SSM导入导出Excel(POI)
2018-01-31 21:50
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如何在SSM中实现Excel的导入到处呢,用POI就可以解决了!!下边我直接上代码!
pom.xml
ExcelBean
ExcelUtil,最重要的工具类
上面的都是通用的代码,下边分别是导入导出的代码:
Controller:
Service:
Service:
以上就是导入导出的代码了,主要是工具类的写法了!重要的是你导出的时候千万千万不能用ajax提交请求,要不然下载的页面是不会弹出来的,你可以用下面的代码达到发送请求的目的:
windows.location.href='xxxxxx/export'
pom.xml
<dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.14</version> </dependency>
ExcelBean
package com.xxx.pojo; import org.apache.poi.xssf.usermodel.XSSFCellStyle; public class ExcelBean implements java.io.Serializable{ private String headTextName; //列头(标题)名 private String propertyName; //对应字段名 private Integer cols; //合并单元格数 private XSSFCellStyle cellStyle; public ExcelBean(){ } public ExcelBean(String headTextName, String propertyName){ this.headTextName = headTextName; this.propertyName = propertyName; } public ExcelBean(String headTextName, String propertyName, Integer cols) { super(); this.headTextName = headTextName; this.propertyName = propertyName; this.cols = cols; } public String getHeadTextName() { return headTextName; } public void setHeadTextName(String headTextName) { this.headTextName = headTextName; } public String getPropertyName() { return propertyName; } public void setPropertyName(String propertyName) { this.propertyName = propertyName; } public Integer getCols() { return cols; } public void setCols(Integer cols) { this.cols = cols; } public XSSFCellStyle getCellStyle() { return cellStyle; } public void setCellStyle(XSSFCellStyle cellStyle) { this.cellStyle = cellStyle; } }
ExcelUtil,最重要的工具类
package com.xxx.util; import com.shitong.pojo.ExcelBean; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.ss.usermodel.Cell; 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.usermodel.*; import java.beans.IntrospectionException; import java.beans.PropertyDescriptor; import java.io.InputStream; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.math.BigDecimal; import java.text.*; import java.util.ArrayList; import java.util.Date; import java.util.List; import java.util.Map; public class ExcelUtil { private final static String excel2003L =".xls"; //2003- 版本的excel private final static String excel2007U =".xlsx"; //2007+ 版本的excel /** * Excel导入 */ public static List<List<Object>> getBankListByExcel(InputStream in, String fileName) throws Exception{ List<List<Object>> list = null; //创建Excel工作薄 Workbook work = getWorkbook(in,fileName); if(null == work){ throw new Exception("创建Excel工作薄为空!"); } Sheet sheet = null; Row row = null; Cell cell = null; list = new ArrayList<List<Object>>(); //遍历Excel中所有的sheet for (int i = 0; i < work.getNumberOfSheets(); i++) { sheet = work.getSheetAt(i); if(sheet==null){continue;} //遍历当前sheet中的所有行 //包涵头部,所以要小于等于最后一列数,这里也可以在初始值加上头部行数,以便跳过头部 for (int j = sheet.getFirstRowNum(); j <= sheet.getLastRowNum(); j++) { //读取一行 row = sheet.getRow(j); //去掉空行和表头 if(row==null||row.getFirstCellNum()==j){continue;} //遍历所有的列 List<Object> li = new ArrayList<Object>(); for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) { cell = row.getCell(y); li.add(getCellValue(cell)); } list.add(li); } } return list; } /** * 描述:根据文件后缀,自适应上传文件的版本 */ public static Workbook getWorkbook(InputStream inStr, String fileName) throws Exception{ Workbook wb = null; String fileType = fileName.substring(fileName.lastIndexOf(".")); if(excel2003L.equals(fileType)){ wb = new HSSFWorkbook(inStr); //2003- }else if(excel2007U.equals(fileType)){ wb = new XSSFWorkbook(inStr); //2007+ }else{ throw new Exception("解析的文件格式有误!"); } return wb; } /** * 描述:对表格中数值进行格式化 */ public static Object getCellValue(Cell cell){ Object value = null; DecimalFormat df = new DecimalFormat("0"); //格式化字符类型的数字 SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd"); //日期格式化 DecimalFormat df2 = new DecimalFormat("0.00"); //格式化数字 switch (cell.getCellType()) { case Cell.CELL_TYPE_STRING: value = cell.getRichStringCellValue().getString(); break; case Cell.CELL_TYPE_NUMERIC: if("General".equals(cell.getCellStyle().getDataFormatString())){ value = df.format(cell.getNumericCellValue()); }else if("m/d/yy".equals(cell.getCellStyle().getDataFormatString())){ value = sdf.format(cell.getDateCellValue()); }else{ value = df2.format(cell.getNumericCellValue()); } break; case Cell.CELL_TYPE_BOOLEAN: value = cell.getBooleanCellValue(); break; case Cell.CELL_TYPE_BLANK: value = ""; break; default: break; } return value; } /** * 导入Excel表结束 * 导出Excel表开始 * @param sheetName 工作簿名称 * @param clazz 数据源model类型 * @param objs excel标题列以及对应model字段名 * @param map 标题列行数以及cell字体样式 */ public static XSSFWorkbook createExcelFile(Class clazz, List objs, Map<Integer, List<ExcelBean>> map, String sheetName) throws IllegalArgumentException,IllegalAccessException,InvocationTargetException, ClassNotFoundException, IntrospectionException, ParseException { // 创建新的Excel工作簿 XSSFWorkbook workbook = new XSSFWorkbook(); // 在Excel工作簿中建一工作表,其名为缺省值, 也可以指定Sheet名称 XSSFSheet sheet = workbook.createSheet(sheetName); // 以下为excel的字体样式以及excel的标题与内容的创建,下面会具体分析; createFont(workbook); //字体样式 createTableHeader(sheet, map); //创建标题(头) createTableRows(sheet, map, objs, clazz); //创建内容 return workbook; } private static XSSFCellStyle fontStyle; private static XSSFCellStyle fontStyle2; public static void createFont(XSSFWorkbook workbook) { // 表头 fontStyle = workbook.createCellStyle(); XSSFFont font1 = workbook.createFont(); font1.setBoldweight(XSSFFont.BOLDWEIGHT_BOLD); font1.setFontName("黑体"); font1.setFontHeightInPoints((short) 14);// 设置字体大小 fontStyle.setFont(font1); fontStyle.setBorderBottom(XSSFCellStyle.BORDER_THIN); // 下边框 fontStyle.setBorderLeft(XSSFCellStyle.BORDER_THIN);// 左边框 fontStyle.setBorderTop(XSSFCellStyle.BORDER_THIN);// 上边框 fontStyle.setBorderRight(XSSFCellStyle.BORDER_THIN);// 右边框 fontStyle.setAlignment(XSSFCellStyle.ALIGN_CENTER); // 居中 // 内容 fontStyle2=workbook.createCellStyle(); XSSFFont font2 = workbook.createFont(); font2.setFontName("宋体"); font2.setFontHeightInPoints((short) 10);// 设置字体大小 fontSt 4000 yle2.setFont(font2); fontStyle2.setBorderBottom(XSSFCellStyle.BORDER_THIN); // 下边框 fontStyle2.setBorderLeft(XSSFCellStyle.BORDER_THIN);// 左边框 fontStyle2.setBorderTop(XSSFCellStyle.BORDER_THIN);// 上边框 fontStyle2.setBorderRight(XSSFCellStyle.BORDER_THIN);// 右边框 fontStyle2.setAlignment(XSSFCellStyle.ALIGN_CENTER); // 居中 } /** * 根据ExcelMapping 生成列头(多行列头) * * @param sheet 工作簿 * @param map 每行每个单元格对应的列头信息 */ public static final void createTableHeader(XSSFSheet sheet, Map<Integer, List<ExcelBean>> map) { int startIndex=0;//cell起始位置 int endIndex=0;//cell终止位置 for (Map.Entry<Integer, List<ExcelBean>> entry : map.entrySet()) { XSSFRow row = sheet.createRow(entry.getKey()); List<ExcelBean> excels = entry.getValue(); for (int x = 0; x < excels.size(); x++) { //合并单元格 if(excels.get(x).getCols()>1){ if(x==0){ endIndex+=excels.get(x).getCols()-1; CellRangeAddress range=new CellRangeAddress(0,0,startIndex,endIndex); sheet.addMergedRegion(range); startIndex+=excels.get(x).getCols(); }else{ endIndex+=excels.get(x).getCols(); CellRangeAddress range=new CellRangeAddress(0,0,startIndex,endIndex); sheet.addMergedRegion(range); startIndex+=excels.get(x).getCols(); } XSSFCell cell = row.createCell(startIndex-excels.get(x).getCols()); cell.setCellValue(excels.get(x).getHeadTextName());// 设置内容 if (excels.get(x).getCellStyle() != null) { cell.setCellStyle(excels.get(x).getCellStyle());// 设置格式 } cell.setCellStyle(fontStyle); }else{ XSSFCell cell = row.createCell(x); cell.setCellValue(excels.get(x).getHeadTextName());// 设置内容 if (excels.get(x).getCellStyle() != null) { cell.setCellStyle(excels.get(x).getCellStyle());// 设置格式 } cell.setCellStyle(fontStyle); } } } } public static void createTableRows(XSSFSheet sheet, Map<Integer, List<ExcelBean>> map, List objs, Class clazz) throws IllegalArgumentException, IllegalAccessException, InvocationTargetException, IntrospectionException, ClassNotFoundException, ParseException { int rowindex = map.size(); int maxKey = 0; List<ExcelBean> ems = new ArrayList<>(); for (Map.Entry<Integer, List<ExcelBean>> entry : map.entrySet()) { if (entry.getKey() > maxKey) { maxKey = entry.getKey(); } } ems = map.get(maxKey); List<Integer> widths = new ArrayList<Integer>(ems.size()); for (Object obj : objs) { XSSFRow row = sheet.createRow(rowindex); for (int i = 0; i < ems.size(); i++) { ExcelBean em = (ExcelBean) ems.get(i); // 获得get方法 PropertyDescriptor pd = new PropertyDescriptor(em.getPropertyName(), clazz); Method getMethod = pd.getReadMethod(); Object rtn = getMethod.invoke(obj); String value = ""; // 如果是日期类型进行转换 if (rtn != null) { if (rtn instanceof Date) { DateFormat format = new SimpleDateFormat("yyyy-MM-DD"); value = format.format(rtn); } else if(rtn instanceof BigDecimal){ NumberFormat nf = new DecimalFormat("#,##0.00"); value=nf.format((BigDecimal)rtn).toString(); } else if((rtn instanceof Integer) && (Integer.valueOf(rtn.toString())<0 )){ value="--"; }else { value = rtn.toString(); } } XSSFCell cell = row.createCell(i); cell.setCellValue(value); cell.setCellType(XSSFCell.CELL_TYPE_STRING); cell.setCellStyle(fontStyle2); // 获得最大列宽 int width = value.getBytes().length * 300; // 还未设置,设置当前 if (widths.size() <= i) { widths.add(width); continue; } // 比原来大,更新数据 if (width > widths.get(i)) { widths.set(i, width); } } rowindex++; } // 设置列宽 for (int index = 0; index < widths.size(); index++) { Integer width = widths.get(index); width = width < 2500 ? 2500 : width + 300; width = width > 10000 ? 10000 + 300 : width + 300; sheet.setColumnWidth(index, width); } } }
上面的都是通用的代码,下边分别是导入导出的代码:
1.导入
jsp页面:<form id="form" method="post" action="/azcitem/import" enctype="multipart/form-data"> <div style="margin: 10px;" class="btn btn-primary"> <input id="file" type="file" name="file"/> <input id="excel_button" type="submit" value="导入" /> <div > </div> </div> </form>
Controller:
@RequestMapping("/import") @ResponseBody public Object impotr(@RequestParam("file")CommonsMultipartFile file){ Result result = new Result(); try { InputStream in = file.getInputStream(); azcItemInfoService.importExcelInfo(in,file); in.close(); result.setMsg("ok"); result.setStatue(200); }catch (Exception e){ result.setMsg("err"); result.setStatue(500); } return JSONObject.toJSON(result); }
Service:
@Override public void importExcelInfo(InputStream in, MultipartFile file) { try{ List<List<Object>> listob = ExcelUtil.getBankListByExcel(in,file.getOriginalFilename()); List<AzcItemInfo> azcitemList = new ArrayList<AzcItemInfo>(); //遍历listob数据,把数据放到List中 for (int i = 0; i < listob.size(); i++) { List<Object> ob = listob.get(i); AzcItemInfo azcItemInfo =new AzcItemInfo(); azcItemInfo.setId(String.valueOf(ob.get(0))); azcItemInfo.setName(String.valueOf(ob.get(1))); azcItemInfo.setItemurl(String.valueOf(ob.get(2))); azcItemInfo.setClassfy(String.valueOf(ob.get(3))); azcItemInfo.setZrf(String.valueOf(ob.get(4))); azcItemInfo.setDate(String.valueOf(ob.get(5))); azcitemList.add(azcItemInfo); } azcItemInfoMapper.insertAzcItemList(azcitemList); }catch (Exception e){ e.printStackTrace(); } }
2.导出
Controller:@RequestMapping("/export") public void export(HttpServletResponse response,String idList) { response.setContentType("application/vnd.ms-excel"); response.setHeader("Content-disposition", "attachment;filename=AzcItemInfo.xlsx;charset=UTF-8"); XSSFWorkbook workbook = azcItemInfoService.exportExcelInfo(idList); try { OutputStream output = response.getOutputStream(); BufferedOutputStream bufferedOutPut = new BufferedOutputStream(output); workbook.write(bufferedOutPut); bufferedOutPut.flush(); bufferedOutPut.close(); } catch (IOException e) { e.printStackTrace(); } }
Service:
@Override public XSSFWorkbook exportExcelInfo(String idList) { XSSFWorkbook xssfWorkbook=null; try { //根据ID查找数据 String[] list = idList.split(","); List<AzcItemInfo> azcItemInfoList = new ArrayList<AzcItemInfo>(); for(int i=0;i<list.length;i++){ AzcItemInfo azcItemInfo = azcItemInfoMapper.selectByPrimaryKey(list[i]); azcItemInfoList.add(azcItemInfo); } List<ExcelBean> excel=new ArrayList<>(); Map<Integer,List<ExcelBean>> map=new LinkedHashMap<>(); //设置标题栏 excel.add(new ExcelBean("ID","id",0)); excel.add(new ExcelBean("名称","name",0)); excel.add(new ExcelBean("itemurl","itemurl",0)); excel.add(new ExcelBean("classfy","classfy",0)); excel.add(new ExcelBean("zrf","zrf",0)); excel.add(new ExcelBean("date","date",0)); map.put(0, excel); String sheetName ="AzcItemInfo"; xssfWorkbook = ExcelUtil.createExcelFile(AzcItemInfo.class, azcItemInfoList, map, sheetName); } catch (Exception e) { e.printStackTrace(); } return xssfWorkbook; }
以上就是导入导出的代码了,主要是工具类的写法了!重要的是你导出的时候千万千万不能用ajax提交请求,要不然下载的页面是不会弹出来的,你可以用下面的代码达到发送请求的目的:
windows.location.href='xxxxxx/export'
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