java的poi技术读取和导入Excel实例

//该类有main方法，主要负责运行程序，同时该类中也包含了用poi读取Excel(2003版)
 
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
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;
 
 
/**
 * 
 * @author Hongten

 * 
 * 
 */
public class XlsMain {
 
  public static void main(String[] args) throws IOException {
    XlsMain xlsMain = new XlsMain();
    XlsDto xls = null;
    List list = xlsMain.readXls();
     
    try {
      XlsDto2Excel.xlsDto2Excel(list);
    } catch (Exception e) {
      e.printStackTrace();
    }
    for (int i = 0; i 对象
   * @throws IOException
   *       输入/输出(i/o)异常
   */
  private List readXls() throws IOException {
    InputStream is = new FileInputStream("pldrxkxxmb.xls");
    HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
    XlsDto xlsDto = null;
    List list = new ArrayList();
    // 循环工作表Sheet
    for (int numSheet = 0; numSheet 

//该类主要负责向Excel(2003版)中插入数据

import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.List;
 
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
 
 
public class XlsDto2Excel {
 
  /**
   * 
   * @param xls
   *      XlsDto实体类的一个对象
   * @throws Exception
   *       在导入Excel的过程中抛出异常
   */
  public static void xlsDto2Excel(List xls) throws Exception {
    // 获取总列数
    int CountColumnNum = xls.size();
    // 创建Excel文档
    HSSFWorkbook hwb = new HSSFWorkbook();
    XlsDto xlsDto = null;
    // sheet 对应一个工作页
    HSSFSheet sheet = hwb.createSheet("pldrxkxxmb");
    HSSFRow firstrow = sheet.createRow(0); // 下标为0的行开始
    HSSFCell[] firstcell = new HSSFCell[CountColumnNum];
    String[] names = new String[CountColumnNum];
    names[0] = "学号";
    names[1] = "姓名";
    names[2] = "学院";
    names[3] = "课程名";
    names[4] = "成绩";
    for (int j = 0; j 

//该类是一个实体类

public class XlsDto {
  /**
   * 选课号
   */
  private Integer xkh;
  /**
   * 学号
   */
  private String xh;
  /**
   * 姓名
   */
  private String xm;
  /**
   * 学院
   */
  private String yxsmc;
  /**
   * 课程号
   */
  private Integer kch;
  /**
   * 课程名
   */
  private String kcm;
  /**
   * 成绩
   */
  private float cj;
  public Integer getXkh() {
    return xkh;
  }
  public void setXkh(Integer xkh) {
    this.xkh = xkh;
  }
  public String getXh() {
    return xh;
  }
  public void setXh(String xh) {
    this.xh = xh;
  }
  public String getXm() {
    return xm;
  }
  public void setXm(String xm) {
    this.xm = xm;
  }
  public String getYxsmc() {
    return yxsmc;
  }
  public void setYxsmc(String yxsmc) {
    this.yxsmc = yxsmc;
  }
  public Integer getKch() {
    return kch;
  }
  public void setKch(Integer kch) {
    this.kch = kch;
  }
  public String getKcm() {
    return kcm;
  }
  public void setKcm(String kcm) {
    this.kcm = kcm;
  }
  public float getCj() {
    return cj;
  }
  public void setCj(float cj) {
    this.cj = cj;
  }
   
}