HTTP Status 500 – Internal Server Error

Type Exception Report

Message java.io.FileNotFoundException: /www/server/apache-tomcat-8.5.32/webapps/ROOT/upload/letter1.jpg (Permission denied)

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

java.io.IOException: java.io.FileNotFoundException: /www/server/apache-tomcat-8.5.32/webapps/ROOT/upload/letter1.jpg (Permission denied)

www.UploadServlet.doPost(UploadServlet.java:57)

javax.servlet.http.HttpServlet.service(HttpServlet.java:661)

javax.servlet.http.HttpServlet.service(HttpServlet.java:742)

org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Root Cause

java.io.FileNotFoundException: /www/server/apache-tomcat-8.5.32/webapps/ROOT/upload/letter1.jpg (Permission denied)

java.io.FileOutputStream.open0(Native Method)

java.io.FileOutputStream.open(FileOutputStream.java:270)

java.io.FileOutputStream.(FileOutputStream.java:213)

java.io.FileOutputStream.(FileOutputStream.java:162)

org.apache.tomcat.util.http.fileupload.disk.DiskFileItem.write(DiskFileItem.java:400)

www.UploadServlet.doPost(UploadServlet.java:57)

javax.servlet.http.HttpServlet.service(HttpServlet.java:661)

javax.servlet.http.HttpServlet.service(HttpServlet.java:742)

org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

Note The full stack trace of the root cause is available in the server logs.

Apache Tomcat/8.5.32

package www;

import java.io.IOException;

import java.io.PrintWriter;

import javax.servlet.ServletException;

import javax.servlet.annotation.MultipartConfig;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.Part;

import org.apache.catalina.core.ApplicationPart;

/**

* Servlet implementation class UploadServlet

*/

@WebServlet("/UploadServlet")

@MultipartConfig( maxFileSize = 10*1024*1024)

public class UploadServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

/**

* @see HttpServlet#HttpServlet()

*/

public UploadServlet() {

super();

// TODO Auto-generated constructor stub

}

/**

* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

*/

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

// TODO Auto-generated method stub

}

/**

* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

*/

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

// TODO Auto-generated method stub

doGet(request, response);

response.setContentType("text/html");

response.setCharacterEncoding("utf-8");

request.setCharacterEncoding("utf-8");

PrintWriter out=response.getWriter();

String path=this.getServletContext().getRealPath("/");//获取服务器地址

Part p=request.getPart("file1");//获取用户选择的上传图片

if(p.getContentType().contains("image")){//仅处理图像文件

ApplicationPart ap=(ApplicationPart)p;

String fname1=ap.getSubmittedFileName();//获取上传文件名

int path_idx=fname1.lastIndexOf("\\")+1; //对上传文件名进行截取

String fname2=fname1.substring(path_idx, fname1.length());

p.write(path+"/upload/"+fname2); //写入web目录根路径下的upload文件夹中

out.write("文件上传成功"+path);

}else {

out.write("请选择图片文件!!!!!!");

}

}

}

57行

p.write(path+"/upload/"+fname2); //写入web目录根路径下的upload文件夹中

看得好费劲啊，请使用添加代码功能：

package www;


import java.io.IOException;

import java.io.PrintWriter;


import javax.servlet.ServletException;

import javax.servlet.annotation.MultipartConfig;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.Part;


import org.apache.catalina.core.ApplicationPart;


/**

* Servlet implementation class UploadServlet

*/

@WebServlet("/UploadServlet")

@MultipartConfig( maxFileSize = 10*1024*1024)

public class UploadServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

/**

* @see HttpServlet#HttpServlet()

*/

public UploadServlet() {

super();

// TODO Auto-generated constructor stub

}


/**

* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

*/

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

// TODO Auto-generated method stub

}


/**

* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

*/

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

// TODO Auto-generated method stub

doGet(request, response);

response.setContentType("text/html");

response.setCharacterEncoding("utf-8");

request.setCharacterEncoding("utf-8");

PrintWriter out=response.getWriter();

String path=this.getServletContext().getRealPath("/");//获取服务器地址

Part p=request.getPart("file1");//获取用户选择的上传图片

if(p.getContentType().contains("image")){//仅处理图像文件

ApplicationPart ap=(ApplicationPart)p;

String fname1=ap.getSubmittedFileName();//获取上传文件名

int path_idx=fname1.lastIndexOf("\\")+1; //对上传文件名进行截取

String fname2=fname1.substring(path_idx, fname1.length());

p.write(path+"/upload/"+fname2); //写入web目录根路径下的upload文件夹中

out.write("文件上传成功"+path);

}else {

out.write("请选择图片文件!!!!!!");

}

}


}

这个就不知道了，我用 commons fileupload库，处理的方式有点不同

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