package com.lf.server.service.all;
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import com.lf.server.controller.all.BaseController;
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import com.lf.server.entity.all.ResponseMsg;
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import com.lf.server.entity.sys.AttachEntity;
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import com.lf.server.entity.sys.UserEntity;
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import com.lf.server.helper.PathHelper;
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import com.lf.server.service.sys.AttachService;
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import com.sun.xml.internal.fastinfoset.tools.XML_SAX_StAX_FI;
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import org.apache.commons.codec.digest.DigestUtils;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.tomcat.util.http.fileupload.FileItem;
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import org.apache.tomcat.util.http.fileupload.disk.DiskFileItemFactory;
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import org.apache.tomcat.util.http.fileupload.servlet.ServletFileUpload;
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import org.apache.tomcat.util.http.fileupload.servlet.ServletRequestContext;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import org.springframework.web.multipart.MultipartFile;
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import javax.servlet.ServletContext;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.util.List;
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import java.util.UUID;
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/**
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* 文件服务类
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* @author WWW
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*/
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@Service
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public class FileService {
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@Autowired
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PathHelper pathHelper;
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@Autowired
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AttachService attachService;
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private static long MAX_FILE_SIZE = 20 * 1024 * 1024;
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private final static Log log = LogFactory.getLog(FileService.class);
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public ResponseMsg<String> upload(UserEntity ue, String tab, MultipartFile file, BaseController ctrl) {
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try {
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if (file == null && file.isEmpty()) {
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return ctrl.fail("文件上传为空", null);
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}
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if (file.getSize() > MAX_FILE_SIZE) {
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return ctrl.fail(String.format("文件大于 %d MB", MAX_FILE_SIZE / 1024 / 1024), null);
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}
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// 传输文件
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String oldName = file.getOriginalFilename();
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String filePath = pathHelper.getConfig().getTempPath() + File.separator + oldName;
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File newFile = new File(filePath);
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file.transferTo(newFile);
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// 获取MD5
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String md5 = getFileMd5(filePath);
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AttachEntity entity = attachService.selectByGuid(md5);
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if (entity != null) {
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newFile.delete();
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return ctrl.success("文件已存在", md5);
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}
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String uploadPath = pathHelper.getUploadFullPath();
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String targetPath = uploadPath + File.separator + md5;
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newFile.renameTo(new File(targetPath));
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AttachEntity ae = getAttachEntity(ue, tab, oldName, md5);
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int rows = attachService.insert(ae);
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return rows > 0 ? ctrl.success(md5) : ctrl.fail("保存文件失败", null);
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} catch (Exception ex) {
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return ctrl.fail(ex.getMessage(), null);
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}
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}
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private String getFileMd5(String filePath) throws IOException {
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FileInputStream fileStream = new FileInputStream(filePath);
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String md5 = DigestUtils.md5Hex(fileStream);
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fileStream.close();
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return md5;
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}
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protected AttachEntity getAttachEntity(UserEntity ue, String tab, String oldName, String md5) {
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AttachEntity entity = new AttachEntity();
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entity.setName(oldName);
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entity.setTab(tab);
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entity.setGuid(md5);
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String subPath = PathHelper.getUploadPath() + File.separator + md5;
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entity.setPath(subPath);
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if (ue != null) {
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entity.setCreateUser(ue.getId());
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}
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return entity;
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}
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/**
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* 上传文件
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*
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* @param req
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* @param res
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*/
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public void upload(HttpServletRequest req, HttpServletResponse res) {
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try {
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// 处理中文乱码问题
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req.setCharacterEncoding("utf-8");
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res.setContentType("text/html;charset=utf-8");
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// 检查请求是/否是multipart/form-data类型
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if (!ServletFileUpload.isMultipartContent(req)) {
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throw new RuntimeException("表单的enctype属性不是multipart/form-data类型！！");
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}
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// 创建上传所需要的两个对象：磁盘文件对象+文件上传对象
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DiskFileItemFactory factory = new DiskFileItemFactory();
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ServletFileUpload sfu = new ServletFileUpload(factory);
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ServletRequestContext ctx = new ServletRequestContext(req);
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//限制单个文件的大小
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sfu.setFileSizeMax(1024 * 10);
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//限制上传的总文件大小
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sfu.setSizeMax(1024 * 200);
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// 设置编码方式
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sfu.setHeaderEncoding("utf-8");
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// list容器用来保存表单中的所有数据信息
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List<FileItem> items = sfu.parseRequest(ctx);
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// 遍历容器，处理解析的内容：一个处理普通表单域，一个处理文件的表单域
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for (FileItem item : items) {
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if (item.isFormField()) {
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handleFormField(item);
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} else {
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handleFileField(item, req);
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}
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}
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} catch (Exception ex) {
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log.error(ex.getMessage() + ex.getStackTrace() + "\n");
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}
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}
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/**
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* 处理 普通数据项
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*
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* @param item
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*/
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private void handleFormField(FileItem item) {
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// 获取 普通数据项中的 name值
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String fieldName = item.getFieldName();
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// 获取 普通数据项中的 value值
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String value = "";
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try {
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// 以 utf-8的编码格式来解析 value值
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value = item.getString("utf-8");
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} catch (Exception ex) {
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log.error(ex.getMessage() + ex.getStackTrace() + "\n");
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}
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// 输出到控制台
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System.out.println("fieldName:" + fieldName + "--value:" + value);
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}
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/**
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* 处理 文件数据项
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*
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* @param item
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*/
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private void handleFileField(FileItem item, HttpServletRequest req) {
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// 获取 文件数据项中的 文件名
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String fileName = item.getName();
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// 判断 此文件的文件名是否合法
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if (fileName == null || "".equals(fileName)) {
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return;
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}
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// 控制只能上传图片
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String img = "image";
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if (!item.getContentType().startsWith(img)) {
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return;
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}
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// 将文件信息输出到控制台:文件名+文件大小
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System.out.println("fileName:" + fileName);
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System.out.println("fileSize:" + item.getSize());
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// 获取 当前项目下的 /files 目录的绝对位置
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ServletContext ctx = req.getSession().getServletContext();
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String path = ctx.getRealPath("/files");
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// 创建 file对象
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File file = new File(path);
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if (!file.exists()) {
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// 创建目录
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file.mkdir();
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}
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// 将文件保存到服务器上（UUID是通用唯一标识码）
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try {
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item.write(new File(file.toString(), UUID.randomUUID() + "_" + fileName));
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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