SpringBoot实现Excel导出

        <!--表格生成-->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.9</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>3.9</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.9</version>
        </dependency>

import com.example.blog.mapper.BlogMapper;
import com.example.blog.service.ITableService;
import com.example.blog.vo.ListBlogVO;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * @Author QingHao
 * @Date: 2022/06/09/ 13:19
 * @Describe
 */
@Service
public class TableServiceImpl{

    @Autowired
    private BlogMapper mapper;


    public XSSFWorkbook formGeneration() {
        //查询数据库中的数据
        List<ListBlogVO> listBlogVOS = mapper.listSelect();

        XSSFWorkbook xssfSheets = new XSSFWorkbook();

        XSSFSheet userList = xssfSheets.createSheet("userList");

        Row titleRow = userList.createRow(0);//创建第一行，起始为0
        titleRow.createCell(0).setCellValue("id");//第一列
        titleRow.createCell(1).setCellValue("用户id");
        titleRow.createCell(2).setCellValue("标题");
        titleRow.createCell(3).setCellValue("摘要");
        titleRow.createCell(4).setCellValue("创建时间");
        titleRow.createCell(5).setCellValue("status");


        for (int i = 0; i < listBlogVOS.size(); i++) {
            Row row = userList.createRow(i + 1);//设置对哪一行操作
            row.createCell(0).setCellValue(listBlogVOS.get(i).getId());
            row.createCell(1).setCellValue(listBlogVOS.get(i).getUserId());
            row.createCell(2).setCellValue(listBlogVOS.get(i).getTitle());
            row.createCell(3).setCellValue(listBlogVOS.get(i).getDescription());
            row.createCell(4).setCellValue(listBlogVOS.get(i).getCreated()+"");
            row.createCell(5).setCellValue(listBlogVOS.get(i).getStatus()+"");
        }

        return xssfSheets;
    }

}

import com.example.blog.service.ITableService;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

/**
 * @Author QingHao
 * @Date: 2022/06/09/ 13:28
 * @Describe
 */
@Slf4j
@Controller
public class TableDowloadController {

    @Autowired
    private ITableService tableService;

    /**
     * 表格生成器
     *
     * @param response
     */
    @GetMapping("/tableDowload")
    public void tableDowload(HttpServletResponse response) {
        log.debug("开始生成表格数据");
        XSSFWorkbook xssfSheets = tableService.formGeneration();

        String fileName = "Goods报表.xlsx";
        OutputStream outputStream = null;
        try {
            fileName = URLEncoder.encode(fileName, "UTF-8");
            //设置ContentType请求信息格式
            response.setContentType("application/vnd.ms-excel");
            response.setHeader("Content-disposition", "attachment;filename=" + fileName);
            outputStream = response.getOutputStream();
            xssfSheets.write(outputStream);
            outputStream.flush();
            outputStream.close();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}