文件上传的时候报错问题，小白求解答

好记古啊古 2017-10-09 09:37:27

org.apache.commons.fileupload.FileUploadBase$InvalidContentTypeException: the request doesn't contain a multipart/form-data or multipart/mixed stream, content type header is application/x-www-form-urlencoded
at org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:947)
at org.apache.commons.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:310)
at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:334)
at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:115)
at com.atguigu.javaweb.UploadServlet.doPost(UploadServlet.java:41)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:643)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
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:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:610)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:503)
at java.lang.Thread.run(Thread.java:745)

jsp页面代码：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="uploadServlet" enctype="multipart/form-date" method="post">
<input type="file" value="file"><br>
<input type="text" name = "text">
<br>
<input type="submit" value="提交">

</form>
</body>
</html>

uploadServlet.java代码：
package com.atguigu.javaweb;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

/**
* Servlet implementation class UploadServlet
*/
public class UploadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
DiskFileItemFactory factory = new DiskFileItemFactory();

factory.setSizeThreshold(1024 * 500);
File tempDirectory = new File("D:\\tempDirectory");
factory.setRepository(tempDirectory);

ServletFileUpload upload = new ServletFileUpload(factory);
upload.setFileSizeMax(1024 * 1024 * 5);

try {
List<FileItem> items = upload.parseRequest(request);
for(FileItem item:items){
if(item.isFormField()){
String name = item.getFieldName();
String value = item.getString();
System.out.println(name + ":" + value);
}else{

String fieldname = item.getFieldName();
String filename = item.getName();
String contentType = item.getContentType();
long sizeInBytes = item.getSize();

System.out.println(fieldname);
System.out.println(filename);
System.out.println(contentType);
System.out.println(sizeInBytes);

InputStream inputStream = item.getInputStream();
byte [] buffer = new byte[1024];
int len = 0;

filename = "D:\\files\\" + filename;
System.out.println(filename);
OutputStream outputStream = new FileOutputStream(filename);
while((len = inputStream.read(buffer)) != -1){
outputStream.write(buffer, 0, len);
}
outputStream.close();
inputStream.close();

}
}
} catch (FileUploadException e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
}

}

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