How to send Json to JSP from servlet , with out converting it to a String

Question

I have an Ajax call in my JSP which returns a JSON object in the form of Java string.

public void doGet(HttpServletRequest request, HttpServletResponse res) throws IOException, ServletException {
    try {
        String fromDate = request.getParameter("drFrom");
        String toDate = request.getParameter("drTo");
        JSONArray jsonArray = chartData.getCCSBJson(fromDate, toDate);
        res.setContentType("application/json");
        res.getWriter().write(jsonArray.toString());

Can I send the JSON to JSP without using jsonArray.toString() inside res.getWriter().write(jsonArray.toString());, because I am not able to parse the JSON in JSP after sending it as a string.

This is related to the post: How to parse a JSON object from ajax call in Java Script

There should be no problem when converting a JSONXxx object to String because that's the real JSON format. The problem is in your JSONArray. Post the code for chartData.getCCSBJson(fromDate, toDate). Or maybe the problem is in JSP side. Post how you're parsing the String in your client. — Luiggi Mendoza
– Luiggi Mendoza, Commented Jun 4, 2014 at 16:05
possible duplicate of How to parse a JSON object from ajax call in Java Script — Whymarrh
– Whymarrh, Commented Jun 4, 2014 at 22:46

Community · Accepted Answer · 2020-06-20 09:12:55Z

3

Simply parse the JSON string into Java object in Servlet itself and pass the Java Object to the JSP instead of plain String.

Steps to follow:

Simply create a Java POJO class that is replica of JSON string
Convert the JSON string into POJO class object in the Servlet itself
Set the object in HTTP request as an attribute
Get the object back from HTTP request in JSP

Note: Java POJO class must be Serializable.

Try with JavaScript - JSON.parse() method that parses a string as JSON, optionally transforming the value produced by parsing in JavaScript.

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Jun 4, 2014 at 19:37

Braj

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