问题描述
对于我的程序,我想从属性文件中读取一个键以及该键的相关值列表.
最近我也在这样尝试
For my program I want to read a key from a properties file and an associated List of values for the key.
Recently I was trying like that
public static Map<String,List<String>>categoryMap = new Hashtable<String, List<String>>(); Properties prop = new Properties(); try { prop2.load(new FileInputStream(/displayCategerization.properties)); Set<Object> keys = prop.keySet(); List<String> categoryList = new ArrayList<String>(); for (Object key : keys) { categoryList.add((String)prop2.get(key)); LogDisplayService.categoryMap.put((String)key,categoryList); } System.out.println(categoryList); System.out.println("Category Map :"+LogDisplayService.categoryMap); keys = null; prop = null; } catch (Throwable e) { e.printStackTrace(); }
我的属性文件如下 -
and my properties file is like below -
A=APPLE A=ALPHABET A=ANT B=BAT B=BALL B=BUS
我希望密钥 A 应该有一个列表,其中包含 [APPLE, ALPHABET,ANT] 和 B 包含 [BAT,BALL,BUS].
所以地图应该是这样的 {A=[APPLE, ALPHABET,ANT], B=[BAT,BALL,BUS]} 但我得到
{A=[ANT], B=[BUS]}
我在互联网上搜索了这种方法,但一无所获.我希望应该有办法.有什么帮助吗?
I want for key A there should be a list which contain [APPLE, ALPHABET,ANT] and B contain [BAT,BALL,BUS].
So Map should be like this {A=[APPLE, ALPHABET,ANT], B=[BAT,BALL,BUS]} but I get
{A=[ANT], B=[BUS]}
I searched on the internet for such a way but found nothing. I wish there should be a way.
Any help?
推荐答案
尝试将属性写成逗号分隔的列表,然后在加载属性文件后拆分值.例如
Try writing the properties as a comma separated list, then split the value after the properties file is loaded. For example
a=one,two,three b=nine,ten,fourteen
您也可以使用 org.apache.commons.configuration 并使用 AbstractConfiguration.setListDelimiter(char) 方法如果您在值中使用逗号.
You can also use org.apache.commons.configuration and change the value delimiter using the AbstractConfiguration.setListDelimiter(char) method if you're using comma in your values.