Java Excel导出, 导入 支持2007 xlsx, 2003 xls (org.apache.poi, poi-ooxml)基本用法(二) 亲测

1. Maven包

      
        org.apache.poi
        poi
        3.10-FINAL
      
      
        org.apache.poi
        poi-ooxml
        3.10-FINAL
      
      

2. 数据库 test 和数据表 user及相关测试数据

CREATE DATABASE `test` DEFAULT CHARSET utf8;
CREATE TABLE `user` (
  `id` int(20) NOT NULL AUTO_INCREMENT,
  `name` varchar(20) DEFAULT NULL,
  `age` int(20) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=0 DEFAULT CHARSET=utf8;

3. User.java(Entity)与 user数据表字段对应

import java.io.Serializable;

public class User implements Serializable {
    private static final long serialVersionUID = 8755803182642361875L;

    private Long id;

    private Long age;

    private String name;

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Long getAge() {
        return age;
    }

    public void setAge(Long age) {
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

}

4. DAO(Data Access Object)数据访问接口 UserDao.java和实现类 UserDaoImpl.java

/**
* User的数据访问接口 UserDao.java
*/
import com.test.web2.entity.User;
import java.util.List;

public interface UserDao {
    void create(List users);
}

/**
* 实现类 UserDaoImpl.java
*/
import com.test.web2.dao.UserDao;
import com.test.web2.entity.User;
import org.apache.ibatis.session.SqlSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import java.util.List;

@Repository
public class UserDaoImpl implements UserDao {
    @Autowired
    private SqlSession sqlSession;

    static final String MAPPER = "com.test.web2.UserMapper.";

    @Override
    public void create(final List users) {
        sqlSession.insert(MAPPER + "create", users);
    }

}

5. UserMapper.xml

	
		INSERT INTO
		`user`
		(`id`,`name`,`age`)
		VALUES
		
			(
			#{item.id},
			#{item.name},
			#{item.age}
			)
		
	

6. ExcelUtil.java相关工具类

public class ExcelUtil {
    /** 版本2007*/
    public final static String XLSX = "xlsx";

    public List> readXlsx(final String path) throws Exception {
        final InputStream is = new FileInputStream(path);
        final XSSFWorkbook xssfWorkbook = new XSSFWorkbook(is);
        final List> result = new ArrayList<>();
        for (XSSFSheet xssfSheet : xssfWorkbook) {
            if (xssfSheet == null) {
                continue;
            }

            for (int rowNum = 1; rowNum <= xssfSheet.getLastRowNum(); rowNum++) {
                final XSSFRow xssfRow = xssfSheet.getRow(rowNum);
                final int minColIx = xssfRow.getFirstCellNum();
                final int maxColIx = xssfRow.getLastCellNum();
                final List rowList = new ArrayList<>();
                for (int colIx = minColIx; colIx < maxColIx; colIx++) {
                    final XSSFCell cell = xssfRow.getCell(colIx);
                    if (cell == null) {
                        continue;
                    }
                    rowList.add(cell.toString());
                }
                result.add(rowList);
            }
        }

        return result;
    }

    /** 版本2003*/
    public final static String XLS = "xls";

    public List> readXls(final String path) throws Exception {
        final InputStream is = new FileInputStream(path);
        final HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
        final List> result = new ArrayList<>();
        final int size = hssfWorkbook.getNumberOfSheets();
        for (int numSheet = 0; numSheet < size; numSheet++) {
            final HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
            if (hssfSheet == null) {
                continue;
            }
            for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum++) {
                final HSSFRow hssfRow = hssfSheet.getRow(rowNum);
                final int minColIx = hssfRow.getFirstCellNum();
                final int maxColIx = hssfRow.getLastCellNum();
                final List rowList = new ArrayList<>();
                for (int colIx = minColIx; colIx < maxColIx; colIx++) {
                    final HSSFCell cell = hssfRow.getCell(colIx);
                    if (cell == null) {
                        continue;
                    }
                    rowList.add(getStringVal(cell));
                }
                result.add(rowList);
            }
        }

        return result;
    }

    public static String getStringVal(final HSSFCell cell) {
        switch (cell.getCellType()) {
            case Cell.CELL_TYPE_BOOLEAN:
                return cell.getBooleanCellValue() ? "TRUE" : "FALSE";
            case Cell.CELL_TYPE_FORMULA:
                return cell.getCellFormula();
            case Cell.CELL_TYPE_NUMERIC:
                cell.setCellType(Cell.CELL_TYPE_STRING);
                return cell.getStringCellValue();
            case Cell.CELL_TYPE_STRING:
                return cell.getStringCellValue();
            default:
                return "";
        }
    }

}

7. UserController.java(入口)

@Controller
public class UserController {
    @Autowired
    private UserDao userDao;

    /**
     * 上传 Excel文件批量导入用户信息 支持 [.xlsx/ .xls] 两种分别是 版本2007/ 版本2003
     * */
    @PostMapping("/importUsersExcelFile")
    public @ResponseBody Map importUsersExcelFile(@RequestParam("file") MultipartFile[] multfiles) {
        final Map resp = new HashMap<>();

        /** 上传文件数*/
        final int fileCount = multfiles.length;
        if (fileCount == 0) {
            resp.put("message", "请选择文件！");
        }

        String lastFilePath;

        final List allRows = new ArrayList<>();
        for (int i = 0; i < fileCount; i++) {

            /** 源文件名称*/
            final String originalFileName = multfiles[i].getOriginalFilename();
            if (StringUtils.isBlank(originalFileName) || (!originalFileName.endsWith(ExcelUtil.XLS) && !originalFileName.endsWith(ExcelUtil.XLSX))) {
                continue;
            }

            /** 文件后缀*/
            final String suffix = originalFileName.substring(originalFileName.lastIndexOf("."));
            final String newFileName = String.valueOf(System.currentTimeMillis() + suffix);

            /** 今天日期(用于文件名)*/
            final String date = DateTimeFormatter.ofPattern("yyyy-MM-dd").format(LocalDateTime.now());

            final String relativePath = File.separator + date;
            final String filePath = "D:\\file" + relativePath;
            final File targetFile = new File(filePath);
            if (!targetFile.exists()) {
                targetFile.mkdirs();
            }

            FileOutputStream out = null;
            try {
                lastFilePath = filePath + File.separator + newFileName;
                out = new FileOutputStream(lastFilePath);
                out.write(multfiles[i].getBytes());

                List> result;
                if (originalFileName.endsWith(ExcelUtil.XLS)) {
                    result = new ExcelUtil().readXls(lastFilePath);
                } else {
                    result = new ExcelUtil().readXlsx(lastFilePath);
                }

                for (int i2 = 0; i2 < result.size(); i2++) {
                    final List model = result.get(i2);
                    final User user = new User();

                    /** 用户编号*/
                    final Long id = Long.parseLong(model.get(0));
                    user.setId(id);

                    /** 用户称呼*/
                    user.setName(model.get(1));

                    /** 用户年龄*/
                    final Long age = Long.parseLong(model.get(2));
                    user.setAge(age);

                    allRows.add(user);
                }
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                if (out != null) {
                    try {
                        out.flush();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    try {
                        out.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }

        if (allRows.isEmpty()) {
            resp.put("message", "导入失败！");
        } else {
            userDao.create(allRows);
        }

        resp.put("message", "导入成功！");
        return resp;
    }

}

导入用户列表 格式类型

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