前言：
现在兄弟们对“jquery获取fileupload”大体比较注重，同学们都想要学习一些“jquery获取fileupload”的相关内容。那么小编同时在网络上汇集了一些关于“jquery获取fileupload””的相关内容，希望我们能喜欢，你们一起来了解一下吧！Web文件上传
RFC1867协议：
RFC1867主要是在HTTP协议的基础上为INPUT标签增加了file属性，同时限定了Form的method必须为POST，ENCTYPE必须为multipart/form-data。
表单上传协议：
POST /web/upload.html HTTP/1.1header-name: header-valueUser-Agent: MyBrowserHost: 127.0.0.1:9090Proxy-Connection: Keep-AliveContent-Length: 5989Content-Type: multipart/form-data; boundary=----------------314159265358979323846 ------------------314159265358979323846Content-Disposition: form-data; name="file1"; filename="logo.gif"Content-Type: application/octet-stream; charset=ISO-8859-1Content-Transfer-Encoding: binary --二进制内容（略） ------------------314159265358979323846Content-Disposition: form-data; name="file2"; filename="logo.png"Content-Type: application/octet-stream; charset=ISO-8859-1Content-Transfer-Encoding: binary --二进制内容（略） ------------------314159265358979323846--服务器端Servlet + Apache FileUpload实现
pom.xml
<!-- 上传文件 --><dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.3</version></dependency><dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.4</version></dependency>
Servlet类
package com.what21.servlet.upload;import com.fasterxml.jackson.databind.ObjectMapper;import com.what21.servlet.upload.helper.HttpServletUploadHelper;import org.apache.commons.fileupload.FileItem;import org.apache.commons.fileupload.FileUploadException;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.IOException;import java.io.PrintWriter;import java.util.HashMap;import java.util.List;import java.util.Map;@WebServlet("/upload/form")public class FormUploadServlet extends HttpServlet { @Override protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Map<String, Object> dataMap = new HashMap<>(); dataMap.put("code", "ok"); // ===================================================================================// // ===== 处理&保存文件 // ===================================================================================// String tmpDir = "D:/Temp/Upload/tmp"; // 临时目录 String domain = ""; // 域 String function = "head"; // 功能 String storagePath = "D:/Temp/Upload/"; // 上传目录 List<HttpServletUploadHelper.Entity> entityList = null; try { List<FileItem> fileItemList = HttpServletUploadHelper.toFileItems(request, tmpDir, "UTF-8"); entityList = HttpServletUploadHelper.parseToEntitys(fileItemList, storagePath, domain, function); dataMap.put("data", entityList); } catch (Exception e) { e.printStackTrace(); dataMap.put("code", "error"); dataMap.put("msg", e.getMessage()); } // ===================================================================================// // ===== 返回结果 // ===================================================================================// ObjectMapper mapper = new ObjectMapper(); String json = mapper.writeValueAsString(dataMap); response.setContentType("text/json;charset=UTF-8"); response.setCharacterEncoding("UTF-8"); PrintWriter writer = response.getWriter(); writer.print(json); writer.flush(); }}工具类
package com.what21.servlet.upload.helper;import com.relops.snowflake.Snowflake;import lombok.Data;import org.apache.commons.fileupload.FileItem;import org.apache.commons.fileupload.FileUploadException;import org.apache.commons.fileupload.disk.DiskFileItemFactory;import org.apache.commons.fileupload.servlet.FileCleanerCleanup;import org.apache.commons.fileupload.servlet.ServletFileUpload;import org.apache.commons.io.FileCleaningTracker;import org.apache.commons.io.FileUtils;import org.apache.commons.io.FilenameUtils;import org.apache.commons.lang3.StringUtils;import javax.servlet.http.HttpServletRequest;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;import java.util.List;import java.util.Random;public final class HttpServletUploadHelper { // ===================================================================================// // ===== header中操作 // ===================================================================================// /** * 从header中获取值 * * @param request * @param name * @param defaultValue * @return */ public static String getHeaderValue(HttpServletRequest request, String name, String defaultValue) { String value = request.getHeader(name); if (StringUtils.isNotEmpty(value)) { return value; } return defaultValue; } // ===================================================================================// // ===== 文件操作 // ===================================================================================// /** * 获取文件后缀 * * @param name * @return */ public static String getFileSuffix(String name) { if (StringUtils.isNotEmpty(name)) { if (name.contains(".")) { return name.split("\\.")[1]; } } return ""; } /** * 交换保存 * * @param inputStream * @param filename * @throws IOException */ public static File exchangeSave(InputStream inputStream, String filename) throws IOException { File saveFile = new File(filename); if (!saveFile.getParentFile().exists()) { saveFile.getParentFile().mkdirs(); } FileOutputStream output = new FileOutputStream(filename); int r = -1; byte[] bytes = new byte[512]; while ((r = inputStream.read(bytes)) != -1) { output.write(bytes, 0, r); } output.flush(); output.close(); return saveFile; } // ===================================================================================// // ===== 实体操作 // ===================================================================================// /** * 从header中取参数 * * @param request * @param domain * @param function * @return * @throws IOException */ public static Entity createEntityWithHeader(HttpServletRequest request, String domain, String function) throws IOException { Entity entity = new Entity(); entity.setId(getSnowflakeId()); entity.setModular(HttpServletUploadHelper.getHeaderValue(request, "modular", "communal")); entity.setModel(HttpServletUploadHelper.getHeaderValue(request, "model", "common")); entity.setName(HttpServletUploadHelper.getHeaderValue(request, "name", getRandomString(30))); entity.setType(HttpServletUploadHelper.getHeaderValue(request, "type", "file")); entity.setSuffix(HttpServletUploadHelper.getFileSuffix(entity.getName())); entity.setFile(entity.getId() + "." + entity.getSuffix()); String accessAddress = "/" + entity.getModular() + "/" + entity.getModular(); String storageAddress = "/" + entity.getModular() + "/" + entity.getModular(); if (StringUtils.isNotEmpty(domain)) { accessAddress = domain + "/" + accessAddress; storageAddress = domain + "/" + storageAddress; } if (StringUtils.isNotEmpty(function)) { accessAddress = accessAddress + "/" + function; storageAddress = storageAddress + "/" + function; } accessAddress = accessAddress + "/" + entity.getId(); storageAddress = storageAddress + "/" + entity.getId(); entity.setAccessAddress(accessAddress); entity.setStorageAddress(storageAddress); entity.setStatus(0); return entity; } // ===================================================================================// // ===== 实体类 // ===================================================================================// @Data public static class Entity { // 主键ID private Long id; // 系统一级模块 private String modular; // 系统二级模块 private String model; // 静态资源名称 private String name; // 静态资源类型 private String type; // 静态资源文件 private String file; // 文件大小 private Long size; // 静态资源后缀 private String suffix; // 静态资源状态 private Integer status; // 资源存储地址 private String storageAddress; // 资源访问地址 private String accessAddress; } // ===================================================================================// // ===== 工具操作 // ===================================================================================// /** * @return */ public static Long getSnowflakeId() { return getSnowflakeId(1); } /** * @param node * @return */ public static Long getSnowflakeId(int node) { Snowflake snowflake = new Snowflake(node); return snowflake.next(); } /** * 获取随机字符串 * * @param length * @return */ public static String getRandomString(int length) { String str = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; Random random = new Random(); StringBuffer sb = new StringBuffer(); for (int i = 0; i < length; i++) { int number = random.nextInt(62); sb.append(str.charAt(number)); } return sb.toString(); } // ===================================================================================// // ===== 表单上传 // ===================================================================================// /** * @param request * @param tmpDir * @param encode * @return * @throws FileUploadException */ public static List<FileItem> toFileItems(HttpServletRequest request, String tmpDir, String encode) throws FileUploadException { DiskFileItemFactory factory = new DiskFileItemFactory(); // 重新设置临时文件保存目录 factory.setRepository(new File(tmpDir)); // 设置文件清除追踪器，文件上传过程中产生的临时文件 FileCleaningTracker fileCleaningTracker = FileCleanerCleanup.getFileCleaningTracker(request.getServletContext()); factory.setFileCleaningTracker(fileCleaningTracker); ServletFileUpload upload = new ServletFileUpload(factory); // 设置字符编码UTF-8 upload.setHeaderEncoding(encode); // 解析请求数据包 return upload.parseRequest(request); } /** * @param fileItemList * @param storagePath * @param domain * @param function * @return * @throws IOException */ public static List<Entity> parseToEntitys(List<FileItem> fileItemList, String storagePath, String domain, String function) throws IOException { List<Entity> entityList = new ArrayList<>(); // ===================================================================// // =====模块化参数 // ===================================================================// String modular = "communal"; String model = "common"; for (FileItem fileItem : fileItemList) { String fieldName = fileItem.getFieldName(); if (fileItem.isFormField()) { if ("modular".equals(fieldName)) { modular = fileItem.getString(); } else if ("model".equals(fieldName)) { model = fileItem.getString(); } } } // ===================================================================// // =====地址处理 // ===================================================================// String accessAddress = "/" + modular + "/" + model; String storageAddress = "/" + modular + "/" + model; if (StringUtils.isNotEmpty(domain)) { accessAddress = domain + "/" + accessAddress; storageAddress = domain + "/" + storageAddress; } if (StringUtils.isNotEmpty(function)) { accessAddress = accessAddress + "/" + function; storageAddress = storageAddress + "/" + function; } // ===================================================================// // =====保存并构建对象 // ===================================================================// for (FileItem fileItem : fileItemList) { String name = fileItem.getName(); if (!fileItem.isFormField() && fileItem.getSize() > 0) { // 文件后缀 String fileExtension = FilenameUtils.getExtension(name); // 文件名 String fileName = FilenameUtils.getName(name); Entity entity = new Entity(); entity.setId(getSnowflakeId()); entity.setModular(modular); entity.setModel(model); entity.setName(fileName); entity.setType(fileItem.getContentType()); entity.setSuffix(fileExtension); entity.setFile(entity.getId() + "." + fileExtension); entity.setSize(fileItem.getSize()); entity.setStatus(0); entity.setAccessAddress(accessAddress + "/" + entity.getId()); entity.setStorageAddress(storageAddress + "/" + entity.getId()); // 保存文件 File saveFile = new File(storagePath + entity.getStorageAddress()); if (!saveFile.getParentFile().exists()) { saveFile.getParentFile().mkdirs(); } FileUtils.copyInputStreamToFile(fileItem.getInputStream(), saveFile); entityList.add(entity); } } return entityList; } // ===================================================================================// // ===== The end // ===================================================================================//}上传文件客户端测试Postman测试
结果
{ "code": "ok", "data": [ { "id": 6905426757113876480, "modular": "modular01", "model": "model01", "name": "001.jpg", "type": "image/jpeg", "file": "6905426757113876480.jpg", "size": 4473, "suffix": "jpg", "status": 0, "storageAddress": "/modular01/model01/head/6905426757113876480", "accessAddress": "/modular01/model01/head/6905426757113876480" }, { "id": 6905426757130653696, "modular": "modular01", "model": "model01", "name": "212.txt", "type": "text/plain", "file": "6905426757130653696.txt", "size": 1003, "suffix": "txt", "status": 0, "storageAddress": "/modular01/model01/head/6905426757130653696", "accessAddress": "/modular01/model01/head/6905426757130653696" } ]}表单测试页面
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Form表单上传</title> <script src=";></script> <link href="; rel="stylesheet"></head><body> <div class="container " style="width:600px;"> <span> <h1>Form表单上传</h1> </span> <form method="post" action="; enctype="multipart/form-data"> <input type="hidden" name="model" value="object" /> <div class="form-group"> <label for="address">上传地址:</label> <input id="address" name="address" class="form-control" value="; /> </div> <div class="form-group"> <label for="modular">一级模块:</label> <input id="modular" name="modular" class="form-control" value="modular"/> </div> <div class="form-group"> <label for="model">二级模块:</label> <input id="model" name="model" class="form-control" value="model" /> </div> <div class="form-group"> <label for="file1">上传文件1:</label> <input id="file1" type="file" name="file1" value="" class="form-control" /> </div> <div class="form-group"> <label for="file2">上传文件2:</label> <input id="file2" type="file" name="file2" value="" class="form-control" /> </div> <div class="form-group"> <label for="desc">描述:</label> <textarea id="desc" name="desc" class="form-control" style="min-height: 200px;"></textarea> </div> <div class="form-group form-check"> <label class="form-check-label"> <input class="form-check-input" type="checkbox">记住我 </label> </div> <button type="reset" class="btn btn-secondary">取消</button> <button type="submit" class="btn btn-danger">提交</button> </form> </div></body></html>
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