导入依赖

java"><dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>4.0.1</version>
</dependency>

1、alibaba.excel.EasyExcel导出工具类 

java">import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;import javax.servlet.http.HttpServletResponse;
import java.net.URLEncoder;
import java.util.List;public class ExcelUtil {/*** 导出excel** @param response 响应* @param list 数据集* @param clazz 类名* @param fileName 文件名* @return*/public static<T> void exportExcel(HttpServletResponse response, List<T> list, Class<T> clazz, String fileName) {try {response.setCharacterEncoding("utf-8");response.setContentType("application/vnd.ms-excel;charset=UTF-8");response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode(fileName, "utf-8") + ".xlsx");EasyExcel.write(response.getOutputStream(), clazz).registerWriteHandler(new LongestMatchColumnWidthStyleStrategy())//自适应表格格式.sheet("sheet1").doWrite(list);}catch (Exception e){throw new RuntimeException(e.getMessage());}}
}

 2、controller层

java">   @GetMapping("/export")public void exportExcel(HttpServletResponse response,OpreationLogEntity opreationLogEntity){List<OpreationLogEntity> oprLogList = opreationLogService.findOprLogList(opreationLogEntity);ExcelUtil.exportExcel(response,oprLogList,OpreationLogEntity.class,"系统日志");}

3、实体类字段加上注解：

（1）@ExcelIgnore：表示忽略导出该字段数据

（2）@ExcelProperty("账号")：导出对应的字段数据，并且设置Excel属性表头名，

        举例--对应的表头名为：账号

（3）不加注解：例如sysModule字段，会导出该数据，但是表头名为sysModule

java">@Data
public class OpreationLogEntity{@ExcelIgnoreprivate Long id;@ExcelProperty("账号")private String opreCode;private String sysModule;
}

3、测试：浏览器地址栏输入url即可导出成功