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java实现excel导入数据的工具类

导入Excel数据的工具类,调用也就几行代码,很简单的。

代码如下:
import jxl.Cell;import jxl.Sheet;import jxl.Workbook;import jxl.read.biff.BiffException;import org.apache.commons.beanutils.BeanUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;

import java.io.IOException;import java.io.InputStream;import java.util.*;

/** * Excel导入的工具类. */public class ExcelUtils {    private static final Logger logger = LoggerFactory.getLogger(ExcelUtils.class);    //成功    public static final Integer STATUS_OK = Integer.valueOf(1);    //失败    public static final Integer STATUS_NO = Integer.valueOf(0);    /**     * 私有化构造器     */    private ExcelUtils(){

    }

    /**     * 获取excel文件中的数据对象     *     * @param is                        excel     * @param excelColumnNames          excel中每个字段的英文名(应该与pojo对象的字段名一致,顺序与excel一致)     * @return                          excel每行是list一条记录,map是对应的”字段名–>值”     * @throws Exception     */    public static List<Map<String, String>> getImportData(InputStream is, List<String> excelColumnNames) throws Exception {        logger.debug(“InputStream:{}”, is);        if (is == null) {            return Collections.emptyList();        }

        Workbook workbook = null;        try {            //拿到excel            workbook = Workbook.getWorkbook(is);        } catch (BiffException e) {            logger.error(e.getMessage(), e);            return Collections.EMPTY_LIST;        } catch (IOException e) {            logger.error(e.getMessage(), e);            return Collections.EMPTY_LIST;        }        logger.debug(“workbook:{}”, workbook);

        if (workbook == null) {            return Collections.emptyList();        }

        //第一个sheet        Sheet sheet = workbook.getSheet(0);        //行数        int rowCounts = sheet.getRows() – 1;        logger.debug(“rowCounts:{}”, rowCounts);        List<Map<String, String>> list = new ArrayList<Map<String, String>>(rowCounts – 1);

        //双重for循环取出数据        for(int i = 1; i < rowCounts; i++){            Map<String, String> params = new HashMap<String, String>();            //i,j i:行 j:列            for(int j = 0; j < excelColumnNames.size(); j++){                Cell cell = sheet.getCell(j, i);                params.put(excelColumnNames.get(j), cell.getContents());            }

            list.add(params);        }

        return list;    }

    /**     * 获取导入数据为对象的List     *     * @param data     * @param clazz     * @param excelColumnNames     * @param checkExcel     * @param <T>     * @return     * @throws Exception     */    public static <T> List<T> makeData(List<Map<String, String>> data, Class<T> clazz, List<String> excelColumnNames, CheckExcel checkExcel) throws Exception {        if(data == null || data.isEmpty() || clazz == null || checkExcel == null) {            return Collections.EMPTY_LIST;        }

        List<T> result = new ArrayList<T>(data.size());        for(Map<String, String> d : data) {            if(checkExcel != null && !checkExcel.check(d)) {                continue;            }            T entity = clazz.newInstance();            for(String column : excelColumnNames) {                BeanUtils.setProperty(entity, column, d.get(column));            }

            result.add(entity);        }

        return result;    }}

检查excel中每一行的数据是否合法

代码如下:
import java.util.Map;/** * 检查excel中每一行的数据是否合法 */public interface CheckExcel {    /**     * 返回true合法     *     * @param data      excel中每一行的数据     * @return     */    public boolean check(Map<String, String> data);}

调用部分

代码如下:
List<Map<String, String>> data = ExcelUtils.getImportData(is,Constants.EXCEL_COLUMN_NAMES);List<FeeAllocation> allocations = ExcelUtils.makeData(data, FeeAllocation.class, Constants.EXCEL_COLUMN_NAMES, new CheckExcel() {            public boolean check(Map<String, String> data) {                if(StringUtils.isEmpty(data.get(“name”)))                    return false;                return true;            }        });

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