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85 lines
2.8 KiB
85 lines
2.8 KiB
package com.zh.lingnuo.utils;
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import org.apache.poi.xssf.usermodel.*;
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import java.util.*;
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/**
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* 将List<Map<String,Object>> 类型数据导出到Excel文件
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*/
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public class ExcelExport {
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/**
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* src:定义下载的文件路径
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*
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* @param src
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*
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* @return
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*/
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public static XSSFWorkbook createExcel(LinkedHashMap<String, List<Map>> sheetList, String src) {
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// 定义一个新的工作簿
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XSSFWorkbook wb = new XSSFWorkbook();
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for (Map.Entry<String, List<Map>> entry : sheetList.entrySet()) {
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String sheetName = entry.getKey();
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List<Map> list = entry.getValue();
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if( list.size() == 0){
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continue;
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}
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// 创建一个Sheet页
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XSSFSheet sheet = wb.createSheet(sheetName);
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//设置行高
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sheet.setDefaultRowHeight((short) (2 * 256));
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//设置列宽
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sheet.setColumnWidth(0, 4000);
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sheet.setColumnWidth(1, 4000);
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sheet.setColumnWidth(2, 4000);
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XSSFFont font = wb.createFont();
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font.setFontName("宋体");
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font.setFontHeightInPoints((short) 16);
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//获得表格第一行
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XSSFRow row = sheet.createRow(0);
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//根据需要给第一行每一列设置标题
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int rowCellIndex = 0;
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XSSFCell cell = row.createCell(rowCellIndex);
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if (null == list || list.size() == 0) {
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return wb;
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}
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Set<Object> keys = list.get(0).keySet();
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Object[] keysArray = keys.toArray();
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for (Object key : keys) {
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cell = row.createCell(rowCellIndex);
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cell.setCellValue(key.toString());
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rowCellIndex++;
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}
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XSSFRow rows;
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XSSFCell cells;
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//循环拿到的数据给所有行每一列设置对应的值
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for (int i = 0; i < list.size(); i++) {
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// 在这个sheet页里创建一行
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rows = sheet.createRow(i + 1);
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// 该行创建一个单元格,在该单元格里设置值
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rowCellIndex = 0;
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for (Object s : keysArray) {
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cells = rows.createCell(rowCellIndex);
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cells.setCellValue(null == list.get(i).get(s) ? "" : list.get(i).get(s).toString());
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rowCellIndex++;
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}
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}
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}
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// try {
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// File file = new File(src);
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// FileOutputStream fileOutputStream = new FileOutputStream(file);
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// wb.write(fileOutputStream);
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// wb.close();
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// fileOutputStream.close();
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// } catch (IOException e) {
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// e.printStackTrace();
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// }
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return wb;
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}
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}
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