Json string을 java List<Map<String, Object>>로 변경하기

Json string을 java List<Map<String, Object>>로 변경하기

* 필요한 라이브러리 

<!-- https://mvnrepository.com/artifact/org.codehaus.jackson/jackson-mapper-asl --> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.13</version> </dependency>

* 코드

package com.tistory.tazz009.test001; import java.io.IOException; import java.util.List; import java.util.Map; import org.apache.commons.collections.MapUtils; import org.codehaus.jackson.JsonParseException; import org.codehaus.jackson.map.JsonMappingException; import org.codehaus.jackson.map.ObjectMapper; import org.codehaus.jackson.type.TypeReference; public class JsonTest { @SuppressWarnings("unchecked") public static void main(String[] args) { String jsonStr = "[{\"name\":\"김씨\", \"friends\":[\"a\", \"b\"]},{\"name\":\"최씨\", \"friends\":[\"c\", \"d\"]}]"; ObjectMapper objectMapper = new ObjectMapper(); try { List<Map<String, Object>> readValue = objectMapper.readValue(jsonStr, new TypeReference<List<Map<String, Object>>>() { }); for (Map<String, Object> map : readValue) { MapUtils.debugPrint(System.out, "map", map); List<String> friends = (List<String>) map.get("friends"); for (String friend : friends) { System.out.println(friend); } } } catch (JsonParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (JsonMappingException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }