我们如何在where块中将hashmap用作变量

import java.util.HashMap;

public class Main {
    public static void main(String[] args) {
        // 创建一个HashMap作为条件
        HashMap<String, Object> conditions = new HashMap<>();
        conditions.put("name", "John");
        conditions.put("age", 25);

        // 生成WHERE子句
        StringBuilder whereClause = new StringBuilder("WHERE ");
        for (String key : conditions.keySet()) {
            whereClause.append(key).append(" = ").append(conditions.get(key)).append(" AND ");
        }
        whereClause.delete(whereClause.length() - 5, whereClause.length()); // 删除最后的AND

        // 构建完整的SQL查询语句
        String sql = "SELECT * FROM table " + whereClause.toString();

        System.out.println(sql);
        // 输出结果：SELECT * FROM table WHERE name = John AND age = 25
    }
}