MongoDB下的查询操作（与Java API查询操作对应）

相关阅读：MongoDB Linux下的安装和启动 http://www.linuxidc.com/Linux/2011-05/36309.htmMongoDB下的高级查询示例 http://www.linuxidc.com/Linux/2011-05/36312.htmMongoDB Java API for 插入和单collection基本查询使用示例 http://www.linuxidc.com/Linux/2011-05/36313.htmMongoDB下的查询操作（与Java API查询操作对应） http://www.linuxidc.com/Linux/2011-05/36314.htm[root@localhost ~]# mongo
MongoDB shell version: 1.8.1
connecting to: test
> db
test
> show collections
data_test
system.indexes
system.users
> db.system.users.find（）
{ "_id" : ObjectId（"4dd73c7d247cb75e4995757b"）, "user" : "iwtxokhtd", "readOnly" : false, "pwd" : "c728e00401a72282a2919648723dbff7" }
> db.data_test.find（）
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a30"）, "userId" : "10010171", "userName" : "Bill Tu1", "gender" : "m1", "interests" : { "game" : "game1", "ball" : "ball1", "other" : "nothing1" } }
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a31"）, "userId" : "10010172", "userName" : "Bill Tu2", "gender" : "m2", "interests" : { "game" : "game2", "ball" : "ball2", "other" : "nothing2" } }
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a32"）, "userId" : "10010173", "userName" : "Bill Tu3", "gender" : "m3", "interests" : { "game" : "game3", "ball" : "ball3", "other" : "nothing3" } }
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a33"）, "userId" : "10010174", "userName" : "Bill Tu4", "gender" : "m4", "interests" : { "game" : "game4", "ball" : "ball4", "other" : "nothing4" } }
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a34"）, "userId" : "10010175", "userName" : "Bill Tu5", "gender" : "m5", "interests" : { "game" : "game5", "ball" : "ball5", "other" : "nothing5" } }
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a35"）, "userId" : "10010176", "userName" : "Bill Tu6", "gender" : "m6", "interests" : { "game" : "game6", "ball" : "ball6", "other" : "nothing6" } }
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a36"）, "userId" : "10010177", "userName" : "Bill Tu7", "gender" : "m7", "interests" : { "game" : "game7", "ball" : "ball7", "other" : "nothing7" } }
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a37"）, "userId" : "10010178", "userName" : "Bill Tu8", "gender" : "m8", "interests" : { "game" : "game8", "ball" : "ball8", "other" : "nothing8" } }
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a38"）, "userId" : "10010179", "userName" : "Bill Tu9", "gender" : "m9", "interests" : { "game" : "game9", "ball" : "ball9", "other" : "nothing9" } }
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a39"）, "userId" : "100101710", "userName" : "Bill Tu10", "gender" : "m10", "interests" : { "game" : "game10", "ball" : "ball10", "other" : "nothing10" } }
> db.data_test.findOne（）
{
        "_id" : ObjectId（"4dd747cb3a491e68a1a84a30"）,
        "userId" : "10010171",
        "userName" : "Bill Tu1",
        "gender" : "m1",
        "interests" : {
                "game" : "game1",
                "ball" : "ball1",
                "other" : "nothing1"
        }
}
> db.data_test.find（{"userId":"10010171"}）
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a30"）, "userId" : "10010171", "userName" : "Bill Tu1", "gender" : "m1", "interests" : { "game" : "game1", "ball" : "ball1", "other" : "nothing1" } }
> db.data_test.find（{"userId":"10010171","userName":"Bill Tu1"}）
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a30"）, "userId" : "10010171", "userName" : "Bill Tu1", "gender" : "m1", "interests" : { "game" : "game1", "ball" : "ball1", "other" : "nothing1" } }
> db.data_test.find（{"userId":{$in:["10010171","10010172"]}}）
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a30"）, "userId" : "10010171", "userName" : "Bill Tu1", "gender" : "m1", "interests" : { "game" : "game1", "ball" : "ball1", "other" : "nothing1" } }
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a31"）, "userId" : "10010172", "userName" : "Bill Tu2", "gender" : "m2", "interests" : { "game" : "game2", "ball" : "ball2", "other" : "nothing2" } }
> db.data_test.find（{"userId":/10010171.*/i}）
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a30"）, "userId" : "10010171", "userName" : "Bill Tu1", "gender" : "m1", "interests" : { "game" : "game1", "ball" : "ball1", "other" : "nothing1" } }
{ "_id" : ObjectId（"4dd747cb3a491e68a1a84a39"）, "userId" : "100101710", "userName" : "Bill Tu10", "gender" : "m10", "interests" : { "game" : "game10", "ball" : "ball10", "other" : "nothing10" } }
>   MongoDB Java API for 插入和单collection基本查询使用示例Linux下MySQL保存进去数据为乱码的解决办法相关资讯 MongoDB

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