利用POI导入Excel数据到数据库，基于Spring+SpringMVC+Mybatis

1.Maven依赖

<!-- poi -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.9</version>
</dependency>

<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.9</version>
</dependency>

<dependency>
<groupId>xmlbeans</groupId>
<artifactId>xmlbeans</artifactId>
<version>2.3.0</version>
</dependency>

<dependency>
<groupId>stax</groupId>
<artifactId>stax-api</artifactId>
<version>1.0.1</version>
</dependency>

2.Controller

/**
* 客服中心的Controller
*/
@Controller
public class CustomerServiceCenterController {

private CustomerServiceCenterService customerServiceCenterService;

@Autowired
public CustomerServiceCenterController(CustomerServiceCenterService customerServiceCenterService){
this.customerServiceCenterService = customerServiceCenterService;
}

/**
* 导入投诉记录
* @param file
* @return
*/
@RequestMapping(value = "/importComplaints", method = RequestMethod.POST ,produces = "application/json;charset=utf-8")
@ResponseBody
public String importComplaints(@RequestParam("fileName") MultipartFile file){

//判断文件名是否为空
if(file==null) return null;

//获取文件名
String name=file.getOriginalFilename();

//判断文件大小、即名称
long size=file.getSize();
if(name==null || ("").equals(name) && size==0) return null;

try {
//把文件转换成字节流形式
InputStream in = file.getInputStream();
customerServiceCenterService.importComplaints(name,file);

} catch (Exception e) {
e.printStackTrace();
}

return null; //可根据自己需求返回成功记录，成功数等
}

}

3.service实现

/**
* 导入投诉记录
* @param name
* @param file
* @return
*/
@Override
public void importComplaints(String name, MultipartFile file) {

//处理EXCEL
ReadExcel readExcel=new ReadExcel();
//解析Excel，获得Excel里的数据集
List<UComplaints> uComplaintsList=readExcel.getExcelInfo(name,file);

//操作数据库，将uComplaintsList插入到数据库中即可

return null;
}

4. ReadExcel类

import com.platform.pojo.UComplaints;
import org.apache.commons.fileupload.disk.DiskFileItem;
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 org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.commons.CommonsMultipartFile;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;

public class ReadExcel {

//总行数
private int totalRows = 0;

//总条数
private int totalCells = 0;

//错误信息接收器
private String errorMsg;

//构造方法
public ReadExcel(){}

//得到总行数
public int getTotalRows()  { return totalRows;}

//得到总列数
public int getTotalCells() {  return totalCells;}

public String getErrorInfo() { return errorMsg; }

/**
* 验证Excel文件
* @param filePath
* @return
*/
public boolean validateExcel(String filePath){
if (filePath == null || !(WDWUtil.isExcel2003(filePath) || WDWUtil.isExcel2007(filePath))){
errorMsg = "文件名不是excel格式";
return false;
}
return true;
}

/**
* 读Excel文件
* @return
*/
public List<UComplaints> getExcelInfo(String fileName, MultipartFile Mfile){

//把spring文件上传的MultipartFile转换成File
CommonsMultipartFile cf= (CommonsMultipartFile)Mfile;
DiskFileItem fi = (DiskFileItem)cf.getFileItem();
File file = fi.getStoreLocation();

List<UComplaints> uComplaintsList =new ArrayList<UComplaints>();
InputStream is = null;
try{
//验证文件名是否合格
if(!validateExcel(fileName)){
return null;
}
//判断文件时2003版本还是2007版本
boolean isExcel2003 = true;
if(WDWUtil.isExcel2007(fileName)){
isExcel2003 = false;
}
is = new FileInputStream(file);
uComplaintsList =getExcelInfo(is, isExcel2003);
is.close();
}catch(Exception e){
e.printStackTrace();
}
finally{
if(is !=null)
{
try{
is.close();
}catch(IOException e){
is = null;
e.printStackTrace();
}
}
}
return uComplaintsList;
}
/**
* 此方法两个参数InputStream是字节流。isExcel2003是excel是2003还是2007版本
* @param is
* @param isExcel2003
* @return
* @throws IOException
*/
public  List<UComplaints> getExcelInfo(InputStream is,boolean isExcel2003){

List<UComplaints> uComplaintsList=null;
try{
/** 根据版本选择创建Workbook的方式 */
Workbook wb = null;
//当excel是2003时
if(isExcel2003){
wb = new HSSFWorkbook(is);
}
else{
wb = new XSSFWorkbook(is);
}
uComplaintsList = readExcelValue(wb);
}
catch (IOException e)  {
e.printStackTrace();
}
return uComplaintsList;
}
/**
* 读取Excel里面的信息
* @param wb
* @return
*/
private List<UComplaints> readExcelValue(Workbook wb){
//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(前提是有行数)
if(totalRows>=1 && sheet.getRow(0) != null){
this.totalCells=sheet.getRow(0).getPhysicalNumberOfCells();
}

List<UComplaints> uComplaintsList =new ArrayList<UComplaints>();
UComplaints uComplaints;           //投诉记录的bean

//循环Excel行数,从第二行开始。标题不入库
for(int r=1; r<totalRows; r++)
{
Row row = sheet.getRow(r);
if (row == null) continue;

uComplaints=new UComplaints();

//循环Excel的列
for(int c = 0; c <this.totalCells; c++)
{
Cell cell = row.getCell(c);
if (null != cell)
{
//第一列
if(c==0){
//获得第一列<手机号>
/**
* 处理：使用POI读excel文件，当遇到特殊格式的字串，比如“13612345678”，等等，
* 这样的本来是一个字符串，但是POI在读的时候总是以数值型识别，由此，这样的电话号码读出来后总是1.3XXX+E4
*/
DecimalFormat df = new DecimalFormat("#");
String cellValue=df.format(cell.getNumericCellValue());
uComplaints.setPhonenum(cellValue);

}
//获得第二列<产品id>，放到到用户登录bean中。作为登录账号及密码
else if(c==1){

DecimalFormat df = new DecimalFormat("#");
String cellValue=df.format(cell.getNumericCellValue());
Integer appId = null;
try {
appId = Integer.parseInt(cellValue);
} catch (NumberFormatException e) {
e.printStackTrace();
}
uComplaints.setAppId(appId);

}
//第三列  投诉类型
else if(c==2) {
DecimalFormat df = new DecimalFormat("#");
String cellValue=df.format(cell.getNumericCellValue());
Integer ctype = null;
try {
ctype = Integer.parseInt(cellValue);
} catch (NumberFormatException e) {
e.printStackTrace();
}
uComplaints.setCtype(ctype);
}

//第四列描述
else if(c==3){
uComplaints.setMark(cell.getStringCellValue());
}

//第五列状态
else if (c==4){
DecimalFormat df = new DecimalFormat("#");
String cellValue=df.format(cell.getNumericCellValue());
Integer istatus = null;
try {
istatus = Integer.parseInt(cellValue);
} catch (NumberFormatException e) {
e.printStackTrace();
}
uComplaints.setIstatus(istatus);
}

//第六列结果
else if (c==5){
uComplaints.setResultdesc(cell.getStringCellValue());
}

//第七列投诉事件
else if (c==6){
uComplaints.setAddtime(cell.getDateCellValue());
}

//第八列处理时间
else if (c==7){
uComplaints.setResulttime(cell.getDateCellValue());
}

//第九列  合作伙伴id
else if (c==8){
DecimalFormat df = new DecimalFormat("#");
String cellValue=df.format(cell.getNumericCellValue());
Integer coId = null;
try {
coId = Integer.parseInt(cellValue);
} catch (NumberFormatException e) {
e.printStackTrace();
}
uComplaints.setCoId(coId);
}

//第十列  通道id
else if (c==9){
DecimalFormat df = new DecimalFormat("#");
String cellValue=df.format(cell.getNumericCellValue());
Integer bchannelid = null;
try {
bchannelid = Integer.parseInt(cellValue);
} catch (NumberFormatException e) {
e.printStackTrace();
}
uComplaints.setBchannelid(bchannelid);
}

//第十一列订单事物号
else if (c==10){
DecimalFormat df = new DecimalFormat("#");
String cellValue=df.format(cell.getNumericCellValue());
Integer pid = null;
try {
pid = Integer.parseInt(cellValue);
} catch (NumberFormatException e) {
e.printStackTrace();
}
uComplaints.setPid(pid);
}

//第十二列区域名
else if (c==11){
uComplaints.setRegionCode(cell.getStringCellValue());
}

//按照自己数据库字段类型和Excels数据类型来读取

}
}

uComplaintsList.add(uComplaints);
}
return uComplaintsList;
}
}
/**
* @描述：工具类
* 检验是否是EXCEL文件
*/
class WDWUtil
{
// @描述：是否是2003的excel，返回true是2003
public static boolean isExcel2003(String filePath)  {
return filePath.matches("^.+\\.(?i)(xls)$");
}

//@描述：是否是2007的excel，返回true是2007
public static boolean isExcel2007(String filePath)  {
return filePath.matches("^.+\\.(?i)(xlsx)$");
}
}

5.测试

<html>
<body>
<form name="uploadForm" method="POST"
enctype="multipart/form-data"
action="/importComplaints">
Upload File1:<input type="file" name="filename" size="30"/>
<input type="submit" name="submit" value="提交">
<input type="reset" name="reset" value="重置">
</form>

</body>
</html>