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Main.java
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Main.java
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/*
* Copyright 2012-2014 Dristhi software
* Copyright 2015 Arkni Brahim
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package org.jsontocsv;
import java.io.File;
import java.net.URI;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.jsontocsv.parser.JSONFlattener;
import org.jsontocsv.writer.CSVWriter;
public class Main {
public static void main(String[] args) throws Exception {
/*
* Parse a JSON String and convert it to CSV
*/
List<Map<String, String>> flatJson = JSONFlattener.parseJson(jsonString());
// Using the default separator ','
CSVWriter.writeToFile(CSVWriter.getCSV(flatJson), "files/sample_string.csv");
/*
* Parse a JSON File and convert it to CSV
*/
flatJson = JSONFlattener.parseJson(new File("files/simple.json"), "UTF-8");
// Using ';' as separator
CSVWriter.writeToFile(CSVWriter.getCSV(flatJson, ";"), "files/sample_file.csv");
/*
* Parse JSON from URL and convert it to CSV
*/
flatJson = JSONFlattener.parseJson(new URI("http://echo.jsontest.com/firstname/Brahim/lastName/Arkni"));
// Using '\t' as separator
CSVWriter.writeToFile(CSVWriter.getCSV(flatJson, "\t"), "files/sample_uri.csv");
/*
* Parse a Large JSON File and convert it to CSV
*/
flatJson = JSONFlattener.parseJson(new File("files/sample_large.json"), "UTF-8");
// Using ';' as separator
Set<String> header = CSVWriter.collectOrderedHeaders(flatJson);
// the intention is generate a csv file with specific headers - not all
CSVWriter.writeLargeFile(flatJson, ";", "files/sample_largeFile.csv", header);
}
private static String jsonString() {
return "[" +
" {" +
" \"studentName\": \"Foo\"," +
" \"Age\": \"12\"," +
" \"subjects\": [" +
" {" +
" \"name\": \"English\"," +
" \"marks\": \"40\"" +
" }," +
" {" +
" \"name\": \"History\"," +
" \"marks\": \"50\"" +
" }" +
" ]" +
" }" +
"]";
}
}