package com.platform.utils.excel;import com.platform.utils.RRException;
import org.springframework.web.multipart.MultipartFile;import java.io.IOException;
import java.util.List;
import java.util.Map;/*** Excel文件导入的基本功能类* 可导入EXCEL2003 和 EXCEL2007格式。** @date 2017年10月28日 13:11:27*/
public class ExcelImport {/*** excel2003扩展名*/public static final String EXCEL03_EXTENSION = ".xls";/*** excel2007扩展名*/public static final String EXCEL07_EXTENSION = ".xlsx";private ExcelImport() {}/*** 解析EXCEL数据为 List<String[]>** @param excelFile 要解析的上传EXCEL文件* @return List<String[]) 行（列）*/public static List<String[]> getExcelData07(MultipartFile excelFile) {List<String[]> resultList = null;if (null == excelFile || excelFile.isEmpty()) {throw new RRException("文件内容为空！");}Excel2007Reader excel07 = new Excel2007Reader();try {excel07.process(excelFile.getInputStream(), false);} catch (Exception e) {throw new RRException("excel解析失败！");}resultList = excel07.getSheetData(0);return resultList;}/*** 解析EXCEL数据为 List<String[]>** @param excelFile 要解析的上传EXCEL文件* @return List<String[]) 行（列）*/public static List<String[]> getExcelData03(MultipartFile excelFile) {List<String[]> resultList = null;if (null == excelFile || excelFile.isEmpty()) {throw new RRException("文件内容为空！");}Excel2003Reader excel03 = new Excel2003Reader();// 实例化excel处理对象try {excel03.process(excelFile.getInputStream());} catch (IOException e) {throw new RRException("excel解析失败！");}resultList = excel03.getSheetData(0);return resultList;}/*** 通过解析MultipartFile对象获取excel内容，并且将其拼装为List<String[]>对象返回** @param excelFile* @return* @throws Exception*/public static List<String[]> getExcelData(MultipartFile excelFile)throws RRException {List<String[]> resultList = null;if (!excelFile.isEmpty()) {// 上传的文件不能为空String excelFileName = excelFile.getOriginalFilename();// 文件名（带后缀）if (excelFileName.toLowerCase().endsWith(EXCEL03_EXTENSION)) {// 如果文件是以.xls为后缀Excel2003Reader excel03 = new Excel2003Reader();// 实例化excel处理对象try {excel03.process(excelFile.getInputStream());} catch (IOException e) {throw new RRException("excel解析失败！");}resultList = excel03.getSheetData(0);} else if (excelFileName.toLowerCase().endsWith(EXCEL07_EXTENSION)) {// 如果文件是以.xlsx为后缀Excel2007Reader excel07 = new Excel2007Reader();try {excel07.process(excelFile.getInputStream(), false);} catch (Exception e) {throw new RRException("excel解析失败！");}resultList = excel07.getSheetData(0);}}return resultList;}/*** 通过解析MultipartFile对象获取excel内容，并且将其拼装为Map<Integer, List<String[]>>对象返回** @param excelFile* @return* @throws Exception*/public static Map<Integer, List<String[]>> getExcelDataAll(MultipartFile excelFile)throws RRException {Map<Integer, List<String[]>> result = null;if (!excelFile.isEmpty()) {// 上传的文件不能为空String excelFileName = excelFile.getOriginalFilename();// 文件名（带后缀）if (excelFileName.toLowerCase().endsWith(EXCEL03_EXTENSION)) {// 如果文件是以.xls为后缀Excel2003Reader excel03 = new Excel2003Reader();// 实例化excel处理对象try {excel03.process(excelFile.getInputStream());} catch (IOException e) {throw new RRException("excel解析失败！");}result = excel03.getSheetData();} else if (excelFileName.toLowerCase().endsWith(EXCEL07_EXTENSION)) {// 如果文件是以.xlsx为后缀Excel2007Reader excel07 = new Excel2007Reader();try {excel07.process(excelFile.getInputStream(), true);} catch (Exception e) {throw new RRException("excel解析失败！");}result = excel07.getSheetData();}}return result;}
}

package com.platform.utils;/*** 自定义异常** * @date 2017年11月18日 下午13:13:23*/
public class RRException extends RuntimeException {private static final long serialVersionUID = 1L;private String msg;private int code = 500;public RRException(String msg) {super(msg);this.msg = msg;}public RRException(String msg, Throwable e) {super(msg, e);this.msg = msg;}public RRException(String msg, int code) {super(msg);this.msg = msg;this.code = code;}public RRException(String msg, int code, Throwable e) {super(msg, e);this.msg = msg;this.code = code;}public String getMsg() {return msg;}public void setMsg(String msg) {this.msg = msg;}public int getCode() {return code;}public void setCode(int code) {this.code = code;}}

 for(int i = 1;i<list.size();i++){if(list.get(i-1).length!=list.get(i).length){Integer count = list.get(0).length-list.get(i).length;String[] a = new String[count];for(int j=0;j<a.length;j++){a[j]="";}List l = new ArrayList(Arrays.asList(list.get(i)));l.addAll(Arrays.asList(a));String[] arr = (String[]) l.toArray(new String[list.get(0).length]);list.set(i,arr);}