easypoi 操做 excel 表格，這也太 easy 了吧

時間 2019-11-08

原文原文鏈接

what is easypoi?

easypoi是一款簡化版的poi工具，讓你不須要太多的poi知識就可以使用poi完成Excel和word的各類操做。html

easypoi官方文檔，點擊官方文檔java

怎使用`easypoi`？

１、建立一個`springboot`項目,在`pom.xml`中引入依賴

<dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-base</artifactId>
            <version>4.1.0</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-web</artifactId>
            <version>4.1.0</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-annotation</artifactId>
            <version>4.1.0</version>
        </dependency>
複製代碼

二、編寫`easypoiutil`

public class EasyPoiUtils {

    /** * 導出excel * @param pojoClass * @param dataSet * @param path * @param filename * @throws IOException */
    public static void exportExcel(Class<?> pojoClass, Collection<?> dataSet,String path,String filename) throws IOException {

        File savefile = new File(path);
        if (!savefile.exists()) {
            savefile.mkdirs();
        }
        Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams(), pojoClass, dataSet);
        FileOutputStream fos = new FileOutputStream(path+filename);
        workbook.write(fos);
        fos.close();
    }

    /** * 根據Map建立對應的Excel(一個excel 建立多個sheet) * @param list list 多個Map key title 對應表格Title key entity 對應表格對應實體 key data * * Collection 數據 * @param path 路徑 * @param filename&emsp;文件名 * @throws IOException */
    public static void exportExcel(List<Map<String, Object>> list,String path,String filename) throws IOException{
        File savefile = new File(path);
        if (!savefile.exists()) {
            savefile.mkdirs();
        }
        Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);

        FileOutputStream fos = new FileOutputStream(path+filename);
        workbook.write(fos);
        fos.close();
    }


    /** * 導入excel * @param file * @param pojoClass * @param params * @param <T> * @return */
    public static <T>List<T> importExcel(File file, Class<?> pojoClass, ImportParams params){
        long start = new Date().getTime();
        List<T> list = ExcelImportUtil.importExcel(file,UserEntity.class, params);
        return list;
    }
}
複製代碼

三、建立實體類

建立實體類，在須要導出的字段上添加@Excel註解。web

/** * 用戶實體類 */
public class UserEntity {

    @Excel(name = "ID")
    private int id;

    @Excel(name = "姓名")
    private String name;

    @Excel(name = "電子郵件",width = 20)
    private String email;

    @Excel(name = "年齡")
    private int age;

    @Excel(name = "性別",replace={"男_1", "女_2"})
    private int sex;

    @Excel(name = "操做時間",format="yyyy-MM-dd HH:mm:ss",width = 20)
    private Date time;

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public int getAge() {
        return age;
    }

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

    public int getSex() {
        return sex;
    }

    public void setSex(int sex) {
        this.sex = sex;
    }

    public Date getTime() {
        return time;
    }

    public void setTime(Date time) {
        this.time = time;
    }

    @Override
    public String toString() {
        return "UserEntity{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", email='" + email + '\'' +
                ", age=" + age +
                ", sex=" + sex +
                ", time=" + time +
                '}';
    }
}
複製代碼

註解說明:spring

四、測試

一、測試導出單個`sheet`

/** * 測試單sheet導出 * @throws IOException */
    public static void testExportExcel() throws IOException {
        List<UserEntity> list = new ArrayList<>();
        int i = 0;
        while (i < 10){
            UserEntity user = new UserEntity();
            user.setId(i+1);
            user.setAge(20+i);
            user.setEmail("abc@163.com");
            user.setName("張三"+i);
            user.setSex(i%2==0?1:2);
            user.setTime(new Date());
            list.add(user);
            i++;
        }
        EasyPoiUtils.exportExcel(UserEntity.class,list,"src/main/resources/excel/","user.xls");
    }
複製代碼

導出效果springboot

二、測試導出多個`sheet`

/** * 測試多sheet導出 * @throws IOException */
    public static void testExportExcels() throws IOException {
        List<Map<String, Object>> list = new ArrayList<>();
        for(int n=1;n<4;n++){
            ExportParams exportParams = new ExportParams("用戶信息"+n,"用戶信息"+n);
            Object entity = UserEntity.class;
            List<UserEntity> data = new ArrayList<>();
            int i = 0;
            while (i < 10){
                UserEntity user = new UserEntity();
                user.setId(i*n+1);
                user.setAge(20+i);
                user.setEmail("abc@163.com");
                user.setName("張三"+i*n);
                user.setSex(i%2==0?1:2);
                user.setTime(new Date());
                data.add(user);
                i++;
            }
            // 構建map
            Map<String,Object> map = new HashMap<>();
            map.put("title",exportParams);
            map.put("entity",entity);
            map.put("data",data);
            list.add(map);
        }
        EasyPoiUtils.exportExcel(list,"src/main/resources/excel/","user1.xls");
    }

複製代碼

導出效果:ide

三、測試導入`excel`

/** * 測試導入 */
    public static void testImportExcel(){
        List<UserEntity> list = EasyPoiUtils.importExcel(

                new File("src/main/resources/excel/user.xls"),
                UserEntity.class, new ImportParams());
        list.forEach((user)->{
            System.out.println(user);
        });

    }
複製代碼

導入時候可以直接幫咱們轉化爲實體類，這功能仍是很是讚的。咱們將結果輸出到控制檯，輸出信息以下:工具