<script type="text/javascript">Ext.onReady(function(){ var form = new Ext.form.FormPanel({ labelAlign: 'right', title: '文件上传', labelWidth: 50, frame:true, fileUpload: true, url: 'uploadFile?mark='+"",//fileUploadServlet width: 380, items: [{ xtype: 'textfield', fieldLabel: '文本框', name: 'file', inputType: 'file'//文件类型 }], buttons: [{ text: '上传', method:'post',handler: function() { form.getForm().submit({ success: function(form, action){ if(action.result.info=='1'){Ext.Msg.alert('提示', '上传成功.......'); }}, failure: function(form, action){ if(action.result.info=='4'){Ext.Msg.alert('错误', '无法读取上传的文件,请确认该文件没有被破坏!'); }else if(action.result.info=='0'){Ext.Msg.alert('错误','您上传的文件不存在!请确认路径是否写正确!'); }} }); } }] }); form.render(document.body); }); </script>import javax.servlet.Servlet;import javax.servlet.ServletInputStream;import javax.servlet.http.*;import java.io.*;public class UploadFile extends HttpServlet implements Servlet {public ServletInputStream sis = null;// 输入流private byte[] b = new byte[4096];// 字节流存放数组private byte[] buff = new byte[1024];public void doPost(HttpServletRequest request, HttpServletResponse response) {try {PrintWriter out = response.getWriter();String systemPath = request.getRealPath("/");// 当前项目路径sis = request.getInputStream();int a = 0;int k = 0;String path = "";while ((a = sis.readLine(b, 0, b.length)) != -1) {path = new String(b, 0, a);if ((k = path.indexOf("filename=")) != -1) {path = path.substring(k + 10);k = path.indexOf("/"");path = path.substring(0, k);int c = path.lastIndexOf("//");String fileName = path.substring(c + 1);// 文件名int f = fileName.lastIndexOf(".");String dat = fileName.substring(f + 1);// 扩展名if (!dat.equals("raq") && dat != "raq") {// 如果扩展名字不是raq.不允许上传out.print("{failure:true,info:'5'}");// 5表示扩展名不对return;}File fileReadin = new File(path);// 上传过来的文件if (!fileReadin.exists()) {// 判断文件是否存在out.print("{failure:true,info:'0'}");// 0表示文件不存在return;} else {File fileOutput = new File(systemPath + "reportFiles//"+ fileName);// 输出的文件UploadFile.copyFile(path, systemPath + "reportFiles//"+ fileName, response);// 把上传的文件copy给新建的文件out.print("{success:true,info:'1'}");// 1表示上传成功return;}}}} catch (Exception e) {e.printStackTrace();}}public void doGet(HttpServletRequest request, HttpServletResponse response) {doPost(request, response);}public static boolean copyFile(File filefrom, File fileto, boolean rewrite,HttpServletResponse response) {try {PrintWriter out = response.getWriter();if (!filefrom.canRead()) {out.print("{success:true,info:'4'}");// 4表示无法读取上传文件return false;}FileInputStream fosfrom = new FileInputStream(filefrom);FileOutputStream fosto = new FileOutputStream(fileto);byte bt[] = new byte[1024];int c;while ((c = fosfrom.read(bt)) > 0) {fosto.write(bt, 0, c);}fosfrom.close();fosto.close();return true;} catch (Exception ex) {ex.printStackTrace();return false;}}public static boolean copyFile(String from, String to,HttpServletResponse response) {File filefrom = new File(from);File fileto = new File(to);return copyFile(filefrom, fileto, true, response);}} 不知道杂说.自己看代码吧.
