JAVAWEB学习制作自己的小说管理网站-day03

主要实现了文件上传的uploadServlet，以及uploadDownload.jsp

上传文件功能实现的代码：

1.用apache的commons-fileupload组件实现

@Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws ServletException, IOException {
        //判断类型
        boolean isMultipart = ServletFileUpload.isMultipartContent(req);

        if(isMultipart){
            FileItemFactory factory = new DiskFileItemFactory();
            ServletFileUpload upload = new ServletFileUpload(factory);

            try {
                List items = upload.parseRequest(req);
                Iterator iter = items.iterator();
                while(iter.hasNext()){
                    FileItem item = (FileItem)iter.next();
                    if(item.isFormField()){
                        processFormField(item);
                        req.getRequestDispatcher("/main.jsp").forward(req, resp);
                    }else{
                        if(processUploadFile(item,req)){
                            req.getSession(true).setAttribute("fileUpload","success fileUpload");
                        }else{
                            req.getSession(true).setAttribute("fileUpload","failure fileUpload");
                        }
                    }
                }
                if(req.getSession(true).getAttribute("fileUpload").equals("success fileUpload")){
                    resp.sendRedirect(req.getContextPath()+"/uploadDownload.jsp");
                }else{
                    resp.sendRedirect(req.getContextPath()+"/uploadDownload.jsp");
                }
            } catch (FileUploadException e) {
                e.printStackTrace();
            }
        }
    }

    public boolean processUploadFile(FileItem item, HttpServletRequest req){
        if(!item.isFormField()){
            String fileName = item.getName();
            fileName = fileName.substring(fileName.lastIndexOf("\\")+1);
            System.out.println("fileName:"+fileName);
            if(fileName.equals("")||fileName.equals(null)){
                System.out.println("match");
                return false;
            }
            String root = getServletContext().getRealPath("/");
            File path = new File(root + "/WEB-INF/uploads/" + req.getSession(true).getAttribute("username"));
            if(!path.exists()){
                path.mkdirs();
            }

            File uploadFile = new File(path+"/"+fileName);
            System.out.println(uploadFile);

            try {
                item.write(uploadFile);
            } catch (Exception e) {
                e.printStackTrace();
            }

            FileOutputStream uploadZipFileOutputStream = null;
            try {
                uploadZipFileOutputStream = new FileOutputStream(path+"/"+fileName+".zip");
            } catch (FileNotFoundException e1) {
                e1.printStackTrace();
            }
            ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(uploadZipFileOutputStream));

            byte[] data = new byte[1000];
            try {
                BufferedInputStream in = new BufferedInputStream(new FileInputStream(uploadFile));
                int count;
                try {
                    out.putNextEntry(new ZipEntry(fileName+".zip"));
                    while((count = in.read(data,0,1000)) != -1){
                        out.write(data,0,count);
                    }
                    in.close();
                    out.flush();
                    out.close();
                    System.out.println("Your file is zipped!");
                } catch (IOException e) {
                    e.printStackTrace();
                }
            } catch (FileNotFoundException e1) {
                e1.printStackTrace();
            }

            uploadFile.delete();
        }
        return true;
    }

    public void processFormField(FileItem item){
        if(item.isFormField()){
            String name = item.getFieldName();
            String value = item.getString();
            if(name.equals("storyName")){

            }else if(name.equals("writer")){

            }else if(name.equals("description")){

            }
        }
    }

 

上传文件实现的页面：

 1上传的页面包括 label+file+input，可以上传多个文件，点击按钮，可以动态添加一栏上传文件的标记

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>upload and download file page</title>

    <script type="text/javascript">
        var i = 2;
        function addFileUploadTag()
        {
            var br = document.createElement("br");
            document.getElementById("file"+(i-1)).appendChild(br);
            var dynDiv = document.createElement("div");
            dynDiv.id = "file"+i;
            var label = document.createElement("label");
            label.innerHTML = "Story"+(i++)+":";
            var file = document.createElement("input");
            file.type = "file";
            file.name = "file"+(i-1);
            file.size = "5";
            var formCom = document.getElementById("form01");
            dynDiv.style.height = "20px";
            dynDiv.style.width = "300px";
            dynDiv.style.display = "inline";

            var labelStoryName = document.createElement("label");
            labelStoryName.innerHTML = "storyName:";
            var storyName = document.createElement("input");
            storyName.type="text";
            storyName.name = "storyName";

            var labelWriter = document.createElement("label");
            labelWriter.innerHTML = "writer:";
            var writer = document.createElement("input");
            writer.type="text";
            writer.name="writer";

            var labelDescription = document.createElement("label");
            labelDescription.innerHTML = "description:";
            var description = document.createElement("textarea");
            description.name = "description";

            var labelCover = document.createElement("cover");
            labelCover.innerHTML = "cover:";
            var cover = document.createElement("input");
            cover.type = "file";
            cover.name = "cover" + (i-1);
            cover.size = "5";


            dynDiv.appendChild(label);
            dynDiv.appendChild(file);
            dynDiv.appendChild(labelStoryName);
            dynDiv.appendChild(storyName);
            dynDiv.appendChild(labelWriter);
            dynDiv.appendChild(writer);
            dynDiv.appendChild(labelDescription);
            dynDiv.appendChild(description);
            document.getElementById("file"+(i-2)).appendChild(dynDiv);
        }

    </script>

</head>
<body>
    <h1>upload list:</h1>
    <h2 style="color:red;">Attention:all upload files will be stored in zip format in server.</h2>
    <hr>
    <form id="form01" method="post" action="upload" ENCTYPE="multipart/form-data">
        <div id="file1">
            Story1:<input id="file111" type="file" name="story1" size="5"/>
            storyName:<input type="text" name="storyName"/>
            writer:<input type="text" name="writer"/>
            description:<textarea rows="" cols="" name="textArea"></textarea>
        </div>

        <div id = "button">
            <input type="button" value="addAnotherFile" onclick="addFileUploadTag();"/>
            <input type="submit" value="clickToUploadAll"/>
        </div>

    </form>

    <h1>fileUploadResult:${sessionScope.fileUpload}</h1>

    <hr>

    <h1>download list</h1>


</body>
</html>

需要实现的功能：把图片预览，导入上来，把上传的文件保存到数据库中，路径保存到表中，实现注册功能。

本文出自 “AhahaGe” 博客，谢绝转载！