1、查詢mongodb單個欄位的所有值內容：db.getCollection('amac').find({},{"managerName":1,"_id":0})    //PS："_id":0表示不顯示id值

java：

//mongoDB資料讀取,存入MYSQL資料庫
private static void readMongo(){
    Connection conn = MysqlUtil.getConnection();//連線mysql
Statement statement = null;
    MongoClient mongoClient=new MongoClient("119.xx.xx.xxx"
 
,27017);//連線mongoDB資料庫
DB database=mongoClient.getDB("row");//獲取資料庫
DBCollection collection = database.getCollection("amac");//集合名
DBCursor cursor = collection.find();
    System.out.println("從資料集中讀取資料：");
    while(cursor.hasNext()){
        BasicDBObject bdbObj = (BasicDBObject) cursor.next();
        if
 
(bdbObj != null){
            String managerName=bdbObj.getString("managerName");//讀取mongoDB資料庫row的amac集合的指定欄位managerName
try{
                statement  =conn.createStatement();
                String sql="insert into manager(managerName) values('"+managerName+"')";//存入mysql資料庫的機構列表
statement.execute(sql);
            } catch 
 
(SQLException e) {
                e.printStackTrace();
            }finally {
                if(null!=statement)
                {
                    try {
                        statement.close();
                    } catch (SQLException e) {
                        e.printStackTrace();
                    }
                }
            }
        }
    }
    System.out.println("over.");
}

其中getConnection()函式如下

//連線資料庫

private static Connection connection=null;
private static String username="user";
private static String password="password";
private static String DB_URL="jdbc:mysql://localhost:3306/mingzi?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8";
private static String DB_DRIVER="com.mysql.jdbc.Driver";