管道基础大数据平台系统开发-【后端】-Server
12
13693261870
2022-11-21 07a68b8d93aa059968a9709f2c81e6625338032c
src/main/java/com/lf/server/service/data/UploaderService.java
@@ -1,286 +1,13 @@
package com.lf.server.service.data;
import com.alibaba.fastjson.JSON;
import com.lf.server.controller.all.BaseController;
import com.lf.server.entity.all.HttpStatus;
import com.lf.server.entity.all.ResponseMsg;
import com.lf.server.entity.all.SettingData;
import com.lf.server.entity.ctrl.FileInfo;
import com.lf.server.entity.sys.AttachEntity;
import com.lf.server.entity.sys.UserEntity;
import com.lf.server.helper.FileHelper;
import com.lf.server.helper.PathHelper;
import com.lf.server.helper.StringHelper;
import com.lf.server.helper.WebHelper;
import com.lf.server.service.sys.AttachService;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tomcat.util.http.fileupload.FileItem;
import org.apache.tomcat.util.http.fileupload.disk.DiskFileItemFactory;
import org.apache.tomcat.util.http.fileupload.servlet.ServletFileUpload;
import org.apache.tomcat.util.http.fileupload.servlet.ServletRequestContext;
import org.springframework.beans.factory.annotation.Autowired;
import com.lf.server.service.all.BaseUploadService;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.ServletContext;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.*;
/**
 * 数据上传服务类
 * 上传服务类
 * @author WWW
 */
@Service
public class UploaderService {
    @Autowired
    PathHelper pathHelper;
    @Autowired
    AttachService attachService;
    private final static long ONE_DAY = 24 * 60 * 60 * 1000;
    private final static long SIZE_MAX = 1024 * 1024 * 1024 * 1024;
    private final static long FILE_SIZE_MAX = 256 * 1024 * 1024 * 1024;
    private final static Log log = LogFactory.getLog(UploaderService.class);
    private static final String NO_FILE = JSON.toJSONString(new ResponseMsg<String>(HttpStatus.NOT_FOUND, "文件找不到"));
    /**
     * 上传文件
     */
    public ResponseMsg<String> upload(UserEntity ue, String tab, MultipartFile file, BaseController ctrl) {
        try {
            if (file == null && file.isEmpty()) {
                return ctrl.fail("文件上传为空", null);
            }
            if (file.getSize() > SettingData.MAX_FILE_SIZE) {
                return ctrl.fail(String.format("文件大于 %d MB", SettingData.MAX_FILE_SIZE / 1024 / 1024), null);
            }
            // 传输文件
            String oldName = file.getOriginalFilename();
            String filePath = pathHelper.getTempPath() + File.separator + oldName;
            File newFile = new File(filePath);
            file.transferTo(newFile);
            // 获取MD5
            String md5 = getFileMd5(filePath);
            AttachEntity entity = attachService.selectByGuid(md5);
            if (entity != null) {
                newFile.delete();
                return ctrl.success("文件已存在", md5);
            }
            AttachEntity ae = getAttachEntity(ue, tab, oldName, md5);
            String targetPath = pathHelper.getConfig().getUploadPath() + File.separator + ae.getPath();
            newFile.renameTo(new File(targetPath));
            int rows = attachService.insert(ae);
            return rows > 0 ? ctrl.success(md5) : ctrl.fail("保存文件失败", null);
        } catch (Exception ex) {
            return ctrl.fail(ex.getMessage(), null);
        }
    }
    private String getFileMd5(String filePath) throws IOException {
        FileInputStream fileStream = new FileInputStream(filePath);
        String md5 = DigestUtils.md5Hex(fileStream);
        fileStream.close();
        return md5;
    }
    protected AttachEntity getAttachEntity(UserEntity ue, String tab, String oldName, String md5) {
        AttachEntity entity = new AttachEntity();
        entity.setName(oldName);
        entity.setTab(tab);
        entity.setGuid(md5);
        String subPath = PathHelper.getUploadPath() + File.separator + md5;
        entity.setPath(subPath);
        if (ue != null) {
            entity.setCreateUser(ue.getId());
        }
        return entity;
    }
    /**
     * 下载文件
     */
    public void download(String guid, HttpServletRequest req, HttpServletResponse res, BaseController ctrl) {
        try {
            if (StringHelper.isEmpty(guid)) {
                WebHelper.write2Page(res, NO_FILE);
                return;
            }
            AttachEntity entity = attachService.selectByGuid(guid);
            if (entity == null) {
                WebHelper.write2Page(res, NO_FILE);
                return;
            }
            setDownloadResponse(entity, res);
            String filePath = pathHelper.getConfig().getUploadPath() + File.separator + entity.getPath();
            // 通过response对象,获取到输出流
            ServletOutputStream outputStream = res.getOutputStream();
            // 定义输入流,通过输入流读取文件内容
            FileInputStream fileInputStream = new FileInputStream(filePath);
            int len = 0;
            byte[] bytes = new byte[1024];
            while ((len = fileInputStream.read(bytes)) != -1) {
                // 通过输入流读取文件数据,然后通过上述的输出流写回浏览器
                outputStream.write(bytes, 0, len);
                outputStream.flush();
            }
            // 关闭资源
            outputStream.close();
            fileInputStream.close();
        } catch (Exception ex) {
            try {
                String msg = JSON.toJSONString(new ResponseMsg<String>(HttpStatus.ERROR, "文件下载出错"));
                WebHelper.write2Page(res, msg);
            } catch (Exception e) {
                log.error(e.getMessage() + e.getStackTrace() + "\n");
            }
            log.error(ex.getMessage() + ex.getStackTrace() + "\n");
        }
    }
    private void setDownloadResponse(AttachEntity entity, HttpServletResponse res) throws IOException {
        String fileName = URLEncoder.encode(entity.getName(), "UTF-8");
        // 设置响应头中文件的下载方式为附件方式,以及设置文件名
        res.setHeader("Content-Disposition", "attachment; filename=" + fileName);
        // 设置响应头的编码格式为UTF-8
        res.setCharacterEncoding("UTF-8");
        // 通过response对象设置响应数据格式(如:"text/plain; charset=utf-8")
        String ext = FileHelper.getExtension(entity.getName());
        String mime = FileHelper.getMime(ext);
        res.setContentType(mime);
    }
    /**
     * 上传文件
     */
    public void uploadData(HttpServletRequest req, HttpServletResponse res) {
        try {
            // 处理中文乱码问题
            req.setCharacterEncoding("utf-8");
            res.setContentType("text/html;charset=utf-8");
            // 检查请求是/否为multipart/form-data类型
            if (!ServletFileUpload.isMultipartContent(req)) {
                throw new RuntimeException("表单的enctype属性不是multipart/form-data类型");
            }
            // 创建上传所需要的两个对象:磁盘文件对象+文件上传对象
            DiskFileItemFactory factory = new DiskFileItemFactory();
            ServletFileUpload sfu = new ServletFileUpload(factory);
            ServletRequestContext ctx = new ServletRequestContext(req);
            // 限制上传的总文件大小
            sfu.setSizeMax(SIZE_MAX);
            // 限制单个文件的大小
            sfu.setFileSizeMax(FILE_SIZE_MAX);
            // 设置编码方式
            sfu.setHeaderEncoding("utf-8");
            // list容器用来保存表单中的所有数据信息
            List<FileItem> items = sfu.parseRequest(ctx);
            copeFileItems(items, req);
        } catch (Exception ex) {
            log.error(ex.getMessage() + ex.getStackTrace() + "\n");
        }
    }
    /**
     * 处理解析内容:处理普通表单域和文件表单域
     */
    private void copeFileItems(List<FileItem> items, HttpServletRequest req) throws Exception {
        Map<String, String> map = new HashMap<String, String>(3);
        List<FileInfo> list = new ArrayList<FileInfo>();
        String path = pathHelper.getTempPath();
        for (FileItem item : items) {
            if (item.isFormField()) {
                String key = item.getFieldName();
                String value = item.getString("utf-8");
                map.put(key, value);
                continue;
            }
            FileInfo fi = copeFile(item, path, req);
            if (fi != null) {
                list.add(fi);
            }
        }
    }
    /**
     * 处理文件
     */
    private FileInfo copeFile(FileItem item, String path, HttpServletRequest req) {
        try {
            // 获取文件名,判断是否合法
            FileInfo fi = new FileInfo(item.getName());
            if (StringHelper.isEmpty(fi.getFileName())) {
                return null;
            }
            fi.setSize(item.getSize());
            fi.setPath(path + File.separator + fi.getFileName());
            item.write(new File(fi.getPath()));
            return fi;
        } catch (Exception ex) {
            log.error(ex.getMessage() + ex.getStackTrace() + "\n");
            return null;
        }
    }
    private void handleFileField(FileItem item, HttpServletRequest req) {
        // 获取 文件数据项中的 文件名
        String fileName = item.getName();
        // 控制只能上传图片
        String img = "image";
        if (!item.getContentType().startsWith(img)) {
            return;
        }
        // 获取 当前项目下的 /files 目录的绝对位置
        ServletContext ctx = req.getSession().getServletContext();
        String path = ctx.getRealPath("/files");
        // 创建 file对象
        File file = new File(path);
        if (!file.exists()) {
            // 创建目录
            file.mkdir();
        }
        // 将文件保存到服务器上(UUID是通用唯一标识码)
        try {
            item.write(new File(file.toString(), UUID.randomUUID() + "_" + fileName));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
public class UploaderService extends BaseUploadService {
    //
}