如何 insert/put BasicDBObject 中的 json 数组

Question

我正在使用 mongo db driver 2.11.2。我有点困惑如何 insert/add 一个数组到 BasicDBObject。我遇到的所有示例都没有显示如何实现这一点:(。在下面的示例中，我将如何在 dbo 对象中插入员工数组？

 /*
    {
    "company" : "Whosebug",
    "established": "when I started coding"
    "employees":[
        {"firstName":"John", "lastName":"Doe"},
        {"firstName":"Anna", "lastName":"Smith"},
        {"firstName":"Peter", "lastName":"Jones"}
       ]
    }
     */

    BasicDBObject basicDBObject = new BasicDBObject();
    basicDBObject.put("company", "Whosebug");
    basicDBObject.put("established", "when I started coding");
    System.out.println(basicDBObject.toString());

}

Answer 1

使用 Arrays.asList 作为列表的构造函数。这只是一个列表。 .append() 对象键而不是 "put"。同样，它就像 HashMap 接口：

    BasicDBObject basicDBObject = new BasicDBObject();
    basicDBObject.put("company", "Whosebug");
    basicDBObject.append("established", "when I started coding");
    basicDBObject.append("employees", Arrays.<DBObject>asList(
        new BasicDBObject("firstName", "john")
            .append("lastName", "doe"),
        new BasicDBObject("firstName", "anna")
            .append("lastName", "smith"),
        new BasicDBObject("firstName", "peter")
            .append("lastName", "jones")
    ));
    System.out.println(basicDBObject.toString());

如何 insert/put BasicDBObject 中的 json 数组

how to insert/put a json array in the BasicDBObject

java

arrays

json

mongodb

bson