Java读取excel文件

1.poi方式读取解析

excel文件:

package com.mi.util;

import java.io.FileInputStream;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;

import com.mi.entity.Student;

public class POIReadExcelTool {

    public static void main(String[] args) throws Exception {
        List<Student> list = readXls();
        for(Student stu : list){
            System.out.println(stu.getId());
            System.out.println(stu.getName());
            System.out.println(stu.getAge());
            System.out.println(stu.getBirth());
        }
    }

    public static List<Student> readXls() throws Exception {
        InputStream is = new FileInputStream("D:/student.xls");

        HSSFWorkbook excel = new HSSFWorkbook(is);
        Student stu = null;
        List<Student> list = new ArrayList<Student>();
        
        // 循环工作表Sheet
        for (int numSheet = 0; numSheet < excel.getNumberOfSheets(); numSheet++) {
            HSSFSheet sheet = excel.getSheetAt(numSheet);
            if (sheet == null)
                continue;
            // 循环行Row
            for (int rowNum = 1; rowNum < sheet.getLastRowNum(); rowNum++) {
                HSSFRow row = sheet.getRow(rowNum);
                if (row == null)
                    continue;
                stu = new Student();
                // 循环列Cell
                // 0学号 1姓名 2年龄 3生日
                /*System.out.println((int)cell0.getNumericCellValue());
                System.out.println(cell1.getStringCellValue());
                System.out.println((int)cell2.getNumericCellValue());
                System.out.println(cell3.getStringCellValue());*/
                /**console:
                 *         1
                        张三
                        16
                        1997-03-12
                        2
                        李四
                        17
                        1996-08-12
                 */
                HSSFCell cell0 = row.getCell(0);
                if (cell0 == null)
                    continue;
                stu.setId((int)cell0.getNumericCellValue());
                HSSFCell cell1 = row.getCell(1);
                if (cell1 == null)
                    continue;
                stu.setName(cell1.getStringCellValue());
                HSSFCell cell2 = row.getCell(2);
                if (cell2 == null)
                    continue;
                stu.setAge((int)cell2.getNumericCellValue());
                HSSFCell cell3 = row.getCell(3);
                if (cell3 == null)
                    continue;
                stu.setBirth(new SimpleDateFormat("yyyy-mm-dd").parse(cell3.getStringCellValue()));
                list.add(stu);
            }
        }

        return list;
    }

    @SuppressWarnings("unused")
    private static String getValue(HSSFCell cell) {
        if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
            // 返回布尔类型 值
            return String.valueOf(cell.getBooleanCellValue());
        } else if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
            //返回数值类型的值
            return String.valueOf(cell.getNumericCellValue());
        } else {
            //返回字符串类型的值
            return cell.getStringCellValue();
        }
    }
}

结果:

1
张三
16
Sun Jan 12 00:03:00 CST 1997
2
李四
17
Fri Jan 12 00:08:00 CST 1996