北大青鸟OA办公自动化系统

package com.lanou.util; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.ByteArrayInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.math.BigDecimal; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Iterator; import java.util.LinkedHashMap; import java.util.Map; import javax.servlet.ServletOutputStream; import javax.servlet.http.HttpServletResponse; import org.apache.commons.io.output.ByteArrayOutputStream; import org.apache.poi.hpsf.SummaryInformation; import org.apache.poi.hssf.usermodel.HSSFCell; import org.apache.poi.hssf.usermodel.HSSFCellStyle; import org.apache.poi.hssf.usermodel.HSSFClientAnchor; import org.apache.poi.hssf.usermodel.HSSFComment; import org.apache.poi.hssf.usermodel.HSSFFont; import org.apache.poi.hssf.usermodel.HSSFPatriarch; import org.apache.poi.hssf.usermodel.HSSFRichTextString; import org.apache.poi.hssf.usermodel.HSSFRow; import org.apache.poi.hssf.usermodel.HSSFSheet; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.hssf.util.CellRangeAddress; import org.apache.poi.ss.usermodel.CellStyle; import org.apache.poi.ss.usermodel.Font; import org.apache.poi.xssf.streaming.SXSSFCell; import org.apache.poi.xssf.streaming.SXSSFRow; import org.apache.poi.xssf.streaming.SXSSFSheet; import org.apache.poi.xssf.streaming.SXSSFWorkbook; import com.alibaba.fastjson.JSONArray; import com.alibaba.fastjson.JSONObject; import com.lanou.bean.Student; public class ExcelUtil{ public static String NO_DEFINE = "no_define";//未定义的字段 public static String DEFAULT_DATE_PATTERN="yyyy年MM月dd日";//默认日期格式 public static int DEFAULT_COLOUMN_WIDTH = 17; /** * 导出Excel 97(.xls)格式 ，少量数据 * @param title 标题行 * @param headMap 属性-列名 * @param jsonArray 数据集 * @param datePattern 日期格式，null则用默认日期格式 * @param colWidth 列宽 默认 至少17个字节 * @param out 输出流 */ public static void exportExcel(String title,Map<String, String> headMap,JSONArray jsonArray,String datePattern,int colWidth, OutputStream out) { if(datePattern==null) datePattern = DEFAULT_DATE_PATTERN; // 声明一个工作薄 HSSFWorkbook workbook = new HSSFWorkbook(); workbook.createInformationProperties(); workbook.getDocumentSummaryInformation().setCompany("*****公司"); SummaryInformation si = workbook.getSummaryInformation(); si.setAuthor("JACK"); //填加xls文件作者信息 si.setApplicationName("导出程序"); //填加xls文件创建程序信息 si.setLastAuthor("最后保存者信息"); //填加xls文件最后保存者信息 si.setComments("JACK is a programmer!"); //填加xls文件作者信息 si.setTitle("POI导出Excel"); //填加xls文件标题信息 si.setSubject("POI导出Excel");//填加文件主题信息 si.setCreateDateTime(new Date()); //表头样式 HSSFCellStyle titleStyle = workbook.createCellStyle(); titleStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); HSSFFont titleFont = workbook.createFont(); titleFont.setFontHeightInPoints((short) 20); titleFont.setBoldweight((short) 700); titleStyle.setFont(titleFont); // 列头样式 HSSFCellStyle headerStyle = workbook.createCellStyle(); headerStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); headerStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); headerStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN); headerStyle.setBorderRight(HSSFCellStyle.BORDER_THIN); headerStyle.setBorderTop(HSSFCellStyle.BORDER_THIN); headerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); HSSFFont headerFont = workbook.createFont(); headerFont.setFontHeightInPoints((short) 12); headerFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); headerStyle.setFont(headerFont); // 单元格样式 HSSFCellStyle cellStyle = workbook.createCellStyle(); cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND); cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN); cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN); cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN); cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); HSSFFont cellFont = workbook.createFont(); cellFont.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL); cellStyle.setFont(cellFont); // 生成一个(带标题)表格 HSSFSheet sheet = workbook.createSheet(); // 声明一个画图的顶级管理器 HSSFPatriarch patriarch = sheet.createDrawingPatriarch(); // 定义注释的大小和位置,详见文档 HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short) 4, 2, (short) 6, 5)); // 设置注释内容 comment.setString(new HSSFRichTextString("可以在POI中添加注释！")); // 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容. comment.setAuthor("JACK"); //设置列宽 int minBytes = colWidth<DEFAULT_COLOUMN_WIDTH?DEFAULT_COLOUMN_WIDTH:colWidth;//至少字节数 int[] arrColWidth = new int[headMap.size()]; // 产生表格标题行,以及设置列宽 String[] properties = new String[headMap.size()]; String[] headers = new String[headMap.size()]; int ii = 0; for (Iterator<String> iter = headMap.keySet().iterator(); iter .hasNext();) { String fieldName = iter.next(); properties[ii] = fieldName; headers[ii] = fieldName; int bytes = fieldName.getBytes().length; arrColWidth[ii] = bytes < minBytes ? minBytes : bytes; sheet.setColumnWidth(ii,arrColWidth[ii]*256); ii++; } // 遍历集合数据，产生数据行 int rowIndex = 0; for (Object obj : jsonArray) { if(rowIndex == 65535 || rowIndex == 0){ if ( rowIndex != 0 ) sheet = workbook.createSheet();//如果数据超过了，则在第二页显示 HSSFRow titleRow = sheet.createRow(0);//表头 rowIndex=0 titleRow.createCell(0).setCellValue(title); titleRow.getCell(0).setCellStyle(titleStyle); sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, headMap.size() - 1)); HSSFRow headerRow = sheet.createRow(1); //列头 rowIndex =1 for(int i=0;i<headers.length;i++) { headerRow.createCell(i).setCellValue(headers[i]); headerRow.getCell(i).setCellStyle(headerStyle); } rowIndex = 2;//数据内容从 rowIndex=2开始 } JSONObject jo = (JSONObject) JSONObject.toJSON(obj); HSSFRow dataRow = sheet.createRow(rowIndex); for (int i = 0; i < properties.length; i++) { HSSFCell newCell = dataRow.createCell(i); Object o = jo.get(properties[i]); String cellValue = ""; if(o==null) cellValue = ""; else if(o instanceof Date) cellValue = new SimpleDateFormat(datePattern).format(o); else cellValue = o.toString(); newCell.setCellValue(cellValue); newCell.setCellStyle(cellStyle); }