Replacing Json String With Another String in Java

How to replace a string inside of Json using java

I think a simple loop should solve your problem:

public static void main(String[] args) throws JSONException {
    JSONArray array = new JSONArray("[" +
            "    {" +
            "        originalName      : \"Case #\"," +
            "        modifiedLabel     : \"Case #\"," +
            "        labelId           : \"case_number_lbl\"," +
            "        isEditable        : \"true\"," +
            "        imageClass        : \"\"" +
            "    }" +
            "]");

    System.out.println(array.toString(2));

    for (int i = 0; i < array.length(); i++) {
        JSONObject object = array.getJSONObject(i);
        JSONArray keys = object.names();
        for (int j = 0; j < keys.length(); j++) {
            String key = keys.getString(j);
            if (object.getString(key).equals("Case #")) {
                object.put(key, "Ticket #");
            }
        }
    }

    System.out.println();
    System.out.println(array.toString(2));
}

replace substring from string in java

public static void main(String...strings) {     
    String inputString = "{\n" + "\"id\": 1,\n" + "\"data\":[\n" + "{\n" + "\"to\":123456789,\"name\":\"james\",\"value\":200\n" + "},\n" + "{\n" + "\"to\":123456789,\"name\":\"jhon\",\"value\":20\n" + "}]\n" + "}\n" + "";
    Pattern pattern = Pattern.compile("(?:\"name\":\")(.*?)(?:\"value\":)[0-9]*");
    Matcher m = pattern.matcher(inputString);

    while (m.find()) {
        String[] matches = m.group().split(",");
        String name = null, value = null;
        for (String match : matches) {
            if(match.contains("name")){
                name= match.substring(match.indexOf("name")+"name".length()).replaceAll("\"", "");
            }else if(match.contains("value")) {
                value= match.substring(match.indexOf("value")+"value".length()).replaceAll("\"", "");
            }
        }
        System.out.println("Bonjour Mr. "+name+" votre score est value "+value);
    }       
}

Replace a String with specific list of strings in java

List is declared as
List<String> varList = Arrays.asList("VAR_TEMP", "VAR_TEMPA", "VAR_TEMPB");

Operation is String operation = "var temp = VAR_TEMPB";

The loop acts as following:

1. Does operation (var temp = VAR_TEMPB) contains VAR_TEMP? Yes
2. Now operation now is var temp = 'HI'B
3. Does operation (var temp = 'HI'B) contains VAR_TEMPA? No. Operation is not changed
4. Does operation (var temp = 'HI'B) contains VAR_TEMPB? No. Operation is not changed

A simple solution should be the use of Regular Expression, when you express the exact matching pattern. For example:

class Scratch {
  public static void main(String[] args) {
    final List<Pattern> varList =
        Arrays.asList(
            Pattern.compile("(VAR_TEMP)$"),
            Pattern.compile("(VAR_TEMPA)$"),
            Pattern.compile("(VAR_TEMPB)$"));

    String operation = "var temp = VAR_TEMPB";

    Matcher tmp;
    for (Pattern item : varList) {
      tmp = item.matcher(operation);
      operation = tmp.find() ? operation.replace(tmp.group(), "'HI'") : operation;
    }

    System.out.println("Final operation : " + operation);
  }
}

Within a JSON string how does one for all string values of a given key replace any occurrence of a specific substring?

I wont recommend using replace on a json converted to string.

Instead, I'd recursively loop through the array/objects and alter the value if needed

Simple example:

const data = [{"name": "please, I said please", "title": "Test One", "more": [{"name": "another name", "title": "please write something"} ] }, {"name": "testTwo", "title": "Test Two"}, {"name": "testThree", "title": "Test Three"}, {"name": "testFour", "title": "Test Four"} ];
const regx = new RegExp(`\\bplease\\b`, 'gi');

function replace(obj) {
    for (var k in obj) {
        if (typeof obj[k] == "object" && obj[k] !== null) {
            replace(obj[k]);
        } else if (k === 'title') {
            obj[k] = obj[k].replaceAll(regx, 'could you');
        }
    }
    return obj;
}

const result = data.map(o => replace(o));
console.log(result);

const replace = {type: "MERCEDES+BENZ"}
const replacedReplace = JSON.parse(JSON.stringify(replace).replace('+', ' '))
console.log(replacedReplace)