easypoi 操作 excel 表格，这也太 easy 了吧
what is easypoi?
easypoi是一款简化版的poi工具，让你不需要太多的poi知识就能够使用poi完成Excel和word的各种操作。
easypoi官方文档，点击官方文档
怎使用easypoi？
１、创建一个springboot项目,在pom.xml中引入依赖
<dependency>
<groupId>cn.afterturngroupId>
<artifactId>easypoi-baseartifactId>
<version>4.1.0version>
dependency>
<dependency>
<groupId>cn.afterturngroupId>
<artifactId>easypoi-webartifactId>
<version>4.1.0version>
dependency>
<dependency>
<groupId>cn.afterturngroupId>
<artifactId>easypoi-annotationartifactId>
<version>4.1.0version>
dependency>
2、编写easypoiutil
public class EasyPoiUtils {
/**
* 导出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();
}
/**
* 根据Map创建对应的Excel(一个excel 创建多个sheet)
* @param list list 多个Map key title 对应表格Title key entity 对应表格对应实体 key data
* * Collection 数据
* @param path 路径
* @param filename 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();
}
/**
* 导入excel
* @param file
* @param pojoClass
* @param params
* @param
* @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;
}
}
3、创建实体类
创建实体类，在需要导出的字段上添加@Excel注解。
/**
* 用户实体类
*/
public class UserEntity {
@Excel(name = "ID")
private int id;
@Excel(name = "姓名")
private String name;
@Excel(name = "电子邮件",width = 20)
private String email;
@Excel(name = "年龄")
private int age;
@Excel(name = "性别",replace={"男_1", "女_2"})
private int sex;
@Excel(name = "操作时间",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 +
'}';
}
}
注解说明:
4、测试
1、测试导出单个sheet
/**
* 测试单sheet导出
* @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("[email protected]");
user.setName("张三"+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");
}
导出效果
2、测试导出多个sheet
/**
* 测试多sheet导出
* @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("用户信息"+n,"用户信息"+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("[email protected]");
user.setName("张三"+i*n);
user.setSex(i%2==0?1:2);
user.setTime(new Date());
data.add(user);
i++;
}
// 构建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");
}
导出效果:
3、测试导入excel
/**
* 测试导入
*/
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);
});
}
导入时候能够直接帮我们转化为实体类，这功能还是非常赞的。我们将结果输出到控制台，输出信息如下:
以上就是easypoi对excel表格的简单操作，当然easypoi的功能远不止这么多，easypoi的功能还是非常强大的，有兴趣的朋友可以去官方学习。
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