MongoDB_Java连接mongo 使用Java程序更新集合中的文档

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之前mongo数据库内容

代码

import com.mongodb.BasicDBObject;import com.mongodb.DB;import com.mongodb.DBCollection;import com.mongodb.MongoClient;import com.mongodb.WriteResult;/** * 使用Java程序更新集合中的文档 */public class JavaDocUpDate {    public static void main(String[] args) {        try {            MongoClient mongoClient = new MongoClient("localhost", 27017);            DB db = mongoClient.getDB("test");            DBCollection dbCollection = db.getCollection("user");            BasicDBObject query = new BasicDBObject("name", "C++");            BasicDBObject update = new BasicDBObject("name","CCC");            WriteResult result = dbCollection.update(query, update);            System.out.println(result.toString());        } catch (Exception e) {            e.printStackTrace();        }    }}

之后

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