AjaxResult importTemplateExcel(String sheetName, String title) {
this.init(null, sheetName, title, Type.IMPORT);
return exportExcel();
}
/**
* 对list数据源将其里面的数据导入到excel表单
*
* @param sheetName 工作表的名称
* @return 结果
*/
public void importTemplateExcel(HttpServletResponse response, String sheetName) {
importTemplateExcel(response, sheetName, StringUtils.EMPTY);
}
/**
* 对list数据源将其里面的数据导入到excel表单
*
* @param sheetName 工作表的名称
* @param title 标题
* @return 结果
*/
public void importTemplateExcel(HttpServletResponse response, String sheetName, String title) {
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
response.setCharacterEncoding("utf-8");
this.init(null, sheetName, title, Type.IMPORT);
exportExcel(response);
}
/**
* 对list数据源将其里面的数据导入到excel表单
*
* @return 结果
*/
public void exportExcel(HttpServletResponse response) {
try {
writeSheet();
wb.write(response.getOutputStream());
} catch (Exception e) {
log.error("导出Excel异常{}", e.getMessage());
} finally {
IOUtils.closeQuietly(wb);
}
}
/**
* 对list数据源将其里面的数据导入到excel表单
*
* @return 结果
*/
public AjaxResult exportExcel() {
OutputStream out = null;
try {
writeSheet();
String filename = encodingFilename(sheetName);
out = new FileOutputStream(getAbsoluteFile(filename));
wb.write(out);
return AjaxResult.success(filename);
} catch (Exception e) {
log.error("导出Excel异常{}", e.getMessage());
throw new UtilException("导出Excel失败，请联系网站管理员！");
} finally {
IOUtils.closeQuietly(wb);
IOUtils.closeQuietly(out);
}
}
/**
* 创建写入数据到Sheet
*/
public void writeSheet() {
// 取出一共有多少个sheet.
int sheetNo = Math.max(1, (int) Math.ceil(list.size() * 1.0 / sheetSize));
for (int index = 0; index < sheetNo; index++) {
createSheet(sheetNo, index);
// 产生一行
Row row = sheet.createRow(rownum);
int column = 0;
// 写入各个字段的列头名称
for (Object[] os : fields) {
Excel excel = (Excel) os[1];
this.createCell(excel, row, column++);
}
if (Type.EXPORT.equals(type)) {
fillExcelData(index, row);
addStatisticsRow();
}
}
}
/**
* 填充excel数据
*
* @param index 序号
* @param row 单元格行
*/
public void fillExcelData(int index, Row row) {
int startNo = index * sheetSize;
int endNo = Math.min(startNo + sheetSize, list.size());
for (int i = startNo; i < endNo; i++) {
row = sheet.createRow(i + 1 + rownum - startNo);
// 得到导出对象.
T vo = list.get(i);
int column = 0;
for (Object[] os : fields) {
Field field = (Field) os[0];
Excel excel = (Excel) os[1];
this.addCell(excel, row, vo, field, column++);
}
}
}
/**
* 创建表格样式
*
* @param wb 工作薄对象
* @return 样式列表
*/
private Map<String, CellStyle> createStyles(Workbook wb) {
// 写入各条记录,每条记录对应excel表中的一行
Map<String, CellStyle> styles = new HashMap<>();
CellStyle style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.CENTER);
style.setVerticalAlignment(VerticalAlignment.CENTER);
Font titleFont = wb.createFont();
titleFont.setFontName("Arial");
titleFont.setFontHeightInPoints((short) 16);
titleFont.setBold(true);
style.setFont(titleFont);
styles.put("title", style);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.CENTER);
style.setVerticalAlignment(VerticalAlignment.CENTER);
style.setBorderRight(BorderStyle.THIN);
style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
style.setBorderLeft(BorderStyle.THIN);
style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
style.setBorderTop(BorderStyle.THIN);
style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
style.setBorderBottom(BorderStyle.THIN);
style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex());
Font dataFont = wb.createFont();
dataFont.setFontName("Arial");
dataFont.setFontHeightInPoints((short) 10);
style.setFont(dataFont);
styles.put("data", style);
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"));
style.setAlignment(HorizontalAlignment.CENTER);
style.setVerticalAlignment(VerticalAlignment.CENTER);
style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex());
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
Font headerFont = wb.createFont();
headerFont.setFontName("Arial");
headerFont.setFontHeightInPoints((short) 10);
headerFont.setBold(true);
headerFont.setColor(IndexedColors.WHITE.getIndex());
style.setFont(headerFont);
styles.put("header", style);
style = wb.createCellStyle();
style.setAlignment(HorizontalAlignment.CENTER);
style.setVerticalAlignment(VerticalAlignment.CENTER);
Font totalFont = wb.createFont();
totalFont.setFontName("Arial");
totalFont.setFontHeightInPoints((short) 10);
style.setFont(totalFont);
styles.put("total", style);
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"));
style.setAlignment(HorizontalAlignment.LEFT);
styles.put("data1", style);
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"));
style.setAlignment(HorizontalAlignment.CENTER);
styles.put("data2", style);
style = wb.createCellStyle();
style.cloneStyleFrom(styles.get("data"));
style.setAlignment(HorizontalAlignment.RIGHT);
styles.put("data3", style);
return styles;
}
/**
* 创建单元格
*/
public Cell createCell(Excel attr, Row row, int column) {
// 创建列
Cell cell = row.createCell(column);
// 写入列信息
cell.setCellValue(attr.name());
setDataValidation(attr, row, column);
cell.setCellStyle(styles.get("header"));
return cell;
}
/**
* 设置单元格信息
*
* @param value 单元格值
* @param attr 注解相关
* @param cell 单元格信息
*/
public void setCellVo(Object value, Excel attr, Cell cell) {
if (ColumnType.STRING == attr.cellType()) {
cell.setCellValue(StringUtils.isNull(value) ? attr.defaultValue() : value + attr.suffix());
} else if (ColumnType.NUMERIC == attr.cellType()) {
if (StringUtils.isNotNull(value)) {
cell.setCellValue(StringUtils.contains(Convert.toStr(value), ".") ? Convert.toDouble(value) : Convert.toInt(value));
}
} else if (ColumnType.IMAGE == attr.cellType()) {
ClientAnchor anchor = new XSSFClientAnchor(0, 0, 0, 0, (short) cell.getColumnIndex(), cell.getRow().getRowNum(), (short) (cell.getColumnIndex() + 1), cell.getRow().getRowNum() + 1);
String imagePath = Convert.toStr(value);
if (StringUtils.isNotEmpty(imagePath)) {
byte[] data = ImageUtils.getImage(imagePath);
getDrawingPatriarch(cell.getSheet()).createPicture(anchor,
cell.getSheet().getWorkbook().addPicture(data, getImageType(data)));
}
}
}
/**
* 获取画布
*/
public static Drawing<?> getDrawingPatriarch(Sheet sheet) {
if (sheet.getDrawingPatriarch() == null) {
sheet.createDrawingPatriarch();
}
return sheet.getDrawingPatriarch();
}
/**
* 获取图片类型,设置图片插入类型
*/
public int getImageType(byte[] value) {
String type = FileTypeUtils.getFileExtendName(value);
if ("JPG".equalsIgnoreCase(type)) {
return Workbook.PICTURE_TYPE_JPEG;
} else if ("PNG".equalsIgnoreCase(type)) {
return Workbook.PICTURE_TYPE_PNG;
}
return Workbook.PICTURE_TYPE_JPEG;
}
/**
* 创建表格样式
*/
public void setDataValidation(Excel attr, Row row, int column) {
if (attr.name().indexOf("注：") >= 0) {
sheet.setColumnWidth(column, 6000);
} else {
// 设置列宽
sheet.setColumnWidth(column, (int) ((attr.width() + 0.72) * 256));
}
// 如果设置了提示信息则鼠标放上去提示.
if (StringUtils.isNotEmpty(attr.prompt())) {
// 这里默认设了2-101列提示.
setXSSFPrompt(sheet, "", attr.prompt(), 1, 100, column, column);
}
// 如果设置了combo属性则本列只能选择不能输入
if (attr.combo().length > 0) {
// 这里默认设了2-101列只能选择不能输入.
setXSSFValidation(sheet, attr.combo(), 1, 100, column, column);
}
}
/**
* 添加单元格
*/
public Cell addCell(Excel attr, Row row, T vo, Field field, int column) {
Cell cell = null;
try {
// 设置行高
row.setHeight(maxHeight);
// 根据Excel中设置情况决定是否导出,有些情况需要保持为空,希望用户填写这一列.
if (attr.isExport()) {
// 创建cell
cell = row.createCell(column);
int align = attr.align().value();
cell.setCellStyle(styles.get("data" + (align >= 1 && align <= 3 ? align : "")));
// 用于读取对象中的属性
Object value = getTargetValue(vo, field, attr);
String dateFormat = attr.dateFormat();
String readConverterExp = attr.readConverterExp();
String separator = attr.separator();
String dictType = attr.dictType();
if (StringUtils.isNotEmpty(dateFormat) && StringUtils.isNotNull(value)) {
if (value instanceof Date) {
cell.setCellValue(DateUtils.parseDateToStr(dateFormat, (Date) value));
} else {
cell.setCellValue(DateUtils.parseDateTimeToStr(dateFormat, (LocalDateTime) value));
}
} else if (StringUtils.isNotEmpty(readConverterExp) && StringUtils.isNotNull(value)) {
cell.setCellValue(convertByExp(Convert.toStr(value), readConverterExp, separator));
} else if (StringUtils.isNotEmpty(dictType) && StringUtils.isNotNull(value)) {
cell.setCellValue(convertDictByExp(Convert.toStr(value), dictType, separator));
} else if (value instanceof BigDecimal && -1 != attr.scale()) {
cell.setCellValue((((BigDecimal) value).setScale(attr.scale(), attr.roundingMode())).toString());
} else if (!attr.handler().equals(ExcelHandlerAdapter.class)) {
cell.setCellValue(dataFormatHandlerAdapter(value, attr));
} else {
// 设置列类型
setCellVo(value, attr, cell);
}
addStatisticsData(column, Convert.toStr(value), attr);
}
} catch (Exception e) {
log.error("导出Excel失败", e);
}
return cell;
}
/**
* 设置 POI XSSFSheet 单元格提示
*
* @param sheet 表单
* @param promptTitle 提示标题
* @param promptContent 提示内容
* @param firstRow 开始行
* @param endRow 结束行
* @param firstCol 开始列
* @param endCol 结束列
*/
public void setXSSFPrompt(Sheet sheet, String promptTitle, String promptContent, int firstRow, int endRow,
int firstCol, int endCol) {
DataValidationHelper helper = sheet.getDataValidationHelper();
DataValidationConstraint constraint = helper.createCustomConstraint("DD1");
CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol);
DataValidation dataValidation = helper.createValidation(constraint, regions);
dataValidation.createPromptBox(promptTitle, promptContent);
dataValidation.setShowPromptBox(true);
sheet.addValidationData(dataValidation);
}
/**
* 设置某些列的值只能输入预制的数据,显示下拉框.
*
* @param sheet 要设置的sheet.
* @param textlist 下拉框显示的内容
* @param firstRow 开始行
* @param endRow 结束行
* @param firstCol 开始列
* @param endCol 结束列
* @return 设置好的sheet.
*/
public void setXSSFValidation(Sheet sheet, String[] textlist, int firstRow, int endRow, int firstCol, int endCol) {
DataValidationHelper helper = sheet.getDataValidationHelper();
// 加载下拉列表内容
DataValidationConstraint constraint = helper.createExplicitListConstraint(textlist);
// 设置数据有效性加载在哪个单元格上,四个参数分别是：起始行、终止行、起始列、终止列
CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol);
// 数据有效性对象
DataValidation dataValidation = helper.createValidation(constraint, regions);
// 处理Excel兼容性问题
if (dataValidation instanceof XSSFDataValidation) {
dataValidation.setSuppressDropDownArrow(true);
dataValidation.setShowErrorBox(true);
} else {
dataValidation.setSuppressDropDownArrow(false);
}
sheet.addValidationData(dataValidation);
}
/**
* 解析导出值 0=男,1=女,2=未知
*
* @param propertyValue 参数值
* @param converterExp 翻译注解
* @param separator 分隔符
* @return 解析后值
*/
public static String convertByExp(String propertyValue, String converterExp, String separator) {
StringBuilder propertyString = new StringBuilder();
String[] convertSource = converterExp.split(",");
for (String item : convertSource) {
String[] itemArray = item.split("=");
if (StringUtils.containsAny(separator, propertyValue)) {
for (String value : propertyValue.split(separator)) {
if (itemArray[0].equals(value)) {
propertyString.append(itemArray[1]).append(separator);
break;
}
}
} else {
if (itemArray[0].equals(propertyValue)) {
return itemArray[1];
}
}
}
return StringUtils.stripEnd(propertyString.toString(), separator);
}
/**
* 反向解析值 男=0,女=1,未知=2
*
* @param propertyValue 参数值
* @param converterExp 翻译注解
* @param separator 分隔符
* @return 解析后值
*/
public static String reverseByExp(String propertyValue, String converterExp, String separator) {
StringBuilder propertyString = new StringBuilder();
String[] convertSource = converterExp.split(",");
for (String item : convertSource) {
String[] itemArray = item.split("=");
if (StringUtils.containsAny(separator, propertyValue)) {
for (String value : propertyValue.split(separator)) {
if (itemArray[1].equals(value)) {
propertyString.append(itemArray[0]).append(separator);
break;
}
}
} else {
if (itemArray[1].equals(propertyValue)) {
return itemArray[0];
}
}
}
return StringUtils.stripEnd(propertyString.toString(), separator);
}
/**
* 解析字典值
*
* @param dictValue 字典值
* @param dictType 字典类型
* @param separator 分隔符
* @return 字典标签
*/
public static String convertDictByExp(String dictValue, String dictType, String separator) {
return DictUtils.getDictLabel(dictType, dictValue, separator);
}
/**
* 反向解析值字典值
*
* @param dictLabel 字典标签
* @param dictType 字典类型
* @param separator 分隔符
* @return 字典值
*/
public static String reverseDictByExp(String dictLabel, String dictType, String separator) {
return DictUtils.getDictValue(dictType, dictLabel, separator);
}
/**
* 数据处理器
*
* @param value 数据值
* @param excel 数据注解
* @return
*/
public String dataFormatHandlerAdapter(Object value, Excel excel) {
try {
Object instance = excel.handler().newInstance();
Method formatMethod = excel.handler().getMethod("format", Object.class, String[].class);
value = formatMethod.invoke(instance, value, excel.args());
} catch (Exception e) {
log.error("不能格式化数据{}", excel.handler(), e);
}
return Convert.toStr(value);
}
/**
* 合计统计信息
*/
private void addStatisticsData(Integer index, String text, Excel entity) {
if (entity != null && entity.isStatistics()) {
Double temp = 0D;
if (!statistics.containsKey(index)) {
statistics.put(index, temp);
}
try {
temp = Double.valueOf(text);
} catch (NumberFormatException e) {
log.error("数据格式化异常{}", temp, e);
}
statistics.put(index, statistics.get(index) + temp);
}
}
/**
* 创建统计行
*/
public void addStatisticsRow() {
if (statistics.size() > 0) {
Row row = sheet.createRow(sheet.getLastRowNum() + 1);
Set<Integer> keys = statistics.keySet();
Cell cell = row.createCell(0);
cell.setCellStyle(styles.get("total"));
cell.setCellValue("合计");
for (Integer key : keys) {
cell = row.createCell(key);
cell.setCellStyle(styles.get("total"));
cell.setCellValue(DOUBLE_FORMAT.format(statistics.get(key)));
}
statistics.clear();
}
}
/**
* 编码文件名
*/
public String encodingFilename(String filename) {
filename = UUID.randomUUID() + "_" + filename + ".xlsx";
return filename;
}
/**
* 获取下载路径
*
* @param filename 文件名称
*/
public String getAbsoluteFile(String filename) {
String downloadPath = AusDrpConfig.getDownloadPath() + filename;
File desc = new File(downloadPath);
if (!desc.getParentFile().exists()) {
desc.getParentFile().mkdirs();
}
return downloadPath;
}
/**
* 获取bean中的属性值
*
* @param vo 实体对象
* @param field 字段
* @param excel 注解
* @return 最终的属性值
* @throws Exception
*/
private Object getTargetValue(T vo, Field field, Excel excel) throws Exception {
Object o = field.get(vo);
if (StringUtils.isNotEmpty(excel.targetAttr())) {
String target = excel.targetAttr();
if (target.contains(".")) {
String[] targets = target.split("[.]");
for (String name : targets) {
o = getValue(o, name);
}
} else {
o = getValue(o, target);
}
}
return o;
}
/**
* 以类的属性的get方法方法形式获取值
*
* @param o
* @param name
* @return value
* @throws Exception
*/
private Object getValue(Object o, String name) throws Exception {
if (StringUtils.isNotNull(o) && StringUtils.isNotEmpty(name)) {
Class<?> clazz = o.getClass();
Field field = clazz.getDeclaredField(name);
field.setAccessible(true);
o = field.get(o);
}
return o;
}
/**
* 得到所有定义字段
*/
private void createExcelField() {
this.fields = getFields();
this.fields = this.fields.stream().sorted(Comparator.comparing(objects -> ((Excel) objects[1]).sort())).collect(Collectors.toList());
this.maxHeight = getRowHeight();
}
/**
* 获取字段注解信息
*/
public List<Object[]> getFields() {
List<Object[]> fields = new ArrayList<>();
List<Field> tempFields = new ArrayList<>();
tempFields.addAll(Arrays.asList(clazz.getSuperclass().getDeclaredFields()));
tempFields.addAll(Arrays.asList(clazz.getDeclaredFields()));
for (Field field : tempFields) {
// 单注解
if (field.isAnnotationPresent(Excel.class)) {
Excel attr = field.getAnnotation(Excel.class);
if (attr != null && (attr.type() == Type.ALL || attr.type() == type)) {
field.setAccessible(true);
fields.add(new Object[]{field, attr});
}
}
// 多注解
if (field.isAnnotationPresent(Excels.class)) {
Excels attrs = field.getAnnotation(Excels.class);
Excel[] excels = attrs.value();
for (Excel attr : excels) {
if (attr != null && (attr.type() == Type.ALL || attr.type() == type)) {
field.setAccessible(true);
fields.add(new Object[]{field, attr});
}
}
}
}
return fields;
}
/**
* 根据注解获取最大行高
*/
public short getRowHeight() {
double maxHeight = 0;
for (Object[] os : this.fields) {
Excel excel = (Excel) os[1];
maxHeight = Math.max(maxHeight, excel.height());
}
return (short) (maxHeight * 20);
}
/**
* 创建一个工作簿
*/
public void createWorkbook() {
this.wb = new SXSSFWorkbook();
this.sheet = wb.createSheet();
wb.setSheetName(0, sheetName);
this.styles = createStyles(wb);
}
/**
* 创建工作表
*
* @param sheetNo sheet数量
* @param index 序号
*/
public void createSheet(int sheetNo, int index) {
// 设置工作表的名称.
if (sheetNo > 1 && index > 0) {
this.sheet = wb.createSheet();
this.createTitle();
wb.setSheetName(index, sheetName + index);
}
}
/**
* 获取单元格值
*
* @param row 获取的行
* @param column 获取单元格列号
* @return 单元格值
*/
public Object getCellValue(Row row, int column) {
if (row == null) {
return null;
}
Object val = "";
try {
Cell cell = row.getCell(column);
if (StringUtils.isNotNull(cell)) {
if (cell.getCellType() == CellType.NUMERIC || cell.getCellType() == CellType.FORMULA) {
val = cell.getNumericCellValue();
if (DateUtil.isCellDateFormatted(cell)) {
val = DateUtil.getJavaDate((Double) val); // POI Excel 日期格式转换
} else {
if ((Double) val % 1 != 0) {
val = new BigDecimal(val.toString());
} else {
val = new DecimalFormat("0").format(val);
}
}
} else if (cell.getCellType() == CellType.STRING) {
val = cell.getStringCellValue();
} else if (cell.getCellType() == CellType.BOOLEAN) {
val = cell.getBooleanCellValue();
} else if (cell.getCellType() == CellType.ERROR) {
val = cell.getErrorCellValue();
}
}
} catch (Exception e) {
return val;
}
return val;
}
/**
* 判断是否是空行
*
* @param row 判断的行
* @return
*/
private boolean isRowEmpty(Row row) {
if (row == null) {
return true;
}
for (int i = row.getFirstCellNum(); i < row.getLastCellNum(); i++) {
Cell cell = row.getCell(i);
if (cell != null && cell.getCellType() != CellType.BLANK) {
return false;
}
}
return true;
}
/**
* 获取Excel2003图片
*
* @param sheet 当前sheet对象
* @param workbook 工作簿对象
* @return Map key:图片单元格索引（1_1）String，value:图片流PictureData
*/
public static Map<String, PictureData> getSheetPictures03(HSSFSheet sheet, HSSFWorkbook workbook) {
Map<String, PictureData> sheetIndexPicMap = new HashMap<>();
List<HSSFPictureData> pictures = workbook.getAllPictures();
if (!pictures.isEmpty()) {
for (HSSFShape shape : sheet.getDrawingPatriarch().getChildren()) {
HSSFClientAnchor anchor = (HSSFClientAnchor) shape.getAnchor();
if (shape instanceof HSSFPicture) {
HSSFPicture pic = (HSSFPicture) shape;
int pictureIndex = pic.getPictureIndex() - 1;
HSSFPictureData picData = pictures.get(pictureIndex);
String picIndex = (anchor.getRow1()) + "_" + String.valueOf(anchor.getCol1());
sheetIndexPicMap.put(picIndex, picData);
}
}
return sheetIndexPicMap;
} else {
return sheetIndexPicMap;
}
}
/**
* 获取Excel2007图片
*
* @param sheet 当前sheet对象
* @param workbook 工作簿对象
* @return Map key:图片单元格索引（1_1）String，value:图片流PictureData
*/
public static Map<String, PictureData> getSheetPictures07(XSSFSheet sheet, XSSFWorkbook workbook) {
Map<String, PictureData> sheetIndexPicMap = new HashMap<>();
for (POIXMLDocumentPart dr : sheet.getRelations()) {
if (dr instanceof XSSFDrawing) {
XSSFDrawing drawing = (XSSFDrawing) dr;
List<XSSFShape> shapes = drawing.getShapes();
for (XSSFShape shape : shapes) {
if (shape instanceof XSSFPicture) {
XSSFPicture pic = (XSSFPicture) shape;
XSSFClientAnchor anchor = pic.getPreferredSize();
CTMarker ctMarker = anchor.getFrom();
String picIndex = ctMarker.getRow() + "_" + ctMarker.getCol();
sheetIndexPicMap.put(picIndex, pic.getPictureData());
}
}
}
}
return sheetIndexPicMap;
}
/**
* 导出Excel（可以导出到本地文件系统，也可以导出到浏览器，可自定义工作表大小）
*
* @param list 数据源
* @param fieldMap 类的英文属性和Excel中的中文列名的对应关系 如果需要的是引用对象的属性，则英文属性使用类似于EL表达式的格式 如：list中存放的都是student，student中又有college属性，而我们需要学院名称，则可以这样写
* fieldMap.put("college.collegeName","学院名称")
* @param sheetName 工作表的名称
* @param sheetSize 每个工作表中记录的最大个数
* @param out 导出流
*/
public static <T> void listToExcel(List<T> list, LinkedHashMap<String, String> fieldMap, String sheetName, int sheetSize, OutputStream out) throws Exception {
if (list == null) {
throw new Exception("数据源中没有任何数据");
}
if (sheetSize > 65535 || sheetSize < 1) {
sheetSize = 65535;
}
// 创建工作簿并发送到OutputStream指定的地方
try {
HSSFWorkbook workbook = new HSSFWorkbook();
// 因为2003的Excel一个工作表最多可以有65536条记录，除去列头剩下65535条
// 所以如果记录太多，需要放到多个工作表中，其实就是个分页的过程
// 1.计算一共有多少个工作表
double sheetNum = Math.ceil(list.size() / new Integer(sheetSize).doubleValue());
if (sheetNum == 0) {
sheetNum = 1;
}
// 2.创建相应的工作表，并向其中填充数据
for (int i = 0; i < sheetNum; i++) {
// 如果只有一个工作表的情况
if (1 == sheetNum) {
HSSFSheet sheet = null;
if (null == sheetName) {
sheet = workbook.createSheet();
} else {
sheet = workbook.createSheet(sheetName);
}
if (list.size() == 0) {
fillSheetHeader(sheet, fieldMap);
} else {
fillSheet(sheet, list, fieldMap, 0, list.size() - 1);
}
// 有多个工作表的情况
} else {
HSSFSheet sheet = null;
if (null == sheetName) {
sheet = workbook.createSheet();
} else {
sheet = workbook.createSheet(sheetName + (i + 1));
}
// 获取开始索引和结束索引
int firstIndex = i * sheetSize;
int lastIndex = Math.min((i + 1) * sheetSize - 1, list.size() - 1);
// 填充工作表
fillSheet(sheet, list, fieldMap, firstIndex, lastIndex);
}
}
workbook.write(out);
workbook.close();
} catch (Exception e) {
log.error(e.getMessage(), e);
//throw new BusinessException(ErrorCodeEnum.SYS_ERROR.getCode(), "导出Excel失败");
}
}
/**
* 根据字段名获取字段值
*
* @param fieldName 字段名
* @param o 对象
* @return 字段值
*/
private static Object getFieldValueByName(String fieldName, Object o) throws Exception {
Object value = null;
Field field = getFieldByName(fieldName, o.getClass());
if (field != null) {
field.setAccessible(true);
value = field.get(o);
// 实体类型,isAssignableFrom判断是否为父类
// if (value == null && BaseEntity.class.isAssignableFrom(field.getType())) {
// value = objenesis.newInstance(field.getType());
// field.set(o, value);
// }
} else {
// throw new BusinessException(ErrorCodeEnum.SYS_ERROR.getCode(), o.getClass().getSimpleName() + "类不存在字段名 " + fieldName);
}
return value;
}
/**
* 根据字段名获取字段
*
* @param fieldName 字段名
* @param clazz 包含该字段的类
* @return 字段
*/
private static Field getFieldByName(String fieldName, Class<?> clazz) {
// 拿到本类的所有字段
Field[] selfFields = clazz.getDeclaredFields();
// 如果本类中存在该字段，则返回
for (Field field : selfFields) {
if (field.getName().equals(fieldName)) {
return field;
}
}
// 否则，查看父类中是否存在此字段，如果有则返回
Class<?> superClazz = clazz.getSuperclass();
if (superClazz != null && superClazz != Object.class) {
return getFieldByName(fieldName, superClazz);
}
// 如果本类和父类都没有，则返回空
return null;
}
/**
* 根据带路径或不带路径的属性名获取属性值 即接受简单属性名，如userName等，又接受带路径的属性名，如student.department.name等
*
* @param fieldNameSequence 带路径的属性名或简单属性名
* @param o 对象
* @return 属性值
*/
private static Object getFieldValueByNameSequence(String fieldNameSequence, Object o) throws Exception {
Object value = null;
// 将fieldNameSequence进行拆分
String[] attributes = fieldNameSequence.split("\\.");
if (attributes.length == 1) {
value = getFieldValueByName(fieldNameSequence, o);
if (value instanceof Calendar) {
// Calendar 则转换成yyyy-MM-dd HH:mm:ss格式
Calendar calendar = ((Calendar) value).getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd HH:mm:ss");
value = sdf.format(calendar.getTime());
}
} else {
// 根据属性名获取属性对象
Object fieldObj = getFieldValueByName(attributes[0], o);
String subFieldNameSequence = fieldNameSequence.substring(fieldNameSequence.indexOf(".") + 1);
value = getFieldValueByNameSequence(subFieldNameSequence, fieldObj);
}
return value;
}
/**
* 设置工作表自动列宽和首行加粗
*
* @param ws sheet页
*/
private static void setColumnAutoSize(Sheet ws) {
Row row = null;
if (ws != null && ws.getLastRowNum() >= 0) {
row = ws.getRow(0);
}
// 获取本列的最宽单元格的宽度
for (int i = 0; i < row.getPhysicalNumberOfCells(); i++) {
int colWith = 0;
for (int j = 0; j <= ws.getLastRowNum(); j++) {
Cell cell = ws.getRow(j).getCell(i);
if (cell != null) {
String content = cell.getStringCellValue();
int cellWith = content.length();
if (colWith < cellWith) {
colWith = cellWith;
}
}
}
int columnWidth = (colWith + 1) * 512;
// 设置最大列宽
if (columnWidth > 12000) {
columnWidth = 12000;
}
// 设置单元格的宽度为最宽宽度+额外宽度
ws.setColumnWidth(i, columnWidth);
}
}
/**
* 向工作表中填充数据
*
* @param sheet 工作表
* @param list 数据源
* @param fieldMap 中英文字段对应关系的Map
* @param firstIndex 开始索引
* @param lastIndex 结束索引
*/
private static <T> void fillSheet(Sheet sheet, List<T> list, Map<String, String> fieldMap, int firstIndex, int lastIndex) throws Exception {
CellStyle cellStyle = sheet.getWorkbook().createCellStyle();
// // 设置垂直居中和自动换行
// cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
// // 设置水平居中
// cellStyle.setAlignment(HorizontalAlignment.CENTER);
// 字符串格式
cellStyle.setWrapText(true);
// 设置表头
String[] enFields = fillSheetHeader(sheet, fieldMap);
// 填充内容
int rowNo = 1;
for (int index = firstIndex; index <= lastIndex; index++) {
Row row = sheet.createRow(rowNo);
// 获取单个对象
T item = list.get(index);
// 添加序号
addIndex(row, cellStyle, index);
if (item instanceof Map) {
// 处理Map
@SuppressWarnings("unchecked") Map<String, String> itemMap = (Map<String, String>) item;
for (int i = 1; i < enFields.length; i++) {
String fieldValue = null;
if (itemMap.containsKey(enFields[i])) {
fieldValue = itemMap.get(enFields[i]);
}
if (fieldValue != null) {
Cell cell = row.createCell(i);
cell.setCellStyle(cellStyle);
cell.setCellValue(fieldValue);
}
}
} else {
for (int i = 0; i < enFields.length; i++) {
Object objValue = getFieldValueByNameSequence(enFields[i], item);
String fieldValue = objValue == null ? "" : objValue.toString();
Cell cell = row.createCell(i);
cell.setCellStyle(cellStyle);
cell.setCellValue(fieldValue);
}
}
rowNo++;
}
// 设置自动列宽
setColumnAutoSize(sheet);
}
/**
* 功能描述: 添加序号列
*
* @param row : 行对象
* @param cellStyle : 格式
* @param index : 序号
* @author yansj
* @date 2020/6/19 11:08
**/
private static void addIndex(Row row, CellStyle cellStyle, int index) {
Cell cell = row.createCell(0);
cell.setCellStyle(cellStyle);
cell.setCellValue(String.valueOf(index + 1));
}
private static <T> String[] fillSheetHeader(Sheet sheet, Map<String, String> fieldMap) throws Exception {
// 定义存放英文字段名和中文字段名的数组
String[] enFields = new String[fieldMap.size()];
String[] cnFields = new String[fieldMap.size()];
// 填充数组
int count = 0;
for (Map.Entry<String, String> entry : fieldMap.entrySet()) {
enFields[count] = entry.getKey();
cnFields[count] = entry.getValue();
count++;
}
CellStyle style = sheet.getWorkbook().createCellStyle();
// 创建一个居中格式
// style.setAlignment(HorizontalAlignment.CENTER);
Font headFont = sheet.getWorkbook().createFont();
// headFont.setBold(true);
headFont.setFontName("宋体");
headFont.setFontHeightInPoints((short) 11);
style.setFont(headFont);
// 填充表头
Row headerRow = sheet.createRow(0);
for (int i = 0; i < cnFields.length; i++) {
Cell cell = headerRow.createCell(i);
cell.setCellStyle(style);
// if (i == 0) {
// cell.setCellValue("序号");
// } else {
cell.setCellValue(cnFields[i]);
//}
}
return enFields;
}
public void writeExcelSheets(Workbook workbook, Sheet sheet, List<T> recordList) {
initSheet(recordList, Type.EXPORT, workbook, sheet);
writeSingleSheet(sheet);
}
public void writeExcelSheetsField(Workbook workbook, Sheet sheet, List<T> recordList, List<String> filedList) {
initSheetCustomize(recordList, Type.EXPORT, workbook, sheet, filedList);
writeSingleSheet(sheet);
}
public void initSheet(List<T> list, Type type, Workbook workbook, Sheet sheet) {
if (list == null) {
list = new ArrayList<>();
}
this.list = list;
this.type = type;
this.sheet = sheet;
createExcelField();
this.styles = createStyles(workbook);
}
public void initSheetCustomize(List<T> list, Type type, Workbook workbook, Sheet sheet, List<String> filedList) {
if (list == null) {
list = new ArrayList<>();
}
this.list = list;
this.type = type;
this.sheet = sheet;
createExcelCustomizeField(filedList);
this.styles = createStyles(workbook);
}
/**
* 得到所有定义字段
*/
private void createExcelCustomizeField(List<String> filedList) {
this.fields = getCustomizeFields(filedList);
this.fields = this.fields.stream().sorted(Comparator.comparing(objects -> ((Excel) objects[1]).sort())).collect(Collectors.toList());
this.maxHeight = getRowHeight();
}
/**
* 获取字段注解信息
* 输出用户需要的列数据
*/
public List<Object[]> getCustomizeFields(List<String> filedList) {
List<Object[]> fields = new ArrayList<>();
List<Field> tempFields = new ArrayList<>();
tempFields.addAll(Arrays.asList(clazz.getSuperclass().getDeclaredFields()));
tempFields.addAll(Arrays.asList(clazz.getDeclaredFields()));
for (Field field : tempFields) {
// 单注解
if (field.isAnnotationPresent(Excel.class)) {
Excel attr = field.getAnnotation(Excel.class);
if (attr != null && (attr.type() == Type.ALL || attr.type() == type) && filedList.contains(attr.name())) {
field.setAccessible(true);
fields.add(new Object[]{field, attr});
}
}
// 多注解
if (field.isAnnotationPresent(Excels.class)) {
Excels attrs = field.getAnnotation(Excels.class);
Excel[] excels = attrs.value();
for (Excel attr : excels) {
if (attr != null && (attr.type() == Type.ALL || attr.type() == type) && filedList.contains(attr.name())) {
field.setAccessible(true);
fields.add(new Object[]{field, attr});
}
}
}
}
return fields;
}
/**
* 创建写入数据到Sheet
*/
public void writeSingleSheet(Sheet sheet) {
// 产生一行
Row row = sheet.createRow(rownum);
int column = 0;
// 写入各个字段的列头名称
for (Object[] os : fields) {
Excel excel = (Excel) os[1];
this.createCellWithComment(sheet, excel, row, column++);
}
if (Type.EXPORT.equals(type)) {
fillExcelData(sheet, Constants.ZERO, row);
}
}
public void fillExcelData(Sheet sheet, int index, Row row) {
int startNo = index * sheetSize;
int endNo = Math.min(startNo + sheetSize, list.size());
for (int i = startNo; i < endNo; i++) {
row = sheet.createRow(i + 1 + rownum - startNo);
// 得到导出对象.
T vo = list.get(i);
int column = 0;
for (Object[] os : fields) {
Field field = (Field) os[0];
Excel excel = (Excel) os[1];
this.addCell(excel, row, vo, field, column++);
}
}
}
/**
* 创建单元格
*/
public Cell createCellWithComment(Sheet sheet, Excel attr, Row row, int column) {
// 创建列
Cell cell = row.createCell(column);
// 写入列信息
cell.setCellValue(attr.name());
if (ObjectUtil.isNotEmpty(attr.comment())) {
// 创建批注并将其与单元格关联
Drawing<?> drawing = sheet.createDrawingPatriarch();
Comment comment = drawing.createCellComment(new XSSFClientAnchor());
comment.setString(new XSSFRichTextString(attr.comment()));
// 将批注添加到单元格
cell.setCellComment(comment);
}
setDataValidation(attr, row, column);
cell.setCellStyle(styles.get("header"));
return cell;
}
}然后在你需要导出类的属性上加上该注解@Excel
java
@Data
public class DTO {
@Excel(name = "Sales Platform")
private String salesPlatform;
@Excel(name = "Total Amount", comment = "Original total order amount provided by the sales platform")
private String salesOrderTotal;
@Excel(name = "Sales Order Type", comment = "standard order OR preorder order")
private String salesOrderType;
@Excel(name = "Sales Order Number")
private String salesOrderNumber;
}最后我们修改完我们需要导出的list以后，就可以直接实现导出的excel文件给前端了
实现的效果 如图所示
