JAVA 关于web页面下载导出Excel通用方法
最近整理导出Excel，这种情况是不存在实体类方式，只要按照这种数据格式编写，就可以出来效果了。
1.需要的的jar包：
poi-ooxml-3.9.jar
serlet.api.jar
缺少的包自己去下就可以，都是常用的包，这里就不一一写出来了
下面看代码：
公共的类：
package com.by; import org.apache.poi.hssf.usermodel.*; import org.apache.poi.hssf.util.HSSFColor; import org.apache.poi.ss.util.CellRangeAddress; 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; /** * 导出Excel公共方法 * * @author zhanghb * @version 1.0 */ public class CommonExcel { //显示的导出表的标题 private String title; //导出表的列名 private String[] rowName; //导出的文件名 private String fileName; private List<Object[]> dataList = new ArrayList<Object[]>(); private HttpServletResponse response; //构造方法，传入要导出的数据 public CommonExcel(String title, String[] rowName, List<Object[]> dataList, HttpServletResponse response, String fileName) { this.dataList = dataList; this.rowName = rowName; this.title = title; this.response = response; this.fileName = fileName; } /* * 导出数据 */ public void downloadExcel() 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); //sheet样式定义【getColumnTopStyle()/getStyle()均为自定义方法 - 在下面 - 可扩展】 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 sheet.addMergedRegion(new CellRangeAddress(0, 1, 0, (rowName.length - 1))); cellTiltle.setCellStyle(columnTopStyle); cellTiltle.setCellValue(title); // 定义所需列数 int columnNum = rowName.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(rowName[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 if (j == 0) { cell = row.createCell(j, HSSFCell.CELL_TYPE_NUMERIC); cell.setCellValue(i + 1); } else { cell = row.createCell(j, HSSFCell.CELL_TYPE_STRING); if (!"".equals(obj[j]) && obj[j] != null) { cell.setCellValue(obj[j].toString()); //设置单元格的值 } } 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) { HSSFCell currentCell = currentRow.getCell(colNum); if (currentCell.getCellType() == HSSFCell.CELL_TYPE_STRING) { int length = currentCell.getStringCellValue().getBytes().length; if (columnWidth < length) { columnWidth = length; } } } } if (colNum == 0) { sheet.setColumnWidth(colNum, (columnWidth - 2) * 256); } else { sheet.setColumnWidth(colNum, (columnWidth + 4) * 256); } } if (workbook != null) { try { if (response != null) { response.setContentType("application/vnd.ms-excel;charset=utf-8"); response.setHeader("Content-Disposition", "attachment;filename=\""+new String(fileName.getBytes("gb2312"),"ISO8859-1")); OutputStream out = response.getOutputStream(); workbook.write(out); out.close(); } else { FileOutputStream outputStream = new FileOutputStream("D:/"+fileName); workbook.write(outputStream); outputStream.close(); } } catch (IOException e) { e.printStackTrace(); } } } catch (Exception e) { e.printStackTrace(); } } /* * 列头单元格样式 */ public HSSFCellStyle getColumnTopStyle(HSSFWorkbook workbook) { // 设置字体 HSSFFont font = workbook.createFont(); //设置字体大小 font.setFontHeightInPoints((short) 12); //字体加粗 font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD); //设置字体名字 font.setFontName("微软雅黑"); //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; } /* * 列数据信息单元格样式 */ public HSSFCellStyle getStyle(HSSFWorkbook workbook) { // 设置字体 HSSFFont font = workbook.createFont(); //设置字体名字 font.setFontName("微软雅黑"); //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; } }
2.测试方法
public static void main(String[] args)throws Exception { HttpServletResponse response=null; String title = "xx报表"; String[] rowsName = new String[]{"oo","xx","oo","xx","xx","oo"}; List<Object[]> dataList = new ArrayList<Object[]>(); Object[] objs = null; for (int i = 0; i < 10; i++) { objs = new Object[rowsName.length]; objs[0] = i; objs[1] = i; objs[2] = i; objs[3] = i; objs[4] = i; SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String date = df.format(new Date()); objs[5] = date; dataList.add(objs); } String fileName="xx报表-"+String.valueOf(System.currentTimeMillis()).substring(4,13)+".xls"; CommonExcel ex = new CommonExcel(title, rowsName, dataList,response,fileName); ex.downloadExcel(); }3.以上就是全部的导出方法以及测试方法
4.那么在页面上只需要写js调用的你controller方法就行了
5.导出的结果：