可以拆分成下面这几个model

package ;
public class Delivery {
private String code;

private String status;

public void setCode(String code){
this.code = code;
}
public String getCode(){
return this.code;
}
public void setStatus(String status){
this.status = status;
}
public String getStatus(){
return this.status;
}

}

package ;
public class Origin {
private String value;

private String label;

private String url;

public void setValue(String value){
this.value = value;
}
public String getValue(){
return this.value;
}
public void setLabel(String label){
this.label = label;
}
public String getLabel(){
return this.label;
}
public void setUrl(String url){
this.url = url;
}
public String getUrl(){
return this.url;
}

}

package ;
public class Destination {
private String value;

private String label;

private String url;

public void setValue(String value){
this.value = value;
}
public String getValue(){
return this.value;
}
public void setLabel(String label){
this.label = label;
}
public String getLabel(){
return this.label;
}
public void setUrl(String url){
this.url = url;
}
public String getUrl(){
return this.url;
}

}

package ;
public class Link {
private String url;

private String label;

public void setUrl(String url){
this.url = url;
}
public String getUrl(){
return this.url;
}
public void setLabel(String label){
this.label = label;
}
public String getLabel(){
return this.label;
}

}

package ;
public class Signature {
private Link link;

private String type;

private String description;

private String signatory;

private String label;

private String help;

public void setLink(Link link){
this.link = link;
}
public Link getLink(){
return this.link;
}
public void setType(String type){
this.type = type;
}
public String getType(){
return this.type;
}
public void setDescription(String description){
this.description = description;
}
public String getDescription(){
return this.description;
}
public void setSignatory(String signatory){
this.signatory = signatory;
}
public String getSignatory(){
return this.signatory;
}
public void setLabel(String label){
this.label = label;
}
public String getLabel(){
return this.label;
}
public void setHelp(String help){
this.help = help;
}
public String getHelp(){
return this.help;
}

}

package ;
public class PIds {

}

package ;
import java.util.List;
public class Pieces {
private int value;

private String label;

private boolean showSummary;

private List pIds ;

public void setValue(int value){
this.value = value;
}
public int getValue(){
return this.value;
}
public void setLabel(String label){
this.label = label;
}
public String getLabel(){
return this.label;
}
public void setShowSummary(boolean showSummary){
this.showSummary = showSummary;
}
public boolean getShowSummary(){
return this.showSummary;
}
public void setPIds(List pIds){
this.pIds = pIds;
}
public List getPIds(){
return this.pIds;
}

}

package ;
public class Checkpoints {
private int counter;

private String description;

private String time;

private String date;

private String location;

public void setCounter(int counter){
this.counter = counter;
}
public int getCounter(){
return this.counter;
}
public void setDescription(String description){
this.description = description;
}
public String getDescription(){
return this.description;
}
public void setTime(String time){
this.time = time;
}
public String getTime(){
return this.time;
}
public void setDate(String date){
this.date = date;
}
public String getDate(){
return this.date;
}
public void setLocation(String location){
this.location = location;
}
public String getLocation(){
return this.location;
}

}

package ;
import java.util.List;
public class Results {
private String id;

private String label;

private String type;

private boolean duplicate;

private Delivery delivery;

private Origin origin;

private Destination destination;

private String description;

private boolean hasDuplicateShipment;

private Signature signature;

private Pieces pieces;

private List checkpoints ;

private String checkpointLocationLabel;

private String checkpointTimeLabel;

public void setId(String id){
this.id = id;
}
public String getId(){
return this.id;
}
public void setLabel(String label){
this.label = label;
}
public String getLabel(){
return this.label;
}
public void setType(String type){
this.type = type;
}
public String getType(){
return this.type;
}
public void setDuplicate(boolean duplicate){
this.duplicate = duplicate;
}
public boolean getDuplicate(){
return this.duplicate;
}
public void setDelivery(Delivery delivery){
this.delivery = delivery;
}
public Delivery getDelivery(){
return this.delivery;
}
public void setOrigin(Origin origin){
this.origin = origin;
}
public Origin getOrigin(){
return this.origin;
}
public void setDestination(Destination destination){
this.destination = destination;
}
public Destination getDestination(){
return this.destination;
}
public void setDescription(String description){
this.description = description;
}
public String getDescription(){
return this.description;
}
public void setHasDuplicateShipment(boolean hasDuplicateShipment){
this.hasDuplicateShipment = hasDuplicateShipment;
}
public boolean getHasDuplicateShipment(){
return this.hasDuplicateShipment;
}
public void setSignature(Signature signature){
this.signature = signature;
}
public Signature getSignature(){
return this.signature;
}
public void setPieces(Pieces pieces){
this.pieces = pieces;
}
public Pieces getPieces(){
return this.pieces;
}
public void setCheckpoints(List checkpoints){
this.checkpoints = checkpoints;
}
public List getCheckpoints(){
return this.checkpoints;
}
public void setCheckpointLocationLabel(String checkpointLocationLabel){
this.checkpointLocationLabel = checkpointLocationLabel;
}
public String getCheckpointLocationLabel(){
return this.checkpointLocationLabel;
}
public void setCheckpointTimeLabel(String checkpointTimeLabel){
this.checkpointTimeLabel = checkpointTimeLabel;
}
public String getCheckpointTimeLabel(){
return this.checkpointTimeLabel;
}

}

package ;
import java.util.List;
public class Root {
private List results ;

public void setResults(List results){
this.results = results;
}
public List getResults(){
return this.results;
}

}

解析的时候使用Gson的jar包
Gson gson = new Gson();
Result result = gson.fromJson(result,Result.class);

最后给你几个json转java文件的链接：
http://www.bejson.com/json2javapojo/
http://www.jsonschema2pojo.org/