Question

{
  "type": "object",
  "properties": {
    "name": {
      "type": "string"
    },
    "id": {
      "type": "string"
    },
    "i": {
      "type": "integer"
    },
    "p": {
      "type": "object",
      "properties": {
        "name": {
          "type": "string"
        },
        "id": {
          "type": "string"
        },
        "i": {
          "type": "integer"
        },
        "p1": {
          "type": "object",
          "properties": {
            "name": {
              "type": "string"
            },
            "id": {
              "type": "string"
            },
            "i": {
              "type": "integer"
            }
          }
        }
      }
    }
  },
  "classname": "com.tibco.tea.agent.Person"
}

我是上面生成的架构，我想对其进行一些修改。如您所见，我已在此架构中嵌套了对象。我想插入＆＃34;类名＆＃34;每个对象的属性。任何人都可以建议我如何使用jackson 2.3.0遍历此模式并按上述方法对其进行操作。

Answer 1

如果节点是对象，您可以将它们转换为ObjectNode并使用put方法添加所需的键/值对。

JSON = // stuff you have in example
ObjectMapper mapper = new ObjectMapper();
JsonNode jsonNode = mapper.readTree(JSON);
// using root node for this example
if (jsonNode.isObject()) {
    ((ObjectNode) jsonNode).put("classname", "com.stackoverflow.Cheese");
}

Answer 2

这是我将类名放在生成的模式中的代码。此代码处理提供数组或非数组参数时的情况。即Person.class和Person [] .class可以成功处理。此代码无法处理仍在Jackson - https://github.com/FasterXML/jackson-databind/issues/339

上打开的自引用问题

下面的代码可以实例化如下 -

public static void main(String[] args) throws IOException {
        ObjectMapper mapper = new ObjectMapper();
        Class<?> cls = Person[].class;
        if(cls.isArray()){
            cls = cls.getComponentType();
        }
        String s = "{\"rootNode\":{\"classname\":\"" + cls.getName() + "\"},"
                + getAttributeClassnames(cls) + "}";
        s = s.replace("\",}", "\"}").replace("},}", "}}");
        System.out.println(s);
        s = mapper.generateJsonSchema(cls).getSchemaNode().put("type", "array")
                .put("classnames", s).toString();
        s = s.replace("\\", "").replace("\"{", "{").replace("}\"", "}");        
        System.out.println(s);
    }

static String getAttributeClassnames(Class<?> cls) {
    String s = "";      
        Field[] field = cls.getDeclaredFields();
        int i = 0;
        while (i < field.length) {              
            if (!(field[i].getType() == Boolean.class)
                    && !(field[i].getType() == Integer.class)
                    && !(field[i].getType() == Character.class)
                    && !(field[i].getType() == Byte.class)
                    && !(field[i].getType() == Short.class)
                    && !(field[i].getType() == Long.class)
                    && !(field[i].getType() == Float.class)
                    && !(field[i].getType() == Double.class)
                    && !(field[i].getType().isPrimitive())
                    && !(field[i].getType() == String.class)
                    && !(Collection.class.isAssignableFrom(field[i]
                            .getType()))
                    && !(Map.class.isAssignableFrom(field[i].getType()))
                    && !(Arrays.class.isAssignableFrom(field[i].getType()))) {
                if(field[i].getType() == cls){
                    if (i == field.length - 1) {
                        Class<?> name = null;
                        if(field[i].getType().isArray()){
                            name = field[i].getType().getComponentType();
                        }else{
                            name = field[i].getType();
                        }
                        s = s + "\"" + field[i].getName() + "\""
                                + ":{\"classname\":\""
                                + name.getName() + "\","
                                +"}";
                    } else {
                        Class<?> name = null;                       
                        if(field[i].getType().isArray()){
                            name = field[i].getType().getComponentType();
                        }else{
                            name = field[i].getType();
                        }
                        s = s + "\"" + field[i].getName() + "\""
                                + ":{\"classname\":\""
                                + name.getName() + "\","
                                + "}" + ",";
                    }

                }else{
                    if (i == field.length - 1) {
                        Class<?> name = null;
                        if(field[i].getType().isArray()){
                            name = field[i].getType().getComponentType();
                        }else{
                            name = field[i].getType();
                        }
                        s = s + "\"" + field[i].getName() + "\""
                                + ":{\"classname\":\""
                                + name.getName() + "\","
                                + getAttributeClassnames(name)
                                + "}";
                    } else {
                        Class<?> name = null;                       
                        if(field[i].getType().isArray()){
                            name = field[i].getType().getComponentType();
                        }else{
                            name = field[i].getType();
                        }
                        s = s + "\"" + field[i].getName() + "\""
                                + ":{\"classname\":\""
                                + name.getName() + "\","
                                + getAttributeClassnames(name)
                                + "}" + ",";
                    }
                }
            }
            i++;
        }
    return s;
}

如何使用jackson遍历生成的json模式并将自定义属性放在json模式中

2 个答案: