POI与EasyExcel
- 数据导出excel
- 数据导入程序
POI
- 数据加入内存再操作
- 消耗内存
// 工作簿 2003 65535行
Workbook workbook = new HSSFWorkbook();
// 工作簿 2007 无限制,但耗时较长
Workbook workbook = new XSSFWorkbook();
// 无限制,大量数据速度也快,但会产生临时文件
// 工作表
Sheet sheet = workbook.createSheet("sheet1");
// 行
Row row1 = sheet.createRow(0);
// 列 (1,1)
Cell cell1 = row1.createCell(0);
cell1.setCellValue("1,1");
Workbook workbook = new SXSSFWorkbook();
// 清除临时文件
((SXSSFWorkbook)workbook).dispose();
读取
- 注意类型问题,程序中获取时按照类型获取
<!--03-->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>4.1.0</version>
</dependency>
<!--07-->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>4.1.0</version>
</dependency>
EasyExcel
- 逐行操作
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>easyexcel</artifactId>
<version>2.2.6</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
</dependency>
代码语言:javascript复制@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {
@ExcelProperty("id")
private Integer id;
@ExcelProperty("用户名")
private String name;
//@ExcelIgnore 忽略属性
@ExcelProperty("用户密码")
private String password;
public static List<User> create(){
List<User> list = new ArrayList<User>();
User u = new User(1,"dzf", "123");
User u2 = new User(1,"dzf","123456");
User u3 = new User(2,"gyg","1234");
list.add(u);
list.add(u);
list.add(u3);
return list;
}
public static class UserListener extends AnalysisEventListener<User> {
List<User> list = new ArrayList<User>();
@Override
public void invoke(User data, AnalysisContext context) {
System.out.println(data);
}
@Override
public void doAfterAllAnalysed(AnalysisContext analysisContext) {
System.out.println("读入完成");
}
}
}
代码语言:javascript复制// 写
List<User> list = User.create();
EasyExcel.write("D:/desktop/xxx.xlsx",User.class).sheet("sheetname").doWrite(list);
代码语言:javascript复制// 读
EasyExcel.read("D:/desktop/xxx.xlsx",User.class,new User.UserListener()).sheet("sheetname").doRead();
https://alibaba-easyexcel.github.io/index.html