POI从入门到实战轻松完成EasyExcel使用及Excel导入导出功能

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>easyexcel</artifactId>
    <version>3.3.2</version>
</dependency>

@Data
public class SysUserData {
    @ExcelProperty("用户姓名")
    private String uname;
    @ExcelProperty("真实姓名")
    private String iphone;
    @ExcelProperty("用户名")
    private String realName;
    @ExcelProperty("密码")
    private String ipassword;
    @ExcelProperty("登陆ip")
    private String lastloginip;
    @ExcelProperty("登录时间")
    private String lastlogintime;
    @ExcelProperty("登陆次数")
    private String logintimes;
    @ExcelProperty("账号状态")
    private int state;
}

/**
     * easyExcl
     * 导入excel
     * @return
     */
    @RequestMapping(value = "/easyExcelImport")
    public List<SysUser> easyExcelImport() {
        List<SysUser> uList = null;
        try {
            uList = new ArrayList<>();
            String filePath = "/Users/admin/Desktop/user.xlsx";
            List<SysUserData> userList = EasyExcel.read(filePath).head(SysUserData.class).sheet().doReadSync();
            for (SysUserData user : userList) {
                SysUser sysUser = new SysUser();
                sysUser.setUname(user.getUname());
                sysUser.setRealName(user.getRealName());
                sysUser.setIphone(user.getIphone());
                sysUser.setIpassword(user.getIpassword());
                sysUser.setLastloginip(user.getLastloginip());
                sysUser.setLastlogintime(DateUtils.DateTimeToTimestamp(String.valueOf(user.getLastlogintime())));
                sysUser.setLogintimes(user.getLogintimes());
                sysUser.setState(user.getState());
                userService.addUser(sysUser);
                uList.add(sysUser);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return uList;
    }

 /**
     * easyexcel
     * 导出
     * @param response
     * @throws IOException
     */
    @RequestMapping(value = "/easyExcelWrite")
    public void easyExcelWrite(HttpServletResponse response) throws IOException {
        response.setCharacterEncoding("utf-8");
        long timestamp = System.currentTimeMillis() / 1000;
        String fileName = "用户信息_" + timestamp + ".xlsx";
        String encodedFileName = URLEncoder.encode(fileName, "UTF-8");
        response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + encodedFileName);
        List<SysUserData> dataList = new ArrayList<SysUserData>();
        // 数据
        List<SysUser> userList = userService.userList();
        for (SysUser user : userList) {
            SysUserData SysUserData = new SysUserData();
            SysUserData.setUname(user.getUname());
            SysUserData.setRealName(user.getRealName());
            SysUserData.setIphone(user.getIphone());
            SysUserData.setIpassword(user.getIpassword());
            SysUserData.setLastloginip(user.getLastloginip());
            SysUserData.setLastlogintime(DateUtils.TimestampToDateTime(user.getLastlogintime()));
            SysUserData.setLogintimes(user.getLogintimes());
            SysUserData.setState(user.getState());
            dataList.add(SysUserData);
        }
        HorizontalCellStyleStrategy horizontalCellStyleStrategy = new HorizontalCellStyleStrategy(StyleUtils.getHeadStyle(), StyleUtils.getContentStyle());
        try (
        ExcelWriter excelWriter = EasyExcel.write(response.getOutputStream(), SysUserData.class)
                .registerWriteHandler(new CellWriteWidthConfig()) // 自适应列宽
                .registerWriteHandler(new CellWriteHeightConfig()) // 自适应行高
                .registerWriteHandler(horizontalCellStyleStrategy)
                .build()) {
            excelWriter.write(dataList, EasyExcel.writerSheet("用户信息").build());
        }catch (IOException e) {
            throw new RuntimeException(e);
        }
    }