Java tutorial
/** * Copyright © 2012-2013 <a href="https://github.com/thinkgem/jeesite">JeeSite</a> All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); */ package me.utils.excel; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.lang.reflect.Field; import java.lang.reflect.Method; import java.util.Collections; import java.util.Comparator; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletResponse; import me.entity.Zbx; import org.apache.commons.lang3.StringUtils; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.CellStyle; import org.apache.poi.ss.usermodel.Comment; import org.apache.poi.ss.usermodel.DataFormat; import org.apache.poi.ss.usermodel.Font; import org.apache.poi.ss.usermodel.IndexedColors; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.xssf.streaming.SXSSFWorkbook; import org.apache.poi.xssf.usermodel.XSSFClientAnchor; import org.apache.poi.xssf.usermodel.XSSFRichTextString; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springside.modules.utils.Encodes; import org.springside.modules.utils.Reflections; import com.google.common.collect.Lists; /** * ExcelXLSX????? @see org.apache.poi.ss.SpreadsheetVersion * @author wj * @version 2014-10-17 */ public class ExportExcelme { private static Logger log = LoggerFactory.getLogger(ExportExcelme.class); /** * */ private SXSSFWorkbook wb; /** * */ private Sheet sheet; /** * ? */ private Map<String, CellStyle> styles; /** * ?? */ private int rownum; /** * Object[]{ ExcelField, Field/Method } */ List<Object[]> annotationList = Lists.newArrayList(); List<String> properyNames = Lists.newArrayList(); /** * * @param title ? * @param cls annotation.ExportField? */ public ExportExcelme(String title, List<Zbx> zbxList) { this(title, zbxList, 1); } /** * * @param title ? * @param cls annotation.ExportField? * @param type 1:?2? * @param groups */ public ExportExcelme(String title, List<Zbx> zbxList, int type) { // Initialize List<String> headerList = Lists.newArrayList(); for (Zbx zbx : zbxList) { String t = zbx.getPropertyText(); // if (type == 1) { } //propery header headerList.add(t); properyNames.add(zbx.getPropertyName()); } initialize(title, headerList); } /** * * @param title ? * @param headers */ public ExportExcelme(String title, String[] headers) { initialize(title, Lists.newArrayList(headers)); } /** * ? * @param title ? * @param headerList */ private void initialize(String title, List<String> headerList) { this.wb = new SXSSFWorkbook(500); this.sheet = wb.createSheet("Export"); this.styles = createStyles(wb); // Create title if (StringUtils.isNotBlank(title)) { Row titleRow = sheet.createRow(rownum++); titleRow.setHeightInPoints(30); Cell titleCell = titleRow.createCell(0); titleCell.setCellStyle(styles.get("title")); titleCell.setCellValue(title); sheet.addMergedRegion(new CellRangeAddress(titleRow.getRowNum(), titleRow.getRowNum(), titleRow.getRowNum(), headerList.size() - 1)); } // Create header if (headerList == null) { throw new RuntimeException("headerList not null!"); } Row headerRow = sheet.createRow(rownum++); headerRow.setHeightInPoints(16); for (int i = 0; i < headerList.size(); i++) { Cell cell = headerRow.createCell(i); cell.setCellStyle(styles.get("header")); String[] ss = StringUtils.split(headerList.get(i), "**", 2); if (ss.length == 2) { cell.setCellValue(ss[0]); Comment comment = this.sheet.createDrawingPatriarch() .createCellComment(new XSSFClientAnchor(0, 0, 0, 0, (short) 3, 3, (short) 5, 6)); comment.setString(new XSSFRichTextString(ss[1])); cell.setCellComment(comment); } else { cell.setCellValue(headerList.get(i)); } sheet.autoSizeColumn(i); } for (int i = 0; i < headerList.size(); i++) { int colWidth = sheet.getColumnWidth(i) * 2; sheet.setColumnWidth(i, colWidth < 3000 ? 3000 : colWidth); } log.debug("Initialize success."); } /** * ? * @param wb * @return ? */ private Map<String, CellStyle> createStyles(Workbook wb) { Map<String, CellStyle> styles = new HashMap<String, CellStyle>(); CellStyle style = wb.createCellStyle(); style.setAlignment(CellStyle.ALIGN_CENTER); style.setVerticalAlignment(CellStyle.VERTICAL_CENTER); Font titleFont = wb.createFont(); titleFont.setFontName("Arial"); titleFont.setFontHeightInPoints((short) 16); titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD); style.setFont(titleFont); styles.put("title", style); style = wb.createCellStyle(); style.setVerticalAlignment(CellStyle.VERTICAL_CENTER); style.setBorderRight(CellStyle.BORDER_THIN); style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setBorderLeft(CellStyle.BORDER_THIN); style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setBorderTop(CellStyle.BORDER_THIN); style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setBorderBottom(CellStyle.BORDER_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(CellStyle.ALIGN_LEFT); styles.put("data1", style); style = wb.createCellStyle(); style.cloneStyleFrom(styles.get("data")); style.setAlignment(CellStyle.ALIGN_CENTER); styles.put("data2", style); style = wb.createCellStyle(); style.cloneStyleFrom(styles.get("data")); style.setAlignment(CellStyle.ALIGN_RIGHT); styles.put("data3", style); style = wb.createCellStyle(); style.cloneStyleFrom(styles.get("data")); // style.setWrapText(true); style.setAlignment(CellStyle.ALIGN_CENTER); style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setFillPattern(CellStyle.SOLID_FOREGROUND); Font headerFont = wb.createFont(); headerFont.setFontName("Arial"); headerFont.setFontHeightInPoints((short) 10); headerFont.setBoldweight(Font.BOLDWEIGHT_BOLD); headerFont.setColor(IndexedColors.WHITE.getIndex()); style.setFont(headerFont); styles.put("header", style); return styles; } /** * * @return */ public Row addRow() { return sheet.createRow(rownum++); } /** * ? * @param row * @param column ? * @param val * @return ? */ public Cell addCell(Row row, int column, Object val) { return this.addCell(row, column, val, 0); } /** * ? * @param row * @param column ? * @param val * @param align ??1?23?? * @return ? */ public Cell addCell(Row row, int column, Object val, int align) { Cell cell = row.createCell(column); CellStyle style = styles.get("data" + (align >= 1 && align <= 3 ? align : "")); try { if (val == null) { cell.setCellValue(""); } else if (val instanceof String) { cell.setCellValue((String) val); } else if (val instanceof Integer) { cell.setCellValue((Integer) val); } else if (val instanceof Long) { cell.setCellValue((Long) val); } else if (val instanceof Double) { cell.setCellValue((Double) val); } else if (val instanceof Float) { cell.setCellValue((Float) val); } else if (val instanceof Date) { DataFormat format = wb.createDataFormat(); style.setDataFormat(format.getFormat("yyyy-MM-dd")); cell.setCellValue((Date) val); } else { } } catch (Exception ex) { log.info("Set cell value [" + row.getRowNum() + "," + column + "] error: " + ex.toString()); cell.setCellValue(val.toString()); } cell.setCellStyle(style); return cell; } /** * ?annotation.ExportField? * @return list ? */ public <E> ExportExcelme setDataList(List<E> list, List<String> propertyNames) { for (E e : list) { int colunm = 0; Row row = this.addRow(); StringBuilder sb = new StringBuilder(); for (String properyName : properyNames) { Object val = null; // Get entity value try { val = Reflections.invokeGetter(e, properyName); } catch (Exception ex) { // Failure to ignore log.info(ex.toString()); val = ""; } this.addCell(row, colunm++, val, 0);//? sb.append(val + ", "); } log.debug("Write success: [" + row.getRowNum() + "] " + sb.toString()); } return this; } /** * ?? * @param os ?? */ public ExportExcelme write(OutputStream os) throws IOException { wb.write(os); return this; } /** * * @param fileName ?? */ public ExportExcelme write(HttpServletResponse response, String fileName) throws IOException { response.reset(); response.setContentType("application/octet-stream; charset=utf-8"); response.setHeader("Content-Disposition", "attachment; filename=" + Encodes.urlEncode(fileName)); write(response.getOutputStream()); return this; } /** * * @param fileName ?? */ public ExportExcelme writeFile(String name) throws FileNotFoundException, IOException { FileOutputStream os = new FileOutputStream(name); this.write(os); return this; } /** * ? */ public ExportExcelme dispose() { wb.dispose(); return this; } // /** // * // */ // public static void main(String[] args) throws Throwable { // // List<String> headerList = Lists.newArrayList(); // for (int i = 1; i <= 10; i++) { // headerList.add(""+i); // } // // List<String> dataRowList = Lists.newArrayList(); // for (int i = 1; i <= headerList.size(); i++) { // dataRowList.add("?"+i); // } // // List<List<String>> dataList = Lists.newArrayList(); // for (int i = 1; i <=1000000; i++) { // dataList.add(dataRowList); // } // // ExportExcel ee = new ExportExcel("", headerList); // // for (int i = 0; i < dataList.size(); i++) { // Row row = ee.addRow(); // for (int j = 0; j < dataList.get(i).size(); j++) { // ee.addCell(row, j, dataList.get(i).get(j)); // } // } // // ee.writeFile("target/export.xlsx"); // // ee.dispose(); // // log.debug("Export success."); // // } }