Develop Reference

Multiple inline insert using Ajax & JSP [duplicate]

I have a JSON object sent from the browser to the jsp page.How do I receive that object and process it in jsp.Do I need any specific parsers? I have used the following piece of code.But it wouldn't work.Essentially I should read the contents of the object and print them in the jsp.
<%#page language="java" import="jso.JSONObject"%>
<%
JSONObject inp=request.getParameter("param1");
%>
<% for(int i=0;i<inp.size();i++)
{%>
<%=inp.getString(i)%>
<%
}
%>

My preferred solution to this problem involves using a JSON parser that provides an output that implements the java.util.Map and java.util.List interface. This allows for simple parsing of the JSON structure in the JSP Expression language.
Here is an example using JSON4J provided with Apache Wink. The sample imports JSON data from a URL, parses it in a java scriptlet and browses the resulting structure.
<c:import var="dataJson" url="http://localhost/request.json"/>
<%
String json = (String)pageContext.getAttribute("dataJson");
pageContext.setAttribute("parsedJSON", org.apache.commons.json.JSON.parse(json));
%>
Fetch the name of the node at index 1 : ${parsedJSON.node[1].name}
To make this clean, it would be preferable to create a JSTL tag to do the parsing and avoid java scriplet.
<c:import var="dataJson" url="http://localhost/request.json"/>
<json:parse json="${dataJson}" var="parsedJSON" />
Fetch the name of the node at index 1 : ${parsedJSON.node[1].name}

You can parse the input string to JSONValue and then cast it to JSONOject as like shown below
JSONObject inp = (JSONObject) JSONValue.parse(request.getParameter("param1"));

The svenson JSON library can also be used from JSP.

You've got several syntax errors in your example code.
First, request.getParameter returns a String, so setting it to a JSONObject won't work. Secondly, your for loop is incomplete.
I suggest looking into the various JSON libraries available for Java and using one of those.
To help get you started, I'd look at some decoding samples.

In general, you won't be passing JSON within query parameters -- too much quoting needed. Rather, you should POST with JSON as payload (content type 'application/json') or such.
But beyond this, you need a json parser; Json.org lists tons; my favorite is Jackson, which like most alternatives from the page can also be invoked from jsp.

Extract some data using Regex

I'm struggling some time to extract JSON data from one html tag. To be more specific it's a script tag and using JSOUP library I can get data between script tags. But inside there is some JSON data which I can't extract. Here is the tag:
<script type="text/javascript">jwplayer.key="WbtWzGvcRNi6Tk+gtKldIbx+nn6lXZFvKiaO2g==";jwplayer("tvplayer").setup({playlist:[{image: "http://img.canlitvlive.io/yayin/trt1_480.jpg?1509735585",title:"TRT 1 Canlı Yayın - CanliTVLive.io",file : "http://yayin.canlitvlive.io/trt1/live.m3u8?tkn=8JD95lXv9dOUXwtgOTBYfw&tms=1509749985"}],...</script>
I need url from file tag which is inside jwplayer. I tried using regular expression for example I tried somethig like this:
"playlist[\":\\s\\{]+file[\":\\s\\{]+\"([^\"]+)\""
But I don't have much experience with regex and can't figure out right pattern. Can someone help with this? Thanks

I'm guessing you just need some whitespace
file\s*:\s*"(.*?)"
https://regex101.com/r/4HldaP/3

jsoup to parse atypical markup

Can I use jsoup to parse non-standard markup, such as <LOCATION>, <PERSON>, or <ORGANIZATION>?
This is an example sentence in my corpus:
I HAD been hearing about vineyards in <LOCATION>Malibu</LOCATION> for some time,
but I wrote them off. Had to be a tourist gimmick, like
<PERSON>Knott</PERSON>'s <ORGANIZATION>Berry Farm</ORGANIZATION>
or the LaBrea Tar Pits. <LOCATION>Malibu</LOCATION> was the playground of the stars,
a surfers' mecca, but cabernet? No way.
I'd like to extract something like:
Location: Malibu
Person: Knott
Organization: Berry Farm

If it is not part of the HTML specification the default parse method will not handle the custom markup.
You can however tell JSoup to parse it as an XML:
Jsoup.parse(yourHtml, baseUriForLinks, Parser.xmlParser());
The command above will return a Document in which you can operate with your custom markup.
Where:
yourHtml - the HTML with the custom markup as String
baseUriForLinks - the base URL of the HTML (so that JSoup can resolve relative links if any are present) also as String

send HTML from servlet to JSP dynamically

Is there an easy way to send HTML from a servlet to a JSP, using AJAX.
I've already figured out how to make AJAX work with servlets dynamically, but now I want to press a button on a form and generate HTML based on text-input.
Is it possible, and if so, how, to send just pieces of HTML to an existing HTML page?
Example,
I have a basic form where you can input your age, and based on the age the text has a different size/color. So, you send for example, 25 as your age to the servlet, and it send back a piece of HTML like this <p STYLE="font-size: age;"> to the page.

Through ajax call you can get the output result either a string, html or a Json object that will be parsed and results can be displayed over JSP/HTML. So for sure you can send html code segment from servlet to jsp through ajax call.
For example you can use this approach--
1. Take a string variable in your servlet.
2. Put appropriate html string as per your conditions in this string variable
3. send this string as a response from servlet like:
response.setCharacterEncoding("UTF-8");
response.getWriter().write("your string variable here");
4. In your ajax call do like this:
success : function(dataString) {
document.getElementById("containerId").innerHTML=dataString;
},
where containerId is the id of html element (like div or span) where you want to display output html.

The easiest approach, without client-side javascript libraries, would be to point an HTML form to an iframe, just like
<iframe name="myIframe"...>
<form target="myIframe"...>
And submit your form as many times as necessary. The HTML returned by the servlet would load itself in the iframe element.
If you like AJAX and client-side javascript libraries, you can find very easy programmatical ways to do this in jQuery and similar libraries.

Basically your servlet can generate any kind of content, e.g. JSON, HTML etc.
You'd then send that content back to the client and integrate it into the page.
How that is done depends on the type of content.
Example:
You issue an AJX request (e.g. by using jQuery's ajax functionality) and your servlet generates plain html. When your JavaScript receives the anser you just replace the relevant part, e.g. by replacing the content of some defined element.
If you used JSON instead, your servlet might send data only instead, e.g. a font size based on the age as in your example. You'd then use JavaScript to access that JSON data and perform relevant operations, e.g. by changing the style of the paragraph.

Need to handle special characters in URL

My input html is
<p>
<span>first
</span>
<span>Google Cloud Connect for Microsoft Office</span>
</p>
I am using xslt1.0 to convert the html to xml..my output xml is
<Relationship Id="rId12700703801" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/hyperlink" Target="http://tools.google.com/dlpage/cloudconnect#utm_campaign=launch&utm_source=en-na-us-gdb-GCC-Appsperience_02242011&utm_medium=blog" TargetMode="External"/></Relationships>
with error "XML Parsing Error: not well-formed" in the location =(after launch&utm_source) in target attribute..
I want to escape the special characters present in url through xslt and make the xml.
Please help me. Thanks in advance..

are you generating the input html? if so you can use URLEncoder.encode to properly encode the string so the transformer doesn't complain about the syntax.
If this is just a random html page, and you have no control over it, then you probably need to use some html parser, such as tagsoup, et. al, to pre-correct it as most html files are not properly formatted.

XSLT expects XML as input, not HTML. You need to turn your HTML into XML if you want to transform it with XSLT.
I think it might be possible to do it with HTML Tidy.