经过前几篇文章,已经成功把excel文件成功上传成功了,接下来就是要在后台中拿到excel的每一行和每一列进行操作。怎样解析excel文件拿到里面的内容就变得重中之重了,请看我下面的“神来之笔"。
1、pom.xml
org.apache.poi
poi
3.14
org.apache.poi
poi-ooxml
3.14
2、ImportExcelUtil.java(Excel解析工具类)
/**
*
*/
/**
* @author congliu
*
*/
package ad.web.util;
import java.io.IOException;
import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
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;
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>对象
*
* @param in,fileName
* @return
* @throws IOException
*/
public List> getBankListByExcel(InputStream in, String fileName) throws Exception {
List> 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>();
// 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
for (int j = sheet.getFirstRowNum(); j < sheet.getLastRowNum() + 1; j++) { // 这里的加一是因为下面的循环跳过取第一行表头的数据内容了
row = sheet.getRow(j);
if (row == null || row.getFirstCellNum() == j) {
continue;
}
// 遍历所有的列
List
3、UploadAndDownAction.java (spring控制器)
package ad.web.action;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.io.FileUtils;
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.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import ad.web.bean.InfoVo;
import ad.web.util.ImportExcelUtil;
@Controller
public class UploadAndDownAction {
/**
* 上传多个附件的操作类
*
* @param multiRequest
* @throws Exception
*/
@RequestMapping(value = "/upload", method = RequestMethod.POST)
@ResponseBody
public String doUploadFile(@RequestParam("file") MultipartFile file, HttpServletRequest request) throws Exception {
if (!file.isEmpty()) {
try {
// 这里将上传得到的文件保存指定目录下
FileUtils.copyInputStreamToFile(file.getInputStream(),
new File("d:\\upload\\file\\", System.currentTimeMillis() + file.getOriginalFilename()));
} catch (IOException e) {
e.printStackTrace();
}
}
InputStream in = null;
List> listob = null;
in = file.getInputStream();
listob = new ImportExcelUtil().getBankListByExcel(in, file.getOriginalFilename());
// 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 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 "success"; // 上传成功则跳转至此success的信息
}
@RequestMapping("/download")
public void download(HttpServletRequest request, HttpServletResponse response) throws Exception {
response.setContentType("text/html;charset=UTF-8");
BufferedInputStream in = null;
BufferedOutputStream out = null;
request.setCharacterEncoding("UTF-8");
String path = request.getSession().getServletContext().getRealPath("/resources/");
String fileName = "template.xlsx";
try {
File f = new File(path + fileName);
response.setContentType("application/x-excel");
response.setCharacterEncoding("UTF-8");
response.setHeader("Content-Disposition", "attachment; filename=" + fileName);
response.setHeader("Content-Length", String.valueOf(f.length()));
in = new BufferedInputStream(new FileInputStream(f));
out = new BufferedOutputStream(response.getOutputStream());
byte[] data = new byte[1024];
int len = 0;
while (-1 != (len = in.read(data, 0, data.length))) {
out.write(data, 0, len);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (in != null) {
in.close();
}
if (out != null) {
out.close();
}
}
}
}
4、InfoVo.java(保存Excel数据对应的对象)
/**
*
*/
/**
* @author congliu
*
*/
package ad.web.bean;
//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;
}
}
前端就是个上传文件的控件就可以了,可以看前面转载的几篇文章,呵呵。