java-文件上传-excel存入数据库全代码及流程（附前端代码）(java上传文件 multipartfile)

java-文件上传-excel存入数据库全代码及流程（附前端代码）

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今天给大家带来的是文件上传中比较常用的，上传excel文件，将表格中的数据存入数据库中的一个转化的工具类；大致的流程是：前端点击上传按钮-->选择需要上传的excel表格-->确认上传-->    文件传到后台-->后台处理file文件-->将文件转化成List-->将List集合存入数据库

首先通过前端点击按钮：

<button type="button" id="input" data-loading-text="正在上传..." class="btn btn-default"> 导入 <i class="fa fa-upload"></i></button>

点击导入按钮，触发input框点击事件：

$('#input').click(function () { $('#import_modal').modal('show'); })

 点击按钮后，弹出框：

 弹窗代码：

<div class="modal fade" id="import_modal"> <div class="modal-dialog" style="max-height:80%"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal"> <span aria-hidden="true">&times;</span> <span class="sr-only">Close</span> </button> <h4 class="modal-title">上传数据</h4> </div> <div class="modal-body" style="overflow: auto; max-hieght:800px;"> <div class="container-fluid" style="height: 300px;"> <form class="form-horizontal" enctype="multipart/form-data"> <div class="form-group"> <label for="file" class="col-sm-3 control-label"> 上传文件</label> <div class="col-sm-4"> <input class="form-control" accept=".xlsx" style="padding:3px;" type="file" id="file" name="file"/> </div> </div> </form> </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" id="import" data-loading-text="正在上传...">确定 </button> <button type="button" class="btn btn-default" data- dismiss="modal">取消</button> </div> </div> </div> </div>

选择要上传的文件，然后点击确定：

点击确定触发：将请求地址改成自己本地的

$('#import_modal form').bootstrapValidator('destroy'); $('#import_modal form').bootstrapValidator({ message: '输入不合法', fields: { file: { validators: { notEmpty: {message: '文件不能为空'} } } } }).on('success.form.bv', function (e) { var files = $("#file").get(0).files; if (files.length > 0) { if (files[0].size > 1024 * 1024 * 100) { alert('文件大小不能超过100MB'); return false; } var formData = new FormData(); formData.append('file', files[0]); $.ajax({ url: '${pageContext.request.contextPath}/backend/form/evaluation_update/import', type: 'POST', cache: false, data: formData, processData: false, contentType: false, dataType: "json", beforeSend: function () { $('#import').button('loading'); }, success: function (data) { if (data.errorCode === 0) { alert(data.message); $('#import_modal').modal('hide'); location.reload(); } else { alert(data.message); } $('#import').button('reset'); }, error: function () { $('#import').button('reset'); } }); } });

请求到后台：

poi依赖

<dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.14</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.14</version> </dependency>

controller层

@RequestMapping("evaluation_update/import") @ResponseBody public Result evaluationUpdate(@RequestParam(value = "file", required = true) MultipartFile file, UserSession session) throws Exception { try { Result result = new Result(); result.setMessage("导入成功"); int count = wfOrderService.importAnnualDemand(session, file); result.setMessage(count > 0 ? "导入成功，共：" + count + "条记录！" : "本次导入0条数据！"); return result; } catch (Exception e) { e.printStackTrace(); return null; } }

service层：

public int importAnnualDemand(UserSession session, MultipartFile file) throws ErrorCodeException {List<Map<String, ArrayList<String[]>>> allDateList = new ArrayList<>();List<Requirement>list=new ArrayList<>();List<String[]> dataList;try {String filePath=getFilePath(file);Map<String,Object> insert = new HashMap();insert.put("file", filePath);File excelFile = uploadManager.file(filePath);dataList = POIExcelUtil.readExcel(excelFile, 1, false);System.out.println(dataList);for (String[] strings : dataList) {Requirement r = new Requirement();r.setErpCode(strings[0]);r.setAnnualDemand(new BigDecimal(strings[1]));r.setYear(strings[2]);list.add(r);}if(!list.isEmpty()){return this.insert(STATEMENT_ID + "importAnnualDemand", list);}return 0;}catch (Exception e){e.printStackTrace();return 0;}}POIExcelUtil.readExcel工具类代码(拷贝即用)：//包名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.xssf.usermodel.XSSFWorkbook;import java.io.*;import java.text.DecimalFormat;import java.text.NumberFormat;import java.text.SimpleDateFormat;import java.util.*;public class POIExcelUtil { private final static String XLS = "xls"; private final static String XLSX = "xlsx"; private static NumberFormat numberFormat = NumberFormat.getNumberInstance(); static { numberFormat.setGroupingUsed(false); } public static List<String[]> readExcel(File file, int firstRowNum, boolean needTitle) throws IOException { // 检查文件 checkFile(file); Workbook workBook = getWorkBook(file); // 返回对象,每行作为一个数组，放在集合返回 ArrayList<String[]> rowList = new ArrayList<>(); if (null != workBook) { // 获得当前sheet工作表 Sheet sheet = workBook.getSheetAt(0); if (sheet != null) { // 获得当前sheet的结束行 int lastRowNum = sheet.getLastRowNum(); sheet.getSheetName(); int firstCellNum = sheet.getRow(firstRowNum - 1).getFirstCellNum(); int lastCellNum = sheet.getRow(firstRowNum - 1).getLastCellNum(); if (lastCellNum > 200) { lastCellNum = 200; } if (needTitle) { // 获取标题行，并返回在第一个list元素 Row titleRow = sheet.getRow(firstRowNum - 1); String[] titleCells = new String[lastCellNum]; // 循环当前行 for (int cellNum = firstCellNum; cellNum < lastCellNum; cellNum++) { Cell cell = titleRow.getCell(cellNum); titleCells[cellNum] = getOriginalCellValue(cell); } rowList.add(titleCells); } // 循环所有行数据 for (int rowNum = firstRowNum; rowNum <= lastRowNum; rowNum++) { // 获得当前行 Row row = sheet.getRow(rowNum); if (row == null) { continue; } String[] cells = new String[lastCellNum]; // 循环当前行 for (int cellNum = firstCellNum; cellNum < lastCellNum; cellNum++) { Cell cell = row.getCell(cellNum); cells[cellNum] = getOriginalCellValue(cell); } rowList.add(cells); } } workBook.close(); } return rowList; } public static List<String[]> readExcelPrecision(File file, int firstRowNum) throws IOException { // 检查文件 checkFile(file); Workbook workBook = getWorkBook(file); // 返回对象,每行作为一个数组，放在集合返回 ArrayList<String[]> rowList = new ArrayList<>(); if (null != workBook) { // 获得当前sheet工作表 Sheet sheet = workBook.getSheetAt(0); if (sheet != null) { // 获得当前sheet的结束行 int lastRowNum = sheet.getLastRowNum(); sheet.getSheetName(); int firstCellNum = sheet.getRow(firstRowNum - 1).getFirstCellNum(); int lastCellNum = sheet.getRow(firstRowNum - 1).getLastCellNum(); if (lastCellNum > 200) { lastCellNum = 200; } // 循环所有行数据 for (int rowNum = firstRowNum; rowNum <= lastRowNum; rowNum++) { // 获得当前行 Row row = sheet.getRow(rowNum); if (row == null) { continue; } String[] cells = new String[lastCellNum]; // 循环当前行 for (int cellNum = firstCellNum; cellNum < lastCellNum; cellNum++) { Cell cell = row.getCell(cellNum); cells[cellNum] = getOriginalCellValuePrecision(cell); } rowList.add(cells); } } workBook.close(); } return rowList; } public static List<Map<String, ArrayList<String[]>>> readMultiExcel(File file, int firstRowNum, int firstRowNum2, boolean needTitle) throws IOException { // 检查文件 checkFile(file); Workbook workBook = getWorkBook(file); List<Map<String, ArrayList<String[]>>> resultList = new ArrayList<>(); // 返回对象,每行作为一个数组，放在集合返回 if (null != workBook) { // 获得当前sheet工作表 for (int w = 0; w < workBook.getNumberOfSheets(); w++) { Sheet sheet = workBook.getSheetAt(w); if (sheet != null) { ArrayList<String[]> rowList = new ArrayList<>(); Map<String, ArrayList<String[]>> sheetMap = new HashMap<>(); String sheetName = sheet.getSheetName(); // 获得当前sheet的结束行 int lastRowNum = sheet.getLastRowNum(); int firstCellNum = sheet.getRow(w > 0 ? firstRowNum2 - 1 : firstRowNum - 1).getFirstCellNum(); int lastCellNum = sheet.getRow(w > 0 ? firstRowNum2 - 1 : firstRowNum - 1).getLastCellNum(); if (needTitle) { // 获取标题行，并返回在第一个list元素 Row titleRow = sheet.getRow(w > 0 ? firstRowNum2 - 1 : firstRowNum - 1); String[] titleCells = new String[lastCellNum]; // 循环当前行 for (int cellNum = firstCellNum; cellNum < lastCellNum; cellNum++) { Cell cell = titleRow.getCell(cellNum); titleCells[cellNum] = getOriginalCellValueByMulti(cell); } rowList.add(titleCells); } // 循环所有行数据 for (int rowNum = w > 0 ? firstRowNum2 - 1 : firstRowNum - 1; rowNum <= lastRowNum; rowNum++) { // 获得当前行 Row row = sheet.getRow(rowNum); if (row == null) { continue; } String[] cells = new String[lastCellNum]; // 循环当前行 for (int cellNum = firstCellNum; cellNum < lastCellNum; cellNum++) { Cell cell = row.getCell(cellNum); cells[cellNum] = getOriginalCellValueByMulti(cell); } rowList.add(cells); } sheetMap.put(sheetName, rowList); resultList.add(sheetMap); } } workBook.close(); } return resultList; } public static String getOriginalCellValueByMulti(Cell cell) { DecimalFormat originalValueDecimalFormat = new DecimalFormat("#.##"); SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd"); if (cell == null) { return ""; } int cellType = cell.getCellType(); switch (cellType) { case Cell.CELL_TYPE_FORMULA: return numberFormat.format(cell.getNumericCellValue()); case Cell.CELL_TYPE_NUMERIC: if (org.apache.poi.ss.usermodel.DateUtil.isCellDateFormatted(cell)) { Date dateCellValue = cell.getDateCellValue(); if (dateCellValue != null) { return simpleDateFormat.format(dateCellValue); } return ""; } return originalValueDecimalFormat .format(cell.getNumericCellValue()); case Cell.CELL_TYPE_STRING: return cell.getStringCellValue(); case Cell.CELL_TYPE_BOOLEAN: return String.valueOf(cell.getBooleanCellValue()); case Cell.CELL_TYPE_BLANK: return ""; case Cell.CELL_TYPE_ERROR: return String.valueOf(cell.getErrorCellValue()); } return ""; } public static String getOriginalCellValue(Cell cell) { DecimalFormat originalValueDecimalFormat = new DecimalFormat("#.##"); SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd"); if (cell == null) { return ""; } int cellType = cell.getCellType(); switch (cellType) { case Cell.CELL_TYPE_FORMULA: return String.valueOf(cell.getNumericCellValue()); case Cell.CELL_TYPE_NUMERIC: if (org.apache.poi.ss.usermodel.DateUtil.isCellDateFormatted(cell)) { Date dateCellValue = cell.getDateCellValue(); if (dateCellValue != null) { return simpleDateFormat.format(dateCellValue); } return ""; } return originalValueDecimalFormat .format(cell.getNumericCellValue()); case Cell.CELL_TYPE_STRING: return cell.getStringCellValue(); case Cell.CELL_TYPE_BOOLEAN: return String.valueOf(cell.getBooleanCellValue()); case Cell.CELL_TYPE_BLANK: return ""; case Cell.CELL_TYPE_ERROR: return String.valueOf(cell.getErrorCellValue()); } return ""; } public static String getOriginalCellValuePrecision(Cell cell) { DecimalFormat originalValueDecimalFormat = new DecimalFormat("#.####"); SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd"); if (cell == null) { return ""; } int cellType = cell.getCellType(); switch (cellType) { case Cell.CELL_TYPE_FORMULA: return String.valueOf(cell.getNumericCellValue()); case Cell.CELL_TYPE_NUMERIC: if (org.apache.poi.ss.usermodel.DateUtil.isCellDateFormatted(cell)) { Date dateCellValue = cell.getDateCellValue(); if (dateCellValue != null) { return simpleDateFormat.format(dateCellValue); } return ""; } return originalValueDecimalFormat .format(cell.getNumericCellValue()); case Cell.CELL_TYPE_STRING: return cell.getStringCellValue(); case Cell.CELL_TYPE_BOOLEAN: return String.valueOf(cell.getBooleanCellValue()); case Cell.CELL_TYPE_BLANK: return ""; case Cell.CELL_TYPE_ERROR: return String.valueOf(cell.getErrorCellValue()); } return ""; } /** * 获得工作簿对象 */ private static Workbook getWorkBook(File file) throws IOException { String filename = file.getName(); Workbook workbook = null; InputStream is = new FileInputStream(file); if (filename.endsWith(XLS)) { // 2003 workbook = new HSSFWorkbook(is); } else if (filename.endsWith(XLSX)) { // 2007 workbook = new XSSFWorkbook(is); } return workbook; } /** * 检查文件 */ private static void checkFile(File file) throws IOException { if (null == file) { throw new FileNotFoundException("文件不存在！"); } // 获取文件名 String filename = file.getName(); // 判断是否为excel文件 if (!filename.endsWith(XLS) && !filename.endsWith(XLSX)) { throw new IOException(filename + "不是excel文件"); } } /** * 取单元格的值 */ private static String getCellValue(Cell cell) { String cellValue = ""; if (cell == null) { return cellValue; } // 把数字当成String来读，防止1读成1.0 if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) { // 日期格式 short format = cell.getCellStyle().getDataFormat(); if (format == 14 || format == 31 || format == 57 || format == 58 || (182 <= format && format <= 196) || (210 <= format && format <= 213) || (208 == format)) { // 日期 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); double value = cell.getNumericCellValue(); Date date = org.apache.poi.ss.usermodel.DateUtil.getJavaDate(value); if (date == null || "".equals(date)) { return ""; } return sdf.format(date); } else { // 不是日期格式 cell.setCellType(Cell.CELL_TYPE_STRING); } } // 判断数据的类型 switch (cell.getCellType()) { // 数字 case Cell.CELL_TYPE_NUMERIC: cellValue = String.valueOf(cell.getNumericCellValue()); break; // 字符串 case Cell.CELL_TYPE_STRING: cellValue = String.valueOf(cell.getStringCellValue()).trim().replaceAll(String.valueOf((char) 10), "") .replaceAll(String.valueOf((char) 11), "").replaceAll(String.valueOf((char) 12), "") .replaceAll(String.valueOf((char) 13), ""); break; // 布尔 case Cell.CELL_TYPE_BOOLEAN: cellValue = String.valueOf(cell.getBooleanCellValue()); break; // 公式 case Cell.CELL_TYPE_FORMULA:// cellValue = String.valueOf(cell.getCellFormula()); try { cellValue = String.valueOf(cell.getNumericCellValue()); } catch (IllegalStateException e) { cellValue = String.valueOf(cell.getRichStringCellValue()); } break; // 空 case Cell.CELL_TYPE_BLANK: cellValue = ""; break; // 错误 case Cell.CELL_TYPE_ERROR: cellValue = "非法字符"; break; default: cellValue = "未知类型"; break; } return cellValue; }}

service注入一个上传类：

@Autowiredprivate UploadManager uploadManager;

上传工具类（拷贝即用）：

import com.yogapay.core.LangUitls;import com.yogapay.sql.mapping2.StringListSQLData;import java.io.File;import java.io.IOException;import java.net.URI;import java.util.Collections;import java.util.Date;import java.util.HashMap;import java.util.Map;import javax.servlet.ServletContext;import org.apache.commons.lang.StringUtils;import org.springframework.beans.factory.InitializingBean;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.multipart.MultipartFile;public class UploadManager implements InitializingBean {public static final String PATH_PREFIX = "/uploads";private final String basePath;private final String[] dirNames;@Autowired(required = false)private ServletContext sc;//private File baseDir;private URI baseDirUri;private Map<String, File> dirs;public UploadManager(String basePath, String dirNames) {this.basePath = StringUtils.trimToNull(basePath);this.dirNames = dirNames.split("\\s+");}@Overridepublic void afterPropertiesSet() throws Exception {if (sc == null) {baseDir = new File("target");} else {baseDir = new File(basePath == null ? sc.getRealPath("uploads") : basePath);}baseDirUri = baseDir.toURI();dirs = new HashMap<String, File>();for (String dir : dirNames) {dirs.put(dir, createDir(dir));}dirs = Collections.unmodifiableMap(dirs);}private File createDir(String name) {File t = new File(baseDir, name);if (!t.mkdir() && !t.exists()) {throw new RuntimeException(t.getAbsolutePath());}return t;}public File file(String src) {if (!src.startsWith(PATH_PREFIX)) {throw new IllegalArgumentException();}src = src.substring(PATH_PREFIX.length());if (src.isEmpty() || src.charAt(0) != '/') {throw new IllegalArgumentException();}return new File(baseDirUri.resolve(src.substring(1)));}public String src(File f) {URI uri = baseDirUri.relativize(f.toURI());if (uri.isAbsolute()) {throw new IllegalArgumentException();}return PATH_PREFIX + "/" + uri;}public StringListSQLData saveDailyFiles(File rdir, Date date, MultipartFile[] files, String prefix, String suffix) throws IOException {if (files == null) {return null;}File dir = LangUitls.dailyFile(rdir, date);StringListSQLData fileList = new StringListSQLData();for (MultipartFile img : files) {if (!img.isEmpty()) {File f = File.createTempFile(prefix, suffix, dir);img.transferTo(f);fileList.add(src(f));}}return fileList;}public File getBaseDir() {return baseDir;}public Map<String, File> getDirs() {return dirs;}}StringListSQLData：public class StringListSQLData extends ArrayList<String> implements SQLDataConvertible {public StringListSQLData(int initialCapacity) {super(initialCapacity);}public StringListSQLData() {}public StringListSQLData(Collection<? extends String> c) {super(c);}@Overridepublic void toSQLData(PreparedStatement pstmt, int index) throws SQLException {Element eArray = DocumentHelper.createElement("List");for (String t : this) {Element eValue = DocumentHelper.createElement("value");eValue.setText(t == null ? "" : t);eArray.add(eValue);}pstmt.setString(index, eArray.asXML());}@Overridepublic boolean fromSQLData(ResultSet rs, int index) throws SQLException {String xml = rs.getString(index);if (rs.wasNull()) {return false;}try {Document doc = DocumentHelper.parseText(xml);for (Iterator<Element> iterator = doc.getRootElement().elementIterator("value"); iterator.hasNext();) {Element next = iterator.next();this.add(next.getText());}} catch (DocumentException ex) {throw new SQLException("\r\n" + xml, ex);}return true;}

获取文件地址：

public String getFilePath(MultipartFile file) throws IOException {MultipartFile[] files = {file};String targetDir = uploadManager.getBaseDir() + "/" + "";int index = file.getOriginalFilename().lastIndexOf(".");String ext = index > 0 ? file.getOriginalFilename().substring(index + 1) : "";StringListSQLData fileData = uploadManager.saveDailyFiles(new File(targetDir), new Date(), files, "file_", "." + ext);return fileData.get(0);}

最后在Mybatis中将对应映射的sql写好就行了哦

<insert id="importAnnualDemand" >INSERT IGNORE INTO 表名(字段名)VALUES<foreach item="i" collection="list" separator=",">(#{i.属性名})</foreach></insert>

最后导入成功：

今天的分享结束啦，谢谢大家哦~~