java多层嵌套集合的json,如何获取多层集合中所需要的value
就很简单的一个问题折磨了整整一天,好在压抑的心情终于释放了,终于闲下来觉得是不是应该记录一下。
首先这个json串是从外网接口返回的数据,想要了解的朋友们可以复制到json解析器中看一下格式:https://www.json.cn/#
- {"status":"True","biz_result":[{"PartyFunctionCode":"NBEPORT","PartyIdentifier":"container","PartyName":"宁波电子口岸","ManifestInfo":[{"LadingBillNumber":"COSU6224023460B","ShippingCompanyName":"","VesselNameCode":"COSCO YINGKOU","VesselName":"COSCO YINGKOU","PlaceOfLoading":"","PlaceOfDischarge":"","VoyageNumber":"130W","DirectionCode":"","VesselCallNumber":"","IMONumber":""}],"ContainerInfo":[{"ContainerNumber":"FCIU9840537","ContainerOperator":"COS","SealNumber":"11374417","CodeOfSizeAndType":"","ContainerLoadingStatusCode":"","ContainerTareWeight":"0","TransportMeansType":"","VehicleNumber":"","ContainerStatusInformation":[{"ImExIdentifier":"","TransportStatusCode":"码头已经放行","TransportStatusNameEN":"","DateOrTimeOrPeriod":"2019-10-25 17:34:49","TimeZoneIdentifier":"PRC","PlaceLocationQualifier":"NBEPORT","PlaceOrLocationIdentification":"","PlaceOrLocation":"","Remark":"宁波电子口岸","Status":"DOCKPASS","EventName":""},{"ImExIdentifier":"E","TransportStatusCode":"重箱进港","TransportStatusNameEN":"","DateOrTimeOrPeriod":"2019-10-24 13:29:00","TimeZoneIdentifier":"PRC","PlaceLocationQualifier":"NBEPORT","PlaceOrLocationIdentification":"BLCT3","PlaceOrLocation":"北仑四期码头","Remark":"宁波电子口岸","Status":"INOUT","EventName":"进港"},{"ImExIdentifier":"E","TransportStatusCode":"海关放行","TransportStatusNameEN":"","DateOrTimeOrPeriod":"2019-10-25 11:04:37","TimeZoneIdentifier":"PRC","PlaceLocationQualifier":"NBEPORT","PlaceOrLocationIdentification":"","PlaceOrLocation":"","Remark":"宁波电子口岸","Status":"CUSPASS","EventName":"海关放行"},{"ImExIdentifier":"","TransportStatusCode":"27301 装载舱单数据传输成功。","TransportStatusNameEN":"","DateOrTimeOrPeriod":"2019-10-31 13:44:41","TimeZoneIdentifier":"PRC","PlaceLocationQualifier":"NBEPORT","PlaceOrLocationIdentification":"","PlaceOrLocation":"","Remark":"宁波电子口岸","Status":"MFT","EventName":"装载舱单"},{"ImExIdentifier":"E","TransportStatusCode":"重箱装船","TransportStatusNameEN":"","DateOrTimeOrPeriod":"2019-11-01 16:13:00","TimeZoneIdentifier":"PRC","PlaceLocationQualifier":"NBEPORT","PlaceOrLocationIdentification":"BLCT3","PlaceOrLocation":"北仑四期码头","Remark":"宁波电子口岸","Status":"LOAD","EventName":"装船"},{"ImExIdentifier":"","TransportStatusCode":"开船","TransportStatusNameEN":"","DateOrTimeOrPeriod":"2019-11-01 22:00:00","TimeZoneIdentifier":"PRC","PlaceLocationQualifier":"NBEPORT","PlaceOrLocationIdentification":"BLCT3","PlaceOrLocation":"北仑四期码头","Remark":"宁波电子口岸","Status":"BERTH","EventName":"离港"}]}]},{"PartyFunctionCode":"NBEPORT","PartyIdentifier":"container","PartyName":"宁波电子口岸","ManifestInfo":[{"LadingBillNumber":"COSU6224023460A","ShippingCompanyName":"","VesselNameCode":"COSCO YINGKOU","VesselName":"COSCO YINGKOU","PlaceOfLoading":"","PlaceOfDischarge":"","VoyageNumber":"130W","DirectionCode":"","VesselCallNumber":"","IMONumber":""}],"ContainerInfo":[{"ContainerNumber":"FCIU9840537","ContainerOperator":"COS","SealNumber":"11374417","CodeOfSizeAndType":"","ContainerLoadingStatusCode":"","ContainerTareWeight":"0","TransportMeansType":"","VehicleNumber":"","ContainerStatusInformation":[{"ImExIdentifier":"","TransportStatusCode":"码头已经放行","TransportStatusNameEN":"","DateOrTimeOrPeriod":"2019-10-25 17:34:49","TimeZoneIdentifier":"PRC","PlaceLocationQualifier":"NBEPORT","PlaceOrLocationIdentification":"","PlaceOrLocation":"","Remark":"宁波电子口岸","Status":"DOCKPASS","EventName":""},{"ImExIdentifier":"E","TransportStatusCode":"重箱进港","TransportStatusNameEN":"","DateOrTimeOrPeriod":"2019-10-24 13:29:00","TimeZoneIdentifier":"PRC","PlaceLocationQualifier":"NBEPORT","PlaceOrLocationIdentification":"BLCT3","PlaceOrLocation":"北仑四期码头","Remark":"宁波电子口岸","Status":"INOUT","EventName":"进港"},{"ImExIdentifier":"E","TransportStatusCode":"海关放行","TransportStatusNameEN":"","DateOrTimeOrPeriod":"2019-10-25 11:04:27","TimeZoneIdentifier":"PRC","PlaceLocationQualifier":"NBEPORT","PlaceOrLocationIdentification":"","PlaceOrLocation":"","Remark":"宁波电子口岸","Status":"CUSPASS","EventName":"海关放行"},{"ImExIdentifier":"","TransportStatusCode":"27301 装载舱单数据传输成功。","TransportStatusNameEN":"","DateOrTimeOrPeriod":"2019-10-31 13:44:41","TimeZoneIdentifier":"PRC","PlaceLocationQualifier":"NBEPORT","PlaceOrLocationIdentification":"","PlaceOrLocation":"","Remark":"宁波电子口岸","Status":"MFT","EventName":"装载舱单"},{"ImExIdentifier":"E","TransportStatusCode":"重箱装船","TransportStatusNameEN":"","DateOrTimeOrPeriod":"2019-11-01 16:13:00","TimeZoneIdentifier":"PRC","PlaceLocationQualifier":"NBEPORT","PlaceOrLocationIdentification":"BLCT3","PlaceOrLocation":"北仑四期码头","Remark":"宁波电子口岸","Status":"LOAD","EventName":"装船"}]}]}],"error":""}
Json串
期间用了alibab的fastjson包想要一层一层剥开这个json,结果浪费了许多时间还是没有效果,估计是方法使用错了,这里就直接贴上成功的方法。
首先还是先建了实体类,这里比较简单,就是按照json的格式一层一层往下写,就直接贴代码了。(getset和构造器我就不贴了,有点太占空间了)
- import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
- import java.io.Serializable;
- import java.util.List;
- @JsonIgnoreProperties(ignoreUnknown = true)
- @SuppressWarnings("serial")
- public class Result implements Serializable {
- private String status;
- private List<biz_result> biz_result;
- private String error;
- import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
- import java.io.Serializable;
- import java.util.List;
- @JsonIgnoreProperties(ignoreUnknown = true)
- @SuppressWarnings("serial")
- public class biz_result implements Serializable {
- private String PartyFunctionCode;
- private String PartyIdentifier;
- private String PartyName;
- private List<ManifestInfo> ManifestInfo ;
- private List<ContainerInfo> ContainerInfo ;
- import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
- import java.io.Serializable;
- @JsonIgnoreProperties(ignoreUnknown = true)
- @SuppressWarnings("serial")
- public class ManifestInfo implements Serializable {
- private String LadingBillNumber;
- private String ShippingCompanyName;
- private String VesselNameCode;
- private String VesselName;
- private String PlaceOfLoading;
- private String PlaceOfDischarge;
- private String VoyageNumber;
- private String DirectionCode;
- private String VesselCallNumber;
- private String IMONumber;
- import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
- import java.io.Serializable;
- import java.util.List;
- @JsonIgnoreProperties(ignoreUnknown = true)
- @SuppressWarnings("serial")
- public class ContainerInfo implements Serializable {
- private String ContainerNumber;
- private String ContainerOperator;
- private String SealNumber;
- private String CodeOfSizeAndType;
- private String ContainerLoadingStatusCode;
- private String ContainerTareWeight;
- private String TransportMeansType;
- private String VehicleNumber;
- private List<ContainerStatusInformation> ContainerStatusInformation ;
- import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
- import java.io.Serializable;
- @JsonIgnoreProperties(ignoreUnknown = true)
- @SuppressWarnings("serial")
- public class ContainerStatusInformation implements Serializable {
- private String ImExIdentifier;
- private String TransportStatusCode;
- private String TransportStatusNameEN;
- private String DateOrTimeOrPeriod;
- private String TimeZoneIdentifier;
- private String PlaceLocationQualifier;
- private String PlaceOrLocationIdentification;
- private String PlaceOrLocation;
- private String Remark;
- private String Status;
- private String EventName;
才想起来要不要折叠一下,这会不会太长了,但是我实在太懒了,对不起我就不去重新操作了。
实体类建完以后我就尝试了一下,也不再使用alibab的fastjson,使用如下这个包:
- import net.sf.json.JSONObject;
maven依赖如下:
- <dependency>
- <groupId>net.sf.json-lib</groupId>
- <artifactId>json-lib</artifactId>
- <version>2.4</version>
- <classifier>jdk15</classifier>
- </dependency>
最终代码如下:
- import net.sf.json.JSONArray;
- import net.sf.json.JSONObject;
- public class Test02 {
- public static void main(String[]args){
- String json = "这是上面巨长的JSON";
- //得到json对象
- JSONObject jsonObject = JSONObject.fromObject(json);
- //获取其中的biz_result数组
- JSONArray biz_result = jsonObject.getJSONArray("biz_result");
- //获取数组中的某位元素
- String biz_resultString = biz_result.getString(0);
- //将数组中的这个数组再次转换成json对象
- JSONObject jsonObject1 = JSONObject.fromObject(biz_resultString);
- //通过getString获取value
- String manifestInfo = jsonObject1.getString("ManifestInfo");
- //去除首位中括号得到json格式
- String substring = manifestInfo.substring(1);
- String subString = substring.substring(0,substring.length()-1);
- //得到json格式以后再转换成json对象
- JSONObject jb3 = JSONObject.fromObject(subString);
- //得到需要的值。
- String vesselName = jb3.getString("VesselName");
- System.out.println(vesselName);
- }
- }
还是得养成写注释的习惯,要是不写注释贴上来,我自己都看着不舒服,最终得到了需要的数据:
- COSCO YINGKOU
1234567.
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