Java实现读取Excel指定列的指定行的数据

待我称王封你为后i 2022-05-09 19:54 655阅读 0赞

package utils;
    
    import java.io.FileInputStream;
    import java.io.FileNotFoundException;
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.*;
    import java.util.Map.Entry;
    
    import org.apache.poi.hssf.usermodel.HSSFWorkbook;
    import org.apache.poi.ss.usermodel.*;
    import org.apache.poi.xssf.usermodel.XSSFWorkbook;
    /**
     * by zfy
     * 2018/9/20
     */
    public class ExcelUtil {
    
        /**
         *
         * @param filePath  需要读取的文件路径
         * @param column  指定需要获取的列数，例如第一列 1
         * @param startRow 指定从第几行开始读取数据
         * @param  endRow 指定结束行
         * @return 返回读取列数据的set
         */
        public static HashSet<String> getColumnSet(String filePath, int column, int startRow , int endRow){
            Workbook wb = readExcel(filePath); //文件
            Sheet sheet = wb.getSheetAt(0); //sheet
            int rownum = sheet.getPhysicalNumberOfRows(); //行数
            Row row = null;
            HashSet<String> result = new HashSet<>();
            String cellData = null;
            if(wb != null){
                for (int i=startRow-1; i<endRow; i++){
                    System.out.println(i);
                    row = sheet.getRow(i);
                    if(row !=null){
                            cellData = (String) getCellFormatValue(row.getCell(column-1));
                            result.add(cellData.replaceAll(" ", ""));
                    }else{
                        break;
                    }
                    System.out.println(cellData);
                }
            }
            return  result;
        }
    
        /**
         *
         * @param filePath 需要读取的文件路径
         * @param column 指定需要获取的列数，例如第一列 1
         * @param startRow 指定从第几行开始读取数据
         * @return  返回读取列数据的set
         */
        public static HashSet<String> getColumnSet(String filePath, int column, int startRow){
            Workbook wb = readExcel(filePath); //文件
            Sheet sheet = wb.getSheetAt(0); //sheet
            int rownum = sheet.getPhysicalNumberOfRows(); //行数
            System.out.println("sumrows " + rownum);
    
            return  getColumnSet(filePath, column, startRow , rownum-1);
        }
    
    
    
        //读取excel
        public static Workbook readExcel(String filePath){
            Workbook wb = null;
            if(filePath==null){
                return null;
            }
            String extString = filePath.substring(filePath.lastIndexOf("."));
            InputStream is = null;
            try {
                is = new FileInputStream(filePath);
                if(".xls".equals(extString)){
                    return wb = new HSSFWorkbook(is);
                }else if(".xlsx".equals(extString)){
                    return wb = new XSSFWorkbook(is);
                }else{
                    return wb = null;
                }
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return wb;
        }
    
        public static Object getCellFormatValue(Cell cell){
            Object cellValue = null;
            if(cell!=null){
                //判断cell类型
                switch(cell.getCellType()){
                    case NUMERIC:{
                        cell.setCellType(CellType.STRING);  //将数值型cell设置为string型
                        cellValue = cell.getStringCellValue();
                        break;
                    }
                    case FORMULA:{
                        //判断cell是否为日期格式
                        if(DateUtil.isCellDateFormatted(cell)){
                         //转换为日期格式YYYY-mm-dd
                            cellValue = cell.getDateCellValue();
                        }else{
                                //数字
                            cellValue = String.valueOf(cell.getNumericCellValue());
                        }
                        break;
                    }
                    case STRING:{
                         cellValue = cell.getRichStringCellValue().getString();
                         break;
                    }
                    default:
                        cellValue = "";
                }
            }else{
                cellValue = "";
            }
            return cellValue;
        }
    
    }

使用：

@org.testng.annotations.Test
    public void testReadExcel(){
        HashSet<String> columnSet = ExcelUtil.getColumnSet("src/main/resources/pboc/Excelfile_V2.xlsx", 1, 90);  //读取第一列的从第90行开始往后的数据 到set
        System.out.println(columnSet.size());
        System.out.println(columnSet.toString());
    
    HashSet<String> excelParamsSet = ExcelUtil.getColumnSet(CommonConstant.excelJingDongXinYongPath, 8, 2, 26); //读取第8列的第二行到第26行 数据 到set
    }

引用包

<dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi</artifactId>
        <version>4.0.0</version>
    </dependency>
    
    
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi-ooxml</artifactId>
        <version>4.0.0</version>
    </dependency>