jxls导入Excel的问题

Posted 2023-03-19

导入的excel有一单元格值为空，该值对应的类属性类型为Date，解析excel的时候总报错，因为需要把一个null值转化成Date，这种问题怎么解决

参考技术A 不知道时间是来及，但还是写个可能性解决方案吧，在<mapping>标签中加入属性nullAllowed="true"就可以了 参考技术B Workbook workbook = Workbook.getWorkbook(new File(filePath));
Sheet sheet = workbook.getSheet(0);
int col = sheet.getColumns();
int row = sheet.getRows();
String result[][] = new String[row][col];
Cell cell;
// i列 j行
System.out.println("col:"+col+" row: "+row);

for (int i = 0; i < row; i++)
if(i!=0)
SubjectEntity sub=new SubjectEntity();
for (int j = 0; j < col; j++)
cell = sheet.getCell(j, i);
result[i][j] = cell.getContents();
if(j==0)
sub.setQuestion(result[i][j]);

jxls实现导入Excel数据

SSM项目导入Excel,话不多说,直接干货

1:添加maven相关依赖　

<dependency>
                <groupId>org.jxls</groupId>
                <artifactId>jxls-reader</artifactId>
                <version>2.0.2</version>
</dependency>
<dependency>
                <groupId>org.jxls</groupId>
                <artifactId>jxls</artifactId>
                <version>2.4.6</version>
</dependency>

2:ExcelHead类:存放Excel表的表头信息,导入时要完全匹配表头信息才可导入

 1 public class ExcelHead {
 2     //读取表头
 3     private String head;
 4     //节点 这里要导入的Excel的表头必须和这儿完全匹配
 5     private String point = "节点编号*,节点名称*,节点描述,节点类别,仓库编号*,仓库名称*,是否自动接收*,备注";
 6     public String getHead() {
 7         return head;
 8     }
 9 
10     public void setHead(String head) {
11         if (StringUtil.isEmpty(this.head)) {
12             this.head = head.trim();
13         } else {
14             this.head = String.format("%s,%s", this.head, head.trim());
15         }
16     }
17 
18     public String getPoint() {
19         return point;
20     }
21 
22     public void setPoint(String point) {
23         this.point = point;
24     }
25 
26 }

point-body.xml文件.这里存放的是表体信息

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <workbook>
 3     <worksheet idx="0">
 4         <!-- 表头开始至结束行 -->
 5         <section startRow="0" endRow="0"/>
 6         <!-- 开始循环读取文件数据，配置开始行，items映射的list var映射的bean varType 类路径
 7             startRow：开始循环的行数
 8             endRow-startRow：循环体的大小，0代表一行，依次论推
 9             每循环一次，判断是否结束，不结束继续循环，直至结束
10         -->
11         <loop startRow="1" endRow="1" items="pointList" var="sku"
12               varType="com.eglsc.ams.domain.vo.PointVo">
13             <!-- 循环开始行 -->
14             <section startRow="1" endRow="1">
15                 <!-- 节点编号 -->
16                 <mapping row="1" col="0" nullAllowed="true">
17                     sku.pointNo
18                 </mapping>
19                 <!-- 节点名称 -->
20                 <mapping row="1" col="1" nullAllowed="true">
21                     sku.pointName
22                 </mapping>
23                 <!-- 节点描述 -->
24                 <mapping row="1" col="2" nullAllowed="true">
25                     sku.pointDescription
26                 </mapping>
27                 <!-- 节点类别 -->
28                 <mapping row="1" col="3" nullAllowed="true">
29                     sku.pointCategory
30                 </mapping>
31                 <!-- 仓库编号 -->
32                 <mapping row="1" col="4" nullAllowed="true">
33                     sku.siteNo
34                 </mapping>
35                 <!-- 仓库名称 -->
36                 <mapping row="1" col="5" nullAllowed="true">
37                     sku.siteName
38                 </mapping>
39                 <!-- 是否自动接收 -->
40                 <mapping row="1" col="6" nullAllowed="true">
41                     sku.automaticFlag
42                 </mapping>
43                 <!-- 备注 -->
44                 <mapping row="1" col="7" nullAllowed="true">
45                     sku.remark
46                 </mapping>
47             </section>
48             <!-- 结束条件配置 -->
49             <loopbreakcondition>
50                 <rowcheck offset="0">
51                     <!-- 空白结束不填 -->
52                     <cellcheck offset="0"></cellcheck>
53                 </rowcheck>
54             </loopbreakcondition>
55         </loop>
56     </worksheet>
57 </workbook>

point-head.xml文件.这里配置的是表头信息

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <workbook>
 3     <worksheet idx="0">
 4         <!-- 表头开始至结束行 -->
 5         <section startRow="0" endRow="0">
 6             <!-- 节点编号 -->
 7             <mapping row="0" col="0" nullAllowed="true">
 8                 excelHead.head
 9             </mapping>
10             <!-- 节点名称 -->
11             <mapping row="0" col="1" nullAllowed="true">
12                 excelHead.head
13             </mapping>
14             <!-- 节点描述 -->
15             <mapping row="0" col="2" nullAllowed="true">
16                 excelHead.head
17             </mapping>
18             <!-- 节点类别 -->
19             <mapping row="0" col="3" nullAllowed="true">
20                 excelHead.head
21             </mapping>
22             <!-- 仓库编号 -->
23             <mapping row="0" col="4" nullAllowed="true">
24                 excelHead.head
25             </mapping>
26             <!-- 仓库名称 -->
27             <mapping row="0" col="5" nullAllowed="true">
28                 excelHead.head
29             </mapping>
30             <!-- 是否自动接收 -->
31             <mapping row="0" col="6" nullAllowed="true">
32                 excelHead.head
33             </mapping>
34             <!--备注-->
35             <mapping row="0" col="7" nullAllowed="true">
36                 excelHead.head
37             </mapping>
38         </section>
39     </worksheet>
40 </workbook>

导入代码:

 2     @RequestMapping(value = "/import", method = RequestMethod.POST)
　　　　@Response
 3     @Transactional
 4     public Response importExcel(@RequestParam(required = true) MultipartFile file, HttpServletRequest request) {
 5         String fileName = file.getOriginalFilename().toLowerCase();
 6         if(!fileName.endsWith(".xls") && !fileName.endsWith(".xlsx")){
 7             throw new ApplicationException("请上传Excel文件");
 8         }
 9         //获取文件
10         CommonsMultipartFile commonsMultipartFile = (CommonsMultipartFile)file;
11         //获取xml文件头配置(我的xml文件是放在/template/import/point目录下的)
12         String xmlConfigPath = String.format("%s%s", request.getServletContext().getRealPath("/"), "/template/import/point/");
13         String xmlConfigName = String.format("%s%s", xmlConfigPath, "point-head.xml");
14         Map<String,Object> beans = new HashMap<>();
15         ExcelHead excelHead = new ExcelHead();
16         beans.put("excelHead",excelHead);
17         //解析文件头
18         this.parseExcelService.parseExcel(xmlConfigName,commonsMultipartFile,beans);
19         if(!excelHead.getPoint().equals(excelHead.getHead())){
20             throw new RuntimeException("模板错误");
21         }
22       　//获取文件体信息
23         xmlConfigName = String.format("%s%s", xmlConfigPath, "point-body.xml");
24         List<PointVo> pointVoList = new ArrayList<>();
25         beans.clear();
26         beans.put("pointList",pointVoList);
27         //解析文件体
28         parseExcelService.parseExcel(xmlConfigName,commonsMultipartFile,beans);
29         this.pointService.importExcel(pointVoList);
30         return Response.success("导入成功");
31     }

Response类携带着操作结束后的信息,供前端人员调用

执行到this.pointService.importExcel(pointVoList)这段代码意味着要导入的Excel中的数据已经放到pointList中了,执行pointService中的方法把数据批量导入进数据库中就完成了.

解析Excel工具类:ParseExcelService

public class ParseExcelService {

    /**
     * 解析Excel
     *
     * @param xmlConfigName        xml配置（字段和Excel单元格的映射）
     * @param commonsMultipartFile 上传的文件
     * @param beans                解析后的数据
     */
    public void parseExcel(String xmlConfigName, CommonsMultipartFile commonsMultipartFile, Map<String, Object> beans) {
        InputStream inputStream = null;
        FileInputStream xmlConfig = null;
        InputStream inputXML = null;
        InputStream inputXLS = null;
        try {
            //上传的文件流
            inputStream = commonsMultipartFile.getInputStream();
            //xml配置的文件流
            xmlConfig = new FileInputStream(xmlConfigName);
            //执行解析
            inputXML = new BufferedInputStream(xmlConfig);
            XLSReader mainReader = ReaderBuilder.buildFromXML(inputXML);
            inputXLS = new BufferedInputStream(inputStream);
            mainReader.read(inputXLS, beans);
        } catch (XLSDataReadException e) {
            logger.error("数据转换异常:", e);
            throw new ApplicationException("数据转换异常");
        } catch (InvalidFormatException e) {
            logger.error("无效格式异常:", e);
            throw new ApplicationException("无效格式异常");
        } catch (FileNotFoundException e) {
            logger.error("文件未找到:", e);
            throw new ApplicationException("文件未找到");
        } catch (SAXException e) {
            logger.error("SAX解析异常:", e);
            throw new ApplicationException("SAX解析异常");
        } catch (IOException e) {
            logger.error("IO流异常:", e);
            throw new ApplicationException("IO流异常");
        } finally {
            try {
                if (inputXLS != null)
                    inputXLS.close();
                if (inputXML != null)
                    inputXML.close();
                if (xmlConfig != null)
                    xmlConfig.close();
                if (inputStream != null)
                    inputStream.close();
            } catch (IOException e) {
                logger.error("parse excel error", e);
            }
        }
    }

}