Upload in CQ5

Example:
Type 1)
<form action="http://localhost:4502/content/dam/einstants/*" method="POST" enctype="multipart/form-data"> 
<input name="./jcr:content/renditions/original" type="file"> 
<input name="./jcr:primaryType" value="dam:Asset" type="hidden"> 
<input name="./jcr:content/jcr:primaryType" value="dam:AssetContent" type="hidden"> 
<input name="./jcr:content/renditions/original@TypeHint" value="nt:file" type="hidden"> 
<input name="./jcr:content/metadata/jcr:primaryType" value="nt:unstructured" type="hidden"> 
<input name="./jcr:content/metadata/dc:title" value="Title of the asset" type="hidden"> 
<input type="submit"> 
</form>


Type 2)

 CQ already has Apache Commons FileUploadinstalled, so you decide to use it to handle the file upload.

You write your servlet code and end up with something like this:

// Check that we have a file upload request

final boolean isMultipart = ServletFileUpload.isMultipartContent(request);

PrintWriter out = null;

try {

  out = response.getWriter();

  if (isMultipart) {

    final Map<String, RequestParameter[]> params = request.getRequestParameterMap();

    for (final Map.Entry<String, RequestParameter[]> pairs : params.entrySet()) {

      final String k = pairs.getKey();

      final RequestParameter[] pArr = pairs.getValue();

      final RequestParameter param = pArr[0];

      final InputStream stream = param.getInputStream();

      if (param.isFormField()) {

        out.println("Form field " + k + " with value " + Streams.asString(stream) + " detected.");

      } else {

        out.println("File field " + k + " with file name " + param.getFileName() + " detected.");

      }

    }

  }

Type 3)

<%@page import="javax.jcr.Session"%>
<%@page import="javax.jcr.Node"%>
<%@page import="java.io.ByteArrayInputStream"%>
<%@page import="java.util.Calendar"%>
<%@taglib prefix="sling" uri="http://sling.apache.org/taglibs/sling/1.0"%>
<sling:defineObjects/>
<%// get the root nodeSession 
mySession = slingRequest.getResourceResolver().adaptTo(Session.class);
Node root = mySession.getRootNode();
// create a new node of type nt:fileNode
myNewNode = root.getNode("content").addNode("mynewnode", "nt:file");

Node contentNode = myNewNode.addNode("_jcr_content", "nt:resource");
// set the mandatory properties

contentNode.setProperty("jcr:data", new ByteArrayInputStream(request.getParameter("myfile").getBytes()));
contentNode.setProperty("jcr:lastModified", Calendar.getInstance());
contentNode.setProperty("jcr:mimeType", "mymimetype");

mySession.save();%>