首先是jsp页面：
<body scroll=no style="overflow-y:hidden;" onselectstart="return false">
<div class="container" style="overflow-y:auto; padding-top:0px;" onscroll="hideAutoTiShi();">
<div class="row">
<form action="/ds/excelUploadServlet" enctype="multipart/form-data" method="post">
<input id="file" type="file" name="file" value="选择文件"/>
<input id="submit" type="submit" onclick="undo();" value="提交"/>
</form>
</div>
</div>
<script src="jquery.min.js"></script>
<script src="jquery.form.js"></script>
<script src="excel_import.js"></script>
</body>
然后是Servlet的Java服务类
package com.inspur.dtdcommon.ds.cmd; import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List; import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.loushang.next.dao.DaoFactory; import com.inspur.dtdcommon.ds.dao.DtdCheckEntBasicInfoDao;
import com.inspur.dtdcommon.ds.dao.DtdCheckEntBasicInfoDetailDao;
import com.inspur.dtdcommon.ds.data.DtdCheckEntBasicInfo;
import com.inspur.dtdcommon.ds.data.DtdCheckEntBasicInfoDetail;
import com.inspur.dtdcommon.util.DtdUtil;
import com.inspur.dtdcommon.util.ImportExecl; public class ExcelUploadServlet extends HttpServlet{
private DtdUtil dtdUtil = DtdUtil.getInstance();
private DtdCheckEntBasicInfoDao dao = (DtdCheckEntBasicInfoDao) DaoFactory
.getDao("com.inspur.dtdcommon.ds.dao.DtdCheckEntBasicInfoDao");
private DtdCheckEntBasicInfoDetailDao dao_detail = (DtdCheckEntBasicInfoDetailDao) DaoFactory
.getDao("com.inspur.dtdcommon.ds.dao.DtdCheckEntBasicInfoDetailDao");
public ExcelUploadServlet() {
super();
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
doPost(req, resp);
}
/**
* //遍历Excel文件，然后读取文件封装成List数据
*/
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
String zhi=null;
FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
InputStream inputStream = null;
DtdCheckEntBasicInfo entity = new DtdCheckEntBasicInfo();
List<DtdCheckEntBasicInfo> listInfo = new ArrayList<>();
DtdCheckEntBasicInfoDetail bean = new DtdCheckEntBasicInfoDetail();
List<DtdCheckEntBasicInfoDetail> listBean = new ArrayList<>();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
/**
* 读取上传文件
*/
try {
List items = upload.parseRequest(req);
Iterator iter = items.iterator();
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
if (!item.isFormField()) {
inputStream = item.getInputStream();
}
}
} catch (FileUploadException e) {
e.printStackTrace();
}
/**
* POI遍历Excel文件，然后读取文件封装成List数据
*/
ImportExecl poi = new ImportExecl();
List<List<String>> list = poi.read(inputStream, false);
if (list != null) {
for (int i = 1; i < list.size(); i++) {
List<String> cellList = list.get(i);
String ID = dtdUtil.getUUID().toUpperCase();
entity.setId(ID);
entity.setEntid(ID);
entity.setEntname(cellList.get(0));
entity.setAreaid(cellList.get(1));
entity.setAreaname(cellList.get(2));
entity.setRegisteraddress(cellList.get(3));
entity.setAddress(cellList.get(4));
entity.setSocietycreditcode(cellList.get(5));
entity.setLerepname(cellList.get(6));
entity.setLerepmobile(cellList.get(7));
entity.setLereptelephonenum(cellList.get(8));
entity.setIssueDate(cellList.get(9));
entity.setValidDate(cellList.get(10));
entity.setDataStatus("10");
entity.setCreateTime(new Date());
listInfo.add(entity);//处理生成List数组
System.out.println();
bean.setId(ID);
bean.setEntid(ID);
bean.setEntname(cellList.get(0));
bean.setRecordInfo(cellList.get(11));
bean.setFund(cellList.get(12));
bean.setAssets(cellList.get(13));
bean.setQualification(cellList.get(14));
bean.setRegulators(cellList.get(15));
bean.setBusinessScope(cellList.get(16));
bean.setRegisteredCapital(cellList.get(17));
bean.setEstablishTime(sdf.format(new Date()));
bean.setBusinessStartDate(cellList.get(9));
bean.setBusinessEndDate(cellList.get(10));
bean.setRegistrationAuthority(cellList.get(18));
bean.setApprovalDate(cellList.get(19));
if("已登记".equals(cellList.get(20))){
bean.setRegistrationStatus("1");
}else{
bean.setRegistrationStatus("0");
}
listBean.add(bean);
}
//遍历Excel文件，然后读取文件封装成List数据,然后插入到数据中
dao.batchInsert(listInfo);
dao_detail.batchInsert(listBean);
}else{
throw new RuntimeException("请填写Excel内容");
} } }
ImportExecl 读取Excel的工具类
package com.inspur.dtdcommon.util; import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
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; /**
* excel读取 工具类
*
* @jar包
* 该类使用到了以下jar：
* 1、poi-ooxml-3.9.jar
* 2、poi-3.9.jar
*/
public class ImportExecl { /**
* main测试
*/
public static void main(String[] args) throws Exception {
ImportExecl poi = new ImportExecl();
List<List<String>> list = poi.read("E:/批量导入客户模板.xlsx");
if (list != null) {
for (int i = 0; i < list.size(); i++) {
List<String> cellList = list.get(i);
for (int j = 0; j < cellList.size(); j++) {
System.out.print(" " + cellList.get(j));
}
System.out.println();
}
}
} //总行数
private int totalRows = 0; //总列数
private int totalCells = 0; //错误信息
private String errorInfo; //构造方法
public ImportExecl() {
} /**
* 得到总行数
*/
public int getTotalRows() {
return totalRows;
} /**
* 得到总列数
*/
public int getTotalCells() {
return totalCells;
} /**
* 得到错误信息
*/
public String getErrorInfo() {
return errorInfo;
} /**
* 验证excel文件
*/
public boolean validateExcel(String filePath) {
/** 检查文件名是否为空或者是否是Excel格式的文件 */
if (filePath == null || !(CheckExcelUtil.isExcel2003(filePath) || CheckExcelUtil.isExcel2007(filePath))) {
errorInfo = "文件名不是excel格式";
return false;
} /** 检查文件是否存在 */
File file = new File(filePath);
if (file == null || !file.exists()) {
errorInfo = "文件不存在";
return false;
}
return true;
} /**
* 根据文件路径读取excel文件
*/
public List<List<String>> read(String filePath) throws IOException {
List<List<String>> dataLst = new ArrayList<List<String>>();
InputStream is = null;
try {
/** 验证文件是否合法 */
if (!validateExcel(filePath)) {
System.out.println(errorInfo);
return null;
} /** 判断文件的类型，是2003还是2007 */
boolean isExcel2003 = true;
if (CheckExcelUtil.isExcel2007(filePath)) {
isExcel2003 = false;
} /** 调用本类提供的根据流读取的方法 */
File file = new File(filePath);
is = new FileInputStream(file);
dataLst = read(is, isExcel2003);
is.close();
is = null;
} catch (Exception ex) {
ex.printStackTrace();
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
is = null;
e.printStackTrace();
}
}
}
return dataLst;
} /**
* 根据流读取Excel文件
*
* @param inputStream 文件输入流
* @param isExcel2003 标识是否2003的excel。
* true：是2003的excel，false：是2007的excel
* @return
*
* @扩展说明
* 如果使用springmvc的MultipartFile接收前端上传的excel文件的话，可以使用MultipartFile的对象，获取上传的文件名称，
* 然后，可以通过 CheckExcelUtil 类的方法，接收文件名称参数，来判断excel所属的版本。最后再调用此方法来读取excel数据。
*
*/
public List<List<String>> read(InputStream inputStream, boolean isExcel2003) {
List<List<String>> dataLst = null;
try {
/** 根据版本选择创建Workbook的方式 */
Workbook wb = null;
if (isExcel2003) {
wb = new HSSFWorkbook(inputStream);
} else {
wb = new XSSFWorkbook(inputStream);
}
dataLst = read(wb);
} catch (IOException e) {
e.printStackTrace();
}
return dataLst;
} /**
* 读取数据
*/
private List<List<String>> read(Workbook wb) {
List<List<String>> dataLst = new ArrayList<List<String>>();
//得到第一个shell
Sheet sheet = wb.getSheetAt(0);
//得到Excel的行数
this.totalRows = sheet.getPhysicalNumberOfRows();
//得到Excel的列数
if (this.totalRows >= 1 && sheet.getRow(0) != null) {
this.totalCells = sheet.getRow(0).getPhysicalNumberOfCells();
} //循环Excel的行
for (int r = 0; r < this.totalRows; r++) {
Row row = sheet.getRow(r);
if (row == null) {
continue;
}
List<String> rowLst = new ArrayList<String>();
//循环Excel的列
for (int c = 0; c < this.getTotalCells(); c++) {
Cell cell = row.getCell(c);
String cellValue = "";
if (null != cell) {
cell.setCellType(HSSFCell.CELL_TYPE_STRING); //把所有的Excel内容当做字符串处理
// 以下是判断数据的类型
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_NUMERIC: // 数字
cellValue = cell.getNumericCellValue() + "";
break; case HSSFCell.CELL_TYPE_STRING: // 字符串
cellValue = cell.getStringCellValue();
break; case HSSFCell.CELL_TYPE_BOOLEAN: // Boolean
cellValue = cell.getBooleanCellValue() + "";
break; case HSSFCell.CELL_TYPE_FORMULA: // 公式
cellValue = cell.getCellFormula() + "";
break; case HSSFCell.CELL_TYPE_BLANK: // 空值
cellValue = "";
break; case HSSFCell.CELL_TYPE_ERROR: // 故障
cellValue = "非法字符";
break; default:
cellValue = "未知类型";
break;
}
}
rowLst.add(cellValue);
} //保存第r行的第c列
dataLst.add(rowLst);
}
return dataLst;
} } class CheckExcelUtil {
/**
* 检查是否是2003的excel，若是，则返回true
*/
public static boolean isExcel2003(String filePath) {
return filePath.matches("^.+\\.(?i)(xls)$");
} /**
* 检查是否是2007的excel，若是，则返回true
*/
public static boolean isExcel2007(String filePath) {
return filePath.matches("^.+\\.(?i)(xlsx)$");
}
}
最后不要忘了web.xml
<servlet>
<servlet-name>ExcelUploadServlet</servlet-name>
<servlet-class>com.inspur.dtdcommon.ds.cmd.ExcelUploadServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ExcelUploadServlet</servlet-name>
<url-pattern>/excelUploadServlet</url-pattern>
</servlet-mapping>
然后就完成了Excel内容读取，Excel如下：
读取Excel的时候，是从第二行开始读取的，如果需要从第一行开始读取修改ExcelUploadServlet.java文件中
for (int i = 1; i < list.size(); i++) {}
把其中的i=1修改成i=0就会从Excel第一行开始读取。