Pattern imgPattern = Pattern.compile("<img (.+?)>", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
Pattern videoPattern = Pattern.compile("<video (.+?)>", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
Pattern filePattern = Pattern.compile("<a (.+?)>", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);

Pattern urlPattern = Pattern.compile("(http(s?):\\/\\/|www\\.)(([\\w\\-]+\\.){1,}?([\\w\\-.~]+\\/?)*[\\p{Alnum}.,%_=?&#\\-+()\\[\\]\\*$~@!:/{};']*)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);

private String keyword = "cms-download";

String content = "<img class=\"cms-download\" src=\"http://abc.com\">abc";

Matcher imgMatcher = imgPattern.matcher(content);
List<String> oldUrl = new ArrayList<>();
List<String> newUrl = new ArrayList<>();
while (imgMatcher.find()) {
   String imgTag = content.substring(imgMatcher.start(1), imgMatcher.end());
   if (imgTag.contains(keyword)) {
      Matcher urlMatcher = urlPattern.matcher(imgTag);
      if (urlMatcher.find()) {
         String url = imgTag.substring(urlMatcher.start(1), urlMatcher.end());
         oldUrl.add(url);
         newUrl.add(downloadImage(url, site));
      }
   }
}
for (int i = 0; i < oldUrl.size(); i++) {
   content = content.replace(oldUrl.get(i), newUrl.get(i));
}
return content;

cd ~/download
wget jdk-7u80-linux-x64.tar.gz
mkdir /usr/local/java && cd /usr/local/java
tar xzvf ~/download/jdk-7u80-linux-x64.tar.gz
mv jdk1.7.0_80/ jdk1.7

vi ~/.bash_profile

export JAVA_HOME=/usr/local/java/jdk1.7
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

source ~/.bash_profile

cd ~/download
wget jdk-8u231-linux-x64.tar.gz
mkdir /usr/local/java && cd /usr/local/java
tar xzvf ~/download/jdk-8u231-linux-x64.tar.gz
mv jdk1.8.0_231/ jdk1.8

vi ~/.bash_profile

export JAVA_HOME=/usr/local/java/jdk1.8
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib:$JAVA_HOME/jre/lib

source ~/.bash_profile

response.setContentType("application/json");
response.setCharacterEncoding("UTF-8");
PrintWriter out = response.getWriter();
out.print("[]");
out.flush();

try {
  HttpClient httpclient = new DefaultHttpClient();
  httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
  HttpPost httppost = new HttpPost(postUrl);
  MultipartEntity mpEntity = new MultipartEntity();
  Iterator<Map.Entry<String, Object>> iter = formParams.entrySet().iterator();
  while (iter.hasNext()) {
    Map.Entry<String, Object> entry = iter.next();
    String inputName = entry.getKey();
    String inputValue = entry.getValue().toString();
    mpEntity.addPart(inputName, new StringBody(inputValue, Charset.defaultCharset()));
  }
  mpEntity.addPart("file", new FileBody(file, "image/jpeg"));
  httppost.setEntity(mpEntity);
  System.out.println("executing request " + httppost.getRequestLine());
  HttpResponse response2 = null;
  response2 = httpclient.execute(httppost);

  HttpEntity resEntity = response2.getEntity();
  System.out.println(response2.getStatusLine());
  if (resEntity != null) {
    System.out.println(EntityUtils.toString(resEntity));
  }
  httpclient.getConnectionManager().shutdown();
} catch (IOException e) {
  e.printStackTrace();
}

try (BufferedInputStream in = new BufferedInputStream(new URL(FILE_URL).openStream());
  FileOutputStream fileOutputStream = new FileOutputStream(FILE_NAME)) {
    byte dataBuffer[] = new byte[1024];
    int bytesRead;
    while ((bytesRead = in.read(dataBuffer, 0, 1024)) != -1) {
        fileOutputStream.write(dataBuffer, 0, bytesRead);
    }
} catch (IOException e) {
    // handle exception
}

InputStream in = new URL(FILE_URL).openStream();
Files.copy(in, Paths.get(FILE_NAME), StandardCopyOption.REPLACE_EXISTING);

public static String URLReader(URL url) throws IOException {
    StringBuilder sb = new StringBuilder();
    String line;
 
    InputStream in = url.openStream();
    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        while ((line = reader.readLine()) != null) {
            sb.append(line).append(System.lineSeparator());
        }
    } finally {
        in.close();
    }
 
    return sb.toString();
}

URL website = new URL("http://www.website.com/information.asp");
ReadableByteChannel rbc = Channels.newChannel(website.openStream());
FileOutputStream fos = new FileOutputStream("information.html");
fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);

FileUtils.copyURLToFile(new URL(FILE_URL), new File(FILE_NAME), CONNECT_TIMEOUT, READ_TIMEOUT);

path = Files.createTempFile("test-file", ".html");
System.out.println("Probe Content Type for file: " + path);
type = Files.probeContentType(path);
System.out.println("File Content type: " + type);

final MimetypesFileTypeMap fileTypeMap = new MimetypesFileTypeMap();
fileTypeMap.getContentType(fileName);

final URL url = new URL("file://" + fileName);
final URLConnection connection = url.openConnection();
fileType = connection.getContentType();

Tika tika = new Tika(); 
tika.detect(istream);
tika.detect(file);

--spring.profiles.active=dev
--server.port=8080

mvn archetype:generate -DgroupId=cc.aneat.example -DartifactId=example -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

mvn archetype:generate -DgroupId=com.travelight.framework -DartifactId=core -DarchetypeArtifactId=maven-archetype-webapp -DinteractiveMode=false