the request was rejected because no multipart boundary was found

kekewang 2009-05-19 08:13:33

upload.jsp

<%@ page language="java" contentType="text/html; charset=gbk"
pageEncoding="gbk"%>
<!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=gbk">
<title>Insert title here </title>
<script type="text/javascript">
var xmlHttp;
//创建XMLhttpRequest对象
function createXMLHttpRequest() {
if (window.ActiveXObject) {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if (window.XMLHttpRequest) {
xmlHttp = new XMLHttpRequest();
}
}

//生成传递到服务器的参数查询串，参数值由页面表单填写得到
function createQueryString() {
var firstName = document.getElementById("firstName").value;
var queryString = "firstName=" + firstName + "";
return queryString;
}
//点击按钮响应的POST方法主函数
//POST方法把参数值以名=值方式在xmlHttp.send(queryString)中传递,queryString的形式为参数名=值&参数名=值...;
function doRequestUsingPOST() {
createXMLHttpRequest();//第一步：创建XMLHttpRequest对象
var url = "fff";
var queryString = createQueryString();//第二步：定义传递的参数值字符串
xmlHttp.open("POST", url, true);//第三步：建立与服务器的请求
xmlHttp.onreadystatechange = handleStateChange;//第四步：监听状态-->转到监听状态函数
xmlHttp.setRequestHeader("Content-Type","multipart/form-data;");
xmlHttp.send(null);//第五步：发送请求，并且立即返回
}

//监听状态函数
function handleStateChange() {
if(xmlHttp.readyState == 4) {
if(xmlHttp.status == 200) {
parseResults();//-->转到函数parseResults输出从服务器返的值
}
}
}

//在页面显示从服务器传来的结果
function parseResults() {
var responseDiv = document.getElementById("serverResponse");
if(responseDiv.hasChildNodes()) {
responseDiv.removeChild(responseDiv.childNodes[0]);
}
var responseText = document.createTextNode(xmlHttp.responseText);//
responseDiv.appendChild(responseText);
}
</script>
</head>
<body>

<input type="file" size="30" id="firstName" name="test" />
<input name="up" type="button" onclick="doRequestUsingPOST();" value="上传" />
<div id="serverResponse"> </div>

</body>
</html>

UploadFile.java

public class UploadFile extends HttpServlet {

protected void processRequest(HttpServletRequest request,
HttpServletResponse response, String method)
throws ServletException, IOException {

final long MAX_SIZE = 3 * 1024 * 1024;

final String[] allowedExt = new String[] { "jpg","gif" };
response.setContentType("text/html;charset=gbk");

response.setCharacterEncoding("gbk");

DiskFileItemFactory dfif = new DiskFileItemFactory();
dfif.setSizeThreshold(4096);
dfif.setRepository(new File(request.getRealPath("/")
+ "ImagesUploadTemp"));

ServletFileUpload sfu = new ServletFileUpload(dfif);

sfu.setSizeMax(MAX_SIZE);

PrintWriter out = response.getWriter();

List fileList = null;
try {
fileList = sfu.parseRequest(request);
} catch (FileUploadException e) {
if (e instanceof SizeLimitExceededException) {
out.println("请选择小于等于:" + MAX_SIZE + "的文件 <p />");
out.println(" <a href=\"upload.html\" target=\"_top\">返回 </a>");
return;
}
e.printStackTrace();
}

if (fileList == null || fileList.size() == 0) {
out.println("11");
out.println(" <a href=\"upload.html\" target=\"_top\">返回 </a>");
return;
}
Iterator fileItr = fileList.iterator();

while (fileItr.hasNext()) {
FileItem fileItem = null;
String path = null;
long size = 0;

fileItem = (FileItem) fileItr.next();
if (fileItem == null || fileItem.isFormField()) {
continue;
}
path = fileItem.getName();
size = fileItem.getSize();
if ("".equals(path) || size == 0) {
out.println("你选择的文件不正确 ");
out.println(" <a href=\"upload.html\" target=\"_top\">返回 </a>");
return;
}
String t_name = path.substring(path.lastIndexOf("\\") + 1);
String t_ext = t_name.substring(t_name.lastIndexOf(".") + 1);
int allowFlag = 0;
int allowedExtCount = allowedExt.length;
for (; allowFlag < allowedExtCount; allowFlag++) {
if (allowedExt[allowFlag].equals(t_ext))
break;
}
if (allowFlag == allowedExtCount) {
out.println("支撑的文件格式 <p />");
for (allowFlag = 0; allowFlag < allowedExtCount; allowFlag++)
out.println("*." + allowedExt[allowFlag]
+ " ");
out.println(" <p /> <a href=\"upload.html\" target=\"_top\">返回 </a>");
return;
}
long now = System.currentTimeMillis();
String prefix = String.valueOf(now);
String u_name = request.getRealPath("/") + "ImagesUploaded/"
+ prefix + "." + t_ext;
try {

fileItem.write(new File(u_name));
out.println("文件名称: " + prefix + "." + t_ext
+ " 文件大小: " + size + " <p />");
out.println(" <a href=\"upload.html\" target=\"_top\">返回 </a>");
} catch (Exception e) {
e.printStackTrace();
}

}
out.println("123");
out.close();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//Get主函数调用processRequest,完成Get方法的参数接受，返回的过程
processRequest(request, response, "GET");
}
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//POST主函数调用processRequest,完成POST方法的参数接受，返回的过程
processRequest(request, response, "POST");
}
}
报的错误
org.apache.commons.fileupload.FileUploadException: the request was rejected because no multipart boundary was found
at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl. <init>(FileUploadBase.java:814)
at org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:323)
at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:341)
at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:126)
at UploadFile.processRequest(UploadFile.java:47)
at UploadFile.doPost(UploadFile.java:124)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:228)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:216)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:634)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:445)
at java.lang.Thread.run(Unknown Source)

我就是想把他改成 ajax 的不知道怎么改

...全文

6254 6 打赏收藏转发到动态举报

写回复

用AI写文章

6 条回复

切换为时间正序

请发表友善的回复…

发表回复

carrie_tc 2011-11-18

打赏
举报

//POST方法把参数值以名=值方式在xmlHttp.send(queryString)中传递,queryString的形式为参数名=值&参数名=值...;
function doRequestUsingPOST() {
createXMLHttpRequest();//第一步：创建XMLHttpRequest对象
var url = "fff";
var queryString = createQueryString();//第二步：定义传递的参数值字符串
xmlHttp.open("POST", url, true);//第三步：建立与服务器的请求
xmlHttp.onreadystatechange = handleStateChange;//第四步：监听状态-->转到监听状态函数
xmlHttp.setRequestHeader("Content-Type","multipart/form-data;");
xmlHttp.send(null);//第五步：发送请求，并且立即返回
}
请问，上面的代码里头，我看见post方法中，发送请求时，参数为null.您没有传递参数过去，后面怎么获得的？是用form的提交吗？

<s:form action="upload" theme="simple"enctype="multipart/form-data">
这个是您的form头吗？
我的是：<form name="form" action="javascript:dosss();" enctype="multipart/form-data">我直接用表单提交可以实现，但是用这种方法，servlet处理完之后，必须得跳转，只能用ajax.
<script type="text/javascript">
//统计资源访问次数的脚本
//定义XMLHttpRequest对象
var http_request1=false;
function send_request1(url){
http_request1=false;
//开始初始化XMLHttpRequest对象
if(window.XMLHttpRequest){//Mozilla等浏览器初始化XMLHttpRequest过程
http_request1=new XMLHttpRequest();
//有些版本的Mozilla浏览器处理服务器返回的未包含XML mime-type头部信息的内容时会出错.
//因此,要确保返回的内容包含text/xml信息.
if(http_request1.overrideMimeType){
http_request1.overrideMimeType("text/xml");
}
}
else if(window.ActiveXObject){//IE浏览器初始化XMLHttpRequest过程
try{
http_request1=new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e){
try{
http_request1=new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e){}
}
}
//异常,创建对象失败
if(!http_request1){
window.alert("不能创建XMLHttpRequest对象实例!");
return false;
}
//指定响应处理函数
http_request1.onreadystatechange=ps;
//发送HTTP请求信息
http_request1.open("POST",url,true);

http_request1.setRequestHeader("Content-Type","multipart/form-data");
//将参数放到这里，后台servlet可以用request.getParameter()方法取到这些参数
var firstName = document.getElementById("firstName").value;
var queryString = "firstName=" + firstName + "";

http_request1.send(firstName);

}
//处理返回信息函数
function ps() {
if(http_request1.readyState==4){
//判断HTTP状态码
if(http_request1.status==200){
//信息已经成功返回，无动作
}
else {
}
}
}
function dosss(){
send_request1("/m/upload"); //这里的rewriteUrl就是页面上放置的资源经过重写后的链接
}
</script>

servlet跟您的一样，请指教。

fyjava1984 2009-08-01

打赏
举报

建议使用表单提交

老紫竹 2009-08-01

打赏
举报

Ajax 是无法直接处理带附件的POST请求的，需要使用一些第三方的组件或者自己用iframe实现

heavilyarmed 2009-07-31

打赏
举报

[Quote=引用 1 楼 tohmin 的回复:]
<s:form action="upload" theme="simple"enctype="multipart/form-data">
.......
</s:form>
Stuts2中上传文件，form的 enctype 要设成， enctype="multipart/form-data" 才可以，楼主再试试
[/Quote]

正解

money8899 2009-05-20

打赏
举报

学习

tohmin 2009-05-19

打赏
举报

<s:form action="upload" theme="simple" enctype="multipart/form-data">
.......
</s:form>
Stuts2中上传文件，form的 enctype 要设成， enctype="multipart/form-data" 才可以，楼主再试试