简单使用EasyExcel进行表格的读写

1.导入jar包

<dependencies>
        <!-- https://mvnrepository.com/artifact/com.alibaba/easyexcel -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>easyexcel</artifactId>
            <version>2.1.1</version>
        </dependency>
    </dependencies>

2.定义实体类

package com.atguigu.easyexcel;
​
import com.alibaba.excel.annotation.ExcelProperty;
import lombok.Data;
​
@Data
public class UserData {
​
    @ExcelProperty(value = "用户编号",index = 0)//excel文件的表头
    private int uid;
​
    @ExcelProperty(value = "用户姓名",index = 1)//excel文件的表头
    private String username;
}

3.写操作

package com.atguigu.easyexcel;
​
import com.alibaba.excel.EasyExcel;
​
import java.util.ArrayList;
import java.util.List;
​
public class TestWrite {
    public static void main(String[] args) {
​
        //定义写入文件得集合
        List<UserData> list = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            UserData userData = new UserData();
            userData.setUid(i);
            userData.setUsername("小雷同学" + i);
            list.add(userData);
       }
​
        //定义文件写入路径
        String fileName = "E:\\easyexcel\\01.xlsx";
​
        EasyExcel.write(fileName , UserData.class).sheet("用户信息").doWrite(list);
   }
}
​

 

 

4.读操作

1.首先定义一个监听器

package com.atguigu.easyexcel;
​
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
​
import java.util.Map;
​
public class ExcelListener extends AnalysisEventListener<UserData> {
​
    //一行一行读取，从第二行开始
    @Override
    public void invoke(UserData userData, AnalysisContext analysisContext) {
        System.out.println(userData);
   }
​
    @Override
    public void invokeHeadMap(Map<Integer, String> headMap, AnalysisContext context) {
        System.out.println("表头信息" + headMap);
   }
​
    //读取之后执行
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {
​
   }
}
​

2.测试读取内容

package com.atguigu.easyexcel;
​
import com.alibaba.excel.EasyExcel;
​
public class TestRead {
    public static void main(String[] args) {
        
        //设置读取路径
        String fileName = "E:\\easyexcel\\01.xlsx";
​
        EasyExcel.read(fileName,UserData.class,new ExcelListener()).sheet().doRead();
   }
}
​