add JSONOnject at the beginning of my old file JSON jackson java

Asked Mar 08 '17 at 12:23

Active May 29 '18 at 01:08

Viewed 84 times

I have already a json file, I don't want to create a new file. I need to add a jsonObject to this file using Jackson. This is how I did, but here I am creating a new file !

ObjectMapper mapper = new ObjectMapper();
File f = new File("/Users/sabrine/Documents/Workspace STS/Tache3.0/src/graph1.gjson");
mapper.writeValue(f, buildingGraph.graphMetadata);

How can I update my file with adding the object at the beginning of it?

edited May 29 '18 at 01:08

Cœur

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asked Mar 08 '17 at 12:23

Ben Mustapha Sabrine

Writing at the beginning of a file is usually not possible, see here: http://stackoverflow.com/a/6127706/7677308 – SilverNak Mar 08 '17 at 13:58
why can't you simply append the data from old file to this file at the end? – Coder Mar 08 '17 at 20:04
@Coder I was wondering if there is an other solution, but at the end this is wht I did – Ben Mustapha Sabrine Mar 09 '17 at 14:38

add JSONOnject at the beginning of my old file JSON jackson java

0 Answers0