Snack3 3.1.10的新特性及应用

<dependency>
  <groupId>org.noear</groupId>
  <artifactId>snack3</artifactId>
  <version>3.1.10</version>
</dependency>

（一）增加特性：Feature.StringJsonToNode

//注意：data 的值是个 string
String json = "{id:1,name:'x', data:'{user_id:6}'}";
ONode oNode = ONode.loadStr(json, Feature.StringJsonToNode);
int user_id = oNode.get("data").get("user_id").getInt();
//或用Jsonpath: int user_id = oNode.select("data.user_id").getInt();
//assert user_id == 6;

（二）增加接口：ONode::fillObj()，ONode::fillStr()

String json = "{id:1,name:'x', data:{user_id:6,icon:'fa1',type:2}}";
ONode oNode = ONode.loadStr(json);
//用新的 Json string 填充 data 的内容
oNode.get("data").fillStr("{user_id:8,mobile:'123'}");
int user_id = oNode.get("data").get("user_id").getInt();
//assert user_id == 8;

（三）增强接口：ONode::set(key, obj)，ONode::val(obj)

List<Object> list = new ArrayList<>();
list.add(1);
list.add("a");
Map<String,Object> map = new LinkedHashMap<>();
map.put("k1",1);
map.put("k2","a");
ONode oNode = new ONode();
oNode.set("map", map);
oNode.set("list",list);
oNode.get("list2").val(list);