package com.example.server.ExportExcel.method;
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import cn.hutool.core.date.DateUtil;
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import com.example.server.ExportExcel.dto.ExprotExcelDto;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.poi.ss.usermodel.*;
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import org.apache.poi.xssf.streaming.SXSSFCell;
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import org.apache.poi.xssf.streaming.SXSSFRow;
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import org.apache.poi.xssf.streaming.SXSSFSheet;
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import org.apache.poi.xssf.streaming.SXSSFWorkbook;
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import javax.servlet.http.HttpServletResponse;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.lang.reflect.Method;
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import java.net.URLEncoder;
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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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public class ExcelExport {
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public static void getHSSFWorkbook(String filePath,
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List<ExprotExcelDto> dtos) throws IOException {
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// 创建一个SXSSFWorkbook，对应一个Excel文件
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SXSSFWorkbook wb = new SXSSFWorkbook();
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// 创建第一个工作表并填充数据
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for (ExprotExcelDto dto : dtos) {
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String[][] content = new String[dto.getDataList().size()][dto.getColumnDto().size()];
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if (dto.getDataList() != null) {
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for (int i = 0; i < dto.getDataList().size(); i++) {
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Object object = dto.getDataList().get(i);
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Class c1azz = object.getClass();
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for (int j = 0; j < dto.getColumnDto().size(); j++) {
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Method method = null;
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try {
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String fieldName = dto.getColumnDto().get(j).getColumnName();
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method = c1azz.getMethod("get" + StringUtils.capitalize(fieldName));
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Object value = method.invoke(object);
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String valueStr = "";
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if (value == null) {
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} else if (value instanceof Date) {
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SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
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valueStr = sdf.format(value);
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} else {
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valueStr = value.toString();
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}
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content[i][j] = valueStr;
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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}
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createSheetAndFillData(wb, dto, content);
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}
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try (FileOutputStream fileOut = new FileOutputStream(filePath)) {
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wb.write(fileOut);
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} catch (IOException e) {
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e.printStackTrace();
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} finally {
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try {
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wb.close();
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} catch (IOException e) {
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e.printStackTrace();
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}
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}
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}
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private static void createSheetAndFillData(SXSSFWorkbook wb, ExprotExcelDto data, String[][] content) {
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SXSSFSheet sheet = wb.createSheet(data.getSheetName());
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//sheet.setDefaultRowHeightInPoints(20);
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CellStyle titleStyle = wb.createCellStyle();
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//4.设置字体样式
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Font titleFont = wb.createFont();
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titleFont.setFontName("宋体");
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//titleFont.setFontHeight((short) 10);
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//titleFont.setItalic(true);
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//titleFont.setStrikeout(true);
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//titleFont.setColor((short) 111);
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//titleFont.setTypeOffset((short) 5);
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//titleFont.setUnderline((byte) 0000);
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titleFont.setBold(true);
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//titleFont.setFontHeightInPoints((short) 12);
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titleStyle.setBorderBottom(BorderStyle.THICK);
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titleStyle.setBorderLeft(BorderStyle.THIN);
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titleStyle.setBorderRight(BorderStyle.THIN);
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titleStyle.setBorderTop(BorderStyle.THIN);
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titleStyle.setAlignment(HorizontalAlignment.CENTER);
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titleStyle.setVerticalAlignment(VerticalAlignment.CENTER);
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titleStyle.setWrapText(true);
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titleStyle.setFont(titleFont);
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SXSSFCell cell = null;
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SXSSFRow titleRow = sheet.createRow(0);
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//titleRow.setHeightInPoints(40);
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// 循环输出标题行
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for (int i = 0; i < data.getColumnDto().size(); i++) {
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cell = titleRow.createCell(i);
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cell.setCellValue(data.getColumnDto().get(i).getColumnDesc());
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cell.setCellStyle(titleStyle);
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sheet.setColumnWidth(i, 5000);
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}
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CellStyle contentStyle = wb.createCellStyle();
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//4.设置字体样式
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Font contentFont = wb.createFont();
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contentFont.setFontName("宋体");
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contentFont.setBold(false);
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contentStyle.setBorderBottom(BorderStyle.THICK);
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contentStyle.setBorderLeft(BorderStyle.THIN);
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contentStyle.setBorderRight(BorderStyle.THIN);
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contentStyle.setBorderTop(BorderStyle.THIN);
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contentStyle.setAlignment(HorizontalAlignment.CENTER);
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contentStyle.setVerticalAlignment(VerticalAlignment.CENTER);
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contentStyle.setWrapText(true);
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contentStyle.setFont(contentFont);
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for (int j = 0; j < data.getColumnDto().size(); j++) {
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if (data.getColumnDto().get(j).getColumnWidth() != null && data.getColumnDto().get(j).getColumnWidth() != 0)
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sheet.setColumnWidth(j, data.getColumnDto().get(j).getColumnWidth() * 256);
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}
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for (int i = 0; i < content.length; i++) {
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SXSSFRow row = sheet.createRow(1 + i);
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for (int j = 0; j < content[i].length; j++) {
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cell = row.createCell(j);
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if (data.getColumnDto().get(j).getHorizontalAlignment() != null) {
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CellStyle contentStyle2 = wb.createCellStyle();
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contentStyle2.cloneStyleFrom(contentStyle);
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contentStyle2.setAlignment(data.getColumnDto().get(j).getHorizontalAlignment());
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cell.setCellStyle(contentStyle2);
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} else {
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cell.setCellStyle(contentStyle);
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}
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cell.setCellValue(content[i][j]);
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}
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}
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}
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}
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