MongoDB_Java连接mongo 使用Java程序更新集合中的文档

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