java - Missing images when using a servlet and Jetty -


i have created small maven project, using servlets , jetty. servlet works fine , outputs html page. however, linked image not displayed (missing).

this small piece of code setup server ...

    // set handler 1 (display html)     servletcontexthandler context = new servletcontexthandler(servletcontexthandler.sessions);     context.setcontextpath("/");     context.addservlet(new servletholder(hws),"/hello");      // set handler 2 (for images)     webappcontext wac = new webappcontext();     wac.setcontextpath("/img");      // attach handlers server     handlerlist.sethandlers(new handler[]{context,wac});     myserver.sethandler(handlerlist);

a piece of servlet ouputs html ...

    printwriter out = response.getwriter();     response.setcontenttype( "text/html");      out.println( "<html><head><title>hellow world</title></head>");     out.println( "<body><h1>hello world</h1>" );        out.println( "<img src=\"/img/img.jpg\">" );     out.println( "</body></html>");     out.close();

the image file (img.jpg) after build, located in subfolder "img" in root of jar file ...

i use many more images, css files , javascripts. of them embeded in jar file.

does have experience in displaying images in ouput of servlet, , images located within jar file ?

thanks

your webappcontext has no resource base defined.

that means there's no files serve.

since using servletcontexthandler, might want consider...

  1. using resource base on servletcontexthandler points url /webroot in jar file. making /webroot/img/ directory in it.
  2. or adding defaultservlet reference serving static files, own defined resource base.

-

Popular posts from this blog

c# - ODP.NET Oracle.ManagedDataAccess causes ORA-12537 network session end of file -

overview i want replace oracle.dataaccess orcale. managed dataaccess, opening connection latter throws ora-12537 network session end of file exception. exception message / stack trace {oracleinternal.network.networkexception (0x000030f9): ora-12537 : netzwerksession: dateiende @ oracleinternal.network.readerstream.read(orabuf ob) @ oracleinternal.ttc.orabufreader.getdatafromnetwork() @ oracleinternal.ttc.orabufreader.read(boolean bignoredata) @ oracleinternal.ttc.marshallingengine.unmarshalub1(boolean bignoredata) @ oracleinternal.ttc.ttcprotocolnegotiation.readresponse()} i trying connect oracle 11g database , not have client installed on local machine. working test application (unmanaged) using oracle.dataaccess works fine . using system; using oracle.dataaccess.client; namespace app.odp.unmanaged { internal class program { private static void main(string[] args) { //dummy connection string
Read more

matlab - Compression and Decompression of ECG Signal using HUFFMAN ALGORITHM -

i want compress , decompress ecg signal stored text message text file , find out file size, cr,prd ratio,and qs. here code compression , decompression of ecg signal using huffman algorithm. i'm trying find out file size, compression ratio,prd ratio,qs. but error i'm getting the ecg file in text format. %clearing variables , screen enter code here clear all; close all; clc; [file1]=uigetfile('*.txt'); %fprintf('enter ecg file name :%s',file1); p=file1; t=sprintf('%s',p); b1=dlmread([file1]); len=length(b1); lead=input('enter lead number :'); %lead=str2double(lead); col2=b1(1:end,lead); e=fix(sqrt(len)); m=1; i=1:e j=1:e g2(i,j)=fix(col2(m)*1000); %amplifying 1000 m=m+1; end end g3=g2; i=1:e j=1:e
Read more

utf 8 - split utf-8 string into bytes in python -

i trying split utf-8 string bytes in python 3. problem is, when use bytearray, byte, encode etc functions array size of element 14 bytes, not 1 byte expected. need split text file sequence of bytes , send them byte after byte using sockets. tried this: infile = open (file, "r") str = infile.read() byte_str = bytes(str, 'utf-8') print("size of byte_str",sys.getsizeof(byte_str[0])) print gives me 14, need 1... suggestion? quoting official documentation : sys.getsizeof(object[, default]) return size of object in bytes. object can type of object. built-in objects return correct results, not have hold true third-party extensions implementation specific. only memory consumption directly attributed object accounted for, not memory consumption of objects refers to. if given, default returned if object not provide means retrieve size. otherwise typeerror raised. getsizeof() calls object’s __sizeof__ method , adds
Read more