package com.lf.server.service.data;
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import com.lf.server.entity.ctrl.FileInfo;
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import com.lf.server.entity.data.MetaFileEntity;
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import com.lf.server.entity.sys.UserEntity;
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import com.lf.server.helper.FileHelper;
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import com.lf.server.helper.PathHelper;
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import com.lf.server.helper.StringHelper;
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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 org.springframework.web.multipart.support.StandardMultipartHttpServletRequest;
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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.lang.reflect.Field;
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import java.sql.Timestamp;
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import java.util.*;
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/**
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* 数据上传服务类
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* @author WWW
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*/
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@Service
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public class UploaderService {
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@Autowired
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PathHelper pathHelper;
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private final static Log log = LogFactory.getLog(UploaderService.class);
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/**
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* 上传文件
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*/
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public <T> List<MetaFileEntity> uploadData(T t, UserEntity ue, HttpServletRequest request, HttpServletResponse res) throws Exception {
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StandardMultipartHttpServletRequest req = (StandardMultipartHttpServletRequest) request;
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req.setCharacterEncoding("utf-8");
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res.setContentType("application/json;charset=utf-8");
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setEntity(t, req);
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List<MetaFileEntity> list = getFiles(req);
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return list;
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}
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/**
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* 设置实体类
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* class<T> clazz
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* T t = clazz.newInstance();
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*/
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private <T> void setEntity(T t, StandardMultipartHttpServletRequest req) {
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Enumeration<String> enumeration = req.getParameterNames();
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while (enumeration.hasMoreElements()) {
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String key = enumeration.nextElement();
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try {
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Field field = t.getClass().getDeclaredField(key);
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if (field != null) {
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field.setAccessible(true);
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String value = req.getParameter(key);
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switch (field.getType().toString()) {
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case "long":
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field.set(t, Long.valueOf(value));
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break;
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case "int":
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field.set(t, Integer.valueOf(value));
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break;
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case "class java.sql.Timestamp":
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field.set(t, Timestamp.valueOf(value));
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break;
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//case "class java.lang.String":
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default:
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field.set(t, value);
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break;
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}
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}
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} catch (Exception ex) {
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log.error(ex.getStackTrace());
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}
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}
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}
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/**
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* 获取文件
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*/
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private List<MetaFileEntity> getFiles(StandardMultipartHttpServletRequest req) throws Exception {
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List<MetaFileEntity> list = new ArrayList<MetaFileEntity>();
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String path = pathHelper.getTempPath();
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Iterator<String> iterator = req.getFileNames();
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while (iterator.hasNext()) {
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MultipartFile file = req.getFile(iterator.next());
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if (StringHelper.isEmpty(file.getOriginalFilename())) {
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continue;
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}
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double sizes = FileHelper.sizeToMb(file.getSize());
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MetaFileEntity mf = new MetaFileEntity();
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mf.setName(file.getOriginalFilename());
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mf.setSizes(sizes);
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mf.setPath(path + File.separator + mf.getName());
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file.transferTo(new File(mf.getPath()));
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mf.setGuid(FileHelper.getFileMd5(mf.getPath()));
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list.add(mf);
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}
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return list;
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}
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public Object fileUpload(HttpServletRequest req, HttpServletResponse res) throws Exception {
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List<FileItem> items = getFileItem(req, res);
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return copeFileItems(items, req);
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}
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/**
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* 获取文件项
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*/
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private List<FileItem> getFileItem(HttpServletRequest req, HttpServletResponse res) throws Exception {
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// 处理中文乱码问题
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req.setCharacterEncoding("utf-8");
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// text/html;charset=utf-8
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res.setContentType("application/json;charset=utf-8");
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// 检查请求是/否为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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// 设置编码方式
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sfu.setHeaderEncoding("utf-8");
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factory.setSizeThreshold(4096);
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// 获取表单中的所有数据信息
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List<FileItem> list = sfu.parseRequest(ctx);
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return list;
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}
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/**
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* 处理解析内容：处理普通表单域和文件表单域
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*/
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private Object copeFileItems(List<FileItem> items, HttpServletRequest req) throws Exception {
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Map<String, String> map = new HashMap<String, String>(3);
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List<FileInfo> list = new ArrayList<FileInfo>();
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String path = pathHelper.getTempPath();
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for (FileItem item : items) {
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if (item.isFormField()) {
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String key = item.getFieldName();
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String value = item.getString("utf-8");
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map.put(key, value);
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continue;
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}
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FileInfo fi = copeFile(item, path, req);
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if (fi != null) {
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list.add(fi);
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}
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}
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return map;
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}
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/**
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* 处理文件
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*/
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private FileInfo copeFile(FileItem item, String path, HttpServletRequest req) {
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try {
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// 获取文件名，判断是否合法
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FileInfo fi = new FileInfo(item.getName());
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if (StringHelper.isEmpty(fi.getFileName())) {
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return null;
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}
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fi.setSize(item.getSize());
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fi.setPath(path + File.separator + fi.getFileName());
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item.write(new File(fi.getPath()));
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return fi;
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} catch (Exception ex) {
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log.error(ex.getStackTrace());
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return null;
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}
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}
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/**
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* 获取参数
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* Enumeration<String> headers = req.getHeaderNames();
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* Enumeration<String> attributes = req.getAttributeNames();
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*/
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private Map<String, String> getParams(StandardMultipartHttpServletRequest req) {
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Map<String, String> map = new HashMap<String, String>(3);
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Enumeration<String> enumeration = req.getParameterNames();
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while (enumeration.hasMoreElements()) {
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String key = enumeration.nextElement();
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String value = req.getParameter(key);
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map.put(key, value);
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}
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return map;
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}
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}
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