使用Java从mongodb检索数组值

我有以下代码：

DBCollection collsc = db.getCollection("StudentCourses") ; BasicDBObject querysc = new BasicDBObject("StudentID",id ); DBCursor curssc = collsc.find(querysc); while(curssc.hasNext()) { DBObject e = curssc.next(); System.out.println("You are currently registered for the following modules: ") ; System.out.println(e.get("CoursesRegistered")) ; } 

这输出：

 You are currently registered for the following modules: [ "DigitalLogic" "OperatingSystems" , "FundamentalsCSE"] 

但是我只希望从数组中返回值，即DigitalLogic，OperatingSystems和FundamentalsCSE。 我将使用这些值来填充JList。 请帮助？

Answer 1

尝试使用

 BasicDBList e = (BasicDBList) curssc.next().get("CoursesRegistered"); 

代替

 DBObject e = curssc.next(); 

然后从e.getIndex（index）获取值;