问题描述
我正在使用 。 我有点不知道如何向BasicDBObject插入/添加数组。 我遇到的所有示例都没有显示如何实现这一目标:( ..在下面的示例中，如何将Employees数组插入dbo对象中？
/*
{
"company" : "stackoverflow",
"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", "stackoverflow");
basicDBObject.put("established", "when I started coding");
System.out.println(basicDBObject.toString());
}
1楼
使用Arrays.asList作为列表的构造方法。
这只是一个清单。
.append()对象键而不是“ put”。
同样，它就像界面一样：
BasicDBObject basicDBObject = new BasicDBObject();
basicDBObject.put("company", "stackoverflow");
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());