电脑技术学习

如何操作Excel读取数据导入DB2数据库

dn001
  最近项目需要读取Excel,将数据导入数据库保存,最终可以用报表读取数据库并显示,比较简单。查了一下两者的资料,觉的也无所谓,我需要的功能比较简单,只要能读取Excel数据就行,最后决定使用POI,比较信任apache  使用果然很简单,上网找了个源码,Copy过来稍微改改就能用了。  下面付的代码是一个Demo,功能点有两个:一就是POI读取Excel,二是DB2数据库的连接和SQL执行。  现在的问题就是这样做的话代码太死,针对一张Excel表就要编写一个专门的转换类,太麻烦了,要考虑怎么实现一个通用转换类。import java.io.FileInputStream;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
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.poifs.filesystem.POIFSFileSystem;
public class POITest {
private static Connection conn = null;
private static Statement stmt = null;
private static boolean connectDB2() {
 String url = "";
 String username = "username";
 String password = "password";
 //加载驱动程序以连接数据库
 try {
  //添加类库驱动包db2jcc.jar和db2jcc_license_cu.jar
  Class.forName("com.ibm.db2.jcc.DB2Driver");
  url = "jdbc:db2://192.168.0.1:50000/dbname";
  //添加类库驱动包db2java.jar
  //Class.forName("com.ibm.db2.jdbc.app.DB2Driver").newInstance();
  //url = "jdbc:db2:njtcdata";
  conn = DriverManager.getConnection(url, username, password);
  stmt = conn.createStatement();
 }
 //捕捉加载驱动程序异常
 catch (ClassNotFoundException cnfex) {
  System.err.println("装载JDBC驱动程序失败。");
  cnfex.printStackTrace();
  return false;
 }
 //捕捉连接数据库异常
 catch (SQLException sqlex) {
  System.err.println("无法连接数据库");
  sqlex.printStackTrace();
  //System.exit(1); // terminate program
  return false;
 }
 return true;
}
private static boolean readExcelToDB2() {
 POIFSFileSystem fs = null;
 HSSFWorkbook wb = null;
 try {
  fs = new POIFSFileSystem(new FileInputStream("c:test.xls"));
  wb = new HSSFWorkbook(fs);
 } catch (IOException e) {
  e.printStackTrace();
  return false;
 }
 HSSFSheet sheet = wb.getSheetAt(0);
 HSSFRow row = null;
 HSSFCell cell = null;
 String name = "";
 int id = 0;
 int rowNum, cellNum;
 int i;
 rowNum = sheet.getLastRowNum();
 for (i = 0; i <= rowNum; i++) {
  row = sheet.getRow(i);
  //cellNum = row.getLastCellNum();
  cell = row.getCell((short) 0);
  name = cell.getStringCellValue();
  cell = row.getCell((short) 1);
  id = (int) cell.getNumericCellValue();
  String sql = "insert into TEST(ID, NAME) values(" + id + ",'" + name + "')";
  try {
  stmt.executeUpdate(sql);
  } catch (SQLException e1) {
  e1.printStackTrace();
  return false;
  }
 }
 return true;
}
public static void main(String[] args) {
 if (connectDB2()==true){
  if (readExcelToDB2()==true)
  System.out.println("数据导入成功");
  else
  System.out.println("数据导入失败");
 }
 else{
  System.out.println("数据库连接失败");
 }
}
}