106 lines
3.8 KiB
Plaintext
106 lines
3.8 KiB
Plaintext
package com.sercurityControl.proteam.util;
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import org.apache.poi.ss.usermodel.*;
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import org.apache.poi.xssf.usermodel.XSSFWorkbook;
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import java.beans.PropertyDescriptor;
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import java.lang.reflect.Field;
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import java.text.DateFormat;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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import java.util.List;
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/**
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* @author bonus
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* @data 2023/3/10 10:02
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* @description 文件导出
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*/
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public class ExcelUtil {
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public static <T> Workbook writeToExcelByList(String[] array, List<T> list, Class<T> clazz) {
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//创建工作薄
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Workbook wb = new XSSFWorkbook();
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//标题和页码
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CellStyle titleStyle = wb.createCellStyle();
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// 设置单元格对齐方式,水平居左
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titleStyle.setAlignment(HorizontalAlignment.CENTER);
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//单元格边框
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titleStyle.setBorderTop(BorderStyle.THIN);
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titleStyle.setBorderLeft(BorderStyle.THIN);
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titleStyle.setBorderRight(BorderStyle.THIN);
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titleStyle.setBorderBottom(BorderStyle.THIN);
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// 设置字体样式
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Font titleFont = wb.createFont();
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// 字体高度
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titleFont.setFontHeightInPoints((short) 12);
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// 字体样式
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titleFont.setFontName("黑体");
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titleStyle.setFont(titleFont);
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//创建sheet
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Sheet sheet = wb.createSheet("数据");
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// 自动设置宽度
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sheet.autoSizeColumn(0);
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// 在sheet中添加标题行// 行数从0开始
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Row row = sheet.createRow(0);
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for (int i = 0; i < array.length; i++) {
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Cell cell = row.createCell(i);
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cell.setCellValue(array[i]);
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cell.setCellStyle(titleStyle);
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}
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// 数据样式 因为标题和数据样式不同 需要分开设置 不然会覆盖
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CellStyle dataStyle = wb.createCellStyle();
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//单元格边框
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dataStyle.setBorderTop(BorderStyle.THIN);
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dataStyle.setBorderLeft(BorderStyle.THIN);
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dataStyle.setBorderRight(BorderStyle.THIN);
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dataStyle.setBorderBottom(BorderStyle.THIN);
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// 设置居中样式，水平居中
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dataStyle.setAlignment(HorizontalAlignment.CENTER);
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//数据从序号1开始
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try {
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int index = 1;
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Field[] fields = clazz.getDeclaredFields();
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for (T t : list) {
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// 默认的行数从0开始，为了统一格式设置从1开始，就是从excel的第二行开始
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row = sheet.createRow(index);
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int num = 0;
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for (Field field : fields) {
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// 默认的行数从0开始，为了统一格式设置从1开始，就是从excel的第二行开始
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// 为当前列赋值
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if (!field.isAccessible()) {
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field.setAccessible(true);
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}
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Object value = (new PropertyDescriptor(field.getName(), clazz)).getReadMethod().invoke(t);
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if (value != null) {
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Cell cell = row.createCell(num);
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setValue(cell, value);
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//设置数据的样式
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cell.setCellStyle(dataStyle);
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num++;
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}
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}
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index++;
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}
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} catch (Exception 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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* 设置cellValue
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* 这里可以根据value的类型，进行格式化，比如日期格式化
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*/
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private static void setValue(Cell cell, Object value) {
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DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
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if (value != null && !"".equals(value)) {
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if (value instanceof Date) {
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cell.setCellValue(dateFormat.format(value));
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} else {
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cell.setCellValue(value.toString());
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}
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}
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}
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}
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