SpringBoot解析Excel

现在很多web应用中，导入excel导出excel很常见，这篇文章就讲讲导入excel文件。

以批量导入课程为例

首先加入需要的jar包

        
		
			org.apache.poi
			poi
			RELEASE
		
		
			org.apache.poi
			poi-ooxml
			RELEASE
		

数据库中创建一个表course

DROP TABLE IF EXISTS `course`;
CREATE TABLE `course`  (
  `course_id` int(10) NOT NULL AUTO_INCREMENT COMMENT '课程id',
  `course_code` varchar(100) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT '课程代码',
  `course_name` varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT '课程名称',
  `teacher_id` varchar(100) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT '教师id',
  `course_time` date NOT NULL DEFAULT '1996-01-01' COMMENT '开课时间',
  `class_room` varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT '开课地点',
  `course_week` int(5) UNSIGNED NOT NULL DEFAULT 0 COMMENT '课程学时',
  `course_type` varchar(100) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '必修课' COMMENT '课程类型',
  `college_id` int(11) UNSIGNED NOT NULL COMMENT '所属院系id',
  `score` int(5) UNSIGNED NOT NULL DEFAULT 0 COMMENT '学分',
  `is_on` tinyint(2) UNSIGNED NOT NULL DEFAULT 0 COMMENT '是否开启了选课，默认0未开启',
  PRIMARY KEY (`course_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 7 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci COMMENT = '课程表' ROW_FORMAT = Dynamic;

新建一个ExcelUtil.java

/**
 * excel工具类
 */
public class ExcelUtils {

    private static Logger logger = LoggerFactory.getLogger(ExcelUtils.class);

    /**
     * 课程excel
     * @param in
     * @param fileName
     * @return
     * @throws Exception
     */
    public static List getCourseListByExcel(InputStream in, String fileName) throws Exception {

        List list = new ArrayList<>();

        // 创建excel工作簿
        Workbook work = getWorkbook(in, fileName);
        if (null == work) {
            throw new Exception("创建Excel工作薄为空！");
        }

        Sheet sheet = null;
        Row row = null;
        Cell cell = null;

        for (int i = 0; i < work.getNumberOfSheets(); i++) {

            sheet = work.getSheetAt(i);
            if(sheet == null) {
                continue;
            }

            // 滤过第一行标题
            for (int j = sheet.getFirstRowNum(); j <= sheet.getLastRowNum(); j++) {
                row = sheet.getRow(j);
                if (row == null || row.getFirstCellNum() == j) {
                    continue;
                }

                List