// **************************** ************** front-end code ********************************** **************************
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// **************************** ************** background code ********************************** **************************
Recently doing a web project, you need to write import an Excel file, as the ape is a newly recruited not on the sprouting of new, so finding some articles study a little, but talking about are a bit confusing, so in the side borrow one side of exploration to complete the import, first say a few ideas: 1. first is to convert the document to be imported into a stream. 2. Analyzing excel file or .xls .xlsx type format, format conversion into a format corresponding to the Workbook corresponding to a substantially excl file here has been introduced, and stored as a corresponding format excl . 3. This method workbook.getSheetAt () can get all of your sheet on this file, I have only one default sheet so I'll take that sheet (0). 4. The obtained sheet was then traverse this all Row, add each row of data and returns the list. 5. Then through each row, and get the information on the corresponding element, it should be noted here that this row.getCell (0) method is zero-based, and then get the data you need to reciprocal, leaving thing is the business of processing it. I look down on my specific practices.
一.环境和所需要引入的jar包。
环境：
ssm+maven
具体的文件的上传可以查看我的上一篇博客
基于springMVC的文件上传和下载
这里需要注意的是这里我们需要引入支持解析excl的工具类poi，我是直接maven直接导入的，如下：
<!-- 导入和导出excel时需要的jar包 -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml-schemas</artifactId>
<version>3.17</version>
</dependency>
<dependency>
<groupId>org.apache.xmlbeans</groupId>
<artifactId>xmlbeans</artifactId>
<version>2.6.0</version>
</dependency>到此，前期的环境的准备工作就已经全部完成了。
二.代码
## 导入的方法的接口 ##
这里需要注意下，这里的Result的是我自己定义的一个类，你们在引用的时候自己重写下就可以了，用Object就可以，返回个map就可以了。
import com.yonyouFintech.yangfan.commons.Result;
import com.yonyouFintech.yangfan.commons.util.DateUtil;
import com.yonyouFintech.yangfan.commons.util.ExcelUtil;
import com.yonyouFintech.yangfan.domain.YfBibliographic;
import com.yonyouFintech.yangfan.service.YfBibliographicService;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
@RestController
public class yfImportExclController {
@Autowired
private YfBibliographicService yfBibliographicService;
@RequestMapping(value = "/exclImport",method = RequestMethod.POST)
public Result importExcl(@RequestParam("file") MultipartFile excl, HttpServletRequest request){
Result result = new Result();
if(!excl.isEmpty()){//说明文件不为空
try {
String fileName = excl.getOriginalFilename();
InputStream is = excl.getInputStream();//转化为流的形式
List<YfBibliographic> listMer = new ArrayList<YfBibliographic>();
List<Row> list = ExcelUtil.getExcelRead(fileName,is, true);
//首先是读取行 也就是一行一行读，然后在取到列，遍历行里面的行，根据行得到列的值
for (Row row : list) {
/****************得到每个元素的值start**********************/
Cell cell_0 = row.getCell(0);
Cell cell_1 = row.getCell(1);
Cell cell_2 = row.getCell(2);
Cell cell_3 = row.getCell(3);
/*****************得到每个元素的值end**********************/
/******************解析每个元素的值start*******************/
//得到列的值，也就是你需要解析的字段的值
String bookName = ExcelUtil.getValue(cell_0);
String editor = ExcelUtil.getValue(cell_1);
String express = ExcelUtil.getValue(cell_2);
String version = ExcelUtil.getValue(cell_3);
/******************解析每个元素的值end*******************/
/****************将读取出来的数值进行包装start***********/
YfBibliographic yfBibliographic = new YfBibliographic();
yfBibliographic.setName(bookName);
yfBibliographic.setAuthor(editor);
yfBibliographic.setPress(express);
yfBibliographic.setEdition(version);
yfBibliographic.setStatus("1");
yfBibliographic.setExtend1(DateUtil.getCurDateStr());
listMer.add(yfBibliographic);
/**************将读取出来的数值进行包装end**************/
}
if(listMer.size()>0){
for (YfBibliographic item:listMer) {
yfBibliographicService.insertYfBibliographic(item);
}
}
result.setSuccess(true);
result.setSuccessMessage("导入成功！");
}catch (Exception e){
e.printStackTrace();
result.setSuccess(false);
result.setErrorMessage("导入出现异常！");
}
}else{
result.setSuccess(false);
result.setErrorMessage("导入的文件为空！");
}
return result;
}
}判断文件类型的工具类
/**
* @author zhaokk
* @Date 2017-12-01
* 工具类验证Excel文档
*/
public class WDWUtil {
/**
* @描述：是否是2003的excel，返回true是2003
* @param filePath
* @return
*/
public static boolean isExcel2003(String filePath) {
return filePath.matches("^.+\\.(?i)(xls)$");
}
/**
* @描述：是否是2007的excel，返回true是2007
* @param filePath
* @return
*/
public static boolean isExcel2007(String filePath) {
return filePath.matches("^.+\\.(?i)(xlsx)$");
}
/**
* 验证是否是EXCEL文件
* @param filePath
* @return
*/
public static boolean validateExcel(String filePath){
if (filePath == null || !(isExcel2003(filePath) || isExcel2007(filePath))){
return false;
}
return true;
}
}获取excel表格，每行的数据的类
import org.apache.poi.hssf.usermodel.HSSFCell;
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;
import java.io.InputStream;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
public class ExcelUtil {
//读取文件的方法
/**
* 获取解析文件行数据
* @param fileName : 文件地址
* @param isTitle : 是否过滤第一行解析
* @return
* @throws Exception
*/
public static List<Row> getExcelRead(String fileName, InputStream is, boolean isTitle) throws Exception{
try {
//判断其兼容版本 调用了判断版本的方法
Workbook workbook = getWorkbook(fileName,is);
Sheet sheet = workbook.getSheetAt(0);
int count = 0;
List<Row> list = new ArrayList<Row>();
for (Row row : sheet) {
// 跳过第一行的目录
if (count == 0 && isTitle) {
count++;
continue;
}
list.add(row);
}
return list;
} catch (Exception e) {
throw e;
}
}
//判断版本的方法
public static Workbook getWorkbook(String fileName,InputStream is) throws Exception{
Workbook workbook = null;
try {
/** 判断文件的类型，是2003还是2007 */
boolean isExcel2003 = true;
if (WDWUtil.isExcel2007(fileName)) {
isExcel2003 = false;
}
if (isExcel2003) {
workbook = new HSSFWorkbook(is);
} else {
workbook = new XSSFWorkbook(is);
}
} catch (Exception e) {
throw e;
}
return workbook;
}
//得到celL值的方法：
public static String getValue(Cell cell){
if(cell.getCellType() == HSSFCell.CELL_TYPE_BOOLEAN){
return String.valueOf(cell.getBooleanCellValue());
}else if(cell.getCellType() == HSSFCell.CELL_TYPE_NUMERIC){
double value = cell.getNumericCellValue();
return new BigDecimal(value).toString();
}else if (cell.getCellType() ==HSSFCell.CELL_TYPE_STRING){
return String.valueOf(cell.getStringCellValue());
}else{
return String.valueOf(cell.getStringCellValue());
}
}
}
注：前台代码转载自https://www.cnblogs.com/LoveTX/p/7081515.html
后台代码转载自https://blog.csdn.net/zhaokk_git/article/details/78693480
亲测可用。此处为防止原文丢失，特将代码保存此处。
