ajax 文件上传，ajax

ajax 文件上传，ajax

啥也不说了，直接上代码！

<input type="file" id="file" name="myfile" onclick="clearProgressInfo()"/>

<span id="progressInfo" style="display:none;">

<progress id="progressBar" value="0" max="100"></progress>

<span id="percentage"></span>

</span><br/>

<input type="button" onclick="UpladFile()" value="上传" />

js代码

function UpladFile() {

	var fileObj = document.getElementById("file").files[0]; // js 获取文件对象

	var FileController = "/file/saveFile.do"; // 接收上传文件的后台地址

	// FormData 对象

	var form = new FormData();

	form.append("author", "hooyes"); // 可以增加表单数据

	form.append("file", fileObj); // 文件对象

	// XMLHttpRequest 对象

	var xhr = new XMLHttpRequest();

	xhr.open("post", FileController, true);

	xhr.onload = function() {

		// alert("上传完成!");

	};

	document.getElementById('progressInfo').style.display = "";

	xhr.upload.addEventListener("progress", progressFunction, false);

	xhr.send(form);

}

function clearProgressInfo()

{

	document.getElementById('progressInfo').style.display='none';

	document.getElementById("progressBar").value = 0;

	document.getElementById("percentage").innerHTML = "";

}

function progressFunction(evt) {

	var progressBar = document.getElementById("progressBar");

	var percentageDiv = document.getElementById("percentage");

	if (evt.lengthComputable) {

		progressBar.max = evt.total;

		progressBar.value = evt.loaded;

		percentageDiv.innerHTML = Math.round(evt.loaded / evt.total * 100) + "%";

	}

}

java后台处理：

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.util.Streams;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.multipart.MultipartFile;

import org.springframework.web.multipart.MultipartHttpServletRequest;

import org.springframework.web.multipart.MultipartResolver;

import org.springframework.web.multipart.commons.CommonsMultipartResolver;

import org.springframework.web.servlet.mvc.multiaction.MultiActionController;

import com.okcoin.util.Logs;

@Controller

@RequestMapping(value="/file/*.do")

public class FileController extends MultiActionController{

	public String saveFile(HttpServletRequest request,HttpServletResponse response) throws IOException

	{

		MultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext());

		MultipartHttpServletRequest multipartRequest = null;

		try {

			multipartRequest = resolver.resolveMultipart(request);

		} catch (Exception e) {

			Logs.geterrorLogger().error("AdminAccountController submitVerifyFile 非常的请求");

		}

		//接收文件

		MultipartFile documentFile = multipartRequest.getFile("file");

		//获取文件名

		String documentFileName=documentFile.getOriginalFilename();

		System.out.println("FileName:" + documentFileName);

		BufferedInputStream in = new BufferedInputStream(documentFile.getInputStream());

		BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream("D:\\Users\\" + documentFileName));

		Streams.copy(in, out, true);

		System.out.println("copy finished.");

		return "";

	}

}