apache poi 解析excel

maven 依赖

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.0.0</version>
</dependency>

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>3.15</version>
</dependency>

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>3.15</version>
</dependency>

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml-schemas</artifactId>
    <version>3.15</version>
</dependency>

<dependency>
    <groupId>org.apache.xmlbeans</groupId>
    <artifactId>xmlbeans</artifactId>
    <version>2.6.0</version>
</dependency>

<dependency>
    <groupId>com.fasterxml.jackson.dataformat</groupId>
    <artifactId>jackson-dataformat-xml</artifactId>
    <version>2.0.0</version>
</dependency>

package excel;

import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Created by xiaominzh on 2016/11/14.
 */
public class ExcelExportNew {

    private static String getCellValue(XSSFCell cell,String columnType)throws Exception{
        if("i".equals(columnType)){
            return String.valueOf(cell.getNumericCellValue());
        }

        if("d".equals(columnType)){
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            return sdf.format(cell.getDateCellValue());
        }

        cell.setCellType(CellType.STRING);
        return cell.getRichStringCellValue().toString();

    }

    private static List<String> loadColumnNames(XSSFRow row){
        List<String> array = new ArrayList<String>();
        int maxCellNum = row.getLastCellNum();
        for(int i=0;i<maxCellNum;i++){
            XSSFCell cell = row.getCell(i);
            String name = cell.getStringCellValue();
            array.add(name);
        }
        return array;
    }

    private static List<String> loadColumnTypes(XSSFRow row){
        List<String> array = new ArrayList<String>();
        int maxCellNum = row.getLastCellNum();
        for(int i=0;i<maxCellNum;i++){
            XSSFCell cell = row.getCell(i);
            String name = cell.getStringCellValue();
            array.add(name);
        }
        return array;
    }

    private static void convertExcelToJSON(String fileName,String sheetName)throws Exception {
        InputStream is = ExcelExportNew.class.getResourceAsStream(fileName);
        XSSFWorkbook hssfWorkbook = new XSSFWorkbook(is);
        XSSFSheet sheet = hssfWorkbook.getSheet(sheetName);

        int rows = sheet.getLastRowNum();
        List<Map<String, Object>> result = new ArrayList<Map<String, Object>>();

        List<String> columnTypes = loadColumnTypes(sheet.getRow(0));
        List<String> columnNames = loadColumnNames(sheet.getRow(1));

        for (int i = 3; i <= rows; i++) {
            XSSFRow row = sheet.getRow(i);
            int maxCellNum = row.getLastCellNum();
            Map<String, Object> item = new HashMap<String, Object>();
            for (int cellIndex = 0; cellIndex < maxCellNum; cellIndex++) {

                XSSFCell cell = row.getCell(cellIndex);
                String columnName = columnNames.get(cellIndex);
                String columnType = columnTypes.get(cellIndex);
                String value = null;
                try {
//                    cell.setCellType(CellType.STRING);
                    value = getCellValue(cell,columnType);
                } catch (Exception e) {
                    System.err.println("row:"+i+",column:"+cellIndex);
                    System.err.println(e.getMessage());
                    break;
                }

                item.put(columnName, value);
            }
            result.add(item);
        }
        System.out.println(JSONUtil.getJSONString(result));
    }

    public static void main(String[] args) throws Exception {
        convertExcelToJSON("shop_sale_type_list.xlsx","shop_sale_type_list");
    }
}

测试excel文件

输出