SpringBoot项目中实现.json文件上传至MySQL

前面两篇文章实现了 Excel 文件的上传和下载。感兴趣的小伙伴可以点击链接看一下：

SpringBoot项目中集成EasyExcel实现Excel文件上传至MySQL

那一版本中，又有另一条需求。前端上传 .json 文件进来，不是上传 Excel ，好吧。。。
那我就兵来将挡水来土掩。直接解析 .json 文件不就完事了。所以直接就开干了。

1、contrller 层

@RestController
public class EasyExcelController {

    private static final Logger LOGGER = LoggerFactory.getLogger(EasyExcelController.class);

    @Autowired
    private EasyExcelDao easyExcelDao;

    @PostMapping(value = "/uploadFileFromJson",produces = "application/json;charset=UTF-8")
    public ResponseEntity<ReturnT<String>> uploadFileFromJson(@RequestParam(value = "mappingFile") MultipartFile mappingFile) {
        if (mappingFile == null) {
            return new ResponseEntity<>(new ReturnT<>(ReturnT.BAD_REQUEST, "Params can not be null"), HttpStatus.BAD_REQUEST);
        }
        InputStream is = null;
        BufferedReader br = null;
        StringBuffer sb = new StringBuffer();
        String str = null;

        try {
            is = mappingFile.getInputStream();
            br = new BufferedReader(new InputStreamReader(is));
            while ((str = br.readLine()) != null) {
                sb.append(str);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                br.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        JSONObject jsonObject = JSONObject.parseObject(sb.toString());
        JSONArray jsonArray = jsonObject.getJSONArray("data");
        List<EasyExcelData> eeDataList = JSONObject.parseArray(jsonArray.toJSONString(), EasyExcelData.class);

        int count = 0;
        try {
            count = easyExcelDao.uploadFileFromJson(eeDataList);
        } catch (Exception e) {
            e.printStackTrace();
        }

        if (count <= 0) {
            LOGGER.warn("no data to upload");
            return new ResponseEntity<>(new ReturnT<>(ReturnT.BAD_REQUEST, "no data to upload"), HttpStatus.BAD_REQUEST);
        }
        return new ResponseEntity<>(new ReturnT<>("successfully imported " + count + " pieces of data"), HttpStatus.OK);
    }
}

由于 service 业务层比较简单，我这里直接操作 dao 层了。

2、EasyExcelDao

public interface EasyExcelDao {

    int uploadFileFromJson(@Param("eeDataList") List<EasyExcelData> eeDataList);
    
}

3、EasyExcelMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.riemann.springbootdemo.dao.EasyExcelDao" >
    <sql id="BASE_TABLE">
      easy_excel_data
    </sql>

    <insert id="uploadFileFromJson" parameterType="com.riemann.springbootdemo.model.EasyExcelData">
        <selectKey keyProperty="pid" resultType="long">
            select LAST_INSERT_ID()
        </selectKey>
        INSERT INTO
        <include refid="BASE_TABLE"/>
        (
        name,sex,age,address,phone
        )
        VALUES
        <foreach collection="eeDataList" item="eeDataList" separator=",">
            (
            #{eeDataList.name, jdbcType=VARCHAR},
            #{eeDataList.sex, jdbcType=INTEGER},
            #{eeDataList.age, jdbcType=VARCHAR},
            #{eeDataList.address, jdbcType=INTEGER},
            #{eeDataList.phone, jdbcType=VARCHAR}
            )
        </foreach>

    </insert>

</mapper>