springboot文件保存

控制器层reportscontroller，文件实体类FileInfo，json信息类Responemsg，持久层FileMapper
接收前端的JSON，然后进行解析，提取出base64字符串。把base64解码回图片文件，然后进行文件md5，最后本地持久化和存入数据库。
这里前端json数据

{
    "base64": "用这个网址http://www.ofmonkey.com/encrypt/image64把一张图片转成base64编码，去掉数据的头部信息data:image/png;base64 ,留下数据的主体部分",
    "length": 6,
    "name": "fdfsadfas.jpg"
}

一开始try/catch的时候没有在catch中打印输出，所以报错了都不知道。

@RestController
@RequestMapping("/file")
public class reportscontroller {

    @Value("${fileup}")
    private String fileup;
    @Value("${reportup}")
    private String reportup;
    @Value("${backgroud}")
    private String backgroud;
    @Value("${picture}")
    private String picture;

    @Autowired
    FileMapper fileMapper;

    @RequestMapping(value = "/upload", method = {RequestMethod.GET,RequestMethod.POST})
    public String addPicture(HttpServletRequest request, @RequestBody String file){
        Responemsg responemsg=new Responemsg();
        FileInfo fileInfo = new FileInfo();

        if (file.isEmpty()){
            return new Gson().toJson(responemsg);
        }

        try {

            JSONObject jSONObject = JSONObject.fromObject(file);

            // 拆分原文件名
            String base64 = jSONObject.getString("base64");
            int length = jSONObject.getInt("length");

            // 将base64转成文件
            if (Strings.isEmpty(base64)){
                return new Gson().toJson(new Responemsg());
            }

            // 判断文件是否一致
//            if (base64.length() != length) {
//                return new Gson().toJson(new Responemsg());
//            }

            String name = jSONObject.getString("name");
            int i = name.indexOf(".");
            fileInfo.setFname(name.substring(0, i));
            fileInfo.setFext(name.substring(i));

            // 系统生成文件名
            SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmss");
            String format = formatter.format(new Date().getTime());
            int num = (int)(Math.random() * 1000);
            fileInfo.setSysname(format+num);


            File file1 = new File(reportup);
            if (!file1.exists()){
                file1.mkdirs();
            }else {
                fileInfo.setFpath(reportup+fileInfo.getSysname()+fileInfo.getFext());
                File file2 = new File(reportup+fileInfo.getSysname()+fileInfo.getFext());

                // 将base64转成文件
                byte[] bytes = Base64.getDecoder().decode(base64);
                BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file2));
                bos.write(bytes);

                // 文件md5
                String md5 = DigestUtils.md5DigestAsHex(new FileInputStream(file2));
                fileInfo.setFmd5(md5);
            }

            if (fileMapper.insertpicture(fileInfo) > 0){
                responemsg.setCode("200");
                responemsg.setMsg("上传成功");
            }else {
                return new Gson().toJson(responemsg);
            }

        }catch (Exception ee){
            ee.printStackTrace();
        }

        return new Gson().toJson(responemsg);
    }

}

public class Responemsg {
    public String code="default";
    public String msg="操作失败";
    public String data;

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public String getData() {
        return data;
    }

    public void setData(String data) {
        this.data = data;
    }
}

@Mapper
@Repository
public interface FileMapper {

    // 添加图片信息
    @Insert("insert into fileinfo(fname, sysname, fext, fmd5, fpath)values(#{fname}, #{sysname}, #{fext}, #{fmd5}, #{fpath});")
    @Options(useGeneratedKeys = true, keyProperty = "fid", keyColumn = "fid")
    int insertpicture(FileInfo fileInfo);

    // 查询图片信息列表
    @Select("select * from fileinfo")
    List<FieldInfo> getFileInfoList();

    // 根据id查询图片细节
    @Select("select * from fileinfo where fid=#{fid}")
    FileInfo getFileDetail(@Param("fid") Long fid);

    // 根据id删除指定图片
    @Delete("delete from fileinfo where fid=#{fid}")
    int deleteFileById(@Param("fid") Long fid);
}

public class FileInfo {
    private Long fid;
    private String fname;
    private String sysname;
    private String fext;
    private String fmd5;
    private String fpath;

    public FileInfo() {
    }

    public FileInfo(Long fid, String fname, String sysname, String fext, String fmd5, String fpath) {
        this.fid = fid;
        this.fname = fname;
        this.sysname = sysname;
        this.fext = fext;
        this.fmd5 = fmd5;
        this.fpath = fpath;
    }

    public Long getFid() {
        return fid;
    }

    public void setFid(Long fid) {
        this.fid = fid;
    }

    public String getFname() {
        return fname;
    }

    public void setFname(String fname) {
        this.fname = fname;
    }

    public String getSysname() {
        return sysname;
    }

    public void setSysname(String sysname) {
        this.sysname = sysname;
    }

    public String getFext() {
        return fext;
    }

    public void setFext(String fext) {
        this.fext = fext;
    }

    public String getFmd5() {
        return fmd5;
    }

    public void setFmd5(String fmd5) {
        this.fmd5 = fmd5;
    }

    public String getFpath() {
        return fpath;
    }

    public void setFpath(String fpath) {
        this.fpath = fpath;
    }

    @Override
    public String toString() {
        return "FileInfo{" +
                "fid=" + fid +
                ", fname='" + fname + '\'' +
                ", sysname='" + sysname + '\'' +
                ", fext='" + fext + '\'' +
                ", fmd5='" + fmd5 + '\'' +
                ", fpath='" + fpath + '\'' +
                '}';
    }
}

json所需要的依赖

<dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <!--<version>2.8.5</version>-->
        </dependency>

        <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.4</version>
            <classifier>jdk15</classifier>
        </dependency>
        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.7.0</version>
        </dependency>
        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>3.1</version>
        </dependency>
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.5</version>
        </dependency>
        <dependency>
            <groupId>net.sf.ezmorph</groupId>
            <artifactId>ezmorph</artifactId>
            <version>1.0.3</version>
        </dependency>
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>