将excel表格中的数据，转换为sql语句，并存储到txt文档中。

前台页面：

<form action="${ctx}/test/result"  method="post" enctype="multipart/form-data">

<input type="file" value="选择文件" name="multipartFile" id="excel"/>
<input type="submit" class="submit" value="导出excel" />

</form>

----------

package com.capinfo.examsystem.web;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;

import java.io.*;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.logging.Logger;

/**
* Created by zhuochen on 2016/10/21.
*/
@Controller
@RequestMapping("test")
public class TestController {
private static final Logger logger = Logger.getLogger("TestController.class");
@RequestMapping("result")
public String testController(String path, MultipartFile multipartFile) throws IOException {

InputStream in = multipartFile.getInputStream();
logger.info(in+"测试样本");
/*
FileInputStream fileIn = new FileInputStream(*/
/* FileInputStream fileIn = new FileInputStream("D:\\idea_workspace1\\demosign\\target\\classes\\doc\\居住证复核20161024.xls");
InputStreamReader isr = new InputStreamReader(fileIn, "GBK");

System.out.println("==============");*/
Workbook wb = new HSSFWorkbook(new POIFSFileSystem(in));
//System.out.println(wb+":wb");
int numOfSheets = wb.getNumberOfSheets();
Sheet sheet = null;
Row row = null;
Cell cell = null;
String cellValue = "";
List<Map<String, String>> list = new ArrayList<Map<String, String>>();
Map map = null;
File savefile = new File("C:\\Users\\zhuochen\\Desktop\\doc");
if (!savefile.exists()) {
savefile.mkdirs();
}
Date date = new Date();
String simpleDateFormat = new SimpleDateFormat("yyyy年MM月dd日mm秒").format(date);
System.out.println(simpleDateFormat+"当前时间");
String s = "C:\\Users\\zhuochen\\Desktop\\doc\\小客车查询数据"+simpleDateFormat+".txt";
//System.out.println(s+"当前时间");
FileWriter fileWrite = new FileWriter(s);
// 循环遍历
// System.out.println(numOfSheets+"=====");
//for (int indexOfSheet=1; indexOfSheet < numOfSheets; indexOfSheet++) {
System.out.println("==="+savefile);
sheet = wb.getSheetAt(0);
//logger.info("数据："+sheet);
//直接从内容开始。
for (int indexOfRowNum = sheet.getFirstRowNum(), rowNum = sheet
.getLastRowNum(); indexOfRowNum <= rowNum; indexOfRowNum++) {

//System.out.println("行" + indexOfRowNum);
row = sheet.getRow(indexOfRowNum);
int lastCellNum = (int) row.getLastCellNum();
//System.out.println(lastCellNum + "？short数字");
if (row != null) {
if (row.getCell(0).toString().isEmpty()) {
continue;
} else {
map = new LinkedHashMap<String, String>();

for (int indexOfCell = 0; indexOfCell < lastCellNum; indexOfCell++) {
// System.out.println("列" + indexOfCell);
cell = row.getCell(indexOfCell);
//logger.info("每行数据："+getCellValue(cell));
if (cell != null) {
cellValue = getCellValue(cell);
if (row.getCell(0).toString().equals(cellValue)) {

int i = cellValue.lastIndexOf(".");
String cellValueNum = cellValue.substring(0, i);
fileWrite.write("select " + "\'" + cellValueNum + "\'" + " id,");
map.put(indexOfCell + "", cellValue);
} else {
//System.out.println("================" + cellValue + "cellValue");
//我只有四列需要转换  转换后形式是“select '1' id,'xxx' name,'xxxxxxxxxx' personcode,'201203070092' cardid from dual union all”
switch (indexOfCell) {
case 1:
fileWrite.write("\'" + cellValue + "\'" + " name,");
break;
case 2:
fileWrite.write("\'" + cellValue + "\'" + " personcode,");
break;
case 3:
fileWrite.write("\'" + cellValue + "\'" + " cardid from dual union all");
break;
case 4:
break;
}
map.put(indexOfCell + "", cellValue);
}
}

}
fileWrite.write("\r\n");
if (!map.isEmpty()) {
list.add(map);
}
}
}
}
//  }
//  DbUtil.insertDataItem(conn, list);
//System.out.println(list);
// 关闭流
fileWrite.flush();
fileWrite.close();
in.close();
//fileIn.close();
return "excelTest";
}
public static String getCellValue(Cell cell) {
int cellType = cell.getCellType();
String cellValue = "";
switch (cellType) {
case HSSFCell.CELL_TYPE_NUMERIC:
cellValue = String.valueOf(cell.getNumericCellValue());
break;

case HSSFCell.CELL_TYPE_FORMULA:
try {
cellValue = cell.getStringCellValue();
} catch (IllegalStateException e) {
cellValue = String.valueOf(cell.getNumericCellValue());
}
break;

default:
cellValue = cell.getStringCellValue();
}

return cellValue.trim();
}

}