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这篇文章主要介绍了SpringMvc+POI如何处理excel表数据导入，具有一定借鉴价值，感兴趣的朋友可以参考下，希望大家阅读完这篇文章之后大有收获，下面让小编带着大家一起了解一下。
一.概念介绍
ApachePOI是Apache软件基金会的开放源码函式库，POI提供API给Java程序对Microsoft Office格式档案读和写的功能
二.功能相关代码
1.环境说明：JDK1.7+tomcat7+spring
2.配置文件的配置
pom文件中添加POI所需依赖
<!-- 添加POI支持 --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.13</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.13</version> </dependency>
spring-mvc.xml配置文件上传
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 默认编码 --> <property name="defaultEncoding" value="utf-8" /> <!-- 文件大小最大值 --> <property name="maxUploadSize" value="10485760000" /> <!-- 内存中的最大值 --> <property name="maxInMemorySize" value="40960" /> </bean>
3.相关工具类及代码编写
Excel解析工具类（ImportExcelUtil.java）
package com.jointem.hrm.utils;
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.XSSFWorkbook;
import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
/**
* Created by jenking on 2017/9/8.
*/
public class ImportExcelUtil {
private final static String excel2003L =".xls"; //2003- 版本的excel
private final static String excel2007U =".xlsx"; //2007+ 版本的excel
/**
* 描述：获取IO流中的数据，组装成List<List<Object>>对象
* @param in,fileName
* @return
* @throws IOException
*/
public List<List<Object>> getBankListByExcel(InputStream in,String fileName) throws Exception{
List<List<Object>> list = null;
//创建Excel工作薄
Workbook work = this.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
System.out.println(sheet.getLastRowNum());
for (int j = sheet.getFirstRowNum(); j <=sheet.getLastRowNum()-11; j++)
{
row = sheet.getRow(j);
// 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);
if(this.isMergedRegion(sheet,j,y))
{
li.add(this.getMergedRegionValue(sheet,j,y));
}
else
{
li.add(this.getCellValue(cell));
}
}
list.add(li);
}
}
work.close();
return list;
}
/**
* 描述：根据文件后缀，自适应上传文件的版本
* @param inStr,fileName
* @return
* @throws Exception
*/
public 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
* @param cell
* @return
*/
public Object getCellValue(Cell cell){
Object value = null;
DecimalFormat df = new DecimalFormat("0"); //格式化number String字符
SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd"); //日期格式化
DecimalFormat df2 = new DecimalFormat("0"); //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;
}
/**
* 获取合并单元格的内容
* @param sheet
* @param row
* @param column
* @return
*/
public Object getMergedRegionValue(Sheet sheet, int row, int column)
{
int sheetMergeCount = sheet.getNumMergedRegions();
for (int i = 0; i < sheetMergeCount; i++)
{
CellRangeAddress ca = sheet.getMergedRegion(i);
int firstColumn = ca.getFirstColumn();
int lastColumn = ca.getLastColumn();
int firstRow = ca.getFirstRow();
int lastRow = ca.getLastRow();
if (row >= firstRow && row <= lastRow)
{
if (column >= firstColumn && column <= lastColumn)
{
Row fRow = sheet.getRow(firstRow);
Cell fCell = fRow.getCell(firstColumn);
return this.getCellValue(fCell);
}
}
}
return null;
}
/**
* 判断是否是合并单元格
* @param sheet
* @param row
* @param column
* @return
*/
public boolean isMergedRegion(Sheet sheet,int row ,int column) {
int sheetMergeCount = sheet.getNumMergedRegions();
for (int i = 0; i < sheetMergeCount; i++) {
CellRangeAddress range = sheet.getMergedRegion(i);
int firstColumn = range.getFirstColumn();
int lastColumn = range.getLastColumn();
int firstRow = range.getFirstRow();
int lastRow = range.getLastRow();
if(row >= firstRow && row <= lastRow){
if(column >= firstColumn && column <= lastColumn){
return true;
}
}
}
return false;
}
}请求控制器（处理页面excel导入请求）
package com.poiexcel.control;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import com.poiexcel.util.ImportExcelUtil;
import com.poiexcel.vo.InfoVo;
@Controller
@RequestMapping("/uploadExcel/*")
public class UploadExcelControl {
/**
* 描述：通过传统方式form表单提交方式导入excel文件
* @param request
* @throws Exception
*/
@RequestMapping(value="upload.do",method={RequestMethod.GET,RequestMethod.POST})
public String uploadExcel(HttpServletRequest request) throws Exception {
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
InputStream in =null;
List<List<Object>> listob = null;
MultipartFile file = multipartRequest.getFile("upfile");
if(file.isEmpty()){
throw new Exception("文件不存在！");
}
in = file.getInputStream();
listob = new ImportExcelUtil().getBankListByExcel(in,file.getOriginalFilename());
in.close();
//该处可调用service相应方法进行数据保存到数据库中，现只对数据输出
for (int i = 0; i < listob.size(); i++) {
List<Object> lo = listob.get(i);
InfoVo vo = new InfoVo();
vo.setCode(String.valueOf(lo.get(0)));
vo.setName(String.valueOf(lo.get(1)));
vo.setDate(String.valueOf(lo.get(2)));
vo.setMoney(String.valueOf(lo.get(3)));
System.out.println("打印信息-->机构:"+vo.getCode()+" 名称："+vo.getName()+" 时间："+vo.getDate()+" 资产："+vo.getMoney());
}
return "result";
}前端代码
前端运用了bootstrap的文件上传组件fileinput,需要引入fileinput.css，fileinput.js，zh.js，bootstrap.css，bootstrap.js,jquery.min.js
<body>
<h5>考勤信息录入</h5>
<form method="POST" enctype="multipart/form-data" id="form1" action="${pageContext.request.contextPath }/attendance/uploadExcel">
<input id="file-zh" name="upfile" type="file" >
</form>
</body>
<script>
$('#file-zh').fileinput({
language: 'zh',
uploadUrl: '${pageContext.request.contextPath }/attendance/uploadExcel',
allowedFileExtensions : ['xls', 'xlsx']
});
</script>Vo对象，保存Excel数据对应的对象
package com.poiexcel.vo;
//将Excel每一行数值转换为对象
public class InfoVo {
private String code;
private String name;
private String date;
private String money;
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getMoney() {
return money;
}
public void setMoney(String money) {
this.money = money;
}
}三.效果展示
1.页面展示
2.后台信息打印
感谢你能够认真阅读完这篇文章，希望小编分享的“SpringMvc+POI如何处理excel表数据导入”这篇文章对大家有帮助，同时也希望大家多多支持亿速云，关注亿速云行业资讯频道，更多相关知识等着你来学习!
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