利用poi解析excle并导出

• 需求

  将一个excle中的数据，依据某个规则，拆分成不同的excle，并导出

• 思路

  依次解析excle，分别将符合规则的数据，放到list中，然后将list中的数据写进新建的excle

• 需要的jar包

dom4j-1.6.1.jar
poi-3.7.jar
poi-ooxml-3.7.jar
poi-ooxml-schemas-3.7.jar
xmlbeans-2.3.0.jar

• 代码实现

实体类

package poi;

public class Bank {
    private String id;
    private String name;
    private String empName;
    public String getEmpName() {
        return empName;
    }
    public void setEmpName(String empName) {
        this.empName = empName;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public Bank(String id, String name, String empName) {
        super();
        this.id = id;
        this.name = name;
        this.empName = empName;
    }
    @Override
    public String toString() {
        return "Bank [id=" + id + ", name=" + name + ", empName=" + empName + ", getEmpName()=" + getEmpName()
                + ", getName()=" + getName() + ", getId()=" + getId() + ", getClass()=" + getClass() + ", hashCode()="
                + hashCode() + ", toString()=" + super.toString() + "]";
    }

}

代码

package poi;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

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 org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;

public class AnalyzeExcle {

    public static void main(String[] args) throws Exception {
        //得到原始文件
        File file = new File("E:\\study\\code\\self\\eclipse\\demo\\src\\demo.xlsx");
        Workbook workbook = null;//相当于一个excle文件
        Sheet sheet1 = null;
        //以此种方式新建workbook可以兼容excle2003和excle20007及以后的，用后缀名方式判断经测试，不行
        workbook = WorkbookFactory.create(new FileInputStream(file));
        sheet1 = workbook.getSheetAt(0);//excle中的sheet

        List<Bank> list1234 = new ArrayList<>();
        List<Bank> list1235 = new ArrayList<>();
        List<Bank> list1236 = new ArrayList<>();
        List<Bank> list1237 = new ArrayList<>();

        for (Row row : sheet1) {//遍历sheet
            row.getCell(0).setCellType(Cell.CELL_TYPE_STRING);//第一列全是数字，如果直接读取，会报错，需先设置类型
            String id = row.getCell(0).getStringCellValue();//读取第一个单元格的值的值
            String name = row.getCell(1).getStringCellValue();
            String empName = row.getCell(2).getStringCellValue();
            Bank bank = new Bank(id, name, empName);
            if (id.equals("1234")) {
                list1234.add(bank);//放到list中
            } else if (id.equals("1235")) {
                list1235.add(bank);
            } else if (id.equals("1236")) {
                list1236.add(bank);
            } else if (id.equals("1237")) {
                list1237.add(bank);
            }

        }
        write2Excle(list1234,"1234");
        write2Excle(list1235,"1235");
        write2Excle(list1236,"1236");
        write2Excle(list1237,"1237");
    }

    public static void write2Excle(List<Bank> list, String orgnCode) throws Exception {
        HSSFWorkbook workbook = new HSSFWorkbook();//新建excle
        HSSFSheet sheet = workbook.createSheet();//新建一个sheet
        HSSFRow row = sheet.createRow(0);//第一行
        row.createCell(0).setCellValue("支行号");//设置第一行第一列的值
        row.createCell(1).setCellValue("网点名称");
        row.createCell(2).setCellValue("员工姓名");

        for (Bank bank : list) {//遍历list
            //依次建立一行
            HSSFRow r = sheet.createRow(sheet.getLastRowNum()+1);
            r.createCell(0).setCellValue(bank.getId());
            r.createCell(1).setCellValue(bank.getName());
            r.createCell(2).setCellValue(bank.getEmpName());
        }

        //得到输出流
        OutputStream out = new FileOutputStream("e:\\" + orgnCode + ".xlsx");
        //写出数据
        workbook.write(out);
    }


}