This library converts JSON documents to CSV.
It uses google-gson and JsonPath for conversion.
Click here for a quick evaluation.
Dependency for Maven.
<dependency>
<groupId>com.github.opendevl</groupId>
<artifactId>json2flat</artifactId>
<version>1.0.3</version>
</dependency>String str = new String(Files.readAllBytes(Paths.get("/path/to/source/file.json")));
JFlat flatMe = new JFlat(str);
//get the 2D representation of JSON document
List<Object[]> json2csv = flatMe.json2Sheet().getJsonAsSheet();
//write the 2D representation in csv format
flatMe.write2csv("/path/to/destination/file.json");OR
String str = new String(Files.readAllBytes(Paths.get("/path/to/source/file.json")));
JFlat flatMe = new JFlat(str);
//directly write the JSON document to CSV
flatMe.json2Sheet().write2csv("/path/to/destination/file.json");
//directly write the JSON document to CSV but with delimiter
flatMe.json2Sheet().write2csv("/path/to/destination/file.json", '|');{
"store": {
"book": [
{
"name":"dasd",
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95,
"marks" : [3,99,89]
},
{
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99,
"marks" : [3,99,89,34,67567]
},
{
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99,
"marks" : [3,99,89]
},
{
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99,
"marks" : []
}
]
}
}| /store/book/name | /store/book/category | /store/book/author | /store/book/title | /store/book/price | /store/book/marks/0 | /store/book/marks/1 | /store/book/marks/2 | /store/book/marks/3 | /store/book/marks/4 | /store/book/isbn |
|---|---|---|---|---|---|---|---|---|---|---|
| dasd | reference | Nigel Rees | Sayings of the Century | 8.95 | 3 | 99 | 89 | |||
| fiction | Evelyn Waugh | Sword of Honour | 12.99 | 3 | 99 | 89 | 34 | 67567 | ||
| fiction | Herman Melville | Moby Dick | 8.99 | 3 | 99 | 89 | 0-553-21311-3 | |||
| fiction | J. R. R. Tolkien | The Lord of the Rings | 22.99 | 0-395-19395-8 |
If you want to remove the "/" from header name then use the headerSeparator() function e.g.
To change /store/book/name to store book name
flatMe.json2Sheet().headerSeparator().write2csv("/path/to/destination/file.json");
To change /store/book/name to store_book_name
flatMe.json2Sheet().headerSeparator("_").write2csv("/path/to/destination/file.json");
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