spring boot 中使用easyExcel 实现Excel文件读取

1.pom.xml中引入依赖

<dependency>
	<groupId>com.alibaba</groupId>
	<artifactId>easyexcel</artifactId>
	<version>2.2.0-beta2</version>
</dependency>

2.工具类：

import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.ExcelReader;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.read.metadata.ReadSheet;
import org.springframework.web.multipart.MultipartFile;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class EasyExcels {

    /**
     *
     * @param file 导入的Excel文件
     * @param tClass  对应excel实体bean
     * @return 对应excel实体bean的list
     */
    public static<T> List<Map<String ,String>> getExcelContent(MultipartFile file, Class<T> tClass){
        List<Map<String ,String>> excelPropertyIndexModelList = new ArrayList<>();
        try {
            //监听器
            AnalysisEventListener<Map<String ,String>> listener = new AnalysisEventListener<Map<String ,String>>() {
                //读取每一行的数据
                @Override
                public void invoke(Map<String ,String> excelPropertyIndexModel, AnalysisContext analysisContext) {
                    excelPropertyIndexModelList.add(excelPropertyIndexModel);
                }
                @Override
                public void doAfterAllAnalysed(AnalysisContext analysisContext) {
                    //读取之后的操作
                }
            };
            /* file.getInputStream() 输入流
             * listener 自定义的监听器
             */
            ExcelReader excelReader = EasyExcel.read(file.getInputStream(),  listener).build();
            //readSheet(0) 指定读取哪一页的数据
            ReadSheet sheet = EasyExcel.readSheet(0).build();
            excelReader.read(sheet);
            //读取所有的sheet页的数据
            //excelReader.readAll();
            //关闭，读的时候会创建临时文件，到时磁盘会崩的
            excelReader.finish();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return excelPropertyIndexModelList;
    }

}

3.业务层代码

  @ApiOperation(value = "Excel导入", notes="月份统计数据Excel导入接口")
    @PostMapping(value = "/importExcel")
    @ResponseBody
    public String updateExcel(@Param("Filedata") MultipartFile file){
        try {
            List<Map<String ,String>> excelContentList = EasyExcels.getExcelContent(file, Month.class);
            List<Month> monthList = new ArrayList<>();
            for (int i =1;i<excelContentList.size();i++){
                Month month = new Month();
                SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                Date date = format.parse(format.format(new Date()));
                Map<String ,String> list = excelContentList.get(i);
                if (list.size()>0) {
                    month.setYear(Integer.valueOf(list.get(0)));
                    month.setMonth(Integer.valueOf(list.get(1)));
                    month.setDatatype(Integer.valueOf(list.get(2)));
                    month.setAmount(Integer.valueOf(list.get(3)));
                    month.setPercent(Float.valueOf(list.get(4)));
                    month.setUpdatetime(date);
                    Long id = snowFlake.nextId();
                    month.setPk(id.intValue());
                    System.out.println(JSON.toJSON(month));
                    monthList.add(month);
                }
            }
}

4.Excel表格

5.数据库表字段

6.运行结果