本文实例讲述了JSP上传excel及excel插入至数据库的方法。分享给大家供大家参考。具体如下:
此导入excel是与pojo绑定的,(缺点)excle表头必须是pojo的字段值
1. html页面:
<form id="myform" method="post" enctype="multipart/form-data"><table> <tr><td></td><td> <input type="file" name="filepath" id="filepath"class="easyui-validatebox" required=truevalidType="equalLength[4]" missingMessage="文件!" value="" /></td> </tr> <tr align="center"><td colspan="2"> <a id="btn1" class="easyui-linkbutton"data-options="iconCls:"icon-ok"" style="width: 60px"onclick="subForm();">OK</a> <a id="btn2" class="easyui-linkbutton"data-options="iconCls:"icon-cancel"" style="width: 60px"onclick="closeDig();">Cancel</a></td> </tr></table></form><script type="text/javascript">function subForm(){ if($("#myform").form("validate")){/**var filepath = $("#filepath").val();alert(filepath);$.ajax({ url: "excleImport", typs: "post", data: {"filepath":filepath}, async: false,error: function(request) {$("#dg").datagrid("reload");closeDig();$.messager.alert("操作提示", "操作成功!","info");},success: function(data) { alert("success");}});**/var filepath = $("#filepath").val();var re = /(\+)/g; var filename = filepath.replace(re,"#"); //对路径字符串进行剪切截取 var one = filename.split("#"); //获取数组中最后一个,即文件名 var two = one[one.length-1]; //再对文件名进行截取,以取得后缀名 var three = two.split(".");//获取截取的最后一个字符串,即为后缀名 var last = three[three.length-1]; //添加需要判断的后缀名类型 var tp = "xls,xlsx"; //返回符合条件的后缀名在字符串中的位置 var rs = tp.indexOf(last); if(rs != -1){$("#myform").attr("action","excleImport"); $("#myform").submit();}else{$.messager.alert("操作提示", "您选择的上传文件不是有效xls或者xlsx文件!","error"); return false; }} else {$.messager.alert("操作提示", "请选择上传文件!","error"); }}</script>
2. java代码:
@RequestMapping("/excleImport") public void excleImport(HttpServletRequest request) throws IOException, Exception {request.setCharacterEncoding("utf-8"); //设置编码 //获得磁盘文件条目工厂 DiskFileItemFactory factory = new DiskFileItemFactory(); //获取文件需要上传到的路径 String path = request.getRealPath("/upload/kaku"); File uploadDir = new File(path);if (!uploadDir.exists()) { uploadDir.mkdirs();}factory.setRepository(uploadDir); //设置 缓存的大小,当上传文件的容量超过该缓存时,直接放到 暂时存储室 factory.setSizeThreshold(1024*1024) ; //高水平的API文件上传处理 ServletFileUpload upload = new ServletFileUpload(factory); //可以上传多个文件 List<FileItem> list = (List<FileItem>)upload.parseRequest(request); for(FileItem item : list) {//获取表单的属性名字String name = item.getFieldName();//如果获取的 表单信息是普通的 文本 信息if(item.isFormField()){//获取用户具体输入的字符串 ,名字起得挺好,因为表单提交过来的是 字符串类型的 String value = item.getString() ; request.setAttribute(name, value);}//对传入的非 简单的字符串进行处理 ,比如说二进制的 图片,电影这些else{ /*** 以下三步,主要获取 上传文件的名字*/ //获取路径名 String value = item.getName() ; //索引到最后一个反斜杠 int start = value.lastIndexOf("\"); //截取 上传文件的 字符串名字,加1是 去掉反斜杠, String filename = value.substring(start+1); //文件后缀名String prefix = filename.substring(filename.lastIndexOf(".") + 1);CardCenter cardCenter = new CardCenter();request.setAttribute(name, filename); //真正写到磁盘上 //它抛出的异常 用exception 捕捉 //item.write( new File(path,filename) );//第三方提供的 //手动写的 //OutputStream out = new FileOutputStream(new File(path,filename)); InputStream in = item.getInputStream() ; List<CardCenter> listFromExcel = (List<CardCenter>)ExelUtil.exportListFromExcel(in, prefix, cardCenter);this.cardCenterService.excleImport(listFromExcel);/*int length = 0 ; byte [] buf = new byte[1024] ; System.out.println("获取上传文件的总共的容量:"+item.getSize()); // in.read(buf) 每次读到的数据存放在 buf 数组中 while( (length = in.read(buf) ) != -1) {//在 buf 数组中 取出数据 写到 (输出流)磁盘上out.write(buf, 0, length); } */in.close(); //out.close();} } }
3. java代码:
public class ExelUtil {//第一列开始 private static int start = 0; //最后一列序号 private static int end =0; public static String getSubString(String str){return str.substring(0,str.lastIndexOf(".")); } /** * 方法描述:由Excel文件的Sheet导出至List* @param file* @param sheetNum* @return* @throws IOException* @author * @date 2013-3-25 下午10:44:26* @comment*/ public static List<?> exportListFromExcel(File file, String fileFormat,Object dtoobj)throws IOException { return exportListFromExcel(new FileInputStream(file), fileFormat,dtoobj);}/** * 方法描述:由Excel流的Sheet导出至List * @param is* @param extensionName* @param sheetNum* @return* @throws IOException* @author * @date 2013-3-25 下午10:44:03* @comment*/ public static List<?> exportListFromExcel(InputStream is,String fileFormat,Object dtoobj) throws IOException { Workbook workbook = null; if (fileFormat.equals(BizConstant.XLS)) {workbook = new HSSFWorkbook(is); } else if (fileFormat.equals(BizConstant.XLSX)) {workbook = new XSSFWorkbook(is); } return exportListFromExcel(workbook,dtoobj);}/*** 方法描述:由指定的Sheet导出至List* @param workbook* @param sheetNum* @return* @author * @date 2013-3-25 下午10:43:46* @comment*/ private static List<Object> exportListFromExcel(Workbook workbook ,Object dtoobj) {List<Object> list = new ArrayList<Object>();String[] model = null;Sheet sheet = workbook.getSheetAt(0); // 解析公式结果 FormulaEvaluator evaluator = workbook.getCreationHelper().createFormulaEvaluator(); int minRowIx = sheet.getFirstRowNum(); int maxRowIx = sheet.getLastRowNum(); for (int rowIx = minRowIx; rowIx <= maxRowIx; rowIx++) {Object obj = null; if(rowIx==minRowIx){start = sheet.getRow(rowIx).getFirstCellNum();end = sheet.getRow(rowIx).getLastCellNum(); } Row row = sheet.getRow(rowIx);StringBuilder sb = new StringBuilder(); for (int i = start; i < end; i++) { Cell cell = row.getCell(new Integer(i)); CellValue cellValue = evaluator.evaluate(cell); if (cellValue == null) {sb.append(BizConstant.SEPARATOR+null); continue; } // 经过公式解析,最后只存在Boolean、Numeric和String三种数据类型,此外就是Error了 // 其余数据类型,根据官方文档,完全可以忽略 switch (cellValue.getCellType()) { case Cell.CELL_TYPE_BOOLEAN:sb.append(BizConstant.SEPARATOR + cellValue.getBooleanValue());break; case Cell.CELL_TYPE_NUMERIC:// 这里的日期类型会被转换为数字类型,需要判别后区分处理if (DateUtil.isCellDateFormatted(cell)) { sb.append(BizConstant.SEPARATOR + cell.getDateCellValue());} else { sb.append(BizConstant.SEPARATOR + cellValue.getNumberValue());}break; case Cell.CELL_TYPE_STRING:sb.append(BizConstant.SEPARATOR + cellValue.getStringValue());break; case Cell.CELL_TYPE_FORMULA:break; case Cell.CELL_TYPE_BLANK:break; case Cell.CELL_TYPE_ERROR:break; default:break; }}if(rowIx==minRowIx){String index = String.valueOf(sb);String realmodel =index.substring(1, index.length());model =realmodel.split(","); }else{String index = String.valueOf(sb);String realvalue =index.substring(1, index.length());String[] value =realvalue.split(",");//字段映射try { dtoobj =dtoobj.getClass().newInstance();} catch (InstantiationException e) { e.printStackTrace();} catch (IllegalAccessException e) { e.printStackTrace();}obj = reflectUtil(dtoobj,model,value);list.add(obj); }} return list;}/*** 方法描述:字段映射赋值* @param objOne* @param listName* @param listVales* @return* @author * @date 2013-3-25 下午10:53:43* @comment*/ @SuppressWarnings("deprecation") private static Object reflectUtil(Object objOne, String[] listName, String[] listVales) {Field[] fields = objOne.getClass().getDeclaredFields();for (int i = 0; i < fields.length; i++) { fields[i].setAccessible(true); for (int j = 0; j < listName.length; j++) {if (listName[j].equals(fields[i].getName())) { try {if (fields[i].getType().getName().equals(java.lang.String.class.getName())) {// String type if(listVales[j]!=null){fields[i].set(objOne, listVales[j]); }else{fields[i].set(objOne, ""); }} else if (fields[i].getType().getName().equals(java.lang.Integer.class.getName())|| fields[i].getType().getName().equals("int")) {// Integer typeif(listVales[j]!=null){fields[i].set(objOne, (int)Double.parseDouble(listVales[j]));}else{fields[i].set(objOne, -1);}}else if(fields[i].getType().getName().equals("Date")){ //date type if(listVales[j]!=null){fields[i].set(objOne, Date.parse(listVales[j])); } }else if(fields[i].getType().getName().equals("Double")||fields[i].getType().getName().equals("float")){ //double if(listVales[j]!=null){fields[i].set(objOne, Double.parseDouble(listVales[j]));}else{fields[i].set(objOne, 0.0);}} } catch (IllegalArgumentException e) {e.printStackTrace(); } catch (IllegalAccessException e) {e.printStackTrace(); } break;} }}return objOne; }}
希望本文所述对大家的JSP程序设计有所帮助。