教你如何使用JAVA POI
一、導入jar包
所需jar包，在pom中添加如下坐標即可
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency>
註意：
操作Excel文件區分版本：
2003版本（包含2003）以前的擴展名為.xls需要用HSSFWorkbook類操作
2007版本（包含2007）以後的擴展名為.xlsx需要用XSSFWorkbook類操作
二、導出
2007版本（包含2007）以後的擴展名為.xlsx需要用XSSFWorkbook類操作
2003版本（包含2003）以前的擴展名為.xls需要用HSSFWorkbook類操作
和 07基本相似 就是把XSSFWorkbook換成HSSFWorkbook
後綴名改成 點xls
package com.zph.poi;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import org.springframework.stereotype.Service;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URI;
import java.net.URLEncoder;
@Service
public class PoiServiceImpl {
public void exportExcel2007() throws IOException {
//創建工作簿 類似於創建Excel文件
XSSFWorkbook workbook=new XSSFWorkbook();
//創建 sheetname頁名
XSSFSheet sheet = workbook.createSheet("員工信息");
sheet.setColumnWidth(3,20*256);//給第3列設置為20個字的寬度
sheet.setColumnWidth(4,20*256);//給第4列設置為20個字的寬度
//創建一行,下標從0開始
XSSFRow row = sheet.createRow(0);
//創建這行中的列,下標從0開始 （表頭）
XSSFCell cell = row.createCell(0);
// 給cell 0下表賦值
cell.setCellValue("姓名");
//創建這行中的列,並給該列直接賦值
row.createCell(1).setCellValue("年齡");
row.createCell(2).setCellValue("性別");
row.createCell(3).setCellValue("生日");
row.createCell(4).setCellValue("手機號");
// 設置表裡內容
row = sheet.createRow(1);
row.createCell(0).setCellValue("T");
row.createCell(1).setCellValue("保密");
row.createCell(2).setCellValue("男");
row.createCell(3).setCellValue("保密");
row.createCell(4).setCellValue("12121212121");
row = sheet.createRow(2);
row.createCell(0).setCellValue("T");
row.createCell(1).setCellValue("18");
row.createCell(2).setCellValue("女");
row.createCell(3).setCellValue("2000-01-01");
row.createCell(4).setCellValue("12121212122");
//設定 路徑
File file = new File("D:\\zph\\temp\\員工信息2007.xlsx");
FileOutputStream stream = new FileOutputStream(file);
// 需要拋異常
workbook.write(stream);
//關流
stream.close();
}
public void exportExcel2003() throws IOException {
//創建工作簿 類似於創建Excel文件
HSSFWorkbook workbook=new HSSFWorkbook();
//創建 sheetname頁名
HSSFSheet sheet = workbook.createSheet("員工信息");
//創建一行,下標從0開始
HSSFRow row = sheet.createRow(0);
//創建這行中的列,下標從0開始 （表頭）
HSSFCell cell = row.createCell(0);
// 給cell 0下表賦值
cell.setCellValue("姓名");
//創建這行中的列,並給該列直接賦值
row.createCell(1).setCellValue("年齡");
row.createCell(2).setCellValue("性別");
row.createCell(3).setCellValue("生日");
row.createCell(4).setCellValue("手機號");
// 設置表裡內容
row = sheet.createRow(1);
row.createCell(0).setCellValue("T");
row.createCell(1).setCellValue("保密");
row.createCell(2).setCellValue("男");
row.createCell(3).setCellValue("保密");
row.createCell(4).setCellValue("12121212121");
row = sheet.createRow(2);
row.createCell(0).setCellValue("T");
row.createCell(1).setCellValue("18");
row.createCell(2).setCellValue("女");
row.createCell(3).setCellValue("2000-01-01");
row.createCell(4).setCellValue("12121212122");
//第一種導出 給定路徑
//1設定 路徑 創建文件讀進來在寫內容
File file = new File("D:\\zph\\temp\\員工信息2003.xls");
FileOutputStream stream = new FileOutputStream(file);
// 需要拋異常
workbook.write(stream);
//關流
stream.close();
}
public void exportExcel2003(HttpServletRequest request, HttpServletResponse response) throws IOException {
//第二種導出 從項目中獲取模板
//String realPath = request.getSession().getServletContext().getRealPath("/");
Resource resource = new ClassPathResource("templates/員工信息2003Tem.xls");//jar包獲取
//創建工作簿 類似於創建Excel文件
HSSFWorkbook workbookTem=new HSSFWorkbook(resource.getInputStream());
//創建 sheetname頁名
HSSFSheet sheetTem = workbookTem.getSheet("員工信息");
//HSSFSheet sheetTem = workbookTem.getSheetAt(0);
HSSFRow rowTem = sheetTem.createRow(1);
rowTem.createCell(0).setCellValue("xmtem");
rowTem.createCell(1).setCellValue("nltem");
rowTem.createCell(2).setCellValue("xbtem");
rowTem.createCell(3).setCellValue("srtem");
rowTem.createCell(4).setCellValue("sjhtem");
ServletOutputStream outputStream = response.getOutputStream();
response.reset();
String fileName = URLEncoder.encode("員工信息TemOut.xls", "utf-8");
response.setHeader("Content-disposition","attachment;filename="+fileName);
response.setContentType("application/x-download;charset=UTF-8");
// 對響應客戶請求進行重新編碼11
//response.setCharacterEncoding("utf-8");
workbookTem.write(outputStream);
outputStream.close();
}
public String exportExcel2003(String s,HttpServletRequest request, HttpServletResponse response) throws IOException {
//第三種直接導出
//創建工作簿 類似於創建Excel文件
HSSFWorkbook workbookTem=new HSSFWorkbook();
//創建 sheetname頁名
HSSFSheet sheet = workbookTem.createSheet("員工信息");
//創建一行,下標從0開始
HSSFRow row = sheet.createRow(0);
//創建這行中的列,下標從0開始 （表頭）
HSSFCell cell = row.createCell(0);
// 給cell 0下表賦值
cell.setCellValue("姓名");
//創建這行中的列,並給該列直接賦值
row.createCell(1).setCellValue("年齡");
row.createCell(2).setCellValue("性別");
row.createCell(3).setCellValue("生日");
row.createCell(4).setCellValue("手機號");
// 設置表裡內容
row = sheet.createRow(1);
row.createCell(0).setCellValue("T");
row.createCell(1).setCellValue("保密");
row.createCell(2).setCellValue("男");
row.createCell(3).setCellValue("保密");
row.createCell(4).setCellValue("12121212121");
row = sheet.createRow(2);
row.createCell(0).setCellValue("T");
row.createCell(1).setCellValue("18");
row.createCell(2).setCellValue("女");
row.createCell(3).setCellValue("2000-01-01");
row.createCell(4).setCellValue("12121212122");
ServletOutputStream outputStream = response.getOutputStream();
response.reset();
String fileName = URLEncoder.encode("員工信息TemOut.xls", "utf-8");
response.setHeader("Content-disposition","attachment;filename="+fileName);
//response.setContentType("application/x-download;charset=UTF-8");
response.setContentType("application/vnd.ms-excel");
//response.setContentType("application/msexcel");
// 對響應客戶請求進行重新編碼11
//response.setCharacterEncoding("utf-8");
workbookTem.write(outputStream);
outputStream.close();
return s;
}
}
三、導出
@RequestMapping(value="/upload")
public String uploadExcel(@RequestParam("fileData") MultipartFile file, HttpServletRequest request, HttpServletResponse response) throws Exception {
InputStream in = file.getInputStream();
String s = poiService.uploadExcel(file, request, response);
return s;
}
public String uploadExcel(MultipartFile file, HttpServletRequest request, HttpServletResponse response) throws Exception {
InputStream in = file.getInputStream();
//D:\zph\temp
// 多態 拋異常
//Workbook sheets = new XSSFWorkbook(stream);
HSSFWorkbook sheets = new HSSFWorkbook(in);
//獲取一個工作表(sheet頁)，下標從0開始
HSSFSheet sheet = sheets.getSheetAt(0);
for (int i = 1; i<=sheet.getLastRowNum() ; i++) {
// 獲取行數
Row row = sheet.getRow(i);
// 獲取單元格 取值
String value1 = row.getCell(0).getStringCellValue();
String value2 = row.getCell(1).getStringCellValue();
String value3 = row.getCell(2).getStringCellValue();
String value4 = row.getCell(3).getStringCellValue();
String value5= row.getCell(4).getStringCellValue();
System.out.println(value1);
System.out.println(value2);
System.out.println(value3);
System.out.println(value4);
System.out.println(value5);
}
//關流
sheets.close();
in.close();
return "hha";
}
postman 設置 post請求 請求頭 Content-Type multipart/form-data
到此這篇關於教你如何使用JAVA POI的文章就介紹到這瞭,更多相關JAVA POI內容請搜索WalkonNet以前的文章或繼續瀏覽下面的相關文章希望大傢以後多多支持WalkonNet！
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