@TOC
先決條件
本人導入的Excel文件爲這樣,具體格式可按需求改變
所涉及的數據庫
商品表
g_id | name | image_url | state |
---|---|---|---|
10000 | 中信銀行信用卡 | …/zhongxin.jpg | 1 |
10001 | 廣發銀行信用卡 | …/guangfa.jpg | 1 |
客戶表
c_id | created_time | check_time | c_name | c_tel | parent_id | state | close | g_id | del |
---|---|---|---|---|---|---|---|---|---|
1201 | 2019-03-03 | 張三丰 | 13188888888 | 738 | 0 | 0 | 10001 | 0 |
員工表(省略)
代碼內容 ,完整實現過程
1.Maven 配置
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.2.1</version>
</dependency>
控制層 controller
/*
* 批量添加銀行數據導入
*/
@ResponseBody
@RequestMapping(value = "BankDataUpload.do", produces = "application/text; charset=utf-8")
public String BankDataUpload(HttpServletRequest request, HttpServletResponse response) {
String str = null;
try {
//調用service 裏BankDataUpload(request, response) 方法
str = sysUploadServiceimpl.BankDataUpload(request, response);
} catch (Exception e) {
e.printStackTrace();
}
return str;
}
實現類 裏對應的BankDataUpload(request, response);方法
/*
* 導入銀行回饋的數據,並修改客戶的狀態 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("將商品名字,id查出,保存在map中,避免以後重複查詢");
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;
// 該處可調用service相應方法進行數據保存到數據庫中,現只對數據進行修改
for (int i = 0; i < listob.size(); i++) {
List<Object> lo = listob.get(i);
Client vo = new Client();
//獲取Excel表格裏的第一列數據
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); //與mapofgid裏的key比對,獲取對應的value值
vo.setgId(gId);
System.out.println(vo.toString());
try {
boolean Result = dao.UpdateBankDatas(vo);
if (!Result) {
System.out.println("___________________________修改失敗____________________");
}
} catch (Exception e) {
System.out.println("修改異常");
e.printStackTrace();
}
}
data = "文件導入成功!";
return data;
}
這裏參考了一篇博客 https://blog.csdn.net/Marvel__Dead/article/details/71746976 講的是一些非常原理的內容
sql語句
<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>
工具類 ExcelUtil
這裏借鑑了一篇博客 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:獲取IO流中的數據,組裝成List<List<Object>>對象
* @param in,fileName
* @return
* @throws IOException
*/
public List<List<Object>> getBankListByExcel(InputStream in,String fileName) throws Exception{
List<List<Object>> list = null;
//創建Excel工作薄
Workbook work = this.getWorkbook(in,fileName);
if(null == work){
throw new Exception("創建Excel工作薄爲空!");
}
Sheet sheet = null; //頁數
Row row = null; //行數
Cell cell = null; //列數
list = new ArrayList<List<Object>>();
//遍歷Excel中所有的sheet
// 將最大的列數記錄下來
int lastCellNum = 0;
for (int i = 0; i < work.getNumberOfSheets(); i++) {
sheet = work.getSheetAt(i);
if(sheet==null){continue;}
//遍歷當前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;}
//遍歷所有的列
List<Object> li = new ArrayList<Object>();
// 比較當前行的列數跟表的最大的列數
if (j == sheet.getFirstRowNum()) {
// 將第一行的列數設爲最大
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:根據文件後綴,自適應上傳文件的版本
* @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("解析的文件格式有誤!");
}
return wb;
}
/**
* 描述:對錶格中數值進行格式化
* @param cell
* @return
*/
//解決excel類型問題,獲得數值
public String getValue(Cell cell) {
String value = "";
if(null==cell){
return value;
}
switch (cell.getCellType()) {
//數值型
case Cell.CELL_TYPE_NUMERIC:
if (HSSFDateUtil.isCellDateFormatted(cell)) {
//如果是date類型則 ,獲取該cell的date值
Date date = HSSFDateUtil.getJavaDate(cell.getNumericCellValue());
// 根據自己的實際情況,excel表中的時間格式是yyyy-MM-dd HH:mm:ss還是yyyy-MM-dd,或者其他類型
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
// 由於方法的返回值類型爲String,這裏將Date類型轉爲String,便於統一返回數據
value = format.format(date);;
}else {// 純數字
BigDecimal big=new BigDecimal(cell.getNumericCellValue());
value = big.toString();
//解決1234.0 去掉後面的.0
if(null!=value&&!"".equals(value.trim())){
String[] item = value.split("[.]");
if(1<item.length&&"0".equals(item[1])){
value=item[0];
}
}
}
break;
//字符串類型
case Cell.CELL_TYPE_STRING:
value = cell.getStringCellValue().toString();
break;
// 公式類型
case Cell.CELL_TYPE_FORMULA:
//讀公式計算值
value = String.valueOf(cell.getNumericCellValue());
if (value.equals("NaN")) {// 如果獲取的數據值爲非法值,則轉換爲獲取字符串
value = cell.getStringCellValue().toString();
}
break;
// 布爾類型
case Cell.CELL_TYPE_BOOLEAN:
value = " "+ cell.getBooleanCellValue();
break;
default:
value = cell.getStringCellValue().toString();
}
if("null".endsWith(value.trim())){
value="";
}
return value;
}
}