自己解决了很久都没解决出来,上google问了还是没找到答案,请大家帮我看下哪儿出错了,程序功能是从自己计算机的硬盘上上传一张图片到本机的D:\\temp目录下,
以下是servlet程序代码
package com.weiweiqin.servlet;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
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.FileUploadBase.SizeLimitExceededException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class FileUploadServlet extends HttpServlet {
public FileUploadServlet() {
super();
}
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
//Put your code here
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
final long MAX_SIZE = 3 * 1024 * 1024;// 设置上传文件最大为 3M
// 允许上传的文件格式的列表
final String[] allowedExt = new String[] { "jpg", "jpeg", "gif", "txt",
"doc", "docx", "mp3", "wma", "m4a" };
response.setContentType("text/html");
// 设置字符编码为UTF-8, 这样支持汉字显示
response.setCharacterEncoding("UTF-8");
// 实例化一个硬盘文件工厂,用来配置上传组件ServletFileUpload
DiskFileItemFactory dfif = new DiskFileItemFactory();
dfif.setSizeThreshold(4096);// 设置上传文件时用于临时存放文件的内存大小,这里是4K.多于的部分将临时存在硬盘
dfif.setRepository(new File("E://picture")); // 设置存放临时文件的目录,web根目录下的ImagesUploadTemp目录
// 用以上工厂实例化上传组件
ServletFileUpload sfu = new ServletFileUpload(dfif);
// 设置最大上传尺寸
sfu.setSizeMax(MAX_SIZE);
PrintWriter out = response.getWriter();
// 从request得到 所有 上传域的列表
List fileList = null;
try {
fileList = sfu.parseRequest(request);
} catch (FileUploadException e) {// 处理文件尺寸过大异常
if (e instanceof SizeLimitExceededException) {
out.println("上传文件有误");
return;
}
e.printStackTrace();
}
// 没有文件上传
if (fileList == null || fileList.size() == 0) {
out.println("上传文件有误");
return;
}
// 得到所有上传的文件
Iterator fileItr = fileList.iterator();
// 循环处理所有文件
while (fileItr.hasNext()) {
FileItem fileItem = null;
String path = null;
long size = 0;
// 得到当前文件
fileItem = (FileItem) fileItr.next();
// 忽略简单form字段而不是上传域的文件域(<input type="text" />等)
if (fileItem == null || fileItem.isFormField()) {
continue;
}
// 得到文件的完整路径
path = fileItem.getName();
// 得到文件的大小
size = fileItem.getSize();
if ("".equals(path) || size == 0) {
out.println("上传文件有误");
return;
}
// 得到去除路径的文件名
String t_name = path.substring(path.lastIndexOf("\\") + 1);
// 得到文件的扩展名(无扩展名时将得到全名)
String t_ext = t_name.substring(t_name.lastIndexOf(".") + 1);
// 拒绝接受规定文件格式之外的文件类型
int allowFlag = 0;
int allowedExtCount = allowedExt.length;
for (; allowFlag < allowedExtCount; allowFlag++) {
if (allowedExt[allowFlag].equals(t_ext))
break;
}
if (allowFlag == allowedExtCount) {
out.println("请上传以下类型的文件");
for (allowFlag = 0; allowFlag < allowedExtCount; allowFlag++)
out.println("上传文件有误");
return;
}
long now = System.currentTimeMillis();
// 根据系统时间生成上传后保存的文件名
String prefix = String.valueOf(now);
// 保存的最终文件完整路径,保存在web根目录下的ImagesUploaded目录下
String u_name = "E:/temp"; \\这里是出错位置tomcat抛出java.io.FileNotFoundException: E:\temp (拒绝访问。)
try {
// 保存文件
fileItem.write(new File("E:\\temp"));
out.println(u_name + size + "字节<p />");
out.println("<a href=\"upload.html\" </a>");
} catch (Exception e) {
e.printStackTrace();
}
}
}
} 详细错误如下:
java.io.FileNotFoundException: E:\temp (拒绝访问。)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)
at org.apache.commons.fileupload.disk.DiskFileItem.write(DiskFileItem.java:439)
at com.weiweiqin.servlet.FileUploadServlet.doPost(FileUploadServlet.java:126)
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:233)
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:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
以下是servlet程序代码
package com.weiweiqin.servlet;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
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.FileUploadBase.SizeLimitExceededException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class FileUploadServlet extends HttpServlet {
public FileUploadServlet() {
super();
}
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
//Put your code here
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
final long MAX_SIZE = 3 * 1024 * 1024;// 设置上传文件最大为 3M
// 允许上传的文件格式的列表
final String[] allowedExt = new String[] { "jpg", "jpeg", "gif", "txt",
"doc", "docx", "mp3", "wma", "m4a" };
response.setContentType("text/html");
// 设置字符编码为UTF-8, 这样支持汉字显示
response.setCharacterEncoding("UTF-8");
// 实例化一个硬盘文件工厂,用来配置上传组件ServletFileUpload
DiskFileItemFactory dfif = new DiskFileItemFactory();
dfif.setSizeThreshold(4096);// 设置上传文件时用于临时存放文件的内存大小,这里是4K.多于的部分将临时存在硬盘
dfif.setRepository(new File("E://picture")); // 设置存放临时文件的目录,web根目录下的ImagesUploadTemp目录
// 用以上工厂实例化上传组件
ServletFileUpload sfu = new ServletFileUpload(dfif);
// 设置最大上传尺寸
sfu.setSizeMax(MAX_SIZE);
PrintWriter out = response.getWriter();
// 从request得到 所有 上传域的列表
List fileList = null;
try {
fileList = sfu.parseRequest(request);
} catch (FileUploadException e) {// 处理文件尺寸过大异常
if (e instanceof SizeLimitExceededException) {
out.println("上传文件有误");
return;
}
e.printStackTrace();
}
// 没有文件上传
if (fileList == null || fileList.size() == 0) {
out.println("上传文件有误");
return;
}
// 得到所有上传的文件
Iterator fileItr = fileList.iterator();
// 循环处理所有文件
while (fileItr.hasNext()) {
FileItem fileItem = null;
String path = null;
long size = 0;
// 得到当前文件
fileItem = (FileItem) fileItr.next();
// 忽略简单form字段而不是上传域的文件域(<input type="text" />等)
if (fileItem == null || fileItem.isFormField()) {
continue;
}
// 得到文件的完整路径
path = fileItem.getName();
// 得到文件的大小
size = fileItem.getSize();
if ("".equals(path) || size == 0) {
out.println("上传文件有误");
return;
}
// 得到去除路径的文件名
String t_name = path.substring(path.lastIndexOf("\\") + 1);
// 得到文件的扩展名(无扩展名时将得到全名)
String t_ext = t_name.substring(t_name.lastIndexOf(".") + 1);
// 拒绝接受规定文件格式之外的文件类型
int allowFlag = 0;
int allowedExtCount = allowedExt.length;
for (; allowFlag < allowedExtCount; allowFlag++) {
if (allowedExt[allowFlag].equals(t_ext))
break;
}
if (allowFlag == allowedExtCount) {
out.println("请上传以下类型的文件");
for (allowFlag = 0; allowFlag < allowedExtCount; allowFlag++)
out.println("上传文件有误");
return;
}
long now = System.currentTimeMillis();
// 根据系统时间生成上传后保存的文件名
String prefix = String.valueOf(now);
// 保存的最终文件完整路径,保存在web根目录下的ImagesUploaded目录下
String u_name = "E:/temp"; \\这里是出错位置tomcat抛出java.io.FileNotFoundException: E:\temp (拒绝访问。)
try {
// 保存文件
fileItem.write(new File("E:\\temp"));
out.println(u_name + size + "字节<p />");
out.println("<a href=\"upload.html\" </a>");
} catch (Exception e) {
e.printStackTrace();
}
}
}
} 详细错误如下:
java.io.FileNotFoundException: E:\temp (拒绝访问。)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(Unknown Source)
at java.io.FileOutputStream.<init>(Unknown Source)
at org.apache.commons.fileupload.disk.DiskFileItem.write(DiskFileItem.java:439)
at com.weiweiqin.servlet.FileUploadServlet.doPost(FileUploadServlet.java:126)
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:233)
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:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
package com.gtomat;import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
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.FileUploadBase.SizeLimitExceededException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;public class UploadImage extends HttpServlet { private static final long serialVersionUID = 1L;
final long MAX_SIZE = 3 * 1024 * 1024;// 设置上传文件最大为 16M
// 允许上传的文件格式的列表
final String[] allowedExt = new String[]{ "jpg", "jpeg", "gif", "txt","doc", "docx", "mp3", "wma", "m4a" }; public UploadImage() {
super();
} public void destroy() {
super.destroy();
} public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
} public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
response.setCharacterEncoding("UTF-8");// 设置post字符编码为UTF-8,Get的设置方法为在tomcat的server.xml下加URIEcoding="utf-8"
PrintWriter out = response.getWriter();
DiskFileItemFactory dfif = new DiskFileItemFactory();// 实例化一个硬盘文件工厂,用来配置上传组件ServletFileUpload
dfif.setSizeThreshold(4096);// 设置上传文件时用于临时存放文件的内存大小,这里是4K.多于的部分将临时存在硬盘
dfif.setRepository(new File("D:/jsp/temp")); // 设置存放临时文件的目录,web根目录下的ImagesUploadTemp目录 ServletFileUpload sfu = new ServletFileUpload(dfif);// 用以上工厂实例化上传组件
sfu.setSizeMax(MAX_SIZE);// 设置最大上传尺寸 // 从request得到所有上传域的列表
List fileList = null;
try {
fileList = sfu.parseRequest(request);
} catch (FileUploadException e) {// 处理文件尺寸过大异常
if (e instanceof SizeLimitExceededException) {
out.println("上传文件有误,文件过大");
return;
}
e.printStackTrace();
}
if (fileList == null || fileList.size() == 0) {// 没有文件上传
out.println("上传文件有误,没有找到任何上传的文件");
return;
}
Iterator fileItr = fileList.iterator();//用从request中得到的所有上传文件的List类对象实例化一个Iterator对象以便对所有文件进行遍历
while (fileItr.hasNext()) {
FileItem fileItem = null;
String path = null;
long size = 0;
fileItem = (FileItem) fileItr.next();// 得到当前文件
if (fileItem == null || fileItem.isFormField()) {// 忽略简单form字段而不是上传域的文件域(如<input type="text" />等)
continue;
}
path = fileItem.getName();// 得到带路径的文件名文件
size = fileItem.getSize();// 得到文件的大小
if ("".equals(path) || size == 0) {
out.println("上传文件有误");
return;
} String short_name = path.substring(path.lastIndexOf("\\") + 1);// 得到不带路径的文件名
String file_ext = short_name.substring(short_name.lastIndexOf(".") + 1);// 得到文件的扩展名(无扩展名时将得到全名)
System.out.println(file_ext);
// 拒绝接受规定文件格式之外的文件类型
boolean allowFile = false;
int allowedExtCount = allowedExt.length;
for (int i = 0; i < allowedExtCount; i++) {
if (allowedExt[i].equals(file_ext)){
allowFile = true;
break;
}
}
if (!allowFile) {
out.println("请上传以下类型的文件");
for (int i = 0; i < allowedExtCount; i++)
out.print(allowedExt[i]+"\t");
return;
} long now = System.currentTimeMillis();// 根据系统时间生成上传后保存的文件名(返回值为1970.01.01 00:00:00 0个毫秒到现在的一个长整型数字)
String prefix = String.valueOf(now);// 保存的最终文件完整路径,保存在web根目录下的ImagesUploaded目录下
//String use_name = "D:/jsp/temp";
try {
fileItem.write(new File("D:/jsp/picture/"+prefix+"."+file_ext));// 将文件保存到服务器端的磁盘上
//out.println(use_name + size + "字节<p />");
out.println("<a href=\"upload.html\">upload.jsp</a>");
} catch (Exception e) {
e.printStackTrace();
}
} }
}红色的部分是我主要改的地方 后世小子若是粘贴后有标签请自行删除 还有就是个人习惯问题所以改掉了主人的一些变量名字 但是和主人的非常相近 若是看不懂得话证明还得继续修炼啊 。最后祝大家学习快乐!