返回数据格式

// 查询全部问题
	public ArrayList queryQuestion() {
		ArrayList paraList = new ArrayList();
		try {
			// 加载驱动程序
			Class.forName(driver);
			// 使用getConnection方法链接数据库
			conn = DriverManager.getConnection(url, user, password);
			// sql语句
			String sql = "SELECT * FROM question ";
			// 创建执行对象
			Statement state = conn.createStatement();
			ResultSet rs = state.executeQuery(sql);
			while (rs.next()) {
				String str = rs.getString("content_img");
				String[] line = str.split(",");
				// imgArr.add(str);
				Map<String, Object> map = new HashMap<String, Object>();
				map.put("id", rs.getInt("id"));
				map.put("title", rs.getString("title"));
				map.put("quesion_id", rs.getInt("quesion_id"));
				map.put("content", rs.getString("content"));
				// map.put("content_img", rs.getString("content_img"));
				map.put("content_img", line);
				map.put("answer_num", rs.getInt("answer_num"));
				map.put("like_num", rs.getInt("like_num"));
				paraList.add(map);
			}
			rs.close();
			conn.close();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return paraList;
	}