因为现在的工作需要把超级多的excel或者cvs文件导入数据库..
之前又没有学过,哎又没有人带，但是为了生活，实习.....
解决办法,利用poi读取excel，在使用sql语句写入数据库...(JDBCUtil可以自己写，我这里测试用mysql,公司用oracle)
不多说代码带上
package comglj.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.LinkedList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
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.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
/**
* 读取excel文件
* @author GLJ
*Poi解析2003时使用的是HSSFCell，而2007的则是
XSSFCell，是完全不同的两套API
必须先要判断excel的类型，不过 HSSFWorkbook 和 XSSFWorkbook 实现的接口都是一样的Workbook
直接在实例化接口的时候有点区别其他时候没有任何差异。
*/
public class ReadExcelUtil {
public static List<List<Object>> readExcel(File file) throws IOException {
String fileName = file.getName();
String extension = fileName.lastIndexOf(".") == -1 ? "" : fileName
.substring(fileName.lastIndexOf(".") + 1);
if ("xls".equals(extension)) {
return read2003Excel(file);
} else if ("xlsx".equals(extension)) {
return read2007Excel(file);
} else {
throw new IOException("不支持的文件类型");
}
}
/**
* 读取 office 2003 excel
* @throws IOException
* @throws FileNotFoundException
*/
private static List<List<Object>> read2003Excel(File file)
throws IOException {
List<List<Object>> list = new LinkedList<List<Object>>();
HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));
HSSFSheet sheet = hwb.getSheetAt(0);
Object value = null;
HSSFRow row = null;
HSSFCell cell = null;
int counter = 0;
//循环所有的行
for (int i = sheet.getFirstRowNum(); counter < sheet
.getPhysicalNumberOfRows(); i++) {
// if(i==0){
// //跳过第一行
// continue;
// }
row = sheet.getRow(i);
List<Object> linked = new LinkedList<Object>();
for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
cell = row.getCell(j);
if (cell == null) {
value="无";//导入不能为空
linked.add(value);
//System.out.println(value);
continue;
}
DecimalFormat df = new DecimalFormat("0");// 格式化 number String
// 字符
SimpleDateFormat sdf = new SimpleDateFormat(
"yyyy-MM-dd");// 格式化日期字符串
DecimalFormat nf = new DecimalFormat("0");// 格式化数字
switch (cell.getCellType()) {
case XSSFCell.CELL_TYPE_STRING:
value = cell.getStringCellValue();
break;
case XSSFCell.CELL_TYPE_NUMERIC:
if ("@".equals(cell.getCellStyle().getDataFormatString())) {
value = df.format(cell.getNumericCellValue());
} else if ("General".equals(cell.getCellStyle()
.getDataFormatString())) {
value = nf.format(cell.getNumericCellValue());
} else {
value = sdf.format(HSSFDateUtil.getJavaDate(cell
.getNumericCellValue()));
}
break;
case XSSFCell.CELL_TYPE_BOOLEAN:
value = cell.getBooleanCellValue();
break;
case XSSFCell.CELL_TYPE_BLANK:
value = "";
break;
default:
value = cell.toString();
}
if (value == null || "".equals(value)) {
value="null";//导入不能为空
}
linked.add(value);
}
list.add(linked);
}
return list;
}
/**
* 读取Office 2007 excel
* */
private static List<List<Object>> read2007Excel(File file)
throws IOException {
List<List<Object>> list = new LinkedList<List<Object>>();
// 构造 XSSFWorkbook 对象，strPath 传入文件路径
XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(file));
// 读取第一章表格内容
XSSFSheet sheet = xwb.getSheetAt(0);
Object value = null;
XSSFRow row = null;
XSSFCell cell = null;
int counter = 0;
//循环所有的行
for (int i = sheet.getFirstRowNum(); counter < sheet
.getPhysicalNumberOfRows(); i++) {
if(i==0){
//跳过第一行
continue;
}
row = sheet.getRow(i);
if (row == null) {
break;
}
List<Object> linked = new LinkedList<Object>();
for (int j = row.getFirstCellNum(); j <row.getLastCellNum(); j++) {
cell = row.getCell(j);
if (cell == null) {
value="";//导入不能为空
linked.add(value);
continue;
}
DecimalFormat df = new DecimalFormat("0");// 格式化 number String
// 字符
SimpleDateFormat sdf = new SimpleDateFormat(
"yyyy-MM-dd");// 格式化日期字符串
DecimalFormat nf = new DecimalFormat("0");// 格式化数字
switch (cell.getCellType()) {
case XSSFCell.CELL_TYPE_STRING:
value = cell.getStringCellValue();
break;
case XSSFCell.CELL_TYPE_NUMERIC:
if ("@".equals(cell.getCellStyle().getDataFormatString())) {
value = df.format(cell.getNumericCellValue());
} else if ("General".equals(cell.getCellStyle()
.getDataFormatString())) {
value = nf.format(cell.getNumericCellValue());
} else {
value = sdf.format(HSSFDateUtil.getJavaDate(cell
.getNumericCellValue()));
}
break;
case XSSFCell.CELL_TYPE_BOOLEAN:
value = cell.getBooleanCellValue();
break;
case XSSFCell.CELL_TYPE_BLANK://空格，空白
value = "";
break;
default:
value = cell.toString();
}
if (value == null || "".equals(value)) {
value="";//导入不能为空
}
linked.add(value);
}
list.add(linked);
}
return list;
}
public static void main(String[] args) {
try {
int count=0;
//long time1=System.currentTimeMillis();
List<List<Object>> list=readExcel(new File("F:\\k1.xlsx"));
// System.out.println("读取花费时间："+(System.currentTimeMillis()-time1)/1000.0);
for(List<Object> list2 :list){
count++;
// for(int i=0;i<list2.size();i++){
// System.out.print(list2.get(i)+"\n");
// }
if(list2.size()>4){
String id = list2.get(0).toString();
String tac = list2.get(1).toString();
String host = list2.get(2).toString();
String is_reg = list2.get(3).toString();
String host_id = list2.get(4).toString();
//System.out.println(id+"--"+tac+"--"+host+"--"+is_reg+"--"+host_id);
String sql = "insert into wdig_iot_tac_rule(ID,TAC,HOST,IS_REG,HOST_ID) values(?,?,?,?,?)";
try {
Connection conn = JDBCUtil.getConnection();
PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1, id);
ps.setString(2, tac);
ps.setString(3, host);
ps.setString(4, is_reg);
ps.setString(5, host_id);
ps.execute();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(list2.size()==4){
String id = list2.get(0).toString();
String tac = list2.get(1).toString();
String host = list2.get(2).toString();
String is_reg = list2.get(3).toString();
String host_id = null;
String sql = "insert into wdig_iot_tac_rule(ID,TAC,HOST,IS_REG,HOST_ID) values(?,?,?,?,?)";
try {
Connection conn = JDBCUtil.getConnection();
PreparedStatement ps = conn.prepareStatement(sql);
ps.setString(1, id);
ps.setString(2, tac);
ps.setString(3, host);
ps.setString(4, is_reg);
ps.setString(5, host_id);
ps.execute();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
//System.out.println("ok!");
} catch (IOException e) {
e.printStackTrace();
}
}
}
