1.Java访问MongoDB
pom.xml
代码语言：javascript
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<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 https://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>mongoDB</groupId> <artifactId>mongoDB</artifactId> <version>0.0.1-SNAPSHOT</version> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>17</maven.compiler.source> <maven.compiler.target>17</maven.compiler.target> <maven-compiler-plugin-version>3.8.1</maven-compiler-plugin-version> </properties> <dependencies> <dependency> <groupId>org.mongodb</groupId> <artifactId>mongo-java-driver</artifactId> <version>3.12.10</version> </dependency> </dependencies> </project>
Java程序
代码语言：javascript
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package mongoDB; import com.mongodb.MongoClient; import com.mongodb.client.FindIterable; import com.mongodb.MongoClientURI; import com.mongodb.client.MongoDatabase; import com.mongodb.client.MongoCollection; import com.mongodb.client.MongoCursor; import org.bson.Document; public class MongoDB { // MongoDB服务器的连接URI public static String uri = "mongodb://192.168.31.184:27017"; // 创建MongoClient实例 public static MongoClientURI clientURI = new MongoClientURI(uri); public MongoClient mongoClient = new MongoClient(clientURI); public MongoDatabase connect(String dbname) { // 连接成功，可以进行数据库操作 System.out.println("Connected to MongoDB"); // 获取数据库实例 MongoDatabase database = mongoClient.getDatabase(dbname); return database; } public void disconnect() { // 关闭连接 this.mongoClient.close(); } public MongoCollectiongetCollection(MongoDatabase database,String mycollection) { // 获取集合实例 MongoCollection collection = database.getCollection(mycollection); return collection; } public void insertDocument(String key,String value,MongoCollectioncollection) { // 插入文档 Document document = new Document(key, value) .append("age", 40); collection.insertOne(document); } public void searchDocument(String key,String value,MongoCollectioncollection) { // 查询文档 Document query = new Document(key, value); MongoCursor cursor = collection.find(query).iterator(); while (cursor.hasNext()) { Document result = cursor.next(); System.out.println(result.toJson()); } } public void ViewAllDocument(MongoCollectioncollection) { FindIterable iterable = collection.find(); for (Document document : iterable) { System.out.println(document.toJson()); } } public void updateDocument(String key_filter,String value_filter,String key_update,String value_update,MongoCollectioncollection) { // 更新文档 Document filter = new Document(key_filter,value_filter); Document update = new Document("$set", new Document(key_update,value_update)); collection.updateOne(filter, update); } public void updateDocument(String key_filter,String value_filter,String key_update,int value_update,MongoCollectioncollection) { // 更新文档 Document filter = new Document(key_filter,value_filter); Document update = new Document("$set", new Document(key_update,value_update)); collection.updateOne(filter, update); } public void deleteDocument(String key,String value,MongoCollectioncollection) { // 删除文档 Document filter = new Document(key, value); collection.deleteOne(filter); } public static void main(String[] args) { MongoDB mdb = new MongoDB(); MongoDatabase database = mdb.connect("admin"); MongoCollection collection = mdb.getCollection(database,"person"); System.out.println("显示全部"); mdb.ViewAllDocument(collection); System.out.println("显示一条"); mdb.searchDocument("name","Jerry",collection); mdb.insertDocument("name","Jhon",collection); System.out.println("插入一条Jhon"); mdb.ViewAllDocument(collection); mdb.updateDocument("name","Jhon","age",19,collection); System.out.println("修改Jhon，修改年龄为19"); mdb.ViewAllDocument(collection); mdb.deleteDocument("name","Jhon",collection); System.out.println("删除一条Jhon"); mdb.ViewAllDocument(collection); mdb.disconnect(); } }
输出
代码语言：javascript
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{"_id": {"$oid": "66d7de35f5f38e175c5e739c"}, "name": "Jerry", "age": 28} {"_id": {"$oid": "66d7decaf5f38e175c5e739d"}, "name": "Tom", "age": 37} {"_id": {"$oid": "66d7df39f5f38e175c5e739e"}, "name": "Cindy", "age": 43} {"_id": {"$oid": "66d7df39f5f38e175c5e739f"}, "name": "Linda", "age": 21} {"_id": {"$oid": "66d7df39f5f38e175c5e73a0"}, "name": "Jessca", "age": 34} {"_id": {"$oid": "66d7de35f5f38e175c5e739d"}, "name": "Jerry", "age": 24} 显示一条 {"_id": {"$oid": "66d7de35f5f38e175c5e739c"}, "name": "Jerry", "age": 28} {"_id": {"$oid": "66d7de35f5f38e175c5e739d"}, "name": "Jerry", "age": 24} 插入一条Jhon {"_id": {"$oid": "66d7de35f5f38e175c5e739c"}, "name": "Jerry", "age": 28} {"_id": {"$oid": "66d7decaf5f38e175c5e739d"}, "name": "Tom", "age": 37} {"_id": {"$oid": "66d7df39f5f38e175c5e739e"}, "name": "Cindy", "age": 43} {"_id": {"$oid": "66d7df39f5f38e175c5e739f"}, "name": "Linda", "age": 21} {"_id": {"$oid": "66d7df39f5f38e175c5e73a0"}, "name": "Jessca", "age": 34} {"_id": {"$oid": "66d7de35f5f38e175c5e739d"}, "name": "Jerry", "age": 24} {"_id": {"$oid": "66d9583818f1fa75230235a8"}, "name": "Jhon", "age": 40} 修改Jhon，添加年龄 {"_id": {"$oid": "66d7de35f5f38e175c5e739c"}, "name": "Jerry", "age": 28} {"_id": {"$oid": "66d7decaf5f38e175c5e739d"}, "name": "Tom", "age": 37} {"_id": {"$oid": "66d7df39f5f38e175c5e739e"}, "name": "Cindy", "age": 43} {"_id": {"$oid": "66d7df39f5f38e175c5e739f"}, "name": "Linda", "age": 21} {"_id": {"$oid": "66d7df39f5f38e175c5e73a0"}, "name": "Jessca", "age": 34} {"_id": {"$oid": "66d7de35f5f38e175c5e739d"}, "name": "Jerry", "age": 24} {"_id": {"$oid": "66d9583818f1fa75230235a8"}, "name": "Jhon", "age": 19} 删除一条Jhon {"_id": {"$oid": "66d7de35f5f38e175c5e739c"}, "name": "Jerry", "age": 28} {"_id": {"$oid": "66d7decaf5f38e175c5e739d"}, "name": "Tom", "age": 37} {"_id": {"$oid": "66d7df39f5f38e175c5e739e"}, "name": "Cindy", "age": 43} {"_id": {"$oid": "66d7df39f5f38e175c5e739f"}, "name": "Linda", "age": 21} {"_id": {"$oid": "66d7df39f5f38e175c5e73a0"}, "name": "Jessca", "age": 34} {"_id": {"$oid": "66d7de35f5f38e175c5e739d"}, "name": "Jerry", "age": 24}
2.Python访问MongoDB
代码语言：javascript
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pip install pymongo
代码
代码语言：javascript
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from pymongo import MongoClient # 连接到MongoDB实例 client = MongoClient('mongodb://192.168.31.184:27017/') # 选择数据库 db = client['admin'] # 选择集合（类似于SQL中的表） collection = db['person'] # 插入文档（类似于SQL中的记录） #collection.insert_one({'name': 'Alice', 'age': 25}) # 查询文档 result = collection.find_one({'name': 'Jerry'}) print(result)
