项目结构:
用到的Excel文件:
XlsMain .java 类
//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</br>
- *
- * 参考地址:http://hao0610.iteye.com/blog/1160678
- *
- */
- public class XlsMain {
- public static void main(String[] args) throws IOException {
- XlsMain xlsMain = new XlsMain();
- XlsDto xls = null;
- List<XlsDto> list = xlsMain.readXls();
- try {
- XlsDto2Excel.xlsDto2Excel(list);
- } catch (Exception e) {
- e.printStackTrace();
- }
- for (int i = 0; i < list.size(); i++) {
- xls = (XlsDto) list.get(i);
- System.out.println(xls.getXh() + " " + xls.getXm() + " "
- + xls.getYxsmc() + " " + xls.getKcm() + " "
- + xls.getCj());
- }
- }
- /**
- * 读取xls文件内容
- *
- * @return List<XlsDto>对象
- * @throws IOException
- * 输入/输出(i/o)异常
- */
- private List<XlsDto> readXls() throws IOException {
- InputStream is = new FileInputStream("pldrxkxxmb.xls");
- HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
- XlsDto xlsDto = null;
- List<XlsDto> list = new ArrayList<XlsDto>();
- // 循环工作表Sheet
- for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++) {
- HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
- if (hssfSheet == null) {
- continue;
- }
- // 循环行Row
- for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum++) {
- HSSFRow hssfRow = hssfSheet.getRow(rowNum);
- if (hssfRow == null) {
- continue;
- }
- xlsDto = new XlsDto();
- // 循环列Cell
- // 0学号 1姓名 2学院 3课程名 4 成绩
- // for (int cellNum = 0; cellNum <=4; cellNum++) {
- HSSFCell xh = hssfRow.getCell(0);
- if (xh == null) {
- continue;
- }
- xlsDto.setXh(getValue(xh));
- HSSFCell xm = hssfRow.getCell(1);
- if (xm == null) {
- continue;
- }
- xlsDto.setXm(getValue(xm));
- HSSFCell yxsmc = hssfRow.getCell(2);
- if (yxsmc == null) {
- continue;
- }
- xlsDto.setYxsmc(getValue(yxsmc));
- HSSFCell kcm = hssfRow.getCell(3);
- if (kcm == null) {
- continue;
- }
- xlsDto.setKcm(getValue(kcm));
- HSSFCell cj = hssfRow.getCell(4);
- if (cj == null) {
- continue;
- }
- xlsDto.setCj(Float.parseFloat(getValue(cj)));
- list.add(xlsDto);
- }
- }
- return list;
- }
- /**
- * 得到Excel表中的值
- *
- * @param hssfCell
- * Excel中的每一个格子
- * @return Excel中每一个格子中的值
- */
- @SuppressWarnings("static-access")
- private String getValue(HSSFCell hssfCell) {
- if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
- // 返回布尔类型的值
- return String.valueOf(hssfCell.getBooleanCellValue());
- } else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
- // 返回数值类型的值
- return String.valueOf(hssfCell.getNumericCellValue());
- } else {
- // 返回字符串类型的值
- return String.valueOf(hssfCell.getStringCellValue());
- }
- }
- }
XlsDto2Excel.java类
//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<XlsDto> 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 < CountColumnNum; j++) {
- firstcell[j] = firstrow.createCell(j);
- firstcell[j].setCellValue(new HSSFRichTextString(names[j]));
- }
- for (int i = 0; i < xls.size(); i++) {
- // 创建一行
- HSSFRow row = sheet.createRow(i + 1);
- // 得到要插入的每一条记录
- xlsDto = xls.get(i);
- for (int colu = 0; colu <= 4; colu++) {
- // 在一行内循环
- HSSFCell xh = row.createCell(0);
- xh.setCellValue(xlsDto.getXh());
- HSSFCell xm = row.createCell(1);
- xm.setCellValue(xlsDto.getXm());
- HSSFCell yxsmc = row.createCell(2);
- yxsmc.setCellValue(xlsDto.getYxsmc());
- HSSFCell kcm = row.createCell(3);
- kcm.setCellValue(xlsDto.getKcm());
- HSSFCell cj = row.createCell(4);
- cj.setCellValue(xlsDto.getCj());
- (xlsDto.getMessage());
- }
- }
- // 创建文件输出流,准备输出电子表格
- OutputStream out = new FileOutputStream("POI2Excel/pldrxkxxmb.xls");
- hwb.write(out);
- out.close();
- System.out.println("数据库导出成功");
- }
- }
XlsDto .java类
//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;
- }
- }
后台输出:
数据库导出成功
1.0 hongten 信息技术学院 计算机网络应用基础 80.0
2.0 王五 信息技术学院 计算机网络应用基础 81.0
3.0 李胜基 信息技术学院 计算机网络应用基础 82.0
4.0 五班古 信息技术学院 计算机网络应用基础 83.0
5.0 蔡诗芸 信息技术学院 计算机网络应用基础 84.0