项目不兼容别人开源的轮子 写了个读取导入
唉 还要造轮子 简直了，，，老项目已经改不动了 只能造一个差不多的轮子安上跑吧 导出 导出 导出
import org.apache.poi.hssf.usermodel.*; import org.apache.poi.hssf.util.HSSFColor; import org.apache.poi.ss.usermodel.IndexedColors; import org.apache.poi.ss.util.CellRangeAddress;
import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;
import java.io.FileOutputStream; import java.io.IOException; import java.io.OutputStream; import java.util.ArrayList; import java.util.List;
public class ExportExcelUtil {
/** * 显示的导出表的标题 */ private String title;
/** * 导出表的列名 */ private String[] columnName;
/** * 需要导出的数据集合 */ private List<Object[]> dataList = new ArrayList<Object[]>();
/** * 输入流对象 */ private HttpServletRequest request;
/** * 输出流对象 */ private HttpServletResponse response;
/** * * @param title * @param columnName * @param dataList * @param request * @param response * @description 构造方法，传入要导出的数据 */ public ExportExcelUtil(String title, String[] columnName, List<Object[]> dataList) { this.dataList = dataList; this.columnName = columnName; this.title = title; }
/** * @description 导出数据到excel */ public void export() throws Exception {
try { HSSFWorkbook workbook = new HSSFWorkbook(); // 创建工作簿对象 HSSFSheet sheet = workbook.createSheet(title); // 创建工作表
// 产生表格标题行 HSSFRow rowm = sheet.createRow(0); HSSFCell cellTiltle = rowm.createCell(0);
//设置标题和单元格样式 HSSFCellStyle columnTopStyle = this.getColumnTopStyle(workbook); //获取列头样式对象 HSSFCellStyle style = this.getStyle(workbook); //单元格样式对象
//合并单元格 sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, (columnName.length - 1))); cellTiltle.setCellStyle(columnTopStyle); cellTiltle.setCellValue(title);
// 定义所需列数 int columnNum = columnName.length; HSSFRow rowRowName = sheet.createRow(2); // 在索引2的位置创建行(最顶端的行开始的第二行)
// 将列头设置到sheet的单元格中 for (int n = 0; n < columnNum; n++) { HSSFCell cellRowName = rowRowName.createCell(n); //创建列头对应个数的单元格 cellRowName.setCellType(HSSFCell.CELL_TYPE_STRING); //设置列头单元格的数据类型 HSSFRichTextString text = new HSSFRichTextString(columnName[n]); cellRowName.setCellValue(text); //设置列头单元格的值 cellRowName.setCellStyle(columnTopStyle); //设置列头单元格样式 }
//将查询出的数据设置到sheet对应的单元格中 for (int i = 0; i < dataList.size(); i++) { Object[] obj = dataList.get(i);//遍历每个对象 HSSFRow row = sheet.createRow(i + 3);//创建所需的行数 for (int j = 0; j < obj.length; j++) { HSSFCell cell = null; //设置单元格的数据类型 //第一列为数字类型并设置单元格的值 if (j == 0) { cell = row.createCell(j, HSSFCell.CELL_TYPE_NUMERIC); cell.setCellValue(i + 1); } else { //其他列为字符串类型并设置单元格的值 cell = row.createCell(j, HSSFCell.CELL_TYPE_STRING); if (!"".equals(obj[j]) && obj[j] != null) { cell.setCellValue(obj[j].toString()); } } cell.setCellStyle(style); //设置单元格样式 } }
//让列宽随着导出的列长自动适应 for (int colNum = 0; colNum < columnNum; colNum++) { int columnWidth = sheet.getColumnWidth(colNum) / 256; for (int rowNum = 0; rowNum < sheet.getLastRowNum(); rowNum++) { HSSFRow currentRow; //当前行未被使用过 if (sheet.getRow(rowNum) == null) { currentRow = sheet.createRow(rowNum); } else { currentRow = sheet.getRow(rowNum); } if (currentRow.getCell(colNum) != null) { //取得当前的单元格 HSSFCell currentCell = currentRow.getCell(colNum); //如果当前单元格类型为字符串 if (currentCell.getCellType() == HSSFCell.CELL_TYPE_STRING) { int length = currentCell.getStringCellValue().getBytes().length; if (columnWidth < length) { //将单元格里面值大小作为列宽度 columnWidth = length; } } } } //再根据不同列单独做下处理 if (colNum == 0) { sheet.setColumnWidth(colNum, (columnWidth - 2) * 256); } else { sheet.setColumnWidth(colNum, (columnWidth + 4) * 256); } }
if (workbook != null) { try { String fileName = "D://downexcel//" + String.valueOf(System.currentTimeMillis()).substring(4, 13) + ".xls"; OutputStream out1 = new FileOutputStream(fileName); workbook.write(out1); } catch (IOException e) { e.printStackTrace(); } }
} catch (Exception e) { e.printStackTrace(); } }
/** * @description 标题行的单元格样式 */ public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) {
// 设置字体 HSSFFont font = workbook.createFont(); //设置字体大小 font.setFontHeightInPoints((short) 11); //字体加粗 font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); //设置字体名字 font.setFontName("Courier New"); //设置样式; HSSFCellStyle style = workbook.createCellStyle(); style.setFillForegroundColor(IndexedColors.BLUE.getIndex()); //设置底边框; style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //设置底边框颜色; style.setBottomBorderColor(HSSFColor.BLACK.index); //设置左边框; style.setBorderLeft(HSSFCellStyle.BORDER_THIN); //设置左边框颜色; style.setLeftBorderColor(HSSFColor.BLACK.index); //设置右边框; style.setBorderRight(HSSFCellStyle.BORDER_THIN); //设置右边框颜色; style.setRightBorderColor(HSSFColor.BLACK.index); //设置顶边框; style.setBorderTop(HSSFCellStyle.BORDER_THIN); //设置顶边框颜色; style.setTopBorderColor(HSSFColor.BLACK.index); //在样式用应用设置的字体; style.setFont(font); //设置自动换行; style.setWrapText(false); //设置水平对齐的样式为居中对齐; style.setAlignment(HSSFCellStyle.ALIGN_CENTER); //设置垂直对齐的样式为居中对齐; style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); return style; }
/** * @param * @description 列数据信息单元格样式 */ public HSSFCellStyle getStyle(HSSFWorkbook workbook) { // 设置字体 HSSFFont font = workbook.createFont(); //设置字体大小 //font.setFontHeightInPoints((short)10); //字体加粗 //font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); //设置字体名字 font.setFontName("Courier New"); //设置样式; HSSFCellStyle style = workbook.createCellStyle(); //设置底边框; style.setBorderBottom(HSSFCellStyle.BORDER_THIN); //设置底边框颜色; style.setBottomBorderColor(HSSFColor.BLACK.index); //设置左边框; style.setBorderLeft(HSSFCellStyle.BORDER_THIN); //设置左边框颜色; style.setLeftBorderColor(HSSFColor.BLACK.index); //设置右边框; style.setBorderRight(HSSFCellStyle.BORDER_THIN); //设置右边框颜色; style.setRightBorderColor(HSSFColor.BLACK.index); //设置顶边框; style.setBorderTop(HSSFCellStyle.BORDER_THIN); //设置顶边框颜色; style.setTopBorderColor(HSSFColor.BLACK.index); //在样式用应用设置的字体; style.setFont(font); //设置自动换行; style.setWrapText(false); //设置水平对齐的样式为居中对齐; style.setAlignment(HSSFCellStyle.ALIGN_CENTER); //设置垂直对齐的样式为居中对齐; style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER); return style; } public static void main(String[] args) { String title = "单据导出"; String[] columnName = new String[]{"序号","num1","num2"}; List<Object[]> dataList = new ArrayList<Object[]>(); Object[] objs; for (int i = 0; i <5; i++) { objs = new Object[columnName.length]; objs[0] = i; objs[1] = "1"; objs[2] = "2"; dataList.add(objs); } //实例化工具类 ExportExcelUtil ex = new ExportExcelUtil(title, columnName, dataList); try { //导出excel ex.export(); } catch (Exception e) { e.printStackTrace(); } } }
