java – 如何上传文件并在db中保存文件使用spring boot和jpa？

2023年4月29日 219次阅读

我是春季启动的新手.我想上传一个小文件使用
spring boot并将其保存在db use jpa中.

但我没有很好的解决方案.

我的程序是这样的：

数据库表：

CREATE TABLE `report` (
  `id` int(10) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) NOT NULL,
  `logo` BLOB NOT NULL,
  `created_time` int(10) NOT NULL,
  `updated_time` int(10) NOT NULL
) ENGINE=InnoDB AUTO_INCREMENT=13 DEFAULT CHARSET=utf8

jpa bean：
Report.java

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Lob;
import javax.persistence.Table;
import java.io.Serializable;

@Entity
@Table(name="mf_report")
public class Report implements Serializable{
    @Column(name="id")
    private int id;

    @Column(name="name")
    private String name;

    @Lob
    @Column(name="logo", length=100000)
    private byte[] logo;

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public byte[] getLogo() {
        return logo;
    }

    public void setLogo(byte[] logo) {
        this.logo = logo;
    }
}

ReportReposity.java：

@Repository
public interface ReportRepository extends CrudRepository<Report,Long>{
}

ReportService.java：

@Service
public class ReportService extends CrudService<Report, ReportRepository> {

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

    @Override
    @Autowired
    public void setRepo(ReportRepository repo) {
        this.repo = repo;
    }

    @Override
    public Report copy(Report from, Report to) {
        to = from;
        return to;
    }

    @Autowired
    private ReportRepository reportRepository;

    public boolean saveReportByRequestBean(ReportAddQueryRequest reportBeanQueryRequest){
    try {
        Report report = new Report();
        report.setName(reportBeanQueryRequest.getName());
        report.setLogo(reportBeanQueryRequest.getLogo());
        long now = System.currentTimeMillis()/1000;
        report.setCreateTime(now);
        report.setUpdateTime(now);
        this.save(report);
    }catch (Exception e){
        logger.error("save report error:", e);
        return false;
    }
    return true;
}
}

ReportParamBean.java：

import org.hibernate.validator.constraints.NotEmpty;
import java.io.Serializable;

public class ReportParamBean extends AbsRequest implements Serializable {
    private long reportId;
    @NotEmpty(message = "Param 'name' can't be NULL")
    private String name;
    private String logo;// In fact, I don't know what type should logo be, File or ?
}

AbsRequest.java：

public class AbsRequest implements Serializable {
    private static final long serialVersionUID = -8928786145900600868L;
    @NotEmpty(message = "Param 'token' can't be NULL")
    @NotNull
    private String token;
    @NotEmpty(message = "Param 'sign' can't be NULL")
    private String sign;
    @Min(value = 1, message = "Param 'time' is invalid")
    private Long time;
    @Min(value = -1, message = "Param 'nodeId' is invalid")
    @NotNull(message = "Param 'nodeId' can't be NULL")
    private Long nodeId;
    private String nodeName;
    @Override
    public String toString() {
        return new ToStringBuilder(this)
                .append("token", token)
                .append("sign", sign)
                .append("time", time)
                .append("nodeId", nodeId)
                .append("nodeName", nodeName)
                .toString();
    }

    public String getToken() {
        return token;
    }

    public void setToken(String token) {
        this.token = token;
    }

    public String getSign() {
        return sign;
    }

    public void setSign(String sign) {
        this.sign = sign;
    }

    public Long getTime() {
        return time;
    }

    public void setTime(Long time) {
        this.time = time;
    }

    public Long getNodeId() {
        return nodeId;
    }

    public void setNodeId(Long nodeId) {
        this.nodeId = nodeId;
    }

    public String getNodeName() {
        return nodeName;
    }

    public void setNodeName(String nodeName) {
        this.nodeName = nodeName;
    }
}

ReportController.java：

@RestController
@RequestMapping("/api")
public class ReportController {

    @Autowired
    private ReportService reportService;

    @RequestMapping(value = "/report", method = RequestMethod.POST, produces = MediaTypes.JSON_UTF_8)
    public JSONObject createReport(@RequestBody ReportAddQueryRequest reportBeanQueryRequest){
        boolean result = reportService.saveReportByRequestBean(reportBeanQueryRequest);
        if (!result){
            return ResponseWrapper.buildResponse(RTCodeEnum.C_SERVICE_NOT_AVAILABLE, "add report failed");
        }
        return ResponseWrapper.buildResponse(RTCodeEnum.C_OK, "add report success");
    }
}

我不知道是否可以在一个帖子请求中将文件和其他参数发布到服务器,然后将数据保存在db中.你可以给我解决.
特别感谢.

最佳答案 使用Spring的
multipart file.在简单的实现中,您可以从中获取InputStream,将文件的内容(在hdd中保存)读取到字节数组并将其保存到数据库.

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