Question

I am leaning Java.

I have to transfer a Hashmap to Server using rpc.

HashMap

Map<String, String> testMap = new HashMap<String, String>();
testMap .put("1", "abc");
testMap .put("2", "ezc");
testMap .put("3", "afc");
testMap .put("4", "cvc");
..

how to do that.

Answer 1

See this link if its helps..

http://www.mkyong.com/java/how-to-convert-java-map-to-from-json-jackson/

import com.fasterxml.jackson.databind.ObjectMapper;

ObjectMapper mapper = new ObjectMapper();
Map<String, String> testMap = new HashMap<String, String>(); 
testMap .put("1", "abc"); 
testMap .put("2", "ezc"); 
testMap .put("3", "afc"); 
testMap .put("4", "cvc"); 

      mapper.writeValue(new File("c:\\user.json"), testMap);