Spring boot + Spring data jpa + Thymeleaf
批量插入 + POI读取 + 文件上传

pom.xml：

<!-- https://mvnrepository.com/artifact/org.apache.poi/poi --><dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.17</version></dependency><!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml --><dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.17</version></dependency>

upload.html：

<form enctype="multipart/form-data" method="post" action="/upload/excel"> 文件 <input type="file" name="file" /> <input type="submit" value="上传" /></form>

如果自己的项目中使用了Spring security，页面提交文件之后，会出现403的错误，最快的解决办法，如下：

http.csrf().ignoringAntMatchers("/upload/**").

在security的配置文件中，加入上边的代码即可。当然还有其他的办法，大家可在网上查找。

Controller：

package org.meng.project.controller; import org.meng.project.service.ExcelService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.*;import org.springframework.web.multipart.MultipartFile; import javax.servlet.http.HttpServletRequest; /** *<p><b>上传Controller类</b></p> *<p> 上传文件的Controller</p> * @Author MengMeng * @Date 2018/10/6 </p> * @version: 0.1 * @since JDK 1.80_144 */@Controller@RequestMapping("/upload")public class UploadController { @Autowired private HttpServletRequest request; @Autowired private ExcelService excelService; //跳转到上传文件的页面 @RequestMapping(value = "", method = RequestMethod.GET) public String goUpload() { //跳转到 templates 中tools目录下的 upload.html return "tools/upload"; } @RequestMapping(value = "/excel",method = RequestMethod.POST) public String upload(MultipartFile file, Model model) throws Exception { boolean flag = excelService.getExcel(file); if(flag){ model.addAttribute("Message", "上传成功"); }else{ model.addAttribute("Message", "上传失败"); } return "tools/upload"; } }

Excel实体：

package org.meng.project.entity; import javax.persistence.*;import java.io.Serializable;import java.util.Objects; /** * <p><b>用户实体类</b></p> * @ClassName User * @Author MengMeng * @Date 2018/10/6 </p> * @Version: 0.1 * @Since JDK 1.80_171 */ @Entity@Table(name = "test", schema = "project")public class Excel implements Serializable { private static final long serialVersionUID = 1L; @Id @Column(length=36) private String id; @Column(length=45,nullable=false,unique=true) private String username; @Column(length=100,nullable=false,unique=true) private String email; @Column(length=45,nullable=false) private String password; @Column(length=45) private String role; public Excel() { } public Excel(Excel user){ this.id = user.getId(); this.username = user.getUsername(); this.role = user.getRole(); this.email = user.getEmail(); this.password = user.getPassword(); } //get 和 set}

Service：

package org.meng.project.service; import com.alibaba.fastjson.JSON; import org.meng.project.entity.*;import org.springframework.data.jpa.repository.Modifying;import org.springframework.data.jpa.repository.Query;import org.springframework.web.multipart.MultipartFile; import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.transaction.Transactional; /** *<p><b>Excel的Service类接口</b></p> *<p> Excel的Service类接口，与Excel有关的业务逻辑方法</p> * @Author MengMeng * @Date 2018/10/6 </p> * @version: 0.1 * @since JDK 1.80_144 */public interface ExcelService { boolean getExcel(MultipartFile file) throws Exception; }

ServiceImpl：

package org.meng.project.service; import org.apache.poi.EncryptedDocumentException;import org.apache.poi.openxml4j.exceptions.InvalidFormatException;import org.apache.poi.ss.usermodel.*;import org.apache.poi.ss.usermodel.WorkbookFactory;import org.meng.project.entity.*;import org.meng.project.repository.ExcelRepository;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import org.springframework.web.multipart.MultipartFile; import java.io.IOException;import java.util.*; /** * <p><b>Excel的Service类</b></p> * <p>Excel的Service类，与User有关的业务逻辑方法</p> * @Author MengMeng * @Date 2018/10/6 * @version: 0.1 * @since JDK 1.80_144 */@Servicepublic class ExcelServiceImpl implements ExcelService { @Autowired private ExcelRepository excelRepository; @Override public boolean getExcel(MultipartFile file) throws Exception { // TODO Auto-generated method stub List<Excel> list = new ArrayList<Excel>(); //1.得到上传的表 Workbook workbook2 = WorkbookFactory.create(file.getInputStream()); //2、获取test工作表 Sheet sheet2 = workbook2.getSheet("test"); //获取表的总行数 int num = sheet2.getLastRowNum(); //System.out.println(num); //总列数 int col = sheet2.getRow(0).getLastCellNum(); //遍历excel每一行 for (int j = 0; j <= num; j++) { Row row1 = sheet2.getRow(j); //如果单元格中有数字或者其他格式的数据，则调用setCellType()转换为string类型 Cell cell1 = row1.getCell(0); cell1.setCellType(CellType.STRING); //获取表中第i行，第2列的单元格 Cell cell2 = row1.getCell(1); //excel表的第i行，第3列的单元格 Cell cell3 = row1.getCell(2); cell3.setCellType(CellType.STRING); Cell cell4 = row1.getCell(3); Cell cell5 = row1.getCell(4); //这里new 一个对象，用来装填从页面上传的Excel数据，字段根据上传的excel决定 Excel excel= new Excel(); excel.setId(cell1.getStringCellValue()); excel.setEmail(cell2.getStringCellValue()); excel.setPassword(cell3.getStringCellValue()); excel.setRole(cell4.getStringCellValue()); excel.setUsername(cell5.getStringCellValue()); list.add(excel); } excelRepository.saveAll(list); return true; }}

注意：需统一数据库和Excel表中数据值的类型，不然会出现Cannot get a STRING value from a NUMERIC cell等错误。

Repository：

package org.meng.project.repository; import org.meng.project.entity.Excel;import org.meng.project.repository.base.BaseRepository;import org.springframework.data.domain.Page;import org.springframework.data.domain.Pageable;import org.springframework.data.jpa.repository.Query;import org.springframework.stereotype.Repository; /** *<p><b>Excel的DAO类接口</b></p> *<p> Excel的DAO类接口，与Excel有关的持久化操作方法</p> * @Author MengMeng * @Date 2018/10/6 </p> * @version: 0.1 * @since JDK 1.80_144 */@Repositorypublic interface ExcelRepository extends BaseRepository<Excel, String> { }

即可实现文件上传：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。