java JSONNOCT删除中间的一个容器
我有一个关于以下Json的问题java JSONNOCT删除中间的一个容器,java,jackson,jackson-databind,Java,Jackson,Jackson Databind,我有一个关于以下Json的问题 { "Parent": { "pk1": "pv1", "pk2": "pv2", "Child": { "*": { "ck1": "cv1", "ck2": "cv2" } } } } 现在我想删除*:{},但保留其内容。预期输出如下所示 { "Parent":
{
"Parent": {
"pk1": "pv1",
"pk2": "pv2",
"Child": {
"*": {
"ck1": "cv1",
"ck2": "cv2"
}
}
}
}
现在我想删除*:{},但保留其内容。预期输出如下所示
{
"Parent": {
"pk1": "pv1",
"pk2": "pv2",
"Child": {
"ck1": "cv1",
"ck2": "cv2"
}
}
}
如何使用Java Jackson实现这一点?请参见下面的操作
ObjectMapper mapper = new ObjectMapper();
String file = "src/main/resources/yourjson.json";
JsonNode object = mapper.readTree(new File(file));
ObjectNode child = (ObjectNode) object.path("Parent").path("Child");
JsonNode star = child.path("*");
child.remove("*");
Iterator<String> startFieldNames = star.fieldNames();
while (startFieldNames.hasNext()) {
String startFieldName = startFieldNames.next();
child.set(startFieldName, star.get(startFieldName));
}
System.out.println(mapper.writer().withDefaultPrettyPrinter().writeValueAsString(object));