获取复杂对象中所有字段和值

超、凢脫俗 2023-01-20 09:45 202阅读 0赞

import com.fasterxml.jackson.core.JsonProcessingException;
    import com.fasterxml.jackson.databind.JsonNode;
    import com.fasterxml.jackson.databind.ObjectMapper;
    import org.apache.commons.collections4.MultiValuedMap;
    import org.apache.commons.collections4.multimap.ArrayListValuedHashMap;
    
    import java.util.Iterator;
    import java.util.Map;
    
    /** * 获取复杂对象中 所有字段 和值 * <code> * { * "displayName":"wqwqwq", * "mobile":"19978945612", * "position":"", * "sex":0, * "idCardNo":"", * "image":"", * "country":"1002", * "secretLevel":"4", * "birthday":1619193600000, * "nationality":"21", * "workNo":"wqqwqwwq", * "type":"3", * "userEmail":"11@163.com", * "swUserOfficePhone":"wqwqqw", * "maritalStatus":"0", * "certificateCn":"yttttttt", * "status":2000, * "jobInfo":{ * "companyJobInfo":{ * "orgId":"28953882975739904", * "orgName":"", * "email":"", * "secretLevel":"", * "officeAddress":"67878787", * "jobLevel":"qwwqwq", * "userOfficePhone":"" * }, * "userJobList":[ * { * "orgId":"73534012313059328", * "showOrder":78, * "orgNo":"213", * "job":"qwwwwwwww", * "position":"看了看", * "jobAttribute":"发的" * } * ] * } * } * </code> * * @author Created by niugang on 2021-04-25 15:14 */
    public class GetObjectField { 
        public static void main(String[] args) throws JsonProcessingException { 
            //使用apache ArrayListValuedHashMap 防止 key重复 ，如果是标准对象 在属性定义时
            //会避免属性名重复的
            MultiValuedMap<String, Object> hashMap = new ArrayListValuedHashMap<>();
            ObjectMapper objectMapper = new ObjectMapper();
            String aa = "{\"displayName\":\"wqwqwq\",\"mobile\":\"19978945612\",\"position\":\"\",\"sex\":0,\"idCardNo\":\"\",\"image\":\"\",\"country\":\"1002\",\"secretLevel\":\"4\",\"birthday\":1619193600000,\"nationality\":\"21\",\"workNo\":\"wqqwqwwq\",\"type\":\"3\",\"userEmail\":\"11@163.com\",\"swUserOfficePhone\":\"wqwqqw\",\"maritalStatus\":\"0\",\"certificateCn\":\"yttttttt\",\"status\":2000,\"jobInfo\":{\"companyJobInfo\":{\"orgId\":\"28953882975739904\",\"orgName\":\"\",\"email\":\"\",\"secretLevel\":\"\",\"officeAddress\":\"67878787\",\"jobLevel\":\"qwwqwq\",\"userOfficePhone\":\"\"},\"userJobList\":[{\"orgId\":\"73534012313059328\",\"showOrder\":78,\"orgNo\":\"213\",\"job\":\"qwwwwwwww\",\"position\":\"看了看\",\"jobAttribute\":\"发的\"}]}}";
            JsonNode jsonNode = objectMapper.readTree(aa);
            recursiveProcessing(jsonNode, hashMap);
            System.out.println(hashMap);
            System.out.println(hashMap.size());
    
        }
    
        /** * 递归遍历 * * @param jsonNode jsonNode * @param hashMap hashMap */
        public static void recursiveProcessing(JsonNode jsonNode, MultiValuedMap<String, Object> hashMap) { 
            Iterator<Map.Entry<String, JsonNode>> fields = jsonNode.fields();
            while (fields.hasNext()) { 
                Map.Entry<String, JsonNode> next = fields.next();
                String key = next.getKey();
                JsonNode value = next.getValue();
                if (value.isObject()) { 
                    recursiveProcessing(value, hashMap);
                } else if (value.isArray()) { 
                    for (JsonNode node : value) { 
                        recursiveProcessing(node, hashMap);
                    }
                } else { 
                      if (value.isNull()) { 
                            hashMap.put(key, null);
                        } else { 
                            if (value.isLong()) { 
                                hashMap.put(key, value.asLong());
                            } else if (value.isInt()) { 
                                hashMap.put(key, value.asInt());
                            } else if (value.isBoolean()) { 
                                hashMap.put(key, value.asBoolean());
                            } else if (value.isBigDecimal()) { 
                                hashMap.put(key, value.decimalValue());
                            } else if (value.isDouble()) { 
                                hashMap.put(key, value.doubleValue());
                            } else if (value.isFloat()) { 
                                hashMap.put(key, value.floatValue());
                            } else if (value.isBigInteger()) { 
                                hashMap.put(key, value.bigIntegerValue());
                            } else { 
                                hashMap.put(key, value.asText());
                            }
                        }
                }
            }
        }
    }

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