如何使用Java从MongoDB中的所有文档中获取相同密钥的值?
我是mongodb的新手。这是我的Mongodb文档,我只需要名称值
{
"_id" : ObjectId("5da527f784a58d78fcd0b177"),
"name" : "Jabed",
"email" : "jabed@gmail.com",
"Sex" : "male",
"age" : "19",
"address" : "Kochukhet, Dhaka",
"Contct" : "01797259329"
}
{
"_id" : ObjectId("5da6f415f2bdee4b90cf41d0"),
"name" : "Bulbul Gulzer Deb",
"email" : "gulzer.deb@gmail.com",
"Sex" : "male",
"age" : "19",
"address" : "Narinda, Dhaka",
"Contct" : "01756223666"
}
{
"_id" : ObjectId("5dd771907607c3e12d9183d7"),
"name" : "Aniruddha Dey",
"email" : "aniruddha.dey@gmail.com",
"Sex" : "male",
"age" : "14",
"address" : "Narinda, Dhaka",
"Contct" : "01745706020"
}
预期产出将为
Jabed
Bulbul Gulzer Deb
Aniruddha Dey
# 1 楼答案
使用投影:
可以在here中找到对投影字段的更多控制