java 根据excel模板导出文件

Posted 2020-11-23 漫步CODE人生

<!--读取excel文件,配置POI框架的依赖-->
		<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>

　　

 

 

package com.example.demo;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

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.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.core.io.ClassPathResource;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping(value = "/index")
public class IndexController {
	
	@RequestMapping(value = "/excel2007Export")
	public ResponseEntity<Resource> excel2007Export(HttpServletResponse response, HttpServletRequest request) 
	{
		try
		{
			ClassPathResource cpr = new ClassPathResource("/student.xlsx");
			InputStream is = cpr.getInputStream();
			Workbook workbook = new XSSFWorkbook(is);
			org.apache.poi.ss.usermodel.Sheet sheet0 = workbook.getSheetAt(0);
			// 这里作为演示，造几个演示数据，模拟数据库里查数据
			List<String> list = new ArrayList<String>();
			list.add("张三");
			list.add("张四");
			list.add("王五");
			for (int i = 0; i < list.size(); i++) 
			{
				Row row = sheet0.createRow(i + 5);
				row.createCell(0).setCellValue(i);
				row.createCell(1).setCellValue(list.get(i));
			}
			String fileName = "eeeee.xlsx";
			downLoadExcel(fileName, response, workbook);

		} 
		catch (FileNotFoundException e) 
		{
			e.printStackTrace();
		} 
		catch (IOException e)
		{
			e.printStackTrace();
		}
		return new ResponseEntity<Resource>(HttpStatus.OK);
	}

	public static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) 
	{
		try 
		{
			response.setCharacterEncoding("UTF-8");
			response.setHeader("content-Type", "application/vnd.ms-excel");
			response.setHeader("Content-Disposition",
					"attachment;filename="" + URLEncoder.encode(fileName, "UTF-8") + """);
			workbook.write(response.getOutputStream());
		} 
		catch (IOException e)
		{
			e.printStackTrace();
		}
	}

	@RequestMapping(value = "/exportExcel", method = { RequestMethod.GET, RequestMethod.POST })
	public void exportExcel(HttpServletResponse response) throws UnsupportedEncodingException {
		String fileName = "导出excel.xls";
		response.setContentType("application/excel");
		response.setHeader("Content-disposition",
				"attachment;filename=" + fileName + ";filename*=utf-8‘‘" + URLEncoder.encode(fileName, "UTF-8"));
		HSSFWorkbook workbook = new HSSFWorkbook();
		HSSFSheet sheet = workbook.createSheet();
		int rowNum = 0;
		// 添加标题
		String[] headers = { "标题", "版块", "作者", "创建时间", "内容" };
		HSSFRow row = sheet.createRow(rowNum);
		List<String> list = new ArrayList<String>();
		list.add("111");
		list.add("222");
		list.add("333");
		for (String text : list) {
			HSSFRow row1 = sheet.createRow(rowNum);
			row1.createCell(0).setCellValue(rowNum);
			row1.createCell(1).setCellValue(text);
			rowNum++;
		}

		try {
			workbook.write(response.getOutputStream());
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}