Java 导出Excel

maven依赖

        <!--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>

代码

package com.cyb.exceldemo.excel;

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 ExcelController {
    @RequestMapping(value = "/excel2007Export")
    public ResponseEntity<Resource> excel2007Export(HttpServletResponse response, HttpServletRequest request)
    {
        try
        {
            ClassPathResource cpr = new ClassPathResource("/static/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();
        }
    }
}

注意需要有Excel模板