如何用java实现将execl表格导入到数据库中

import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;
import java.sql.*;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import jxl.*;
public class SimUpdate {
private String fileName;
public ZfzSimUpdate(String fileName){
this.fileName = fileName;
}
static Map tNames;
static{
tNames = new HashMap();
}
/**
* 用于产生 数据库的 ID 值，组成 [年月日时分秒(100-999)] 总共 17 位数.
* 根据不同的表名，可保证同一秒内产生的 ID 号不重复
*/
private static String getDtime() {
String rid;
Date nd = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
rid = sdf.format(nd);
return rid;
}

public String getSeqNumber(String tableName) {
if(tableName == null || "".equals(tableName))
tableName = "GENERY";
Integer it;
// noinspection SynchronizeOnNonFinalField
synchronized(tNames){
it = (Integer)tNames.get(tableName);
if(it == null){
it = new Integer(100);
tNames.put(tableName, it);
}else{
if(it.intValue() > 998)
it = new Integer(100);
else
it = new Integer(1 + it.intValue());
tNames.put(tableName, it);
}
}
return getDtime() + String.valueOf(it);
}

private void updateDb(){
try{
Connection conn = DbPool.connectDB();
if(conn != null){
Statement stmt = conn.createStatement();
jxl.Workbook rwb = null;

try{
//构建Workbook对象 只读Workbook对象
//直接从本地文件创建Workbook
//从输入流创建Workbook
InputStream is = new FileInputStream(fileName);
rwb = Workbook.getWorkbook(is);
//Sheet(术语：工作表)就是Excel表格左下角的Sheet1,Sheet2,Sheet3但在程序中
//Sheet的下标是从0开始的
//获取第一张Sheet表
Sheet rs = rwb.getSheet(0);
//获取Sheet表中所包含的总列数
int rsColumns = rs.getColumns();
//获取Sheet表中所包含的总行数
int rsRows = rs.getRows();
//获取指这下单元格的对象引用

String simNumber = "",termSeqId = "";
//指定SIM卡号及序列号
for(int i=0;i for(int j=0;j Cell cell = rs.getCell(j,i);
if(j==0){
simNumber = cell.getContents();
}
termSeqId = "633"+simNumber;
}
String sql = "查询SQL";
int isOk = stmt.executeUpdate(sql);
if(isOk == 0 && !simNumber.equals("")){
String termId = getSeqNumber("termInf");
String insertSql = "自定义INSERT";
int isAdd = stmt.executeUpdate(insertSql);
if(isAdd > 0){
System.out.println("成功插入第"+i+"条数据");
}

}
//System.out.println("SIM卡号:"+simNumber+",序列号:"+termSeqId);
}

//以下代码为写入新的EXCEL,这里不使用,所以注释
/*

//利用已经创建的Excel工作薄创建新的可写入的Excel工作薄
jxl.write.WritableWorkbook wwb = Workbook.createWorkbook(new File("D://Book2.xls"),rwb);
//读取第一张工作表
jxl.write.WritableSheet ws = wwb.getSheet(0);

//获取第一个单元格对象
jxl.write.WritableCell wc = ws.getWritableCell(0, 0);
//决断单元格的类型，做出相应的转化
if (wc.getType() == CellType.LABEL) {
Label l = (Label) wc;
l.setString("The value has been modified.");
}
//写入Excel对象
wwb.write();
wwb.close();
*/
}catch(Exception e){
e.printStackTrace();
}
finally{
//操作完成时，关闭对象，翻译占用的内存空间
rwb.close();

}
}
}catch(Exception e){
e.printStackTrace();
}
}
public static void main(String args[]){
DbPool dbPool = new DbPool("dbConn.cfg");//连接数据库
SimUpdate simUpdate = new SimUpdate("zfz_sim.xls");
simUpdate.updateDb();

}

}