如何在下拉列表中填充多个sql select语句

import java.util.HashMap;
import java.util.Map;

// 定义一个Map，存储多个SQL SELECT语句
Map<String, String> sqlStatements = new HashMap<>();
sqlStatements.put("Statement1", "SELECT * FROM table1;");
sqlStatements.put("Statement2", "SELECT * FROM table2;");
sqlStatements.put("Statement3", "SELECT * FROM table3;");

// 将Map转换为JSON格式返回给前端
String json = new Gson().toJson(sqlStatements);
response.setContentType("application/json");
response.setCharacterEncoding("UTF-8");
response.getWriter().write(json);

// 发送请求获取后端返回的SQL SELECT语句数组或字典
fetch('/getSqlStatements')
  .then(response => response.json())
  .then(data => {
    // 获取下拉列表元素
    const selectElement = document.getElementById('sqlSelect');

    // 遍历SQL SELECT语句数组或字典，将其填充到下拉列表中
    for (const key in data) {
      if (data.hasOwnProperty(key)) {
        const optionElement = document.createElement('option');
        optionElement.value = data[key];
        optionElement.text = key;
        selectElement.appendChild(optionElement);
      }
    }
  });