Web 开发中文件上传是出现的：java.io.FileNotFoundException: (文件名、目录名或卷标语法不正确。)

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Web 开发中文件上传是出现的：java.io.FileNotFoundException: (文件名、目录名或卷标语法不正确。)
1. <span style="font-family: Arial, Helvetica, sans-serif; ">
2. </span>
<span style="font-family: Arial, Helvetica, sans-serif; "><span style="color:#ff0000;">一环境的搭建：</span></span>
eclipase + javaEE + commons-fileupload-1.2.1.jar + commons-io-2.0.jar + tomcat 7.0.68

二文件上传的servlet 代码实现！
1. package com.baidu.fileupload.servlet;
3. import java.io.File;
4. import java.io.FileOutputStream;
5. import java.io.IOException;
6. import java.io.InputStream;
7. import java.io.OutputStream;
8. import java.util.List;
10. import javax.servlet.ServletException;
11. import javax.servlet.annotation.WebServlet;
12. import javax.servlet.http.HttpServlet;
13. import javax.servlet.http.HttpServletRequest;
14. import javax.servlet.http.HttpServletResponse;
16. import org.apache.commons.fileupload.FileItem;
17. import org.apache.commons.fileupload.FileUploadException;
18. import org.apache.commons.fileupload.disk.DiskFileItemFactory;
19. import org.apache.commons.fileupload.servlet.ServletFileUpload;
21. @WebServlet("/uploadServlet")
22. public class UploadServlet extends HttpServlet {
24. private static final long serialVersionUID = 1L;
26. protected void doPost(HttpServletRequest request,
27. HttpServletResponse response) throws ServletException, IOException {
30. DiskFileItemFactory factory = new DiskFileItemFactory();
33. factory.setSizeThreshold(1024*500);
34. File tempDirectory = new File("d:\tempDirectory");
35. factory.setRepository(tempDirectory);
37. ServletFileUpload upload = new ServletFileUpload(factory);
39. try {
40. List<FileItem> items = upload.parseRequest(request);
41. for(FileItem item:items){
42. if(item.isFormField()){
43. String name = item.getFieldName();
44. String value = item.getString();
46. System.out.println( name + " : " + value);
47. }else{
48. String fieldName = item.getFieldName();
49. String fileName = item.getName();
50. String contentType = item.getContentType();
51. long sizeInBytes = item.getSize();
53. System.out.println(fieldName);
54. System.out.println(fileName);
55. System.out.println(contentType);
56. System.out.println(sizeInBytes);
59. InputStream in = item.getInputStream();
60. byte[] buffer = new byte[1024];
61. int len = 0;
63. fileName = "d:\files\" + fileName;
64. System.out.println(fileName);
66. OutputStream out = new FileOutputStream(fileName);
68. while((len = in.read(buffer)) != -1){
69. out.write(buffer, 0, len);
71. }
72. out.close();
73. in.close();
74. }
75. }
77. } catch (FileUploadException e) {
78. e.printStackTrace();
79. }
80. }
81. }
三 JSP 编写

update.jsp
1. <%@ page language="java" contentType="text/html; charset=UTF-8"
2. pageEncoding="UTF-8"%>
3. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
4. <html>
5. <head>
6. <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
7. <title>Insert title here</title>
8. </head>
9. <body>
11. <form action="uploadServlet" method="post" enctype="multipart/form-data">
14. File: <input type="file" name="file" />
15. <br><br>
16. <br><br>
17. DESC: <input type="text" name="desc" />
18. <br><br>
19. <br><br>
20. <input type="submit" value="Submit" />
21. </form>
23. </body>
24. </html>
四，运行过程中出现的问题

五，解决的办法：

进过一番百度，无意中看到一位朋友提到，不同的浏览器对上传的文件名的处理方式不太一样，进过一番实验，搞定，且增加了一行代码！
1. package com.baidu.fileupload.servlet;
3. import java.io.File;
4. import java.io.FileOutputStream;
5. import java.io.IOException;
6. import java.io.InputStream;
7. import java.io.OutputStream;
8. import java.util.List;
10. import javax.servlet.ServletException;
11. import javax.servlet.annotation.WebServlet;
12. import javax.servlet.http.HttpServlet;
13. import javax.servlet.http.HttpServletRequest;
14. import javax.servlet.http.HttpServletResponse;
16. import org.apache.commons.fileupload.FileItem;
17. import org.apache.commons.fileupload.FileUploadException;
18. import org.apache.commons.fileupload.disk.DiskFileItemFactory;
19. import org.apache.commons.fileupload.servlet.ServletFileUpload;
21. @WebServlet("/uploadServlet")
22. public class UploadServlet extends HttpServlet {
24. private static final long serialVersionUID = 1L;
26. protected void doPost(HttpServletRequest request,
27. HttpServletResponse response) throws ServletException, IOException {
30. DiskFileItemFactory factory = new DiskFileItemFactory();
33. factory.setSizeThreshold(1024*500);
34. File tempDirectory = new File("d:\tempDirectory");
35. factory.setRepository(tempDirectory);
37. ServletFileUpload upload = new ServletFileUpload(factory);
39. upload.setSizeMax(1024 * 1024 * 5);
41. try {
42. List<FileItem> items = upload.parseRequest(request);
43. for(FileItem item:items){
44. if(item.isFormField()){
45. String name = item.getFieldName();
46. String value = item.getString();
48. System.out.println( name + " : " + value);
49. }else{
50. String fieldName = item.getFieldName();
51. String fileName = item.getName();
52. String contentType = item.getContentType();
53. long sizeInBytes = item.getSize();
55. System.out.println(fieldName);
56. System.out.println(fileName);
57. System.out.println(contentType);
58. System.out.println(sizeInBytes);
60. //不同的浏览器提交的文件名是不一样的，有些浏览器提交的文件名是带有路径的，如：c: ihaoa.txt，而有些只是单纯的文件名，如：a.txt
61. //处理获取到的上传文件的文件名的路径部分，只保留文件名部分
62. fileName = fileName.substring(fileName.lastIndexOf("\")+1);
64. InputStream in = item.getInputStream();
65. byte[] buffer = new byte[1024];
66. int len = 0;
68. fileName = "d:\files\" + fileName;
69. System.out.println(fileName);
71. OutputStream out = new FileOutputStream(fileName);
73. while((len = in.read(buffer)) != -1){
74. out.write(buffer, 0, len);
76. }
77. out.close();
78. in.close();
79. }
80. }
82. } catch (FileUploadException e) {
83. e.printStackTrace();
84. }
85. }
86. }
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原文地址：https://www.cnblogs.com/zhuyeshen/p/11435869.html

Web 开发中 文件上传 是出现的：java.io.FileNotFoundException: (文件名、目录名或卷标语法不正确。)

Web 开发中文件上传是出现的：java.io.FileNotFoundException: (文件名、目录名或卷标语法不正确。)