【java】：生成excel

//生成报表公用方法

//excelName： 生成的文件名

//list：时间/日期/描述

//listSelectFiled：  标题

//showContent : 　　文件内容bean

//生成报表公用方法
    public String createExcelFile(String excelName,List<String[]> listSelectField,String[] fields,List<String[]> showContent){

        HSSFWorkbook wb = new HSSFWorkbook();
        HSSFSheet sheet = wb.createSheet();
        HSSFCellStyle setBorder = wb.createCellStyle();
        //设置背景颜色
        //setBorder.setFillBackgroundColor((short)13);
        //setBorder.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
        //设置边框
        setBorder.setBorderBottom(HSSFCellStyle.BORDER_THIN);
        setBorder.setBorderLeft(HSSFCellStyle.BORDER_THIN);
        setBorder.setBorderTop(HSSFCellStyle.BORDER_THIN);
        setBorder.setBorderRight(HSSFCellStyle.BORDER_THIN);
        //设置居中
        setBorder.setAlignment(HSSFCellStyle.ALIGN_CENTER);//居中
        //设置字体
        HSSFFont font = wb.createFont();
        font.setFontName("黑体");
        font.setFontHeightInPoints((short)16);//设置字体大小

        HSSFFont font3 = wb.createFont();
        font3.setFontName("宋体");
        //font2.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//粗体显示
        font3.setFontHeightInPoints((short)14);//设置字体大小

        HSSFFont font2 = wb.createFont();
        font2.setFontName("宋体");
        //font2.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//粗体显示
        font2.setFontHeightInPoints((short)12);//设置字体大小

        setBorder.setFont(font); //选择需要的字体
        //设置列宽
        for (int i = 0; i < fields.length; i++) {
            sheet.setColumnWidth((short)i, (short)4000);
        }
        //所有内容居中显示的 样式（内容部分）
        HSSFCellStyle cellstyle = wb.createCellStyle();
        cellstyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);//居中
        cellstyle.setFont(font2);

        HSSFCellStyle selestyle = wb.createCellStyle();
        selestyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);//居中
        selestyle.setFont(font2);

        //合并单元格
        Region region = new Region(0,(short)0,0,(short)14);
        sheet.addMergedRegion(region);

        //第一行标题
        HSSFRow row1 = sheet.createRow(0);
        row1.setHeight((short)500);
        HSSFCell celltitle = row1.createCell((short)0);
        celltitle.setCellType(HSSFCell.CELL_TYPE_STRING);
        celltitle.setCellValue(excelName);
        celltitle.setCellStyle(setBorder);
        //合并单元格
        int ce = 0;
        for (int i = 0; i < listSelectField.size(); i++) {
            sheet.addMergedRegion(new Region(1,(short)ce,1,(short)(++ce)));
            ce+=2;
        }
        //第二行查询条件
        ce=0;
        HSSFRow row2 = sheet.createRow(1);
        row2.setHeight((short)300);
        for (int i = 0; i < listSelectField.size(); i++) {
            HSSFCell selectfields1 = row2.createCell((short)ce);
            selectfields1.setCellType(HSSFCell.CELL_TYPE_STRING);
            selectfields1.setCellValue(listSelectField.get(i)[0]+":"+listSelectField.get(i)[1]);
            selectfields1.setCellStyle(cellstyle);
            ce+=3;
        }
        //需要显示的字段名称
        HSSFRow row3 = sheet.createRow(2);
        int index= 0;
        for(String str : fields){
            HSSFCell cell = row3.createCell((short)index);
            cell.setCellType(HSSFCell.CELL_TYPE_STRING);
            cell.setCellValue(str);
            cell.setCellStyle(cellstyle);
            index++;
        }

        //需要显示的内容
        for (int i = 0; i < showContent.size(); i++) {
            HSSFRow row = sheet.createRow(i+3);
            String[] content = showContent.get(i);
            for(int j = 0;j<content.length;j++){
                HSSFCell cell = row.createCell((short)j);
                cell.setCellType(HSSFCell.CELL_TYPE_STRING);
                cell.setCellValue(content[j]);
                cell.setCellStyle(cellstyle);
            }
        }

        String destFileName = StringUtil.getNowDateFormat(null);
        String fileName = excelName+"("+destFileName+").xls";
        System.out.println("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"+fileName);
        try {
            String saveurl = PathManager.getWEBINFPath()+java.io.File.separator+".."+java.io.File.separator+"ucstar_plugins"+java.io.File.separator+"ucstarwebcall"+java.io.File.separator+"reportfile"+java.io.File.separator+"";
            File fileurl = new File(saveurl);
            if(!fileurl.exists()){
                fileurl.mkdirs();
            }
            File f = new File(saveurl+java.io.File.separator+fileName);
            System.out.println("<<<<<<<<<<<<<<<<<<<<<<<<<<<<"+saveurl+java.io.File.separator+fileName);
            f.createNewFile();
            FileOutputStream fos = new FileOutputStream(f);
            wb.write(fos);
            fos.close();

            Log.console(">>>>>>>生成Excel成功！");
        } catch (Exception e) {
            Log.console(">>>>>>>生成Excel失败："+e.getMessage());
            return "";
        }
        return fileName;
    }

}