/* 连接数据库 */
public static IDBConnection connectDB(String DB_URL, String DB_USER,
 String DB_PASSWD, String DB_NAME) {
    return new DBConnection(DB_URL, DB_USER, DB_PASSWD, DB_NAME);
}
 
/* 从文件读取本体并将其存入数据库 */
public static OntModel createDBModelFromFile(IDBConnection con, String name,
   String filePath) {
    ModelMaker maker = ModelFactory.createModelRDBMaker(con);
    Model base = maker.createModel(name);
    OntModel newmodel = ModelFactory.createOntologyModel(
 getModelSpec(maker), base);
    newmodel.read(filePath);
    return newmodel;
}

/* 从数据库中得到已存入本体 */
public static OntModel getModelFromDB(IDBConnection con, String name) {
    ModelMaker maker = ModelFactory.createModelRDBMaker(con);
    Model base = maker.getModel(name);
    OntModel newmodel = ModelFactory.createOntologyModel(
 getModelSpec(maker), base);
    return newmodel;
}

public static OntModelSpec getModelSpec(ModelMaker maker) {
    OntModelSpec spec = new OntModelSpec(OntModelSpec.OWL_MEM);
    spec.setImportModelMaker(maker);
    return spec;
}

下面是测试的代码，先从文件中读取，让后存入数据库中，再从数据库中读出。
public static void test() {
    String DB_URL = "jdbc:mysql://localhost/expert";
    String DB_USER = "root";
    String DB_PASSWD = "root";
    String DB = "MySQL";
    String DB_DRIVER = "com.mysql.jdbc.Driver";
  
    try {
        Class.forName("com.mysql.jdbc.Driver");
    } catch (ClassNotFoundException e) {
        e.printStackTrace();
    }
  
    String filePath = "file:C://expert//Expert.rdf-xml.owl";
    IDBConnection con = JaneUtils.connectDB(DB_URL,DB_USER, DB_PASSWD, DB);
    System.out.println(con);
  
    JaneUtils.createDBModelFromFile(con, "expert",filePath);  
    OntModel model = JaneUtils.getModelFromDB(con, "expert");
    JaneUtils.SimpleReadOntology(model);
}

/* 简单读取本体中的各个class */
public static void SimpleReadOntology(OntModel model) {
    for (Iterator i = model.listClasses(); i.hasNext();) {
        OntClass c = (OntClass) i.next();
        System.out.println(c.getLocalName());
    }
}

此主题相关图片如下：

/*获取个体*/
public static void getInstance(OntModel model){
    String prix = "http://www.owl-ontologies.com/Expert.owl#";
    /*得到本体中的Expert类*/
    OntClass expert = model.getOntClass(prix + "Expert");
    //打印类名
    System.out.println(expert.getLocalName());
  
    //获得其所以个体
    ExtendedIterator it = expert.listInstances();
    //打印其个体
    while(it.hasNext()){
        Individual oi = (Individual)it.next();
        System.out.println(oi.getLocalName());
    }
}
网址http://jena.sourceforge.net/ontology/index.html有jena API操作OWL的介绍。

/* 获取个体及其属性值 */
public static void getInstance(OntModel model) {
    String NS = "http://www.owl-ontologies.com/Expert.owl#";
    /* 得到本体中的Expert类 */
    OntClass expert = model.getOntClass(NS + "Expert");
    // 打印类名
    System.out.println(expert.getLocalName());

    // 获得其所以个体
    ExtendedIterator it = expert.listInstances();
    // 打印其个体
    while (it.hasNext()) {
        Individual oi = (Individual) it.next();
        System.out.println(oi.getLocalName());

        for (Iterator ipp = expert.listDeclaredProperties(); ipp.hasNext();) {
            OntProperty p = (OntProperty) ipp.next();
            System.out.println("  associated property: " + p.getLocalName() + " : "+oi.getPropertyValue(p));
        }// property ends
    }
}

那查询的时候就不用SPARQL了，只要用SQL就行了吗？

望高手指点一下！
不胜感激！

我是在protege中创建个体的，导出来类和个体在一个OWL文件中，一块存入MySQL，
从数据库读出本体后可以用下面的方法可以读出个体：

/*获取个体*/
public static void getInstance(OntModel model){
    String prix = "http://www.owl-ontologies.com/Expert.owl#";
    /*得到本体中的Expert类*/
    OntClass expert = model.getOntClass(prix + "Expert");
    //打印类名

问一下 如果把Expert换成键盘输入的为什么不可以啊 如果想要换成键盘输入应该怎么办啊