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我正在尝试为项目加载一些本体。现在我使用bioportal的本体，其中一些非常重，200 mb或400 mb，并且java需要花费大量的时间来加载它们。如何使用jena快速加载ontolgy？
我不知道我是否以正确的方式加载文件或有任何解决方法，使加载时间更小。
这是我的代码，我在那里装载本体的一部分：
System.out.println("loading the model...");
model = ModelFactory.createOntologyModel(OntModelSpec.OWL_LITE_MEM);
listPaths = new LinkedList();
//sc = new Scanner(System.in);
try{
if(args[0].equals("0")){
InputStream in = new FileInputStream("ontologies/camera.owl");
model.read(in, null);
NS = NS0;
in.close();
}else if(args[0].equals("1")){
InputStream in = new FileInputStream("ontologies/NCITNCBO.owl");
model.read(in, null);
NS = NS1;
//in.close();
}else if(args[0].equals("2")){
InputStream in = new FileInputStream("ontologies/HL7.ttl");
model.read(in,null, "TTL");
NS = "http://purl.bioontology.org/ontology/HL7/";
in.close();
}else if(args[0].equals("3")){
InputStream in = new FileInputStream("ontologies/LOINC.ttl");
model.read(in,null, "TTL");
NS = "http://purl.bioontology.org/ontology/LNC/";
in.close();
}
}catch(Exception e){
System.out.println("erro: " + e.getMessage());
}
System.out.println("Ontology loaded!");
//some info about the ontology
int maxChildcount = 0;
int numClasses = 0;
int numChilds = 0;
int numChildsClass = 0;
Iterator i = model.listClasses();
while(i.hasNext()){
numClasses++;
OntClass c = (OntClass) i.next();
//get num childs
if(c.hasSubClass()){
Iterator i2 = c.listSubClasses();
while(i2.hasNext()){
i2.next();
numChilds++;
numChildsClass++;
}
if(numChildsClass > maxChildcount)
maxChildcount = numChildsClass;
}
numChildsClass = 0;
}
System.out.println("NumChilds: " + numChilds + " MaxChildCLass: " + maxChildcount + " numClasses: " + numClasses);
System.out.println("Paths for class: " + NS + args[1]);