[英]Extract data table from text file Java
I have a problem of extracting table of data from text file using java. 我有一个问题,使用Java从文本文件中提取数据表。
The table is arrange as below: 表格安排如下:
FirstName Surname Mark Age Height
Charlie Brown 5 170cm
Lucy Harlow 16 160cm
Jame Horde 11 18
Charrlot White 19 165cm
Jimmy Lutton 15 17 180cm
I intended to have a person class which has appropriate variables to stored data such as first name, surname, mark and age. 我打算创建一个Person类,该类具有适当的变量来存储数据,例如名字,姓氏,标记和年龄。
However when I tried to extract the line by line to get the data line and use string.split()
to break down the string to get the column. 但是,当我尝试逐行提取以获取数据行并使用
string.split()
分解字符串以获取列时。 Then I cannot determine the which data belong to which column. 然后,我无法确定哪些数据属于哪一列。
line = br.readLine()
will return "Charlie Brown 5 170cm" 将返回“ Charlie Brown 5 170cm”
and value = line.split("//s+");
和
value = line.split("//s+");
will return value[Charlie,Brown,5,170cm]
. 将返回
value[Charlie,Brown,5,170cm]
。 At this point I cannot determine which value is belong to which column. 在这一点上,我无法确定哪个值属于哪个列。
Please help 请帮忙
提取行之后,对于每一行,您可以使用indexOf
方法找到\\t
的索引,然后使用subString
提取部分。
If you file is tab separated then you should just split on the tab characters instead of 1 or more white-space characters. 如果文件是用制表符分隔的,则应仅在制表符上分开而不是1个或多个空格字符。
value = line.split("\t");
This will put the strings in the correct rows and empty strings if there is nothing there. 这将把字符串放在正确的行中,如果没有任何内容,则将空字符串放入。
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