从json响应中删除unicode字符串和空格

Question

I am calling a webservice which gives me Json Response. Here is the code

URL url = new URL(strUrl);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
...
//get response text
BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream(),"UTF-8"));           
StringBuffer response = new StringBuffer();
while ((respText = br.readLine()) != null) {                
    response.append(respText);
}
br.close(); 
retValue = response.toString();

The problem is response is like the following

"{\u000d\u000a  \"groups\": [\u000d\u000a    {\u000d\u000a      \"signingGroupId\": \"323793\",\u000d\u000a      \"groupName\": \"1440 Signing Group 1\",\u000d\u000a      \"groupType\": \"sharedSigningGroup\",\u000d\u000a      \"created\": \"3\/27\/2019 6:08:34 AM\",\u000d\u000a      \"createdBy\": \"ABC Software\",\u000d\u000a      \"modified\": \"4\/1\/2019 6:40:45 AM\",\u000d\u000a      \"modifiedBy\": \"Corner O'Brien\"\u000d\u000a    },\u000d\u000a    {\u000d\u000a      \"signingGroupId\": \"323794\",\u000d\u000a      \"groupName\": \"1440 Another Group\",\u000d\u000a      \"groupType\": \"sharedSigningGroup\",\u000d\u000a      \"created\": \"3\/27\/2019 6:14:52 AM\",\u000d\u000a      \"createdBy\": \"XYZ Software\",\u000d\u000a      \"modified\": \"3\/27\/2019 6:16:37 AM\",\u000d\u000a      \"modifiedBy\": \"XYZ Software\"\u000d\u000a    }\u000d\u000a  ]\u000d\u000a}"

I want to make respose like this from the above response

"{"groups":[{"signingGroupId": "323793","groupName": "1440 Signing Group 1","groupType": "sharedSigningGroup","created": "3/27/2019 6:08:34 AM","createdBy": "ABC Software","modified": "4/1/2019 6:40:45 AM","modifiedBy": "John O'Brien"},{"signingGroupId": "323794","groupName": "1440 Another Group","groupType": "sharedSigningGroup","created": "3/27/2019 6:14:52 AM","createdBy": "ABC Software","modified": "3/27/2019 6:16:37 AM","modifiedBy": "ABC Software"}]}"

That is to remove all the \ \ and spaces after that. But not to remove space from any of the Json Property.

I tried this

retValue = retValue.replace("\\u000d\\u000a", "");
retValue = retValue.replace("\\", "");

which gives me

"{  "groups": [    {      "signingGroupId": "323793",      "groupName": "1440 Signing Group 1",      "groupType": "sharedSigningGroup",      "created": "3/27/2019 6:08:34 AM",      "createdBy": "ABC Software",      "modified": "4/1/2019 6:40:45 AM",      "modifiedBy": "John O'Brien"    },    {      "signingGroupId": "323794",      "groupName": "1440 Another Group",      "groupType": "sharedSigningGroup",      "created": "3/27/2019 6:14:52 AM",      "createdBy": "XYZ Software",      "modified": "3/27/2019 6:16:37 AM",      "modifiedBy": "XYZ Software"    }  ]}"

But still there are spaces. Now If I use

String replcaedNewLineAndSpaces = retValue.replaceAll("[ \t]+", "");

Problem is with this line is it also removes spaces from the Json Properties.

"{"groups":[{"signingGroupId":"323793","groupName":"1440SigningGroup1","groupType":"sharedSigningGroup","created":"3/27/20196:08:34AM","createdBy":"ABCSoftware","modified":"4/1/20196:40:45AM","modifiedBy":"JohnO'Brien"},{"signingGroupId":"323794","groupName":"1440AnotherGroup","groupType":"sharedSigningGroup","created":"3/27/20196:14:52AM","createdBy":"XYZSoftware","modified":"3/27/20196:16:37AM","modifiedBy":"XYZSoftware"}]}"

See groupName which was "groupName": "1440 Signing Group 1" . Now becomes 1440SigningGroup1 . Similarly for other properties.

Is there anyway It keeps the Json String as it is but remove \ \ and spaces after it. So the final response become

"{"groups":[{"signingGroupId": "323793","groupName": "1440 Signing Group 1","groupType": "sharedSigningGroup","created": "3/27/2019 6:08:34 AM","createdBy": "ABC Software","modified": "4/1/2019 6:40:45 AM","modifiedBy": "John O'Brien"},{"signingGroupId": "323794","groupName": "1440 Another Group","groupType": "sharedSigningGroup","created": "3/27/2019 6:14:52 AM","createdBy": "ABC Software","modified": "3/27/2019 6:16:37 AM","modifiedBy": "ABC Software"}]}"

Thanks

Answer 1

As referred in the comments, creating a POJO class and parsing the JSON would be optimal and safe. (I think the most common library is GSon library )

However, if you insist removing spaces though, do it with a simple regex:

retValue.replaceAll("\\\\u000d\\\\u000a\\s*", "")

This will replace all strings starting with \ \ followed by 0-unlimited spaces.