文件上传之Apache commons fileupload使用

后台servlet代码：

        File file1 = null,file2=null;

        String description1 = null,description2 = null;

        response.setCharacterEncoding("UTF-8");

        request.setCharacterEncoding("UTF-8");

        response.setContentType("text/html");

        PrintWriter out = response.getWriter();

       

        DiskFileUpload diskFileUpload = new DiskFileUpload();

        try{

            List<FileItem> list = diskFileUpload.parseRequest(request);

           

            out.println("下面开始遍历所有的FileItem<br/><br/>");

           

            for(FileItem fileItem : list){

                if(fileItem.isFormField()){

                    if("description1".equals(fileItem.getFieldName())){

                        out.println("遍历到description1 ... 现在description1是空-----批注1---<br/><br/>");

                        description1 = new String(fileItem.getString().getBytes(),"UTF-8");

                    }

                    if("description2".equals(fileItem.getFieldName())){

                        out.println("遍历到description2 ... 现在description2是空-----批注2---<br/><br/>");

                        description2 = new String(fileItem.getString().getBytes(),"UTF-8");

                    }

                } else{

                    if("file1".equals(fileItem.getFieldName())){

                        File remoteFile = new File(new String(fileItem.getName().getBytes(),"UTF-8"));

                        out.println("已经检测到用户上传了文件1，并且已经遍历到file1...<br/>");

                        out.println("客户端文件位置："+remoteFile.getAbsolutePath()+"<br/><br/>");

                        /*将客户端路径放到session中*/

                        HttpSession session = request.getSession();

                        session.setAttribute("clientAddress", remoteFile.getAbsolutePath());

                       

                        file1 = new File(this.getServletContext().getRealPath("attachment"),remoteFile.getName());

                        file1.getParentFile().mkdirs();

                        file1.createNewFile();

                       

                        InputStream ins = fileItem.getInputStream();

                        OutputStream ous = new FileOutputStream(file1);

                       

                        try{

];

;

)

,len);

                            out.println("已经保存文件到绝对路径——"+file1.getAbsolutePath()+"<br/><br/>");

                            /*将绝对路径放到session中*/

                            session.setAttribute("JueDuiAddress", file1.getAbsolutePath());

                            out.println("<img src="+file1.getAbsolutePath() +" alt='商务小人'/><br/><br/>");

                        }finally{

                            ous.close();

                            ins.close();

                        }

                    }

                    if("file2".equals(fileItem.getFieldName())){

                        File remoteFile = new File(new String(fileItem.getName().getBytes(),"UTF-8"));

                        out.println("已经检测到用户上传了文件2，并且已经遍历到file2...<br/><br/>");

                        out.println("客户端文件位置："+remoteFile.getAbsolutePath()+"<br/><br/>");

                       

                        HttpSession session = request.getSession();

                        session.setAttribute("clientAddress", remoteFile.getAbsolutePath());

                       

                        file2 = new File(this.getServletContext().getRealPath("attachment"),remoteFile.getName());

                        file2.getParentFile().mkdirs();

                        file2.createNewFile();

                       

                        InputStream ins = fileItem.getInputStream();

                        OutputStream ous = new FileOutputStream(file2);

                       

                        try{

];

;

)

,len);

                            out.println("已经保存文件到绝对路径——"+file2.getAbsolutePath()+"<br/><br/>");

                            /*将绝对路径放到session中*/

                            session.setAttribute("JueDuiAddress", file2.getAbsolutePath()); 

                        }finally{

                            ous.close();

                            ins.close();

                        }

                    }

                }

                out.println("Request 解析完毕<br/><br/>");

            }

        }

前台jsp代码： 

<form action="/login/UploadSer" method="post" enctype="multipart/form-data">

        <div align="center">

            <fieldset style="width:80%">

                <legend>上传文件</legend><br/>

                    <div align="left">上传文件1</div>

                    <div align="left">

                        <input type="file" name="file1"/>

                    </div>

                    <div align="left">上传文件2</div>

                    <div align="left">

                        <input type="file" name="file2"/>

                    </div>

                    <div>

                        <div align='left'>上传文件说明1</div>

                        <div align='left'>

                             <input type="text" name="description1"/>

                        </div>

                    </div>

                    <div>

                        <div align='left'>上传文件说明2</div>

                        <div align='left'>

                             <input type="text" name="description2"/>

                        </div>

                    </div>

                    <div>

                        <div align='left'>

                            <input type='submit' value="上传文件"/>

                        </div>

                    </div>

            </fieldset>

        </div>

    </form>

 

运行结果截图：