若依框架生成多个sheet的Excel方法

小小小幸运 · 2024-10-9 13:27:04

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步骤：
1，创建一个Excel的sheet的实体类

package com.XXX.common.utils.poi;
import java.util.List;
public class ExcelExp {
private String fileName;// sheet的名称
private String[] handers;// sheet里的标题
private List dataset;// sheet里的数据集
private Class clazz;
public ExcelExp(String fileName, List dataset, Class clazz) {
this.fileName = fileName;
this.dataset = dataset;
this.clazz = clazz;
}
public String getFileName() {
return fileName;
}
public void setFileName(String fileName) {
this.fileName = fileName;
}
public String[] getHanders() {
return handers;
}
public void setHanders(String[] handers) {
this.handers = handers;
}
public List getDataset() {
return dataset;
}
public void setDataset(List dataset) {
this.dataset = dataset;
}
public Class getClazz() {
return clazz;
}
public void setClazz(Class clazz) {
this.clazz = clazz;
}
}

复制代码

2,创建生成多个sheet的工具类

package com.XXX.common.utils.poi;
import com.XXX.common.annotation.Excel;
import com.XXX.common.utils.poi.ExcelExp;
import com.XXX.common.annotation.Excel.ColumnType;
import com.XXX.common.annotation.Excel.Type;
import com.XXX.common.annotation.Excels;
import com.XXX.common.core.text.Convert;
import com.XXX.common.utils.DateUtils;
import com.XXX.common.utils.StringUtils;
import com.XXX.common.utils.file.FileTypeUtils;
import com.XXX.common.utils.file.ImageUtils;
import com.XXX.common.utils.poi.ExcelUtil;
import com.XXX.common.utils.reflect.ReflectUtils;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddressList;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
import org.apache.poi.xssf.usermodel.XSSFDataValidation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.util.*;
import java.util.stream.Collectors;
/**
* Excel相关处理
*
* @author ruoyi
*/
public class ExcelUtilManySheet<T> {
private static final Logger log = LoggerFactory.getLogger(ExcelUtil.class);
/**
* Excel sheet最大行数，默认65536
*/
public static final int sheetSize = 65536;
/**
* 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;
/**
* 最大高度
*/
private short maxHeight;
/**
* 统计列表
*/
private Map<Integer, Double> statistics = new HashMap<Integer, Double>();
/**
* 数字格式
*/
private static final DecimalFormat DOUBLE_FORMAT = new DecimalFormat("######0.00");
/**
* 实体对象
*/
public Class<T> clazz;
public List<ExcelExp> clazzlist;
public ExcelUtilManySheet(List<ExcelExp> clazzlist) {
this.clazzlist = clazzlist;
}
public void init(List<T> list, String sheetName, Type type) {
if (list == null) {
list = new ArrayList<T>();
}
this.list = list;
this.sheetName = sheetName;
this.type = type;
createExcelField();
}
/**
* 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(StringUtils.EMPTY, is);
}
/**
* 对excel表单指定表格索引名转换成list
*
* @param sheetName 表格索引名
* @param is 输入流
* @return 转换后集合
*/
public List<T> importExcel(String sheetName, InputStream is) throws Exception {
this.type = Type.IMPORT;
this.wb = WorkbookFactory.create(is);
List<T> list = new ArrayList<T>();
Sheet sheet = null;
if (StringUtils.isNotEmpty(sheetName)) {
// 如果指定sheet名,则取指定sheet中的内容.
sheet = wb.getSheet(sheetName);
} else {
// 如果传入的sheet名不存在则默认指向第1个sheet.
sheet = wb.getSheetAt(0);
}
if (sheet == null) {
throw new IOException("文件sheet不存在");
}
int rows = sheet.getPhysicalNumberOfRows();
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<String, Integer>();
// 获取表头
Row heard = sheet.getRow(0);
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.
Field[] allFields = clazz.getDeclaredFields();
// 定义一个map用于存放列的序号和field.
Map<Integer, Field> fieldsMap = new HashMap<Integer, Field>();
for (int col = 0; col < allFields.length; col++) {
Field field = allFields[col];
Excel attr = field.getAnnotation(Excel.class);
if (attr != null && (attr.type() == Type.ALL || attr.type() == type)) {
// 设置类的私有字段属性可访问.
field.setAccessible(true);
Integer column = cellMap.get(attr.name());
if (column != null) {
fieldsMap.put(column, field);
}
}
}
for (int i = 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);
T entity = null;
for (Map.Entry<Integer, Field> 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 = fieldsMap.get(entry.getKey());
// 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)) {
Excel attr = field.getAnnotation(Excel.class);
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());
}
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 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) throws IOException {
response.setContentType("application/vnd.ms-excel");
response.setCharacterEncoding("utf-8");
this.init(list, sheetName, Type.EXPORT);
exportExcel(response.getOutputStream());
}
/**
* 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
* @return 结果
* @throws IOException
*/
public void exportExcelManySheet(HttpServletResponse response, List<ExcelExp> list) throws IOException {
response.setContentType("application/vnd.ms-excel");
response.setCharacterEncoding("utf-8");
try {
createWorkbook();
for (int index = 0; index <list.size(); index++) {
this.clazz = list.get(index).getClazz();
this.init(list.get(index).getDataset(), list.get(index).getFileName(), Excel.Type.EXPORT);
// 取出一共有多少个sheet.
// double sheetNo = Math.ceil(list.size() / sheetSize);
createSheetManySheet(index);
// 产生一行
Row row = sheet.createRow(0);
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();
}
}
wb.write(response.getOutputStream());
} catch (IOException e) {
log.error("导出Excel异常{}", e.getMessage());
} finally {
if (wb != null) {
try {
wb.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
if (response.getOutputStream() != null) {
try {
response.getOutputStream().close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
// exportExcel(response.getOutputStream());
}
/**
* 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) throws IOException {
response.setContentType("application/vnd.ms-excel");
response.setCharacterEncoding("utf-8");
this.init(null, sheetName, Type.IMPORT);
exportExcel(response.getOutputStream());
}
/**
* 对list数据源将其里面的数据导入到excel表单
*
* @return 结果
*/
public void exportExcel(OutputStream outputStream) {
try {
// 取出一共有多少个sheet.
double sheetNo = Math.ceil(list.size() / sheetSize);
for (int index = 0; index <= sheetNo; index++) {
createSheet(sheetNo, index);
// 产生一行
Row row = sheet.createRow(0);
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();
}
}
wb.write(outputStream);
} catch (Exception e) {
log.error("导出Excel异常{}", e.getMessage());
} finally {
if (wb != null) {
try {
wb.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
}
/**
* 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 = 0; i < list.size(); i++) {
row = sheet.createRow(i + 1 );
// 得到导出对象.
T vo = (T) list.get(i);
int column = 0;
for (Object[] os : fields) {
Field field = (Field) os[0];
Excel excel = (Excel) os[1];
// 设置实体类私有属性可访问
field.setAccessible(true);
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<String, CellStyle>();
CellStyle 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 (Excel.ColumnType.STRING == attr.cellType()) {
cell.setCellValue(StringUtils.isNull(value) ? attr.defaultValue() : value + attr.suffix());
} else if (Excel.ColumnType.NUMERIC == attr.cellType()) {
cell.setCellValue(StringUtils.contains(Convert.toStr(value), ".") ? Convert.toDouble(value) : Convert.toInt(value));
} else if (Excel.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().getCode();
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();
if (StringUtils.isNotEmpty(dateFormat) && StringUtils.isNotNull(value)) {
cell.setCellValue(DateUtils.parseDateToStr(dateFormat, (Date) value));
} else if (StringUtils.isNotEmpty(readConverterExp) && StringUtils.isNotNull(value)) {
cell.setCellValue(convertByExp(Convert.toStr(value), readConverterExp, separator));
} else if (value instanceof BigDecimal && -1 != attr.scale()) {
cell.setCellValue((((BigDecimal) value).setScale(attr.scale(), attr.roundingMode())).toString());
} 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] + 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] + separator);
break;
}
}
} else {
if (itemArray[1].equals(propertyValue)) {
return itemArray[0];
}
}
}
return StringUtils.stripEnd(propertyString.toString(), separator);
}
/**
* 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) {
}
statistics.put(index, statistics.get(index) + temp);
}
}
/**
* 创建统计行
*/
public void addStatisticsRow() {
if (statistics.size() > 0) {
Cell cell = null;
Row row = sheet.createRow(sheet.getLastRowNum() + 1);
Set<Integer> keys = statistics.keySet();
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();
}
}
/**
* 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.indexOf(".") > -1) {
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 = new ArrayList<Object[]>();
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)) {
putToField(field, field.getAnnotation(Excel.class));
}
// 多注解
if (field.isAnnotationPresent(Excels.class)) {
Excels attrs = field.getAnnotation(Excels.class);
Excel[] excels = attrs.value();
for (Excel excel : excels) {
putToField(field, excel);
}
}
}
this.fields = this.fields.stream().sorted(Comparator.comparing(objects -> ((Excel) objects[1]).sort())).collect(Collectors.toList());
this.maxHeight = getRowHeight();
}
/**
* 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 = maxHeight > excel.height() ? maxHeight : excel.height();
}
return (short) (maxHeight * 20);
}
/**
* 放到字段集合中
*/
private void putToField(Field field, Excel attr) {
if (attr != null && (attr.type() == Type.ALL || attr.type() == type)) {
this.fields.add(new Object[]{field, attr});
}
}
/**
* 创建一个工作簿
*/
public void createWorkbook() {
this.wb = new SXSSFWorkbook(500);
}
/**
* 创建工作表
*
* @param sheetNo sheet数量
* @param index 序号
*/
public void createSheet(double sheetNo, int index) {
this.sheet = wb.createSheet();
this.styles = createStyles(wb);
// 设置工作表的名称.
if (sheetNo == 0) {
wb.setSheetName(index, sheetName);
} else {
wb.setSheetName(index, sheetName + index);
}
}
/**
* 创建工作表
*
* @param index 序号
*/
public void createSheetManySheet( int index) {
this.sheet = wb.createSheet();
this.styles = createStyles(wb);
wb.setSheetName(index, sheetName);
}
/**
* 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 row;
}
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;
}
}

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使用方式

@PreAuthorize("@ss.hasPermi('product:data:export')")
@Log(title = "标题", businessType = BusinessType.EXPORT)
@PostMapping("/export")
public void export(HttpServletResponse response, Data data) {
// 查询列表
List<ProductData> list1 = Service.selectDataList(data);
List<ProductData> list2 = Service.selectDataList(data);
// 创建Excel工作表
ExcelExp e1 = new ExcelExp("sheet1", list1, Data.class);
ExcelExp e2 = new ExcelExp("sheet2", list2, Data.class);
List<ExcelExp> sheet = new ArrayList<>();
sheet.add(e1);
sheet.add(e2);
ExcelUtilManySheet<List<ExcelExp>> utilManySheet = new ExcelUtilManySheet<>(sheet);
try {
utilManySheet.exportExcelManySheet(response, sheet);
} catch (IOException e) {
e.printStackTrace();
}
}

复制代码

这样就可以使用若依框架，创建多个sheet的Excel文件

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若依框架生成多个sheet的Excel方法

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