解析excel

Posted 2021-01-04 dbutil

一、使用jxl解析excel。该方法不支持xlsx格式文件。只支持xls文件

1.在pom.xml中导入包

<dependency>
    <groupId>net.sourceforge.jexcelapi</groupId>
    <artifactId>jxl</artifactId>
    <version>2.6.12</version>
</dependency>

2.demo如下

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.cykj.domain.InsInfo;
import com.cykj.domain.LinkInfo;
import com.cykj.util.FileUtil;

import jxl.Sheet;
import jxl.Workbook;

public class SynFile {
    public static void main(String[] args) {
        SynFile synFile = new SynFile();
        //synFile.readFile("D:/file/test.xls", "test.xls");
    }
    public Map<String, Object> readFile(File file, String fileName) {
        
        Map<String, Object> map = new HashMap<>();
        try {
            FileInputStream fis = null;
            String fileExtName = FileUtil.getExtensionName(fileName);
            if (fileExtName.equals("xls")) {
                // 处理excel类型的文件
                BufferedInputStream bos = null;
                try {
                    // 转换文件流
                    fis = new FileInputStream(file);
                    bos = new BufferedInputStream(fis);
                    // 处理Excel文件
                    map = readAgentXLS(bos);
                } catch (Exception e) {
                    e.printStackTrace();
                    //Log.error("【扫码支付数据同步入库】代理商文件：【" + fileName + "】读取出现异常，异常信息：" + e.getMessage());
                } finally {
                    // 关闭流
                    try {
                        if (bos != null) {
                            bos.close();
                            bos = null;
                        }
                        if (fis != null) {
                            fis.close();
                            fis = null;
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                        throw e;
                    }
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            //Log.error("【扫码支付数据同步入库】读取代理商文件:【" + fileName + "】异常!!!详细:" + e.getMessage());
        }
        
        
        
        return map;
        
    }
    
    public Map<String, Object> readAgentXLS(BufferedInputStream inputStream) throws Exception {
        Map<String, Object> map = new HashMap<>();
        if (inputStream == null) {
            throw new Exception("未获取到文件");
        }
        List<LinkInfo> linkList = new ArrayList<LinkInfo>();
        List<InsInfo> insList = new ArrayList<>();
        Workbook workBook = null;
        Sheet sheet = null;
        int cols = 0;
        int rows = 0;
        workBook = Workbook.getWorkbook(inputStream);
        if (null != workBook) {
            sheet = workBook.getSheet(0);
            cols = sheet.getColumns();
            rows = sheet.getRows();
        }
        try {
            List<String> content = null;
            for (int i = 1; i < rows; i++) {
                content = new ArrayList<String>();
                // 从第一列开始循环
                for (int j = 0; j < cols; j++) {
                    content.add(sheet.getCell(j, i).getContents());// 添加每列的内容到集合中去
                }
                InsInfo insInfo = new InsInfo();
                LinkInfo linkInfo = new LinkInfo();
                
                insInfo.setInsName(content.get(0));
                insInfo.setInsType(checkInteger(content.get(1)));
                insInfo.setProvince(content.get(2));
                insInfo.setCity(content.get(3));
                insInfo.setDistrict(content.get(4));
                insInfo.setInsAddress(content.get(5));
                insInfo.setRecommendMan(content.get(6));
                insInfo.setRemark(content.get(7));
                insInfo.setInsPhone(content.get(8));
                
                linkInfo.setLinkName(content.get(9));
                linkInfo.setLinkGender(checkInteger(content.get(10)));
                linkInfo.setLinkPosition(content.get(11));
                linkInfo.setLinkMobile(content.get(12));
                
                
                insList.add(insInfo);
                linkList.add(linkInfo);
                
            }
            map.put("ins", insList);
            map.put("link", linkList);
            return map;
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        } finally {
            if (null != workBook) {
                workBook.close();
            }
            if (inputStream != null) {
                inputStream.close();
            }
            workBook = null;
            inputStream = null;
        }
    }
    
    public Integer checkInteger(String str) throws Exception {
        if (str == null || str == "") {
            return 0;
        } else {
            return Integer.parseInt(str);
        }
    }

}

说明：在代码中解析excel，每一列都包括了insInfo和linkInfo两个实体类。将每一列的实体类封装到list中返回map。

二、使用poi解析excel,支持xls和xlsx两种格式。推举使用

1.准备jar包

        <dependency>  
            <groupId>org.apache.poi</groupId>  
            <artifactId>poi-ooxml</artifactId>  
            <version>3.14</version>  
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.5</version>
        </dependency>

2.准备demo

import org.apache.log4j.Logger;  
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 org.springframework.web.multipart.MultipartFile;  
/** 
 * excel读写工具类 */  
public class PoiExcel {  
    private static Logger logger  = Logger.getLogger(PoiExcel.class);  
    private final static String xls = "xls";  
    private final static String xlsx = "xlsx";  
      
    /** 
     * 读入excel文件，解析后返回 
     * @param file 
     * @throws IOException  
     */  
    public static List<String[]> readExcel(MultipartFile file) throws IOException{  
        //检查文件  
        checkFile(file);  
        //获得Workbook工作薄对象  
        Workbook workbook = getWorkBook(file);  
        //创建返回对象，把每行中的值作为一个数组，所有行作为一个集合返回  
        List<String[]> list = new ArrayList<String[]>();  
        if(workbook != null){  
            for(int sheetNum = 0;sheetNum < workbook.getNumberOfSheets();sheetNum++){  
                //获得当前sheet工作表  
                Sheet sheet = workbook.getSheetAt(sheetNum);  
                if(sheet == null){  
                    continue;  
                }  
                //获得当前sheet的开始行  
                int firstRowNum  = sheet.getFirstRowNum();  
                //获得当前sheet的结束行  
                int lastRowNum = sheet.getLastRowNum();  
                //循环除了第一行的所有行  
                for(int rowNum = firstRowNum+1;rowNum <= lastRowNum;rowNum++){  
                    //获得当前行  
                    Row row = sheet.getRow(rowNum);  
                    if(row == null){  
                        continue;  
                    }  
                    //获得当前行的开始列  
                    int firstCellNum = row.getFirstCellNum();  
                    //获得当前行的列数  
                    int lastCellNum = row.getPhysicalNumberOfCells();  
                    String[] cells = new String[row.getPhysicalNumberOfCells()];  
                    //循环当前行  
                    for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){  
                        Cell cell = row.getCell(cellNum);  
                        cells[cellNum] = getCellValue(cell);  
                    }  
                    list.add(cells);  
                }  
            }  
            workbook.close();  
        }  
        return list;  
    }  
    public static void checkFile(MultipartFile file) throws IOException{  
        //判断文件是否存在  
        if(null == file){  
            logger.error("文件不存在！");  
            throw new FileNotFoundException("文件不存在！");  
        }  
        //获得文件名  
        String fileName = file.getOriginalFilename();  
        //判断文件是否是excel文件  
        if(!fileName.endsWith(xls) && !fileName.endsWith(xlsx)){  
            logger.error(fileName + "不是excel文件");  
            throw new IOException(fileName + "不是excel文件");  
        }  
    }  
    public static Workbook getWorkBook(MultipartFile file) {  
        //获得文件名  
        String fileName = file.getOriginalFilename();  
        //创建Workbook工作薄对象，表示整个excel  
        Workbook workbook = null;  
        try {  
            //获取excel文件的io流  
            InputStream is = file.getInputStream();  
            //根据文件后缀名不同(xls和xlsx)获得不同的Workbook实现类对象  
            if(fileName.endsWith(xls)){  
                //2003  
                workbook = new HSSFWorkbook(is);  
            }else if(fileName.endsWith(xlsx)){  
                //2007  
                workbook = new XSSFWorkbook(is);  
            }  
        } catch (IOException e) {  
            logger.info(e.getMessage());  
        }  
        return workbook;  
    }  
    public static String getCellValue(Cell cell){  
        String cellValue = "";  
        if(cell == null){  
            return cellValue;  
        }  
        //把数字当成String来读，避免出现1读成1.0的情况  
        if(cell.getCellType() == Cell.CELL_TYPE_NUMERIC){  
            cell.setCellType(Cell.CELL_TYPE_STRING);  
        }  
        //判断数据的类型  
        switch (cell.getCellType()){  
            case Cell.CELL_TYPE_NUMERIC: //数字  
                cellValue = String.valueOf(cell.getNumericCellValue());  
                break;  
            case Cell.CELL_TYPE_STRING: //字符串  
                cellValue = String.valueOf(cell.getStringCellValue());  
                break;  
            case Cell.CELL_TYPE_BOOLEAN: //Boolean  
                cellValue = String.valueOf(cell.getBooleanCellValue());  
                break;  
            case Cell.CELL_TYPE_FORMULA: //公式  
                cellValue = String.valueOf(cell.getCellFormula());  
                break;  
            case Cell.CELL_TYPE_BLANK: //空值   
                cellValue = "";  
                break;  
            case Cell.CELL_TYPE_ERROR: //故障  
                cellValue = "非法字符";  
                break;  
            default:  
                cellValue = "未知类型";  
                break;  
        }  
        return cellValue;  
    }  
}

说明：解析excel后返回一个list，list中封装了String数组，每个String数组就是excel的一列数据。

 

ps:亲测可用