EasyExcel使用

Posted 2021-06-03 云村的王子

将下面三层结合起来，请放心食用。

一、controller层

@RestController
public class EasyExcelController
{
    private Logger logger = LogManager.getLogger(EasyExcelController.class);

    @RequestMapping(value = "/Download")
    public void testExcelDownload(HttpServletResponse response)
    {
        //实际项目中,personList可以从数据库查出或者前端传过来
        //在这里用于测试
        List<Person> personList = new ArrayList<>();
        for (int i = 1; i < 5; i++)
        {
            Person person = new Person();
            person.setId(i);
            person.setName(i + "号杰瑞");
            person.setAge(i);
            person.setAddress(i + "号石华街");
            person.setDate(new Date());
            personList.add(person);
        }
        try
        {
            String fileName = "数据"; // Excel文件名称
            String sheetName = "欢乐番茄"; // 工作簿名称
            EasyExcelUtil.writeExcel(response, personList, fileName, sheetName, Person.class);
        }
        catch (Exception e)
        {
            logger.error("模板下载失败", e);
        }

    }

}

二、工具类

public class EasyExcelUtil
{

    public static OutputStream getOutputStream(String fileName, HttpServletResponse response)
        throws Exception
    {
        try
        {
            fileName = URLEncoder.encode(fileName, "utf-8");
            response.setContentType("application/vnd.ms-excel");
            response.setCharacterEncoding("utf-8");
            // 此处指定了文件类型为xls，如果是xlsx的，请自行替换修改
            response.setHeader("Content-Disposition", "attachment; filename=" + fileName + ".xls");
            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("导出文件失败！");
        }
    }

    public static void writeExcel(HttpServletResponse response, List list, String fileName,
        String sheetName, Class clazz)
        throws Exception
    {
        ExcelWriter writer = new ExcelWriter(getOutputStream(fileName, response), ExcelTypeEnum.XLS);

        Sheet sheet = new Sheet(1, 0, clazz);
        sheet.setSheetName(sheetName);
        writer.write(list, sheet);
        writer.finish();
    }
}

三、实体类

@Data
//自定义标题行高
@HeadRowHeight(30)
//自定义标题字体大小 默认14
@HeadFontStyle(fontHeightInPoints = 15)
//自定义文本内容行高
@ContentRowHeight(20)
//自定义文本字体大小 默认14
@ContentFontStyle(fontHeightInPoints = 10)
public class Person
{

    //忽略这个字段
    @ExcelIgnore
    private Integer id;

    @ExcelProperty({"数据统计", "姓名"})
    private String name;

    @ExcelProperty({"数据统计", "年龄"})
    private Integer age;

    @ExcelProperty({"数据统计", "家庭地址"})
    @ColumnWidth(15)
    private String address;

    //默认 yyyy-MM-dd HH:mm:ss  可以使用DateTimeFormat自定义日期格式
    @DateTimeFormat("yyyy年MM月dd日")
    //自定义列宽
    @ColumnWidth(15)
    @ExcelProperty("日期")
    private Date date;

    public Date getDate()
    {
        return date;
    }

    public void setDate(Date date)
    {
        this.date = date;
    }

    public Integer getId()
    {
        return id;
    }

    public void setId(Integer id)
    {
        this.id = id;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public Integer getAge()
    {
        return age;
    }

    public void setAge(Integer age)
    {
        this.age = age;
    }

    public String getAddress()
    {
        return address;
    }

    public void setAddress(String address)
    {
        this.address = address;
    }

    @Override
    public String toString()
    {
        return "Person{" +
            "id=" + id +
            ", name=\'" + name + \'\\\'\' +
            ", age=" + age +
            ", address=\'" + address + \'\\\'\' +
            ", date=" + date +
            \'}\';
    }
}