private static String createTable(Class<?> bean) {
	    String tableName = getTableName(bean);
	    List<NameAndType> columns = getColumns(bean);
	    if (tableName != null && !tableName.equals("") && !columns.isEmpty()) {
	        StringBuilder createTableSql = new StringBuilder("create table ");
	        //加表名
	        createTableSql.append(tableName);
	        createTableSql.append("(");

	        //加表中字段
	        for (int i = 0; i < columns.size(); i++) {
	            NameAndType column = columns.get(i);
	            createTableSql.append(column.name);
	            createTableSql.append(" ");
	            createTableSql.append(column.type);
	            // 追加下一个字段定义前需要添加逗号
	            if (i != columns.size() - 1) {
	                createTableSql.append(",");
	            }
	        }
	        createTableSql.append(")");
	        return createTableSql.toString();
	    }

	    return null;
	}