Java MongoDB连接

要与MongoDB数据库连接，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提供依赖项。

请按照以下步骤操作:

1)创建一个Maven项目

2)将Dependecy添加到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.lidihuo</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Java文件并编写代码以创建连接。

//JavaMongoDemo.java

package com.lidihuo.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("lidihuo");
//---------- 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);
}
}
}