kafka连接JDBC接收器。展平JSON记录时出错

import org.json.JSONObject;

public boolean isValidJson(String jsonString) {
    try {
        new JSONObject(jsonString);
        return true;
    } catch (Exception e) {
        return false;
    }
}

import org.json.JSONObject;

public void processJson(String jsonString) {
    JSONObject json = new JSONObject(jsonString);
    if (json.has("requiredField")) {
        String value = json.getString("requiredField");
        // 处理字段值
    } else {
        throw new IllegalArgumentException("Missing required field: requiredField");
    }
}

import org.json.JSONObject;

public void insertIntoDatabase(String jsonString) {
    JSONObject json = new JSONObject(jsonString);
    int id = json.getInt("id");
    String name = json.getString("name");
    // 将数据插入数据库
}

// 示例：加载JDBC驱动程序
Class.forName("com.mysql.cj.jdbc.Driver");

// 示例：建立数据库连接
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydatabase", "username", "password");