Java ini4j - reading multiple options from .ini fi

问题:

I'm trying to read multiple values using ini4j, the docs say it should be possible with the Options class.

Here is my sample .ini file (./dwarfs.ini)

[dopey]
age = 23
fortuneNumber = 11
fortuneNumber = 33
fortuneNumber = 55

here is the code to read it:

Ini ini = new Ini();
Config conf = new Config();
conf.setMultiOption(true);
ini.setConfig(conf);
ini.load(new FileReader("./dwarfs.ini"));

but fortuneNumber property is just 55 after reading and I'd want it to be an array or a list, anything.

回答1:

The web presence for the ini4j project contains (among others) very simple tutorials. One of these tutorials explains, how to retrieve multiple values. How could you expect to get a list or an array, when using a fetch method that returns a single reference? Look at the API!

In the tutorial, there is a part explaining multi values:

[ini4j] library introduces MultiMap interface, which is extends normal Map, but allows multiply values per keys. You can simply index values for a given key, similar to indexed properties in JavaBeans api.

There is also an example:

String n1 = sneezy.get("fortuneNumber", 0);  // = 11
String n2 = sneezy.get("fortuneNumber", 1);  // = 22
String n3 = sneezy.get("fortuneNumber", 2);  // = 33
String n4 = sneezy.get("fortuneNumber", 3);  // = 44

In this example, sneezy is a Section, but it should also work with an Ini.

And just to make it complete: An Ini also knows a method List<V> getAll(Object key).

回答2:

to handle mutliple properties in section use following code :

Ini oINI = new Wini();
Config conf = new Config();
conf.setMultiOption(true);
oINI.setConfig(conf);
oINI.load(new File("....../myfile.ini"));

Do not directly open the INI file in the class creation, set options before, otherwise the options won't be used and by default MultiOption si set to "false".

Have searched a while for this solution.

回答3:

1. you need setConfig first, and then load file.
2. you need use List to handle multiple same values.

here the example:

Ini ini = new Wini();

Config config = new Config();
config.setMultiOption(true);
config.setMultiSection(true);

ini.setConfig(config);   //set config

ini.load(new File(filename));      // load AFTER setConfig

for (String sectionName : ini.keySet()) {
    List<Section> sectionList = ini.getAll(sectionName);  // use List
    for (Section section : sectionList) {
        for (String optionName : section.keySet()) {
            List<String> optionList = section.getAll(optionName);
            for (String optionVaule : optionList) {
                System.out.printf("%s %s %s\n", sectionName, optionName, optionVaule);
            }
        }
    }
}

here the out put:

dopey age 23
dopey fortuneNumber 11
dopey fortuneNumber 33
dopey fortuneNumber 55