Question

import org.jeecgframework.poi.excel.excelexportutil的exportexcel导出怎样设置

Answer 1

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package org.jeecgframework.poi.util;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.util.CellRangeAddress;
import org.jeecgframework.poi.excel.entity.params.MergeEntity;

/**
* 纵向合并单元格工具类
* @author JueYue
* @date 2015年6月21日 上午11:21:40
*/
public final class PoiMergeCellUtil {

private PoiMergeCellUtil() {
}

/**
* 纵向合并相同内容的单元格
*
* @param sheet
* @param mergeMap key--列,value--依赖的列,没有传空
* @param startRow 开始行
*/
public static void mergeCells(Sheet sheet, Map mergeMap, int startRow) {
Map mergeDataMap = new HashMap();
if (mergeMap.size() == 0) {
return;
}
Row row;
Set sets = mergeMap.keySet();
String text;
for (int i = startRow; i <= sheet.getLastRowNum(); i++) {
row = sheet.getRow(i);
for (Integer index : sets) {
if (row.getCell(index) == null) {
mergeDataMap.get(index).setEndRow(i);
} else {
text = row.getCell(index).getStringCellValue();
if (StringUtils.isNotEmpty(text)) {
hanlderMergeCells(index, i, text, mergeDataMap, sheet, row.getCell(index),
mergeMap.get(index));
} else {
mergeCellOrContinue(index, mergeDataMap, sheet);
}
}
}
}
if (mergeDataMap.size() > 0) {
for (Integer index : mergeDataMap.keySet()) {
sheet.addMergedRegion(new CellRangeAddress(mergeDataMap.get(index).getStartRow(),
mergeDataMap.get(index).getEndRow(), index, index));
}
}

}

/**
* 处理合并单元格
*
* @param index
* @param rowNum
* @param text
* @param mergeDataMap
* @param sheet
* @param cell
* @param delys
*/
private static void hanlderMergeCells(Integer index, int rowNum, String text,
Map mergeDataMap, Sheet sheet,
Cell cell, int[] delys) {
if (mergeDataMap.containsKey(index)) {
if (checkIsEqualByCellContents(mergeDataMap.get(index), text, cell, delys, rowNum)) {
mergeDataMap.get(index).setEndRow(rowNum);
} else {
sheet.addMergedRegion(new CellRangeAddress(mergeDataMap.get(index).getStartRow(),
mergeDataMap.get(index).getEndRow(), index, index));
mergeDataMap.put(index, createMergeEntity(text, rowNum, cell, delys));
}
} else {
mergeDataMap.put(index, createMergeEntity(text, rowNum, cell, delys));
}
}

/**
* 字符为空的情况下判断
*
* @param index
* @param mergeDataMap
* @param sheet
*/
private static void mergeCellOrContinue(Integer index, Map mergeDataMap,
Sheet sheet) {
if (mergeDataMap.containsKey(index)
&& mergeDataMap.get(index).getEndRow() != mergeDataMap.get(index).getStartRow()) {
sheet.addMergedRegion(new CellRangeAddress(mergeDataMap.get(index).getStartRow(),
mergeDataMap.get(index).getEndRow(), index, index));
mergeDataMap.remove(index);
}
}

private static MergeEntity createMergeEntity(String text, int rowNum, Cell cell, int[] delys) {
MergeEntity mergeEntity = new MergeEntity(text, rowNum, rowNum);
List list = new ArrayList(delys.length);
mergeEntity.setRelyList(list);
for (int i = 0; i < delys.length; i++) {
list.add(getCellNotNullText(cell, delys[i], rowNum));
}
return mergeEntity;
}

private static boolean checkIsEqualByCellContents(MergeEntity mergeEntity, String text,
Cell cell, int[] delys, int rowNum) {
// 没有依赖关系
if (delys == null || delys.length == 0) {
return mergeEntity.getText().equals(text);
}
// 存在依赖关系
if (mergeEntity.getText().equals(text)) {
for (int i = 0; i < delys.length; i++) {
if (!getCellNotNullText(cell, delys[i], rowNum).equals(
mergeEntity.getRelyList().get(i))) {
return false;
}
}
return true;
}
return false;
}

/**
* 获取一个单元格的值,确保这个单元格必须有值,不然向上查询
*
* @param cell
* @param index
* @param rowNum
* @return
*/
private static String getCellNotNullText(Cell cell, int index, int rowNum) {
String temp = cell.getRow().getCell(index).getStringCellValue();
while (StringUtils.isEmpty(temp)) {
temp = cell.getRow().getSheet().getRow(--rowNum).getCell(index).getStringCellValue();
}
return temp;
}

}