根据键值从属性文件中有选择地加载属性

Question

I have a property file which has values like

xxx.key1 = value1
xxx.key2 = value2

yyy.key3 = value3
yyy.key4 = value4

'xxx' and 'yyy' can be considered as 2 different namespaces. How do I load property file so that I can only load either property of 'xxx' or 'yyy' ?

Answer 1

Just read each line of the file and only pull back the values that match that namespace.

Scanner scan = new Scanner(new File("yourfilepath"));
Map<String,String> map = new HashMap<String, String>();
String value = "";
while(scan.hasNext())
{
    value = scan.nextLine();
    if(value.indexOf("xxx") != -1)
    {
        map.put(value.split(" = ")[0], value.split(" = ")[1]);
    }
}

//now map has your key value pairs

If your properties are like this

xxx.key1=value then in the split("=") (no spaces)