一、需要準備的maven依賴：
<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>
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>二、準備的jsp：
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="s" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
</head>
<body>
<form name="form" METHOD="POST" ACTION="/ReadExcel/dealExcel/upload" ENCTYPE="multipart/form-data">
請選擇你要上傳的文件：<input name="attach" type="FILE" id="attach" size="50" ><br>
<input type="submit" value="提交">
</form>
</body>
</html>三、需要的util類：
package com.sunzy.project.xlsx.util;
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 java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
public class POIUtil
{
private final static String xls = "xls";
private final static String xlsx = "xlsx";
/**
* 讀入excel文件，解析後返回
* @param file
* @throws IOException
*/
public static List<String[]> readExcel(MultipartFile file) throws IOException {
//檢查文件
checkFile(file);
//獲得Workbook工作薄對象
Workbook workbook = getWorkBook(file);
//創建返回對象，把每行中的值作爲一個數組，所有行作爲一個集合返回
List<String[]> list = new ArrayList<String[]>();
if(workbook != null){
for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){
//獲得當前sheet工作表
Sheet sheet = workbook.getSheetAt(sheetNum);
if(sheet == null){
continue;
}
//獲得當前sheet的開始行
int firstRowNum = sheet.getFirstRowNum();
//獲得當前sheet的結束行
int lastRowNum = sheet.getLastRowNum();
//循環除了第一行的所有行
for(int rowNum = firstRowNum+1;rowNum <= lastRowNum;rowNum++){
//獲得當前行
Row row = sheet.getRow(rowNum);
if(row == null){
continue;
}
//獲得當前行的開始列
int firstCellNum = row.getFirstCellNum();
//獲得當前行的列數
int lastCellNum = row.getPhysicalNumberOfCells();
String[] cells = new String[row.getPhysicalNumberOfCells()];
//循環當前行
for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
Cell cell = row.getCell(cellNum);
cells[cellNum] = getCellValue(cell);
}
list.add(cells);
}
}
workbook.close();
}
return list;
}
public static void checkFile(MultipartFile file) throws IOException{
//判斷文件是否存在
if(null == file){
throw new FileNotFoundException("文件不存在！");
}
//獲得文件名
String fileName = file.getOriginalFilename();
//判斷文件是否是excel文件
if(!fileName.endsWith(xls) && !fileName.endsWith(xlsx)){
throw new IOException(fileName + "不是excel文件");
}
}
public static Workbook getWorkBook(MultipartFile file) {
//獲得文件名
String fileName = file.getOriginalFilename();
//創建Workbook工作薄對象，表示整個excel
Workbook workbook = null;
try {
//獲取excel文件的io流
InputStream is = file.getInputStream();
//根據文件後綴名不同(xls和xlsx)獲得不同的Workbook實現類對象
if(fileName.endsWith(xls)){
//2003
workbook = new HSSFWorkbook(is);
}else if(fileName.endsWith(xlsx)){
//2007
workbook = new XSSFWorkbook(is);
}
} catch (IOException e) {
}
return workbook;
}
public static String getCellValue(Cell cell){
String cellValue = "";
if(cell == null){
return cellValue;
}
//把數字當成String來讀，避免出現1讀成1.0的情況
if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){
cell.setCellType(Cell.CELL_TYPE_STRING);
}
//判斷數據的類型
switch (cell.getCellType()){
case Cell.CELL_TYPE_NUMERIC: //數字
cellValue = String.valueOf(cell.getNumericCellValue());
break;
case Cell.CELL_TYPE_STRING: //字符串
cellValue = String.valueOf(cell.getStringCellValue());
break;
case Cell.CELL_TYPE_BOOLEAN: //Boolean
cellValue = String.valueOf(cell.getBooleanCellValue());
break;
case Cell.CELL_TYPE_FORMULA: //公式
cellValue = String.valueOf(cell.getCellFormula());
break;
case Cell.CELL_TYPE_BLANK: //空值
cellValue = "";
break;
case Cell.CELL_TYPE_ERROR: //故障
cellValue = "非法字符";
break;
default:
cellValue = "未知類型";
break;
}
return cellValue;
}
}四、最後是driver，具有上傳和下載的功能:
package com.sunzy.project.xlsx;
import java.io.OutputStream;
import java.util.Arrays;
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.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import jxl.Workbook;
import jxl.format.Alignment;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
@Controller
@RequestMapping(value = "dealExcel")
public class DealExcel {
@RequestMapping(value = "upload")
public void upload(HttpServletRequest request, HttpServletResponse response) throws Exception {
MultipartHttpServletRequest mRequest = (MultipartHttpServletRequest) request;
MultipartFile file = mRequest.getFile("file");
Workbook workbook = Workbook.getWorkbook(file.getInputStream());
//遍歷Sheet頁
Arrays.stream(workbook.getSheets())
.forEach(sheet -> {
int size = sheet.getRows();
for(int i=0; i<size; i++){
//遍歷每一行，讀取每列信息
Arrays.stream(sheet.getRow(i)).forEach(cell -> System.out.print(cell.getContents()+" "));
System.out.println();
}
});
workbook.close();
response.setHeader("Content-Disposition", "attachment; filename=return.xls");
WritableWorkbook writableWorkbook = ExcelUtils.createTemplate(response.getOutputStream());
writableWorkbook.write();
writableWorkbook.close();
}
@RequestMapping(value = "download")
public void download(HttpServletRequest request, HttpServletResponse response) throws Exception{
response.setHeader("Content-Disposition", "attachment; filename=template.xls");
WritableWorkbook writableWorkbook = ExcelUtils.createTemplate(response.getOutputStream());
writableWorkbook.write();
writableWorkbook.close();
}
static class ExcelUtils {
public static WritableWorkbook createTemplate(OutputStream output) throws Exception {
WritableWorkbook writableWorkbook= Workbook.createWorkbook(output);
WritableSheet wsheet = writableWorkbook.createSheet("測試title", 0);
writableWorkbook.getSheet(0).getCell(1, 0).getCellFormat();
WritableCellFormat wc = new WritableCellFormat();
// 設置居中
wc.setAlignment(Alignment.CENTRE);
// 設置邊框線
// wc.setBorder(Border.ALL, BorderLineStyle.THIN);
wc.setBackground(jxl.format.Colour.GREEN);
Label nc0 = new Label(0, 0, "卡號",wc);//Label(x,y,z)其中x代表單元格的第x+1列，第y+1行, 單元格的內容是z
Label nc1 = new Label(1, 0, "金額",wc);
Label nc3 = new Label(0, 1, "12312311231231");
Label nc4 = new Label(1, 1, "100");
Label nc5 = new Label(0, 2, "12312311231200");
Label nc6 = new Label(1, 2, "100");
wsheet.addCell(nc0);
wsheet.addCell(nc1);
wsheet.addCell(nc3);
wsheet.addCell(nc4);
wsheet.addCell(nc5);
wsheet.addCell(nc6);
return writableWorkbook;
}
}
}結語：請自行配置SpringMvc的運行環境；
