场景：

Json的字符串转对象，并且字符串的的属性是下划线，对象的属性是驼峰 ，用在对象中设置属性的方法实现。

方法：

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;public class JsonUtils {/*** 下划线转驼峰* @param json* @param clazz* @return* @param <T>* @throws Exception*/public static <T> T underscoreToCamelCaseJson(String json, Class<T> clazz) throws Exception {ObjectMapper mapper = new ObjectMapper();// 先将JSON字符串反序列化为JsonNodeJsonNode rootNode = mapper.readTree(json);// 深度拷贝JsonNode，避免直接修改导致的ConcurrentModificationExceptionObjectNode newNode = mapper.createObjectNode();Map<String, JsonNode> updates = new HashMap<>();// 遍历JSON节点，记录下划线转驼峰后的键值对Iterator<Map.Entry<String, JsonNode>> fields = rootNode.fields();while (fields.hasNext()) {Map.Entry<String, JsonNode> field = fields.next();String oldKey = field.getKey();String newKey = toCamelCase(oldKey);updates.put(newKey, field.getValue());}// 将更新应用于新的JsonNodefor (Map.Entry<String, JsonNode> entry : updates.entrySet()) {newNode.set(entry.getKey(), entry.getValue());}// 现在JSON的键已经是驼峰式命名了，可以直接反序列化为目标类return mapper.treeToValue(newNode, clazz);}}

@GetMapping("/test2")public R test2() throws Exception {String json = "{\n" +"        \"reg\": null,\n" +"        \"cpn\": null,\n" +"        \"name\": null,\n" +"        \"sn\": null,\n" +"        \"upic\": null,\n" +"        \"vin\": null,\n" +"        \"fcsn\": null,\n" +"        \"operation_type\": null,\n" +"        \"imsi\": null,\n" +"        \"product_id\": 0,\n" +"        \"pilot_id\": 0,\n" +"        \"hangar_id\": \"cc\",\n" +"        \"hangar_status\": 33\n" +"    }";try {DroneDeviceVO myObject = JsonUtils.underscoreToCamelCaseJson(json, DroneDeviceVO.class);log.info(myObject.getHangarId());log.info(""+myObject.getHangarStatus());return R.ok(myObject);} catch (Exception e) {e.printStackTrace();}return R.ok();}

@Datapublic class DroneDeviceVO {private String reg;private String cpn;private String name;private String sn;private String upic;private String vin;private String fcsn;private String operationType;private String imsi;private int productId;private int pilotId;private String hangarId;private int hangarStatus;}