Comparte una clase de herramientas de Excel, muy fácil de usar

Uno, la pieza de código

Comparta una clase de herramientas de Excel, no diga tonterías, solo vaya al código:

package com.standard.commonutil.util;

import com.google.common.collect.Lists;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.*;
import java.util.List;

/**
 * Excel工具类
 *
 * @author weiyuan
 * @version 1.0
 * @date 2016/6/19
 */
public class ExcelUtil {
    
    
    /**
     * 读取excel， 以List<List<String>>数据结构返回
     *
     * @param filepath
     * @return
     */
    public static List<List<String>> readExcel(String filepath) {
    
    
        return readExcel(new File(filepath));
    }

    /**
     * 读取excel，以List<List<String>>数据结构返回
     *
     * @param file
     * @return
     */
    public static List<List<String>> readExcel(File file) {
    
    
        return analyData(getWorkbook(file));
    }

    /**
     * 读取数据
     *
     * @param wb
     * @return
     */
    private static List<List<String>> analyData(Workbook wb) {
    
    
        Sheet sheet = null;
        Row row = null;
        List<List<String>> sheetList = Lists.newArrayList();
        String cellData = null;
        if (wb != null) {
    
    
            sheet = wb.getSheetAt(0);//获取第一个sheet
            int rownum = sheet.getPhysicalNumberOfRows();//获取最大行数
            row = sheet.getRow(0);//获取第一行
            int colnum = row.getPhysicalNumberOfCells();//获取最大列数
            for (int i = 0; i < rownum; i++) {
    
    
                List<String> rowlist = Lists.newArrayList();
                row = sheet.getRow(i);
                for (int j = 0; j < colnum; j++) {
    
    
                    cellData = (String) getCellFormatValue(row.getCell(j));
                    rowlist.add(cellData);
                }
                sheetList.add(rowlist);
            }
        }
        return sheetList;
    }

    /**
     * 读取excel
     *
     * @param file
     * @return
     */
    private static Workbook getWorkbook(File file) {
    
    
        Workbook wb = null;
        String filename = file.getName();
        String extString = filename.substring(filename.lastIndexOf("."));
        InputStream is = null;
        try {
    
    
            is = new FileInputStream(file);
            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;
    }

    /**
     * 获取单元格数据
     *
     * @param cell
     * @return
     */
    private static Object getCellFormatValue(Cell cell) {
    
    
        Object cellValue = null;
        if (cell != null) {
    
    
            switch (cell.getCellType()) {
    
    //判断cell类型
                case Cell.CELL_TYPE_NUMERIC: {
    
    
                    cellValue = String.valueOf(cell.getNumericCellValue());
                    break;
                }
                case Cell.CELL_TYPE_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 Cell.CELL_TYPE_STRING: {
    
    
                    cellValue = cell.getRichStringCellValue().getString();
                    break;
                }
                default:
                    cellValue = "";
            }
        } else {
    
    
            cellValue = "";
        }
        return cellValue;
    }
}

Segundo, dependencia de maven

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>3.9</version>
</dependency>
<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>3.12</version>
</dependency>
<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>20.0</version>
</dependency>

Tres, finalmente

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