尝试在Android中使用此代码将JSON array存储到Couchbase，将其置于失败状态。请帮助您如何成功存储它以及如何迭代接收所有数据。查看Couchbase文档，但仍然卡住了。在我能够存储和接收之前，我是否必须将JSON array转换为对象？或者从API
private void storeLocalData() {
//COUCHBASE IMPLEMENTATION
// Create a manager
manager = null;
try {
manager = new Manager(new AndroidContext(getActivity()), Manager.DEFAULT_OPTIONS);
} catch (IOException e) {
e.printStackTrace();
}
// Create or open the database named 'saved_project_sample'
database = null;
try {
database = manager.getDatabase("saved_project_sample");
} catch (CouchbaseLiteException e) {
e.printStackTrace();
}
// Create a new document
document = database.createDocument();
try {
//Cast json String into JSON Array
JSONArray jsonArray= new JSONArray(json);
HashMap<String, Object> properties = new HashMap<>();
for (int k = 0; k < jsonArray.length(); k++) {
JSONObject objJson = jsonArray.getJSONObject(k);
Object id = objJson.getString("id");
Object title = objJson.getString("title");
Object owner_id = objJson.getString("owner_id");
Object description = objJson.getString("description");
Object status = objJson.getString("status");
Object start_time = objJson.getString("start_time");
Object finish_time = objJson.getString("finish_time");
Object created = objJson.getString("created");
Object modified = objJson.getString("modified");
properties.put("id", id);
properties.put("title", title);
properties.put("owner_id", owner_id);
properties.put("description", description);
properties.put("status", status);
properties.put("start_time", start_time);
properties.put("finish_time", finish_time);
properties.put("created", created);
properties.put("modified", modified);
document.putProperties(properties);
Toast.makeText(getActivity(), "Successful Storage", Toast.LENGTH_SHORT).show();
}
} catch (CouchbaseLiteException e) {
e.printStackTrace();
Toast.makeText(getActivity(), "Unsuccessful", Toast.LENGTH_SHORT).show();
} catch (JSONException e) {
e.printStackTrace();
Toast.makeText(getActivity(), "Unsuccessful", Toast.LENGTH_SHORT).show();
}
}
这是我的JSON数组
[
{
"id": "1",
"title": "New API",
"owner_id": "dsdssdsd445d",
"description": "Yh A Testin API",
"status": "unactiveAPI",
"start_time": "2017-08-01 14:25:22.060000",
"finish_time": "2017-08-01 14:25:22.060000",
"created": "2017-08-01 14:25:22.060000",
"modified": "2017-08-01 14:25:22.060000"
},
{
"id": "2",
"title": "New TW Projec API",
"owner_id": "dsdssdsd445d",
"description": "Testin API",
"status": "unactiveAPI",
"start_time": "2017-08-01 14:25:22.060000",
"finish_time": "2017-08-01 14:25:22.060000",
"created": "2017-08-01 14:25:22.060000",
"modified": "2017-08-01 14:25:22.060000"
},
{
"id": "3",
"title": "Projec API",
"owner_id": "dsdssdsd445d",
"description": "Testin",
"status": "unactiveAPI",
"start_time": "2017-08-01 14:25:22.060000",
"finish_time": "2017-08-01 14:25:22.060000",
"created": "2017-08-01 14:25:22.060000",
"modified": "2017-08-01 14:25:22.060000"
}
]
答案 0 :(得分：2)
使用GSON和一个类，然后您不需要手动获取每个变量。
public class UserDocument{
public int id;
public String title;
public String owner_id;
public String description;
public String status;
public Date start_time;
public Date finish_time;
public Date created;
public Date modified;
public UserDocument() {}; //Needs an empty constructor for reflection;
}
现在你有了这个课程，那么你可以写
UserDocument[] userDocuments = new Gson().fromJson(json, UserDocument[].class);
for(UserDocument userDocument : userDocument){
HashMap<String, Object> properties = new HashMap<>();
properties.put("id", userDocument.id);
properties.put("title", userDocument.title);
properties.put("owner_id", userDocument.owner_id);
properties.put("description", userDocument.description);
properties.put("status", userDocument.status);
properties.put("start_time", userDocument.start_time);
properties.put("finish_time", userDocument.finish_time);
properties.put("created", userDocument.created);
properties.put("modified", userDocument.modified);
try {
document.putProperties(properties);
} catch (CouchbaseLiteException e) {
e.printStackTrace(); //This will tell you why it fails
}
}
只需定义属性的类型，然后GSON将检查属性是否可以成为该类型
答案 1 :(得分：0)
不可能将hashmap的多个属性放入奇异的Couchbase doucment中。
您每次都可以
创建一个新文档document = database.createDocument();
或者
document = database.getDocument(String documentId);
在
document.putProperties(properties);
我的代码现在可以正常运行而不会崩溃
ProjectSummary[] projectSummaries = new Gson().fromJson(json, ProjectSummary[].class);
int project_number=1;
HashMap<String, Object> properties = new HashMap<>();
for (ProjectSummary projectSummary : projectSummaries) {
// Create a new document - Every Project-List Will Be Its Own Document
document = database.getDocument("Project-"+ project_number);
properties.put("id", projectSummary.id);
properties.put("title", projectSummary.title);
properties.put("owner_id", projectSummary.owner_id);
properties.put("description", projectSummary.description);
properties.put("status", projectSummary.status);
properties.put("start_time", projectSummary.start_time);
properties.put("finish_time", projectSummary.finish_time);
properties.put("created", projectSummary.created);
properties.put("modified", projectSummary.modified);
try {
document.putProperties(properties);
Toast.makeText(context, project_number+"- ID Saved", Toast.LENGTH_SHORT).show();
} catch (CouchbaseLiteException e) {
e.printStackTrace(); //This will tell you why it fails
Toast.makeText(context, "failure", Toast.LENGTH_SHORT).show();
}
//Increase Project Number
project_number++;
}
Toast.makeText(context, "Project Download Successful \n" , Toast.LENGTH_SHORT).show();
}
Hashmap Mapping的ProjectSummary类
public class ProjectSummary {
public String id;
public String title;
public String owner_id;
public String description;
public String status;
public String start_time;
public String finish_time;
public String created;
public String modified;
public ProjectSummary() {
}