我有以下文档列表，List<Project> projectList
"projectsList": [
{
"projectNumber": 1
"projectName": "kjsd",
"projectURL": "lkjsand",
"projectDate": "Oct 7, 2016 12:00:00 AM",
"projectOccupation": "kaijiuhdsa",
"projectProposal": "aus asdig agduya"
},
{
"projectNumber": 2
"projectName": "alan walker",
"projectURL": "lkjsand",
"projectDate": "Oct 7, 2016 12:00:00 AM",
"projectOccupation": "kaijiuhdsa",
"projectProposal": "aus asdig agduya"
},
{
"projectNumber": 3
"projectName": "",
"projectURL": "",
"projectOccupation": "",
"projectProposal": ""
}
]
我有两个项目对象，其中包含
Project oldProject= new Project("kjsd","lkjsand","Oct 7, 2016 12:00:00 AM","kaijiuhdsa","aus asdig agduya")
我需要更新
Project newProject= new Project("kjsd","http","Oct 7, 2016 12:00:00 AM","kaijiuhdsa","ocr")
如何使用java驱动程序在mongoDB中用newProject更新oldProject？
最佳答案
我可以在 MongoDB 中回答。我想你可以将它转换成适当的Java方法。
db.col.update(
{"projectsList.projectNumber": 1},
{$set: {
"projectsList.$.projectUrl": "http",
"projectsList.$.projectProposal": "ocr"
}})
关于java - MongoDB - 更新文档列表中的对象，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40189492/