Java MongoDB Save Pictures

This article describes how to save a picture file to MongoDB using the GridFS API.The GridFS API can also save other binary files, such as video and music files. 1. Save pictures The following code uses the photo namespace, and the new filename saves the picture to MongoDB. String newFileName = "mkyong-java-image"; File imageFile = new ...

Posted on Mon, 29 Jun 2020 12:24:51 -0400 by NewPHP_Coder

Build Mongodb cluster in detail under centos7

1, Mongodb cluster (no SQL Library) cluster construction 1. For the topology of Mongo cluster, let's have a brief understanding2. Install mongodb to node1, 2, and 3 nodes (the following operations should be performed on node1, 2, and 3 nodes, xshell is recommended) (1) Configure mongo's yum source Com ...

Posted on Mon, 29 Jun 2020 03:12:11 -0400 by madhukar_garg

mongoDB and pymongo learning

Contents of this article The foregoing install linux Installation docker container deployment Windows setup use GUI viewer Differences between mongoDB and relational database mongoDB basic syntax pymongo module usage The foregoing mongoDB should be a non relational database according to the ...

Posted on Fri, 26 Jun 2020 04:24:11 -0400 by vertmonkee

mongoDB uses rockMongo for graphical management (with related configuration and detailed process of Nginx)

mongoDB uses rockMongo for graphical management (with related configuration and detailed process of Nginx) 1, Background As we all know, mongoDB is a NoSql database, which is mainly used to store document types and cold data. Usually, when we do the CURD of mongo, we operate in a small black window, a ...

Posted on Sat, 20 Jun 2020 23:19:23 -0400 by exponder

Installation of MongoDB visualizer and start of server

Install MongoDB and start server 1.Download mongoDB service: (version 3.1.2) 2. Install - > select custom - > install next 3. Create a new empty directory on the local disk. The location should not be too deep. For example, C:\db is used to store data files 4. Run mongoDB service: enter the bi ...

Posted on Sat, 13 Jun 2020 03:30:44 -0400 by andy75180

MongoDB Quick Start, that's all right!

SpringBoot e-commerce project mall (30k+star) address: https://github.com/macrozheng/mall abstract Although relational databases are still the mainstream now, it is necessary to learn a mainstream NOSQL database to supplement them when facing some requirements.MongoDB is a rich NoSQL database. This introductory tutorial is organized from its m ...

Posted on Mon, 08 Jun 2020 21:26:03 -0400 by d_priyag

BitArray is good, but don't abuse it. Another online memory boom

One: Background 1. Storytelling Last month I wrote a blog about using bitmap to compress the original List <CustomerID>with high intensity, which compresses the original List memory nearly 106 times, but bitmap is not always good. You must make it in the right scene.Instead of abusing with closed eyes, the corresponding set of bitmaps in ...

Posted on Thu, 21 May 2020 20:59:50 -0400 by ealderton

Spring Batch Batch Practice for Spring Boot

Practice content Read 100,000 records from a table in MariaDB and write them to MongoDB after processing. Specific implementation 1. Create a new Spring Boot application that relies on the following: <!-- Web application --> <dependency> <groupId>org.springframework.boot</groupId> ...

Posted on Sat, 16 May 2020 12:48:19 -0400 by gauss

MongoDB Quick Start Guide and docker-compose Quick Experience

Advantages of MongoDB over RDBMS Less Schemas - MongoDB is a document database where a collection contains different documents.The number of fields, content, and document size may vary between documents. The structure of a single object is clear. There are no complex joins. In-depth query capabilities.MongoDB supports dynamic querying of docum ...

Posted on Thu, 14 May 2020 12:58:34 -0400 by thinkgfx

Import collection of mongodb

The company is using mongodb database, which is relatively convenient. Today, we need to use the robot mongodb database tool to import Import steps: Log in to your mongodb server, and we will install it on liunx, so we need to ssh to the server Step 2: import the file into the directory specified by the server; Step 3: enter the mongo insta ...

Posted on Tue, 05 May 2020 18:11:01 -0400 by 2DaysAway