反射实现增删改查（DAO层）——删除数据

先贴出代码，后续补充自己的思路、配置文件、使用方式：

/**
	 *
	 *  删除数据
	 */
	@Override
	public void deleteObject(List<Map<String, Object>> params, String tableName) {
		StringBuilder sql = new StringBuilder(
				"DELETE FROM order_info WHERE 1=1 ");
		Connection connection = null;
		PreparedStatement preparedStatement = null;
		try {
			connection = DBConnection.getConnection();
			if (params != null && params.size() > 0) {
				for (int i = 0; i < params.size(); i++) {
					Map<String, Object> map = params.get(i);
					sql.append(" AND  " + map.get("name") + " "
							+ map.get("rela") + " " + map.get("value") + " ");
				}
			}
			connection = DBConnection.getConnection();
			preparedStatement = connection.prepareStatement(sql.toString());
			preparedStatement.executeLargeUpdate();

		} catch (SQLException e) {
			e.printStackTrace();
			System.out.println("删除失败！");
		} catch (IllegalArgumentException e) {
			e.printStackTrace();
		} finally {
			DBConnection.close(connection, preparedStatement, null);
		}

	}

基本流程：（这张表结合源码备注理解应该问题不大）如果看不清楚，复制图片地址在新窗口中查看