一种描述数据库中数据表的数据结构

数据库中的数据表有两部分组成，表头和数据记录。可以使用以下数据结构

import java.io.Serializable;import java.util.List;import java.util.Map;public final class DBRecords implements Serializable {private final Map<String, Integer> catalog;private final List<String[]> records;public DBRecords(final Map<String, Integer> catalog, final List<String[]> records) {this.catalog = catalog;this.records = records;}public final int getColumnIndex(final String name) {if (catalog.containsKey(name))return catalog.get(name);return -1;}public final List<String[]> getRecords() {return records;}public final Map<String, Integer> getCatalog() {return catalog;}public int size() {if (records != null)return records.size();return 0;}public boolean isEmpty() {if (records == null || records.isEmpty())return true;return false;}public String[] get(int id) {if (records.size() <= id || id < 0)return null;return records.get(id);}}