Question

我正在尝试将所有数据库列入jlist，它的工作正常只有我无法列入JLIST的问题。

      private void dblist() throws UnknownHostException {
           MongoClient mongo = new MongoClient("localhost", 27017);
           java.util.List<String> dbs = mongo.getDatabaseNames();

           for (String a : dbs) {
                 System.out.println(a); // here i am already getting value 
                                        // just need to add into jlist 
                 System.out.println(a);

                 jlist.add(a); // adding value into Jlist but its giving 
                               // me error 
           }
      }
  }

System.out.println(a) result

Answer 1

你可以尝试这个转换吗？;

String[] x = new String[dbs.size()];
JList<String> list = new JList<>(dbs.toArray(x));

更新

请你试试这个;

yourJlist = new JList(dbs.toArray());

更新2：

此代码正在运行，为什么你不尝试这样;

MongoClient mongo = new MongoClient("localhost", 27017);
MongoCursor<String> dbs = mongo.listDatabaseNames().iterator();
while(dbs.hasNext()) {
    System.out.println(dbs.next());
}

Answer 2

我已经解决了，所以将来如果有人在寻找这个问题，他们可以参考这个答案。

使用mongodb java driver 3.4.2

mongodb到java jlist

  try{
    String host=hname.getText();
    String port=spport.getValue().toString();
    Integer pt = Integer.valueOf(port);                         
        try (MongoClient mongoClient = new MongoClient(new 
        ServerAddress(host, pt),            
                MongoClientOptions.builder()
                        .serverSelectionTimeout(2000)
                        .build())) {
            DB db = mongoClient.getDB( jlist.getSelectedValue().toString());
            DBbtn.setText("DB Connected");
            DBbtn.setBackground (new Color(109,184,0));
            DBbtn.setForeground(Color.WHITE);
            Set<String> colls = db.getCollectionNames();

            DefaultListModel listModel = new DefaultListModel();
            colls.stream().map((s) -> {
                listModel.addElement(s);
                return s;
            }).forEach((s) -> {
                System.out.println(s);
            });
            collectionss.setModel(listModel); // collectionss is jlist name 
        }

   } catch (Exception e) {
   }

从java jlist插入到MongoDb

 try{        
        String logid="Log-"+logname.getText();
        JList dataList=(loglist);
        int sixe=dataList.getModel().getSize();
    ArrayList arrayList = new ArrayList();
    for (int i = 0; i <sixe; i++) {
    arrayList.add(dataList.getModel().getElementAt(i));
     server.total.setText("Total Log-"+i);

    }
    System.out.println(arrayList);
    Iterator itr = arrayList.iterator();
     String host=hname.getText();
    String port=spport.getValue().toString();                     
     MongoClient mongoClient = new MongoClient(asList( new ServerAddress(host+":"+port)),
                                     singletonList(MongoCredential.createCredential(uname.getText(),
                                                                                    dbname.getText(),
                                                                                    pass.getText().toCharArray())),
                                     MongoClientOptions.builder().serverSelectionTimeout(2000).build());

       DB db = mongoClient.getDB( jlist.getSelectedValue().toString());
       DBCollection bookCollection = 
       db.getCollection(collectionss.getSelectedValue().toString());
        BasicDBObject doc = new BasicDBObject(logid, arrayList);
        bookCollection.insert(doc);
        server.consolelog.setText("INFO: Data is inserted succsesfully");

         }catch(Exception e){
          server.consolelog.setText(e.toString());
         }

从mongodb向jlist java添加值

2 个答案: