{
"userType": "I",
"classList": [
{
"id": 1,
"name": "c1"
},
{
"id": 2,
"name": "c2"
},
{
"id": 3,
"name": "c3"
}
]
}
How to declare and put values to the above sample example?
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2Please tell us what you want the map to look like. It's not clear to me what you're expecting.ajb– ajb2017-03-20 03:16:08 +00:00Commented Mar 20, 2017 at 3:16
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3 Answers
Use jackson library,
HashMap<String,Object> map =
new ObjectMapper().readValue(jsonString, HashMap.class);
Use this dependency for maven,
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.8.7</version>
</dependency>
Comments
More here, do your researchs Create Map in Java.
Map<String,Object> map = new LinkedHashMap<String,Object>();
map.put("id",3);
map.put("name","c2");
Comments
You need to create a Map, and put a map and List into the first Map:
public Map<String, Object> createMap() {
Map<String, Object> map = new HashMap<String, Object>();
map.put("userType", "I");
List<Map<String, Object>> classList = new ArrayList<Map<String, Object>>();
Map<String, Object> class1 = new HashMap<String, Object>();
class1.put("id", 1);
class1.put("name", "c1");
classList.add(class1);
Map<String, Object> class2 = new HashMap<String, Object>();
class1.put("id", 2);
class1.put("name", "c2");
classList.add(class2);
Map<String, Object> class3 = new HashMap<String, Object>();
class1.put("id", 3);
class1.put("name", "c3");
classList.add(class3);
map.put("classList", classList);
return map;
}
Comments
