Springboot 整合easyExcel导出excel表格数据

1.导入包

		
			com.alibaba
			easyexcel
			1.1.2-beta4
		
		
		
			org.apache.poi
			poi
			3.17
		
		
		
			org.apache.poi
			poi-ooxml
			3.17
		

 2.使用Excel工具类

import com.alibaba.excel.EasyExcelFactory;
import com.alibaba.excel.ExcelReader;
import com.alibaba.excel.ExcelWriter;
import com.alibaba.excel.metadata.BaseRowModel;
import com.alibaba.excel.metadata.Sheet;
import com.alibaba.excel.support.ExcelTypeEnum;
import org.springframework.web.multipart.MultipartFile;


import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

/**
 * ExcelUtil
 * 基于easyExcel的开源框架，poi版本3.17
 * BeanCopy ExcelException 属于自定义数据，属于可自定义依赖
 * 工具类尽可能还是需要减少对其他java的包的依赖
 * @author wenxuan.wang
 */
public class ExcelUtil {
    /**
     * 私有化构造方法
     */
    private ExcelUtil(){}

    /**
     * 读取 Excel(多个 sheet)
     * 将多sheet合并成一个list数据集，通过自定义ExcelReader继承AnalysisEventListener
     * 重写invoke doAfterAllAnalysed方法
     * getExtendsBeanList 主要是做Bean的属性拷贝 ，可以通过ExcelReader中添加的数据集直接获取
     * @param excel    文件
     * @param rowModel 实体类映射，继承 BaseRowModel 类
     * @return Excel 数据 list
     */
    public static  List readExcel(MultipartFile excel,Class  rowModel) throws ExcelException {
        ExcelListener excelListener = new ExcelListener();
        ExcelReader reader = getReader(excel, excelListener);
        if (reader == null) {
            return new ArrayList<>();
        }
        for (Sheet sheet : reader.getSheets()) {
            sheet.setClazz(rowModel);
            reader.read(sheet);
        }
        return getExtendsBeanList(excelListener.getDataList(),rowModel);
    }

    /**
     * 读取某个 sheet 的 Excel
     * @param excel    文件
     * @param rowModel 实体类映射，继承 BaseRowModel 类
     * @param sheetNo  sheet 的序号 从1开始
     * @return Excel 数据 list
     */
    public static  List readExcel(MultipartFile excel, Class  rowModel, int sheetNo)  throws ExcelException{
        return readExcel(excel, rowModel, sheetNo, 1);
    }

    /**
     * 读取某个 sheet 的 Excel
     * @param excel       文件
     * @param rowModel    实体类映射，继承 BaseRowModel 类
     * @param sheetNo     sheet 的序号 从1开始
     * @param headLineNum 表头行数，默认为1
     * @return Excel 数据 list
     */
    public static  List readExcel(MultipartFile excel, Class  rowModel, int sheetNo,
                                         int headLineNum) throws ExcelException {
        ExcelListener excelListener = new ExcelListener();
        ExcelReader reader = getReader(excel, excelListener);
        if (reader == null) {
            return new ArrayList<>();
        }
        reader.read(new Sheet(sheetNo, headLineNum, rowModel));
        return getExtendsBeanList(excelListener.getDataList(),rowModel);
    }

    /**
     * 导出 Excel ：一个 sheet，带表头
     * 自定义WriterHandler 可以定制行列数据进行灵活化操作
     * @param response  HttpServletResponse
     * @param list      数据 list，每个元素为一个 BaseRowModel
     * @param fileName  导出的文件名
     * @param sheetName 导入文件的 sheet 名
     */
	public static void writeExcel(HttpServletResponse response, List list, String fileName,
			String sheetName, BaseRowModel model,ExcelTypeEnum excelTypeEnum) throws Exception {
		ExcelWriter writer = new ExcelWriter(getOutputStream(fileName, response, excelTypeEnum),
				excelTypeEnum);
		Sheet sheet = new Sheet(1, 0, model.getClass());
		sheet.setSheetName(sheetName);
		writer.write(list, sheet);
		writer.finish();
	}

    /**
     * 导出 Excel ：多个 sheet，带表头
     * @param response  HttpServletResponse
     * @param list      数据 list，每个元素为一个 BaseRowModel
     * @param fileName  导出的文件名
     * @param sheetName 导入文件的 sheet 名
     * @param object    映射实体类，Excel 模型
     */
    public static ExcelWriterFactory writeExcelWithSheets(HttpServletResponse response, List list,
                                                          String fileName, String sheetName, BaseRowModel object, ExcelTypeEnum excelTypeEnum) throws ExcelException {
        ExcelWriterFactory writer = null;
		try {
			writer = new ExcelWriterFactory(getOutputStream(fileName, response,excelTypeEnum), excelTypeEnum);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
        Sheet sheet = new Sheet(1, 0, object.getClass());
        sheet.setSheetName(sheetName);
        writer.write(list, sheet);
        return writer;
    }

    /**
     * 导出文件时为Writer生成OutputStream
     * @throws Exception 
     */
    private static OutputStream getOutputStream(String fileName, HttpServletResponse response, ExcelTypeEnum excelTypeEnum) throws Exception{
        //创建本地文件
        try {
            fileName = URLEncoder.encode(fileName, "UTF-8");
            response.setContentType("application/vnd.ms-excel");
            response.setCharacterEncoding("utf8");
            response.setHeader("Content-Disposition", "attachment; filename=" + fileName + excelTypeEnum.getValue());
            response.setHeader("Pragma", "public");
            response.setHeader("Cache-Control", "no-store");
            response.addHeader("Cache-Control", "max-age=0");
            return response.getOutputStream();
        } catch (IOException e) {
            throw new Exception("导出excel表格失败!", e);
        }
    }

    /**
     * 返回 ExcelReader
     * @param excel         需要解析的 Excel 文件
     * @param excelListener new ExcelListener()
     */
    private static ExcelReader getReader(MultipartFile excel,
                                         ExcelListener excelListener) throws ExcelException{
        String fileName = excel.getOriginalFilename();
        if (fileName == null ) {
            throw new ExcelException("文件格式错误！");
        }
        if (!fileName.toLowerCase().endsWith(ExcelTypeEnum.XLS.getValue()) && !fileName.toLowerCase().endsWith(ExcelTypeEnum.XLSX.getValue())) {
            throw new ExcelException("文件格式错误！");
        }
        InputStream inputStream;
        try {
            inputStream = excel.getInputStream();
            return new ExcelReader(inputStream, null, excelListener, false);
        } catch (IOException e) {
            //do something
        }
        return null;
    }

    /**
     * 利用BeanCopy转换list
     */
    public static  List getExtendsBeanList(List list,Class typeClazz){
        return MyBeanCopy.convert(list,typeClazz);
    }
}

 3. 实体类(重点)

import java.util.Date;

import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.metadata.BaseRowModel;

import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

@Data //相当于get set方法,需要下载插件和包
public class ExportPerson extends BaseRowModel{
	@ApiModelProperty(value="姓名")
	@ExcelProperty(value = "姓名", index = 0)
	private String personName;
	@ApiModelProperty(value="身份证号")
	@ExcelProperty(value = "身份证号", index = 1)
	private String idCardNumber;
	@ApiModelProperty(value="手机号")
	@ExcelProperty(value = "手机号", index = 2)
	private String phoneNumber;
	
	@ApiModelProperty(value="现住址")
	@ExcelProperty(value = "现住址", index = 3)
	private String presentAddress;
}

 通过 @ExcelProperty注释声明导出文元素 value列名 ,index 列的序号

4. 控制层写法

@RequestMapping("exportPersonData")
public void exportPersonData(HttpServletResponse response){
      List list =  personDao.personsList();
String fileName = "文件名";
String sheet = "表名";
ExcelUtil.writeExcel(response,list,fileName,sheet,new ExportPerson(), ExcelTypeEnum.XLS);
}

 最后导出excel文件,当然也有excel文件读取,在此不多赘述,感兴趣得到可以自己研究