@TOC
先决条件
本人导入的Excel文件为这样,具体格式可按需求改变
所涉及的数据库
商品表
g_id | name | image_url | state |
---|---|---|---|
10000 | 中信银行信用卡 | …/zhongxin.jpg | 1 |
10001 | 广发银行信用卡 | …/guangfa.jpg | 1 |
客户表
c_id | created_time | check_time | c_name | c_tel | parent_id | state | close | g_id | del |
---|---|---|---|---|---|---|---|---|---|
1201 | 2019-03-03 | 张三丰 | 13188888888 | 738 | 0 | 0 | 10001 | 0 |
员工表(省略)
代码内容 ,完整实现过程
1.Maven 配置
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2.1</version>
</dependency>
控制层 controller
/*
* 批量添加银行数据导入
*/
@ResponseBody
@RequestMapping(value = "BankDataUpload.do", produces = "application/text; charset=utf-8")
public String BankDataUpload(HttpServletRequest request, HttpServletResponse response) {
String str = null;
try {
//调用service 里BankDataUpload(request, response) 方法
str = sysUploadServiceimpl.BankDataUpload(request, response);
} catch (Exception e) {
e.printStackTrace();
}
return str;
}
实现类 里对应的BankDataUpload(request, response);方法
/*
* 导入银行回馈的数据,并修改客户的状态 client status=1
*/
@Override
public String BankDataUpload(HttpServletRequest request, HttpServletResponse response) throws Exception {
MultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext());
MultipartHttpServletRequest multipartRequest = resolver.resolveMultipart(request);
MultipartFile file = multipartRequest.getFile("upfile");
if (file.isEmpty()) {
try {
throw new Exception("文件不存在!");
} catch (Exception e) {
e.printStackTrace();
}
}
InputStream in = null;
try {
in = file.getInputStream();
} catch (IOException e) {
e.printStackTrace();
}
List<List<Object>> listob = null;
try {
listob = new ExcelUtil().getBankListByExcel(in, file.getOriginalFilename());
} catch (Exception e) {
e.printStackTrace();
}
System.out.println("将商品名字,id查出,保存在map中,避免以后重复查询");
Map<String, Integer> mapofgid = new HashMap<String, Integer>();
try {
List<Goodsmanage> list=dao.getGoodsName();
for (Goodsmanage goodsmanage : list) {
Integer gId=goodsmanage.getgId();
String name=goodsmanage.getName();
mapofgid.put(name, gId);
}
} catch (Exception e) {
e.printStackTrace();
}
String data = null;
// 该处可调用service相应方法进行数据保存到数据库中,现只对数据进行修改
for (int i = 0; i < listob.size(); i++) {
List<Object> lo = listob.get(i);
Client vo = new Client();
//获取Excel表格里的第一列数据
String createdTime = String.valueOf(lo.get(0));
createdTime = createdTime.substring(0, 10);
vo.setCreatedTime(createdTime);
String checkTime = String.valueOf(lo.get(1));
checkTime = checkTime.substring(0, 10);
vo.setCheckTime(checkTime);
String cName = (String.valueOf(lo.get(2)));
cName = cName.substring(0, cName.length() - 2);
cName = cName + '%';
vo.setcName(cName);
String cTel = (String.valueOf(lo.get(3)));
cTel = cTel.replace("****", "%");
vo.setcTel(cTel);
String gname=(String) lo.get(4);
Integer gId= mapofgid.get(gname); //与mapofgid里的key比对,获取对应的value值
vo.setgId(gId);
System.out.println(vo.toString());
try {
boolean Result = dao.UpdateBankDatas(vo);
if (!Result) {
System.out.println("___________________________修改失败____________________");
}
} catch (Exception e) {
System.out.println("修改异常");
e.printStackTrace();
}
}
data = "文件导入成功!";
return data;
}
这里参考了一篇博客 https://blog.csdn.net/Marvel__Dead/article/details/71746976 讲的是一些非常原理的内容
sql语句
<update id="UpdateBankDatas" parameterType="cn.CBHApp.entity.Client">
UPDATE client SET
check_time=#{checkTime} ,state=1 WHERE g_id=#{gId} and created_time=#{createdTime} and
c_name like #{cName} and c_tel LIKE #{cTel}
</update>
工具类 ExcelUtil
这里借鉴了一篇博客 https://blog.csdn.net/qq_37880968/article/details/83038412
import java.io.IOException;
import java.io.InputStream;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ExcelUtil {
private final static String excel2003L =".xls"; //2003- 版本的excel
private final static String excel2007U =".xlsx"; //2007+ 版本的excel
/**
* 描述:获取IO流中的数据,组装成List<List<Object>>对象
* @param in,fileName
* @return
* @throws IOException
*/
public List<List<Object>> getBankListByExcel(InputStream in,String fileName) throws Exception{
List<List<Object>> list = null;
//创建Excel工作薄
Workbook work = this.getWorkbook(in,fileName);
if(null == work){
throw new Exception("创建Excel工作薄为空!");
}
Sheet sheet = null; //页数
Row row = null; //行数
Cell cell = null; //列数
list = new ArrayList<List<Object>>();
//遍历Excel中所有的sheet
// 将最大的列数记录下来
int lastCellNum = 0;
for (int i = 0; i < work.getNumberOfSheets(); i++) {
sheet = work.getSheetAt(i);
if(sheet==null){continue;}
//遍历当前sheet中的所有行
for (int j = sheet.getFirstRowNum(); j <= sheet.getLastRowNum(); j++) {
row = sheet.getRow(j);
if(row==null||row.getFirstCellNum()==j){continue;}
//遍历所有的列
List<Object> li = new ArrayList<Object>();
// 比较当前行的列数跟表的最大的列数
if (j == sheet.getFirstRowNum()) {
// 将第一行的列数设为最大
lastCellNum = row.getLastCellNum();
}else {
lastCellNum = lastCellNum > row.getLastCellNum() ? lastCellNum : row.getLastCellNum();
}
for (int y = row.getFirstCellNum(); y < lastCellNum; y++) {
cell = row.getCell(y);
li.add(this.getValue(cell));
}
list.add(li);
}
}
return list;
}
/**
* 描述:根据文件后缀,自适应上传文件的版本
* @param inStr,fileName
* @return
* @throws Exception
*/
public Workbook getWorkbook(InputStream inStr,String fileName) throws Exception{
Workbook wb = null;
String fileType = fileName.substring(fileName.lastIndexOf("."));
if(excel2003L.equals(fileType)){
wb = new HSSFWorkbook(inStr); //2003-
}else if(excel2007U.equals(fileType)){
wb = new XSSFWorkbook(inStr); //2007+
}else{
throw new Exception("解析的文件格式有误!");
}
return wb;
}
/**
* 描述:对表格中数值进行格式化
* @param cell
* @return
*/
//解决excel类型问题,获得数值
public String getValue(Cell cell) {
String value = "";
if(null==cell){
return value;
}
switch (cell.getCellType()) {
//数值型
case Cell.CELL_TYPE_NUMERIC:
if (HSSFDateUtil.isCellDateFormatted(cell)) {
//如果是date类型则 ,获取该cell的date值
Date date = HSSFDateUtil.getJavaDate(cell.getNumericCellValue());
// 根据自己的实际情况,excel表中的时间格式是yyyy-MM-dd HH:mm:ss还是yyyy-MM-dd,或者其他类型
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
// 由于方法的返回值类型为String,这里将Date类型转为String,便于统一返回数据
value = format.format(date);;
}else {// 纯数字
BigDecimal big=new BigDecimal(cell.getNumericCellValue());
value = big.toString();
//解决1234.0 去掉后面的.0
if(null!=value&&!"".equals(value.trim())){
String[] item = value.split("[.]");
if(1<item.length&&"0".equals(item[1])){
value=item[0];
}
}
}
break;
//字符串类型
case Cell.CELL_TYPE_STRING:
value = cell.getStringCellValue().toString();
break;
// 公式类型
case Cell.CELL_TYPE_FORMULA:
//读公式计算值
value = String.valueOf(cell.getNumericCellValue());
if (value.equals("NaN")) {// 如果获取的数据值为非法值,则转换为获取字符串
value = cell.getStringCellValue().toString();
}
break;
// 布尔类型
case Cell.CELL_TYPE_BOOLEAN:
value = " "+ cell.getBooleanCellValue();
break;
default:
value = cell.getStringCellValue().toString();
}
if("null".endsWith(value.trim())){
value="";
}
return value;
}
}