Spring MVCからのJSON応答の機密フィールドを無視する方法は?

<code class="java">@Entity
@Table(name = "user")
@JsonIgnoreProperties(ignoreUnknown = true)
public class User {
    // ... (Model fields)
}</code>

<code class="java">@RequestMapping(value = "/getUser/{userId}", method = RequestMethod.GET)
@ResponseBody
public User getUser(@PathVariable Integer userId) throws Exception {
    User user = userService.get(userId);
    return user;
}</code>

<code class="java">@JsonIgnore
public String getEncryptedPwd() {
    return encryptedPwd;
}</code>

<code class="java">@RequestMapping(value = "/getUser/{userId}", method = RequestMethod.GET)
@ResponseBody
public User getUser(@PathVariable Integer userId, @RequestHeader("username") String username) {
    User user = userService.get(userId);
    
    // Get excluded fields list based on the logged-in user
    List<String> excludedFields = getExcludedFields(username);
    
    // Iterate through the excluded fields and set their values to null
    for (String field : excludedFields) {
        switch (field) {
            case "encryptedPwd":
                user.setEncryptedPwd(null);
                break;
            // ... (Similar logic for other fields)
        }
    }
    
    return user;
}</code>