Java (新)将Excel数据读取到ListMap

Java (新)将Excel数据读取到ListMap

Maven依赖: pom.xml

<!-- excel -->
<dependency>
  <groupId>org.apache.poi</groupId>
  <artifactId>poi-ooxml</artifactId>
  <version>3.8</version>
</dependency>

Controller访问类:

    @Controller
    @RequestMapping("/excel")
    public class ImportExcelController {

	  @RequestMapping(value = "/readto/listmap", method = { RequestMethod.GET, RequestMethod.POST})
	  @ResponseBody
	  public String readExcelToListMap(MultipartFile upfile,HttpServletRequest request, HttpServletResponse response) {
		ReturnResult result = ExcelUtil.readExcelDataToReturnResult(upfile);
		if (200 == result.getStatus()) {
			List<Map<String, Object>> listMap = (List<Map<String, Object>>) result.getData();
			if (listMap.size() > 0) {
				for (Map<String, Object> map : listMap) {
					System.out.println(map.toString());
				}
				return ReturnResult.objectToJson(ReturnResult.build(200, "导入成功 ",null));
			}else{
				return ReturnResult.objectToJson(ReturnResult.build(300, "文件内容读取为空!"));
			}
		}else{
			return ReturnResult.objectToJson(result);
		}
	}
}

Excel工具类:

    import java.io.BufferedReader;
    import java.io.ByteArrayInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.util.ArrayList;
    import java.util.Arrays;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;
    import javax.servlet.ServletOutputStream;
    import javax.servlet.http.HttpServletResponse;
    import org.apache.commons.lang3.StringUtils;
    import org.apache.poi.hssf.usermodel.HSSFWorkbook;
    import org.apache.poi.ss.usermodel.Cell;
    import org.apache.poi.ss.usermodel.DataFormatter;
    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;
    import com.test.common.pojo.ReturnResult;

    public class ExcelUtil {

        /**
         * 将Excel数据读取到ListMap
         * @param file
         * 仅支持 csv,xls,XLS,XLs,Xls,xlsx
         */
        public static ReturnResult readExcelDataToReturnResult(MultipartFile file) {
        	if (null != file) {
        		String fileName = file.getOriginalFilename();	// 获取文件名
        		if (StringUtils.isNotBlank(fileName)) {
        		if (fileName.toLowerCase().matches("^.*(csv)$")) {
        			try {
        				List<Map<String,Object>> listMap = getResource(file.getBytes());
        				return ReturnResult.build(200, "成功",listMap);
    				} catch (Exception e) {
    					e.printStackTrace();
    					return ReturnResult.build(500, "系统繁忙,请稍后再试!");
    				}
        		}else{
        			if (fileName.toLowerCase().matches("^.*(xls|XLS|XLs|Xls|xlsx)$")) {
        				String edition_2003 = "^.+\\.(?i)(xls)$";		// Excel_2003版本
        				String edition_2007 = "^.+\\.(?i)(xlsx)$";		// Excel_2007版本
        				try {
        					// 根据Excel版本创建对象
        					Workbook wb = null;
        					if (fileName.matches(edition_2003)) {
        						wb = new HSSFWorkbook(file.getInputStream());
        					} else {
        						if (fileName.matches(edition_2007)) {
        							wb = new XSSFWorkbook(file.getInputStream());
        						}
        					}
        					// 读取Excel里面的数据
        					if (null != wb) {
        						// 得到第一个shell
        						Sheet sheet = wb.getSheetAt(0);
        						// 得到Excel的行数
        						int totalRows = sheet.getPhysicalNumberOfRows();
        						// 得到Excel的列数(前提是有行数)
        						int totalCells = 0;
        						if (totalRows > 1 && sheet.getRow(0) != null) {
        							totalCells = sheet.getRow(0).getPhysicalNumberOfCells();
        						}
        						List<Map<String, Object>> listMap = new ArrayList<Map<String, Object>>();
        						// 循环Excel行数
        						for (int r = 1; r < totalRows; r++) {
        							Row row = sheet.getRow(r);
        							if (row == null) {
        								continue;
        							}
        							// 循环Excel的列
        							Map<String, Object> map = new HashMap<String, Object>();
        							for (int c = 0; c < totalCells; c++) {
        								Cell cell = row.getCell(c);
        								if (null != cell) {
        									int cellType = cell.getCellType();
        									if (cellType == 0) {
        										DataFormatter dataFormatter = new DataFormatter();
        										dataFormatter.addFormat("###########", null);
        										String str = dataFormatter.formatCellValue(cell);
        										if (StringUtils.isNotBlank(str)) {
        											map.put(c+"",str);
        										}
        									}else{
        										String str = String.valueOf(cell);
        										if (StringUtils.isNotBlank(str)) {
        											map.put(c+"",str);
        										}
        									}
        								}
        							}
        							// 添加到list
        							if (map.size() > 0) {
        								listMap.add(map);
        							}
        						}
        						return ReturnResult.build(200, "成功",listMap);
        					}else{
        						return ReturnResult.build(300, "读取文件内容为空!");
        					}
        				} catch (Exception e) {
        					e.printStackTrace();
        					return ReturnResult.build(500, "系统繁忙,请稍后再试!");
        				}
        			}else{
        				return ReturnResult.build(300, "文件格式错误,仅支持 xls,XLS,XLs,Xls,xlsx后缀的文件!");
        			}
        		}
            	}else{
    	    		return ReturnResult.build(300, "文件名不能为空!");
    	    	}
        	}else{
        		return ReturnResult.build(300, "文件不能为空!");
        	}
        }

        /** 获取csv文件内容 **/
        private static List<Map<String,Object>> getResource(byte[] bate) throws IOException {
            List<Map<String,Object>> allString = new ArrayList<>();
            // 获取文件内容
            List<String> list = getSource(bate);
            if (list.size() > 1) {
            	Map<String,Object> callLogInfo = new HashMap<>();

            	// 循环内容
            	for(int i = 1; i<list.size();i++){
            		List<String> content = Arrays.asList(list.get(i).split(","));
            		if(content!=null && content.size()>0){
            			callLogInfo = new HashMap<>();
            			for (int j = 0; j < content.size(); j++) {
            				callLogInfo.put(j+"",content.get(j));
            			}
            			allString.add(callLogInfo);
            		}
            	}
    		}
            return  allString;
        }

        /** 读文件数据 **/
        private static List<String> getSource(byte[] bate) throws  IOException {
            BufferedReader br = null;
            ByteArrayInputStream fis=null;
            InputStreamReader isr = null;
            try {
                fis = new ByteArrayInputStream(bate);
                isr = new InputStreamReader(fis,"GB2312");
                br = new BufferedReader(isr);
            } catch (Exception e) {
                e.printStackTrace();
            }
            String line;
            String everyLine ;
            List<String> allString = new ArrayList<>();
            try {
                //读取到的内容给line变量
                while ((line = br.readLine()) != null){
                    everyLine = line;
                    allString.add(everyLine.trim());
                }
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                if(fis != null){
                    fis.close();
                }
                if(isr != null){
                    isr.close();
                }
            }
            return allString;
        }    

    }