EasyPOI是一款优秀的开源Java库,专为简化和优化Excel文件的导入导出操作而设计。下面,我会介绍EasyPOI在项目中使用EasyPOI,实现Excel文件的高效操作。帮助读者全面了解和掌握这一工具。
官网:
http://www.wupaas.com/
开发指南:
http://doc.wupaas.com/docs/easypoi/easypoi-1c0u4mo8p4ro8
Gitee:
https://gitee.com/lemur/easypoi#https://gitee.com/link?target=http%3A%2F%2Fwww.wupaas.com%2F
EasyPOI的目标是做到比Apache POI更简单,降低Excel导入导出时的复杂度。其主要特点如下:
使用EasyPOI之前,需要将其作为依赖加入到你的项目中。如果你使用Maven,可以在pom.xml中加入如下依赖:
cn.afterturn
easypoi-base
4.2.0
cn.afterturn
easypoi-web
4.2.0
cn.afterturn
easypoi-annotation
4.2.0
org.springframework.boot
spring-boot-starter-web
org.mybatis.spring.boot
mybatis-spring-boot-starter
2.2.0
mysql
mysql-connector-java
5.1.47
org.projectlombok
lombok
org.springframework.boot
spring-boot-starter-thymeleaf
Create Table
CREATE TABLE `user` (
`id` int(10) NOT NULL AUTO_INCREMENT COMMENT '编号',
`name` varchar(255) DEFAULT NULL COMMENT '姓名',
`bir` timestamp NULL DEFAULT NULL COMMENT '出生日期',
`photo` varchar(150) DEFAULT NULL COMMENT '头像',
`habbys` varchar(100) DEFAULT NULL COMMENT '爱好',
`cardno` varchar(18) DEFAULT NULL COMMENT '身份证号',
`address` varchar(60) DEFAULT NULL COMMENT '住址',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8
Field | Type | Comment | |
主键 | id | int(10) NOT NULL | 编号 |
name | varchar(255) NULL | 姓名 | |
bir | timestamp NULL | 出生日期 | |
photo | varchar(150) NULL | 头像 | |
habbys | varchar(100) NULL | 爱好 | |
cardno | varchar(18) NULL | 身份证号 | |
address | varchar(60) NULL | 住址 |
mybatis.mapper-locations=classpath:mapper/*Mapper.xml
mybatis.type-aliases-package=com.yu.pojo
server.port=8081
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.password=root
spring.datasource.url=jdbc:mysql://localhost:3306/EasyPOI
spring.datasource.username=root
spring.thymeleaf.cache=false
spring.servlet.multipart.max-file-size=10MB
spring.servlet.multipart.max-request-size=10MB
@Data
@ExcelTarget("users")
public class User implements Serializable {
@Excel(name = "编号")
private String id;
@Excel(name = "姓名")
private String name;
@Excel(name = "生日", format = "yyyy年MM月dd日")
private Date bir;
@Excel(name = "头像信息", type = 2, savePath = "src/main/resources/static/images")
private String photo;
@Excel(name = "爱好", width = 12.0)
private String habbys;
@Excel(name = "身份证号", width = 15.0)
private String cardno;
@Excel(name = "家庭住址", width = 15.0)
private String address;
}
@Mapper
public interface UserMapper {
//查询所有
List findAll();
//插入记录
void save(User user);
}
insert into user values (#{id},#{name},#{bir},#{photo},#{habbys},#{cardno},#{address})
public interface UserService {
List findAll();
//批量保存
void saveAll(List users);
}
@Service
@Transactional
public class UserServiceImpl implements UserService {
@Autowired
private UserMapper userMapper;
@Override
public List findAll() {
return userMapper.findAll();
}
@Override
public void saveAll(List users) {
users.forEach(user -> {
user.setId(null);
user.setPhoto(user.getPhoto().substring(user.getPhoto().lastIndexOf("\\") + 1));
System.out.println(user.getPhoto());
userMapper.save(user);
});
}
}
@SpringBootApplication
public class EasyPOIApplication {
public static void main(String[] args) {
SpringApplication.run(EasyPOIApplication.class, args);
}
}
导入excel的主页面
选择Excel文件导入到数据中
@Controller
@RequestMapping("/user")
@Slf4j
public class UserController {
@Autowired
private UserService userService;
//查询所有
@RequestMapping("/findAll")
public String findAll(HttpServletRequest request){
List users = userService.findAll();
request.setAttribute("users",users);
return "index";
}
//导入excel
@RequestMapping("/import")
public String importExcel(MultipartFile excelFile) throws Exception {
log.info("文件名称: [{}]",excelFile.getOriginalFilename());
ImportParams params = new ImportParams();
params.setTitleRows(1);//设置一级标题行为1行
params.setHeadRows(1);//设置header标题为1行
List users;
try (InputStream inputStream = excelFile.getInputStream()) {
users = ExcelImportUtil.importExcel(inputStream, User.class, params);
}
log.info("导入总数为: [{}]", users.size());
userService.saveAll(users);
return "redirect:/user/findAll";
}
//导出excel
@RequestMapping("/export")
public void exportExcel(HttpServletResponse response, HttpServletRequest request) throws IOException {
List users = userService.findAll();
users.forEach(user -> {
try {
Excel excelAnn = user.getClass().getDeclaredField("photo").getAnnotation(Excel.class);
user.setPhoto(excelAnn.savePath()+'/'+user.getPhoto());
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
});
Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams("用户列表", "用户信息"), User.class, users);
response.setHeader("content-disposition","attachment;fileName="+ URLEncoder.encode("用户信息表.xls","UTF-8"));
ServletOutputStream os = response.getOutputStream();
workbook.write(os);
os.close();
workbook.close();
}
}
导入之前
导入中
导入之后
Excel查看
项目结构
EasyPOI提供了一套非常简单而强大的解决方案,用于处理Java中Excel的导入导出。它的易用性让开发人员可以更加关注业务逻辑,而不是被繁琐的数据处理细节所困扰。无论你是需要处理简单的数据列表,还是复杂的业务报表,EasyPOI都可以帮助你高效完成任务。
希望这篇博文能够帮助你开始使用EasyPOI来提升你的工作效率。当然,实际应用中,你还需要根据自己的具体场景去深入学习和掌握更多细节和技巧。