[英]How can I format the data written to a text file to be done in columns?
Hi I have a bunch of data Im writing to a text file, each line of the rows holds about 4 different pieces of data, I want to make it so that each type is data is aligned in rows. 嗨我有一堆数据我正在写入文本文件,每行的行包含大约4个不同的数据,我想让它成为每个类型的数据在行中对齐。
Here is the line that writes the data. 这是写入数据的行。
output.write(aName + " " + aObjRef + " " + aValue + " " + strDate + " " + note + (System.getProperty("line.separator")));
Here is how the data looks when written right now. 以下是现在编写时数据的外观。
CR_2900_IPGR_AL 2900.EV2 Alarm 111107
CR_2900_IMPT_AL 2900.EV311 Alarm 111107
CR_STH_CHL_AL 2900.EV315 Alarm 111107
CR_OAT_AL 2900.EV318 Alarm 111107
SLB_102_2270A Temp Event 60215.EV1 Fault 111107
MACF_70300_IMPT_AL 70300.EV2 Alarm 111107
And here is how Id like it to look 以下是我喜欢它的样子
CR_2900_IPGR_AL 2900.EV2 Alarm 111107
CR_2900_IMPT_AL 2900.EV311 Alarm 111107
CR_STH_CHL_AL 2900.EV315 Alarm 111107
CR_OAT_AL 2900.EV318 Alarm 111107
SLB_102_2270A Temp Event 60215.EV1 Fault 111107
MACF_70300_IMPT_AL 70300.EV2 Alarm 111107
Have a look at the Formatter
class, or the String.format(String format, Object... args)
method. 查看Formatter
类或String.format(String format, Object... args)
方法。
Try this for instance: 试试这个例子:
String formatStr = "%-20s %-15s %-15s %-15s %-15s%n";
output.write(String.format(formatStr, aName, aObjRef, aValue, strDate, note));
(Note that %n
will automatically use the platform-specific line separator.) (请注意, %n
将自动使用特定于平台的行分隔符。)
There are a number of options, but the easiest is to use String.format()
. 有许多选项,但最简单的是使用String.format()
。 See format string details for more info , but roughly: 有关详细信息 ,请参阅格式字符串详细信息
String.format("%-20s %-10s ...etc...", aName, aObjRef, ...etc...);
You can use the String.format command to do something like: 您可以使用String.format命令执行以下操作:
output.write("%20s %20s %20s %20s%s".format(
aName, aObjRef, aValue, strDate, note, System.getProperty("line.separator")
);
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