Question

Java

1. public void writeJSON(PrintStream ps) {

Write the member variables in JSON format to the given PrintStream

}

2. public void writeJSON(PrintStream ps){

Write the member variables in JSON format to the given PrintStream.

}

Answer 1

Here I have created a dummy JSON string to write it is a proper json format.

You can specify a path and file name where you want to store the JSON formatted Data

package com.kontrolscan.services.impl;

import java.io.IOException;
import java.io.PrintStream;

import org.json.JSONException;

import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;

public class Testing {

        public static void main(String[] args) throws JsonParseException, JsonMappingException, IOException {
                PrintStream ps = new PrintStream("/home/amity/Desktop/atesting.txt");
                writeJSON(ps);
        }

        public static void writeJSON(PrintStream ps) throws JsonParseException, JsonMappingException, IOException {

                String s = "{\"phonetype\":\"N95\",\"cat\":\"WP\"}";
                try {
                        String formattedJSON = beautify(s);
                        ps.print(formattedJSON);
                        ps.close();
                } catch (JSONException err) {
                        System.out.println("JSON Parsing error");
                }
        }
        public static String beautify(String jsonAsString) throws JsonParseException, JsonMappingException, IOException {
                ObjectMapper mapper = new ObjectMapper();
            Object obj = mapper.readValue(jsonAsString, Object.class);
            return mapper.writerWithDefaultPrettyPrinter().writeValueAsString(obj);
        }
}