While returning the string it adds extra slash to the string

Question

I am writing a rest api.All things are set and woking fine. My controller :

@RequestMapping(value = "/getDetails", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public String getDetails(@RequestBody String jsonInput) {
    LOGGER.info("<------------------------ from Date   :" + jsonInput );
    System.out.println("resp ="+apiService.getDetails(jsonInput));
    return apiService.getDetails(jsonInput);

}

When I sysout the response on console it will print normal string like -

[{"name": "abc","vendor": "abc df"}]

But I get the respnse with extra slash. All double quote is replaced by \".

"[{\"name\":\"abc\",\"vendor\":\"abc df\"}]"

Please help !. Thanks in advance.

This is expected behavior. The `\ ` escapes special characters so that they can be printed. Inspecting a `Map()` object might reveal a similar outcome. — j.seashell, Jan 03 '17 at 18:38
i have found a more but subtle question , http://stackoverflow.com/questions/3020094/how-should-i-escape-strings-in-json — Pavneet_Singh, Jan 03 '17 at 18:44
Already done this,when converting string to object to json Gson gson = new GsonBuilder().disableHtmlEscaping().create(); String jsonRes = gson.toJson(resp); — Samir, Jan 03 '17 at 18:46
@j.seashell : I know this is the expected, but I am searching the way to remove slash. — Samir, Jan 03 '17 at 18:53
When I hit the api from postman tool ,the response looks weird. — Samir, Jan 03 '17 at 18:54
Why are you getBillingDetails in print and getDetails in return? — John Down, Jan 03 '17 at 19:10
What is "looks weird"? You should NOT do what you're trying to do. JSON specifications require `"` to be escaped. Not to mention, how is Javascript supposed to interpret this response if the quotes aren't escaped? — Christopher Schneider, Jan 03 '17 at 19:10

John Down · Answer 1 · 2017-01-03T19:02:26.360

0

This is expected so the object can be reconstructed later on. The "\" escapes the quote. You can replace the "\" with a empty string:

@ResponseBody
public String getDetails(@RequestBody String jsonInput) {
    LOGGER.info("<------------------------ from Date   :" + jsonInput );
    System.out.println("resp ="+apiService.getBillingDetails(jsonInput));
    return apiService.getDetails(jsonInput).replace("\\", "");

}

edited Jan 03 '17 at 19:02

answered Jan 03 '17 at 18:57

John Down

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1

No. It's not working. :( This is what I am telling when I print the sysout it printing the normal JSON. But I am getting extra slash in postman tool or any other rest api hitting tool. – Samir Jan 03 '17 at 19:05

score 0 · Answer 2 · answered Jul 05 '18 at 12:29

0

use

string ResponseString = Regex.Unescape(oldString);

This should remove all the unnecessary escape characters.

answered Jul 05 '18 at 12:29

Abhiram Chennuru

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score 0 · Answer 3 · edited Jul 24 '20 at 13:44

I recently came across the same issue. I was trying to fix it for a long time and finally found the fix and what I was doing wrong. I was framing multiple json strings using Jackson library and storing it into a list.

When I tried to return the jsonList as such to my controller, I was getting the ouput printed on my postman API with double quotes and backslashes, although I did not have this issue while printing to console.

When I tried to return my list as String to the controller fixed my issue.

jsonString = frameJsonKeyValuePair(header, dataList);
if (jsonString != null)
        jsonStringList.add(jsonString);
}
return jsonStringList.toString();

While returning the string it adds extra slash to the string

3 Answers3