importcom.fasterxml.jackson.core.JsonProcessingException;importcom.fasterxml.jackson.databind.ObjectMapper;importjava.util.HashMap;importjava.util.Map;publicclassMapToJsonStringExample{publicstaticvoidmain(String[]args){// 步骤1:创建一个Map对象并填充键值对Map<String,Object>map=newHashMap<>();map.put("...
String>map=newHashMap<>();map.put("name","John Doe");map.put("age","30");map.put("city","New York");// 使用Gson库将Map转换为JSON字符串Gsongson=newGson();StringjsonString=gson.toJson(map);System.out.println("JSON结果: "+jsonString);}}...
System.out.println("source: "+ map.toString()); // map转换成jsonString String jsonStr = JSON.toJSONString(map); System.out.println("jsonStr: "+ jsonStr); // jsonString转换成Map Map<String, String> jsonMap = JSON.parseObject(jsonStr,newTypeReference<HashMap<String, String>>() { });...
System.out.println("mapToString=>"+jsonString);//2.map转jsonObjectJSONObject JSONObj =JSONObject.parseObject(JSON.toJSONString(map)); System.out.println("mapToJSON=>"+JSONObj);//3.String转jsonObjectString jsonString2 = "{\"AAA\":\"1\",\"CCC\":\"3\",\"BBB\":\"2\"}"; JSON...
import com.google.gson.Gson; public class MapToJson { public static void main(String[] args) { Gson gson = new Gson(); Map<String, Object> map = new HashMap<>(); map.put("key1", "value1"); map.put("key2", 123); String json = gson.toJson(map); System.out.println(json)...
json转map publicvoida2(){Stringstr="{\"颜色\":\"红\",\"大小\":\"128\",\"price\":\"11\",\"stock_num\":\"22\"}";//第一种方式Mapmaps=(Map)JSON.parse(str);System.out.println("方式1: JSON类来解析JSON字符串");maps.forEach((k,v)->{System.out.println("k:"+k+"v:"+v...
虽然不清楚您的问题到底是什么，但示例中的主要内容是将String对象序列化为JSON。这就是为什么你会得到...
将文件反序列化为 Java 对象 ObjectMapper mapper=newObjectMapper();//对象转json字符串User user=newUser("singleZhang",18);String userJson=mapper.writeValueAsString(user);//Map转json字符串Map map=newHashMap();String json=mapper.writeValueAsString(map);//数组list转json字符串User[]userArr={user1...
public JsonMap(Map<String,?> map) Construct a JsonMap with the same mappings as the given map. Parameters: map - the map whose mappings are to be placed in this map. Method Detail instantiateMap protected Map<String,Object> instantiateMap() Description copied from class: com.oracle....
Methods inherited from interface java.lang.Comparable compareToMethod Detail getDefinition MapDef getDefinition() Returns the MapDef that defines the content of this map. Returns: the MapDef size int size() Returns the size of the map. Returns: the size remove FieldValue remove(String fieldName)...