Der Pfad kann mit Java nicht gefunden werden

{"details": "{\"user\":\"user1\",\"password\":\"1234\"}"}

ObjectMapper mapper = new ObjectMapper(); 
ObjectNode node = (ObjectNode) mapper.readTree(new File(templatePath)); 

// System.out.println(node); 

Configuration config = Configuration.builder()
    .jsonProvider(new JacksonJsonNodeJsonProvider())
    .mappingProvider(new JacksonMappingProvider()).build(); 
    
json = JsonPath.using(config).parse(node);

for (int i = 0; i < list.size(); i++) {
    String x = list.get(i); 
    arr = x.split(": "); 
    String newHeader = arr[0].replace("|", "."); 
    
    if (newHeader.contains("[")) { 
        String nHeader = "$." + newHeader; 
        String actualVal; 
        if (arr.length >= 2) { 
            actualVal = arr[1]; 
        } else { 
            actualVal = ""; 
        } 
        json.set(nHeader, actualVal).jsonString(); 
    } else { 
        String actualVal; 
        if (arr.length >= 2) { 
            actualVal = arr[1]; 
        } else { 
            actualVal = ""; 
        } 
        json.set(newHeader, actualVal).jsonString(); 
    }
}

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JsonUpdateExample {

public static void main(String[] args) {
    // Sample JSON string
    String jsonString = "{\"name\":\"John\", \"age\":25, \"city\":\"New York\"}";

    // Field to update
    String fieldToUpdate = "age";
    
    // New value for the field
    int newValue = 30;

    // Update the JSON
    String updatedJson = updateJsonField(jsonString, fieldToUpdate, newValue);

    // Print the updated JSON
    System.out.println(updatedJson);
}

private static String updateJsonField(String jsonString, String fieldToUpdate, int newValue) {
    try {
        // Create ObjectMapper
        ObjectMapper objectMapper = new ObjectMapper();

        // Read the JSON string into a JsonNode
        JsonNode jsonNode = objectMapper.readTree(jsonString);

        // Update the field
        ((ObjectNode) jsonNode).put(fieldToUpdate, newValue);

        // Convert the updated JsonNode back to a JSON string
        return objectMapper.writeValueAsString(jsonNode);
    } catch (Exception e) {
        e.printStackTrace();
        return jsonString; // return the original JSON in case of an error
    }
}
}