Question

<div class="container valign-transform">
    <div class="row">
        <div class="col-sm-12">
            <h4>Text</h4>
        </div>
    </div> 
 </div>

.vertical-center {
    position: relative;
    top: 50%;
    z-index: 2;
    -webkit-transform: translateY(-50%);
    transform: translateY(-50%);
}

嘿，如果用户输入版本号，则从代码中创建一个JSON，它不应该在root jsonobject中添加。所以如何限制它。

Scanner input = new Scanner(System.in);
JSONArray finaljson = new JSONArray();
for (int j = 0; j < 2; j++) {
    System.out.println("Enter Version Name");
    String vName = input.next();
    System.out.println("Enter Version Key");
    ;
    String vKey = input.next();
    JSONObject root = new JSONObject();
    if (!root.has("versionName")) {
        root.put("versionName", vName);
        root.put("versionKey", vKey);
    }

    JSONArray issue = new JSONArray();
    System.out.println("Enter Epic Name");
    String epicName = input.next();

    System.out.println("Enter Epic Key");
    String epicKey = input.next();
    JSONObject epicData = new JSONObject();
    epicData.put("epickKey", epicKey);
    epicData.put("epickName", epicName);
    issue.put(epicData);

    root.put("issue", issue);
    finaljson.put(root);
}

System.out.println("JSON DATA" + finaljson.toString());

但想要

[
    {
        "versionKey": "vkey1",
        "issue": [
            {
                "epickName": "e1",
                "epickKey": "ekey1"
            }
        ],
        "versionName": "v1"
    },
    {
        "versionKey": "vkey1",
        "issue": [
            {
                "epickName": "e2",
                "epickKey": "eky2"
            }
        ],
        "versionName": "v1"
    }
]

你能帮助我如何制作这种类型的动态json数据

Answer 1

如果我理解正确，您希望输出类似于您问题中的第二个JSON数组。改变循环的位置应该可以解决问题：

Scanner input = new Scanner(System.in);
JSONArray finaljson = new JSONArray();

System.out.println("Enter Version Name");
String vName = input.next();
System.out.println("Enter Version Key");;
String vKey = input.next();
JSONObject root = new JSONObject();
if (!root.has("versionName")) {
    root.put("versionName", vName);
    root.put("versionKey", vKey);
}

JSONArray issue = new JSONArray();
for (int j = 0; j < 2; j++) {
    System.out.println("Enter Epic Name");
    String epicName = input.next();

    System.out.println("Enter Epic Key");
    String epicKey = input.next();
    JSONObject epicData = new JSONObject();
    epicData.put("epickKey", epicKey);
    epicData.put("epickName", epicName);
    issue.put(epicData);
}

root.put("issue", issue);
finaljson.put(root);

System.out.println("JSON DATA" + finaljson.toString());

我测试了你的输入。这是格式化的JSON输出：

[
    {
        "issue": [
            {
                "epickKey": "eky1",
                "epickName": "e1"
            },
            {
                "epickKey": "eky2",
                "epickName": "e2"
            }
        ],
        "versionName": "vkey1",
        "versionKey": "v1"
    }
]

Answer 2

我更改了你的代码并添加了另外两个类。一个名为Data for（versionKey，nameKey），第二个名为Epic for（epickName，epickKey）并生成Json，我使用Gson lib。这段代码：

史诗类：

public class Epic {

    private String epicName;
    private String epicKey;

    public Epic() {

    }

    public Epic(String epicName, String epicKey) {  
        this.epicName = epicName;
        this.epicKey = epicKey;
    }

    public String getEpicName() {
        return epicName;
    }
    public void setEpicName(String epicName) {
        this.epicName = epicName;
    }
    public String getEpicKey() {
        return epicKey;
    }
    public void setEpicKey(String epicKey) {
        this.epicKey = epicKey;
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append("Epic [epicName=");
        builder.append(epicName);
        builder.append(", epicKey=");
        builder.append(epicKey);
        builder.append("]");
        return builder.toString();
    }

}

数据类：

import java.util.List;


public class Data {

    private String versionName;
    private String versionKey;
    private List<Epic> epics;

    public Data() {

    }

    public Data(String versionName, String versionKey, List<Epic> epics) {  
        this.versionName = versionName;
        this.versionKey = versionKey;
        this.epics = epics;
    }

    public String getVersionName() {
        return versionName;
    }
    public void setVersionName(String versionName) {
        this.versionName = versionName;
    }
    public String getVersionKey() {
        return versionKey;
    }
    public void setVersionKey(String versionKey) {
        this.versionKey = versionKey;
    }
    public List<Epic> getEpics() {
        return epics;
    }
    public void setEpics(List<Epic> epics) {
        this.epics = epics;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result
                + ((versionKey == null) ? 0 : versionKey.hashCode());
        result = prime * result
                + ((versionName == null) ? 0 : versionName.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Data other = (Data) obj;
        if (versionKey == null) {
            if (other.versionKey != null)
                return false;
        } else if (!versionKey.equals(other.versionKey))
            return false;
        if (versionName == null) {
            if (other.versionName != null)
                return false;
        } else if (!versionName.equals(other.versionName))
            return false;
        return true;
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append("Data [versionName=");
        builder.append(versionName);
        builder.append(", versionKey=");
        builder.append(versionKey);
        builder.append(", epics=");
        builder.append(epics);
        builder.append("]");
        return builder.toString();
    }
}

主类：

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

public class Main {


    public static  void main(String[] args) {
        Scanner input = new Scanner(System.in);
        List<Data> datas = new ArrayList<Data>();
        boolean add = false;
        for (int j = 0; j < 2; j++) {
            add = false;
            Data data = new Data();
            System.out.println("Enter Version Name");
            data.setVersionName(input.next());
            System.out.println("Enter Version Key");
            data.setVersionKey(input.next());

            Epic epic = new Epic();
            System.out.println("Enter Epic Name");
            epic.setEpicName(input.next());
            System.out.println("Enter Epic Key");
            epic.setEpicKey(input.next());

            List<Epic> epics = new ArrayList<Epic>();
            if(datas.isEmpty()){

                epics.add(epic);
                data.setEpics(epics);
                datas.add(data);
            }else{
                for(Data d:datas){
                    if(d.equals(data)){
                        d.getEpics().add(epic);
                        add=true;
                    }
                }
                if(!add){
                    epics.add(epic);
                    data.setEpics(epics);
                    datas.add(data);
                }
            }

        }
        //Gson gson = new GsonBuilder().setPrettyPrinting().create();
        //System.out.println(gson.toJson(datas));
        JSONArray jsonArray = (JSONArray) JSONSerializer.toJSON(datas);  
        System.out.println(jsonArray.toString());



    }

}

PS：要下载Gson API

的网址

修改

我在Main Class中进行了更改以使用json-lib-2.4-jdk15.jar 看看这个网址： json-lib

Answer 3

使用Gson读取你的json：

为您的Json对象定义Pojos：

public class Epic {
    String versionKey, versionName;
    Issue issue;
}

public class Issue{
    String epicName, epicKey;
}

使用Gson从json加载Pojos

// Create gson object
Gson gson = new GsonBuilder().create();

// Load your json objects:
BufferedReader br = new BufferedReader(new FileReader("file.json"));  
List<Epic> epics = gson.fromJson(br, new TypeToken<ArrayList<Epic>>() {}.getType());

为“多个问题 - 史诗”创建所需的类结构：

// This will be used to store in the format you want
public class MultiIssueEpic{
    public String versionKey, versionName;
    public Set<Issue> issueSet;

    public MultiIssueEpic(Epic epic){
        this.versionName = epic.versionName;
        this.versionKey = epic.versionKey;
        this.issueSet = new HashSet<>();
        this.issueSet.add(epic.issue);
    }
}

从MultiIssueEpic：

构建List<Epic>

Map<String, MultiIssueEpic> epicMap = new HashMap<>();
for(Epic epic : epics){
    if(epicMap.contains(epic.versionName)){
        // Add issue to existing MultiIssueEpic
        epicMap.get(epic.versionName).issueSet.add(epic.issue);
    } else{
        // Add new MultiIssueEpic
        epicMap.put(epic.versionName, new MultiIssueEpic(epic));
    }
}

// Here is your list of MultiIssueEpics:
List<MultiIssueEpic> multiIssueEpics = new ArrayList<>(epicMap.values());

如果重复JSON对象，则不应添加

3 个答案: