$.ajaxFileUpload 文件上传

$.ajaxFileUpload用于文件的上传.

图片上传：

	//上传图片
	$("#buttonUpload").click(function(){	
		$.ajaxFileUpload({  
		url:basepath + 'ImageUpload',  //调用方法
	    secureuri:false,
	    fileElementId:'actImageUp', //界面id 
	    dataType: 'json',  
	    success: function (data, status) {     
	    	if (data.state == "SUCCESS") {
	    		// 上传图片成功    		
	    		//$("#noticePic").val(data.src);
	    		$("#noticePic").val(data.imageName);
	    		
	    	} else {
	    		$('#result').html('上传图片失败, 失败原因:'+data.state); 
	    	}
	    },  
	    error: function (data, status, e) {
	        $('#result').html('上传图片失败');  
	    }  
	});
	});

 jsp：

   加入：

     <script type="text/javascript" src="<%=basePath%>/PUBLISH/scripts/jquery.ajaxfileupload.js"></script>

<div id="result" style="FONT:12px 宋体"></div>
					<input type="file" name="actImageUp" id="actImageUp" style="width: 63px;"/>
					<input name=noticePic id="noticePic"  readonly="readonly" style="width:133px;"  ></input>

 

servelt：

package com.fjxhx.business.notice.servlet;

import java.io.BufferedInputStream;  
import java.io.BufferedOutputStream;  
import java.io.File;  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.util.Date;  
import java.util.regex.Matcher;  
import java.util.regex.Pattern;  
  
import javax.servlet.ServletException;  
import javax.servlet.http.HttpServlet;  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletResponse;  
  
import org.apache.commons.fileupload.FileItemIterator;  
import org.apache.commons.fileupload.FileItemStream;  
import org.apache.commons.fileupload.disk.DiskFileItemFactory;  
import org.apache.commons.fileupload.servlet.ServletFileUpload;  
import org.apache.commons.fileupload.util.Streams; 

public class ImageUpload extends HttpServlet {

	public ImageUpload() {
		super();
	}

	public void destroy() {
		super.destroy();
	}

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setContentType("text/html");
		response.setCharacterEncoding("UTF-8");
		String realDir = request.getSession().getServletContext().getRealPath(
				"");
		String contextpath = request.getContextPath();
		String basePath = request.getScheme() + "://" + request.getServerName()
				+ ":" + request.getServerPort() + contextpath + "/";

		try {
			String filePath = "../uploadfiles";
			String realPath = realDir + "/" + filePath;
			System.out.println(realPath);
			//判断路径是否存在，不存在则创建  
			File dir = new File(realPath);
			if (!dir.isDirectory())
				dir.mkdir();

			if (ServletFileUpload.isMultipartContent(request)) {

				DiskFileItemFactory dff = new DiskFileItemFactory();
				dff.setRepository(dir);
				dff.setSizeThreshold(1024000);
				ServletFileUpload sfu = new ServletFileUpload(dff);
				FileItemIterator fii = null;
				fii = sfu.getItemIterator(request);
				String title = ""; //图片标题  
				String url = ""; //图片地址  
				String fileName = "";
				String state = "SUCCESS";
				String realFileName = "";
				while (fii.hasNext()) {
					FileItemStream fis = fii.next();

					try {
						if (!fis.isFormField() && fis.getName().length() > 0) {
							fileName = fis.getName();
							Pattern reg = Pattern
									.compile("[.]jpg|png|jpeg|gif$");
							Matcher matcher = reg.matcher(fileName);
							if (!matcher.find()) {
								state = "请上传：jpg/png/jpeg/gif等类型图片！";
								break;
							}
							realFileName = new Date().getTime()
									+ fileName.substring(fileName
											.lastIndexOf("."), fileName
											.length());
							url = realPath + "/" + realFileName;

							BufferedInputStream in = new BufferedInputStream(
									fis.openStream());//获得文件输入流  
							FileOutputStream a = new FileOutputStream(new File(
									url));
							BufferedOutputStream output = new BufferedOutputStream(
									a);
							Streams.copy(in, output, true);//开始把文件写到你指定的上传文件夹  
						} else {
							String fname = fis.getFieldName();

							if (fname.indexOf("pictitle") != -1) {
								BufferedInputStream in = new BufferedInputStream(
										fis.openStream());
								byte c[] = new byte[10];
								int n = 0;
								while ((n = in.read(c)) != -1) {
									title = new String(c, 0, n);
									break;
								}
							}
						}

					} catch (Exception e) {
						e.printStackTrace();
					}
				}
				response.setStatus(200);
				String retxt = "{imageName:'"+realFileName+"',src:'" + basePath + filePath + "/"
						+ realFileName + "', state:'"+state+"'}";
				
				response.getWriter().print(retxt);
			}
		} catch (Exception ee) {
			ee.printStackTrace();
		}

	}

	public void init() throws ServletException {
		// Put your code here  
	}
}

 导入js文件：