MongoDB Java操作MongoDB

为了连接 MongoDB 数据库，Java 项目包括以下步骤。在这里，我们正在创建一个 maven 项目并为 mongodb-driver 提供依赖。

1）创建一个Maven项目

2）添加依赖到POM文件

// pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.yiidian</groupId>
    <artifactId>java-mongo-db</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>
    <name>java-mongodb</name>
    <dependencies>
        <dependency>
            <groupId>org.mongodb</groupId>
            <artifactId>mongodb-driver</artifactId>
            <version>3.4.2</version>
        </dependency>
    </dependencies>
</project>

3) 创建 Java 文件

创建一个 Java 文件并编写代码来创建连接。

// JavaMongoDemo.java

package com.yiidian.java.mongo.db;

import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import org.bson.Document;

public class JavaMongoDemo {
    public static void main(String[] args) {
        try {
//---------- Connecting DataBase -------------------------//  
            MongoClient mongoClient = new MongoClient("localhost", 27017);
//---------- Creating DataBase ---------------------------//  
            MongoDatabase db = mongoClient.getDatabase("javatpoint");
//---------- Creating Collection -------------------------//  
            MongoCollection<Document> table = db.getCollection("employee");
//---------- Creating Document ---------------------------//    
            Document doc = new Document("name", "Peter John");
            doc.append("id", 12);
//----------- Inserting Data ------------------------------//  
            table.insertOne(doc);
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}