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How to resolve Russian language encoding in java?

Constructing a String with value as ФФХЧЯЯЯЯэшЩтЯ .The string value is in Russian Language.
String russian=new String("ФФХЧЯЯЯЯэшЩтЯ");
Printing the string as below.
ФФХЧЯЯЯЯ�?шЩтЯ
so the э in the character set is not able to convert.
Tried with all the possible encoding types like, UTF-8,ISO-8859-1,ISO-8859-2,ISO-8859-3 and many things i have tried
public void setter(String attachment) {
try {
filename=new String(filename.getBytes(),"UTF-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
this.filename= filename;
}

Performance tune code in O (n^2) to be more performant

I have this spring boot java controller having code that utilizes the OpenKM document management API to search the document management system for documents and display results using Ajax, HTML, CSS and Jquery datatables on the front-end.
Due to the way the API was written, I cannot get a document object with its metadata in one call but will need to use an output of the first API operation's call as a filter for another API operation method in two nested for loops.
Additionally, I had to iterate the toString method of an API return object to retrieve the metadata information, as they were not accessible through the return object's properties.
The problem is the performance of this code. I would like to see if there is a way to optimize this code.
// Read the property or metadata to use in constituting the StoredDocument object
for (QueryResult queryResult : resultSet.getResults()) {
// Create a locally-scoped List<String>
List<String> listOfStoredDocumentProperties = new ArrayList<String>();
Document document = queryResult.getDocument();
String nodeId = document.getPath();
// Populate storedDocument object
storedDocument = new StoredDocument();
storedDocument.setAuthor(document.getAuthor());
storedDocument.setCreated(document.getCreated());
storedDocument.setLastModified(document.getLastModified());
storedDocument.setPath(document.getPath());
storedDocument.setPermissions(document.getPermissions());
storedDocument.setSize(document.getActualVersion().getSize());
storedDocument.setUuid(document.getUuid());
storedDocument.setVersionNumber(document.getActualVersion().getName());
// System.out.println(nodeId);
try {
listOfFormElement = okm.getPropertyGroupProperties(nodeId, documentVo.getGroupId());
int counterForTrackingDocDirectionPos = 0;
for (FormElement formElement : listOfFormElement) {
++counterForTrackingDocDirectionPos;
if (counterForTrackingDocDirectionPos == 4) {
String formElementString = formElement.toString();
// System.out.println("formElementString: " + formElementString);
System.out.println("name: " + formElement.getName());
System.out.println("formElement: " + formElement);
String transformedFormElementString = StringUtils.EMPTY;
try {
transformedFormElementString = formElementString.substring(0, formElementString.indexOf(", selected=true"));
// Read the string from a position that is 3 steps before the last position in the string.
transformedFormElementString = transformedFormElementString
.substring(transformedFormElementString.length() - 3, transformedFormElementString.length()).trim();
transformedFormElementString = transformedFormElementString.startsWith("=")
? transformedFormElementString.substring(1, transformedFormElementString.length()) : transformedFormElementString;
} catch (Exception ex) {
// To catch scenario where formElementString.indexOf(", selected=true") does not find the
// specified string. This happens when document direction is not set and therefore is
// selected=false for both the options IN and OUT.
transformedFormElementString = "NOT SET";
}
listOfStoredDocumentProperties.add(transformedFormElementString);
System.out.println("transformedFormElementString: " + transformedFormElementString);
} else {
String formElementString = formElement.toString();
String transformedFormElementString = formElementString.substring(formElementString.indexOf("value="),
formElementString.indexOf("data="));
// Remove the preceding 'value=' and the last 2 character-constituted string ", "
transformedFormElementString = transformedFormElementString.substring(6, transformedFormElementString.length() - 2).trim();
listOfStoredDocumentProperties.add(transformedFormElementString);
}
}
storedDocument.setCompanyName(listOfStoredDocumentProperties.get(0));
storedDocument.setProductLine(listOfStoredDocumentProperties.get(1));
storedDocument.setSubjectHeading(listOfStoredDocumentProperties.get(2));
storedDocument.setDocumentDirection(listOfStoredDocumentProperties.get(3));
storedDocument.setDocumentType(listOfStoredDocumentProperties.get(4));
storedDocument.setReferenceNumber(listOfStoredDocumentProperties.get(5));
storedDocument.setDate(ISO8601.parseBasic(listOfStoredDocumentProperties.get(6)).getTime().toString());
// Add the storedDocument object to the return list
listOfstoredDocuments.add(storedDocument);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (NoSuchGroupException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (PathNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (RepositoryException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (DatabaseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (UnknowException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (WebserviceException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

The solution for it is extending the REST API. In the professional edition, the REST API is extensible with plugins architecture https://docs.openkm.com/kcenter/view/okm-6.4/creating-your-own-rest-plugin-(-extending-rest-api-).html, in the community this option still is not present. The idea is to build a method from server side what provide the exact data what really you need, creating high-level methods.

How to get values and keys through single line string xml in android [duplicate]

This question already has answers here:
How do I parse JSON in Android? [duplicate]
(3 answers)
Closed 8 years ago.
I am encounter a problem. I have following xml
<string>[{"BatchIDs":[],"HomeWorkCategoryName":"","FileURL":"","FileName":"","ID":1,"Title":"test","Description":"test","HomeworkCategoryID":1,"ExpiryDate":"\/Date(1386658800000)\/","FileID":-2147483648,"URL":"","Mode":1,"Type":2,"Status":1,"CreatedOnDate":"\/Date(1388093500883)\/","UpdatedOnDate":"\/Date(1388093500883)\/","Inactive":false,"Deleted":true},
{"BatchIDs":[],"HomeWorkCategoryName":"","FileURL":"","FileName":"","ID":1,"Title":"test","Description":"test","HomeworkCategoryID":1,"ExpiryDate":"\/Date(1386658800000)\/","FileID":-2147483648,"URL":"","Mode":1,"Type":2,"Status":1,"CreatedOnDate":"\/Date(1388093500883)\/","UpdatedOnDate":"\/Date(1388093500883)\/","Inactive":false,"Deleted":true},
{"BatchIDs":[],"HomeWorkCategoryName":"","FileURL":"","FileName":"","ID":1,"Title":"test","Description":"test","HomeworkCategoryID":1,"ExpiryDate":"\/Date(1386658800000)\/","FileID":-2147483648,"URL":"","Mode":1,"Type":2,"Status":1,"CreatedOnDate":"\/Date(1388093500883)\/","UpdatedOnDate":"\/Date(1388093500883)\/","Inactive":false,"Deleted":true}]
And I want to read all values passed in this xml. This xml is single string return by web service. Currently I am using following code (it's also providing null value for first entry)
Object result = envelope.getResponse();
str=result+"";
String key,value;
String[] couple = str.split(",\"");
for(int i =0; i < couple.length ; i++) {
String[] items =couple[i].split(":");
key=items[0];
value=items[1];
key=key.replaceAll("\"", "");
value=value.replaceAll("\"", "");
/* some conditions to fetch values */
}
Please tell me how can I get exact values and keys in android.
Thanks,

It seems to be a valid json. You can use http://jsonlint.com/ to check that.
So with this following class : JSONArray, you can retrieve what you want.

Thanks everyone for helping me.
Here is my soluction through I overcome my problem. May be it will use for others
HttpGet httpRequest = new HttpGet(_URL);
HttpClient httpclient = new DefaultHttpClient();
HttpResponse httpresponse = httpclient.execute(httpRequest);
JSONArray response = null;
try {
response = new JSONArray(getJSONString(httpresponse));
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
for (int i = 0; i < response.length(); i++) {
try {
//your values
String _name=response.getJSONObject(i).getString("NAME");
}
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Here is 2nd function.If your function is parse through xml code.
public static String getJSONString(HttpResponse response) {
try {
DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(response.getEntity().getContent());
NodeList nl = doc.getElementsByTagName("string");
Node n = nl.item(0);
String str = n.getFirstChild().getNodeValue();
return str;
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
Happy Coding

Java - Jackson to a file

I have a JSON file like this:
{
"Product":
{
"ID": "08-17-96-71-D9-68",
"Licences":
{
"total": 40,
"used": 0,
"remain": 40
}
}
}
I used jackson to convert it to a Java Object and I get all the values (so far, so good).
My problem is that I want to change these values and re-write the JSON file but when I do that, the result is like this:
"{\"Product\":{\"IaD\": \"08-17-96-71-D9-68\",\"Licences\":{\"total\": 40,\"used\": 1,\"remain\": 39}}}"
So when I tried to read it again it gives me an error because it cannot read the first and last character (") and also it reads the \ character.
This is my code:
public class UsingJason {
String theJsonString = "";
ObjectMapper mapper = new ObjectMapper();
public class Product{
Licences lic;
public class Licences{
int total;
int used;
int remain;
}
}
public void readJson(){
if(new File("asset/testJson.json").exists()){
theJsonString = "";
try {
BufferedReader in = new BufferedReader(new FileReader("asset/testJson.json"));
String line;
while ((line = in.readLine()) != null){
theJsonString += line;
}
in.close();
} catch (IOException e1) {
e1.printStackTrace();
}
System.out.println("JSON String: "+ theJsonString);
}else{
System.out.println("NO FILE FOUND");
}
JsonNode rootNode = null;
try {
rootNode = mapper.readValue(theJsonString, JsonNode.class);
} catch (JsonParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (JsonMappingException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
JsonNode totalNode = rootNode.get("Product").get("Licences").get("total");
JsonNode usedNode = rootNode.get("Product").get("Licences").get("used");
JsonNode remainNode = rootNode.get("Product").get("Licences").get("remain");
JsonNode idStringNode = rootNode.get("Product").get("ID");
// Parse it into a Java object.
try {
int totalObject = mapper.readValue(totalNode, Integer.class);
System.out.println("INTEGER? HAS TO BE... 40: "+totalObject);
String idString = mapper.readValue(idStringNode, String.class);
System.out.println("String? Has to be 08-17-96-71-D9-68: "+idString + " True? "
+ idString.equals("08-17-96-71-D9-68") );
int usedObject = mapper.readValue(usedNode, int.class);
int remainObject = mapper.readValue(remainNode, int.class);
System.out.println("Going to rest 1");
usedObject ++;
remainObject = totalObject - usedObject;
String toJackson = "{\"Product\":{\"I\\D\": \"08-17-96-71-D9-68\",\"Licences\":{\"total\": "+totalObject+",\"used\": "+usedObject+",\"remain\": "+remainObject+"}}}";
System.out.println("String created: " +toJackson);
// THIS toJackson String returns the string without \ and without the "
// IT PRINT THIS: {"Product":{"ID": "08-17-96-71-D9-68","Licences":{"total": 40,"used": 1,"remain": 39}}}
// EXACTLY WHAT I WANT TO Write in the Json file but it writes the \ ..
mapper.writeValue(new File("asset/testJson.json"), toJackson);
} catch (JsonParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (JsonMappingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Can anyone tell me what I am doing wrong?

In your code here:
mapper.writeValue(new File("asset/testJson.json"), toJackson);
You are serializing not an object, but the string to the file. I suppose this is the reason why it gets escaped, like any string.
The input value should be an object with your structure.
Something like this:
// Initialize an object
Product myProduct = new Product();
myProduct.lic = new Procuct.Licences();
myProduct.lic.total = totalObject;
myProduct.lic.used = usedObject;
myProduct.lic.remain = remainObject;
// Serialize the object into JSON
mapper.writeValue(new File("asset/testJson.json"), myProduct);

Setting values to object dynamically (dynamic property/type)

I'm trying to create JSON to Object mapper. Its main idea is that "user" defines a dictionary where keys are JSON attributes and values are Objects property names. So how does it work (so far):
Get value from JSON (var jsonValue)
Get property type from getter (var methodType)
Create setter method and insert value from json
Only problem is that I can't cast jsonValue into object dynamically. I have to check what's the object type (methodType) and then cast it differently for String, Long, Integer and so on. Can I somehow cast it dynamically?
private Cookbook createCookbook(JsonObject jsonCookbook) {
//Cookbook to return
Cookbook cookbook = new Cookbook();
Enumeration<String> e = mappingDictionary.keys();
while (e.hasMoreElements()) {
//get JSON value
String mappingKey = e.nextElement();
JsonElement json = jsonCookbook.get(mappingKey);
String jsonValue = json.getAsString();
//set JSON value to property
String mappingValue = mappingDictionary.get(mappingKey);
//reflection
try {
//get type of the getter
String getMethodName = "get" + mappingValue;
Method getMethod = cookbook.getClass().getMethod(getMethodName, null);
Class<?> methodType = getMethod.getReturnType();
//set methods
String setMethodName = "set" + mappingValue;
Method setMethod = cookbook.getClass().getMethod(setMethodName, methodType);
//set value to property
/* DONT WANT TO DO IT LIKE THIS, THIS IS MY PROBLEM */
if (methodType.equals(String.class))
setMethod.invoke(cookbook, jsonValue);
if (methodType.equals(Long.class))
setMethod.invoke(cookbook, Long.valueOf(jsonValue));
} catch (NoSuchMethodException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IllegalArgumentException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IllegalAccessException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (InvocationTargetException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
return cookbook;
}

You can create non-primitive objects of unknown type in runtime using reflection (as You used) and .newInstance() method.
You can't create primitive types in this way, for example, if You take look in standart JDK serialization implementation (writeObject() of ObjectWriter), You see the switch with 8 cases.