MongoDB -- JAVA基本API操作

 package com.example.mongodb.mongodb.demo;

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

 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;

 import static com.mongodb.client.model.Filters.*;

 /**
  * @author <a herf="mailto:yanwu0527@163.com">XuBaofeng</a>
  * @date 2019-07-01 14:52.
  * <p>
  * description:
  */
 public class MongoDbJdbc {
     /*** 地址 */
     private static final String MONGODB_ADDRESS = "127.0.0.1";
     /*** 端口 */
     private static final Integer MONGODB_PORT = 27017;
     /*** 数据库 */
     private static final String DATABASE_NAME = "yanwu";
     /*** 集合 */
     private static final String COLLECTION_NAME = "java";
     /*** 连接 */
     private static MongoClient mongoClient;
     /*** 数据库 */
     private static MongoDatabase database;
     /*** 集合 */
     private static MongoCollection<Document> collection;

     public static void main(String[] args) {
         // ----- 建立连接
         newMongoClient();
         // ----- 查看所有数据库
         listDatabases();
         // ----- 选择数据库
         getDatabase();
         // ----- 创建集合
         createCollection();
         // ----- 获取集合
         getCollection();
         // ----- 插入文档
         insert();
         // ----- 更新文档
         update();
         // ----- 删除文档
         delete();
         // ----- 检索所有文档
         findAll();
         // ----- 条件查找 (匹配)
         findByEq();
         // ----- 条件查找 [小于]
         findByLt();
         // ----- 条件查找 [小于等于]
         findByLte();
         // ----- 条件查找 [大于]
         findByGt();
         // ----- 条件查找 [大于等于]
         findByGte();
         // ----- 条件查找 [and]
         findByAnd();
         // ----- 条件查找 [or]
         findByOr();
     }

     /**
      * 建立连接
      */
     private static void newMongoClient() {
         System.out.println("==================== newMongoClient ====================");
         mongoClient = new MongoClient(MONGODB_ADDRESS, MONGODB_PORT);
     }

     /**
      * 查看所有数据库
      */
     private static void listDatabases() {
         System.out.println("==================== listDatabases ====================");
         MongoIterable<String> names = mongoClient.listDatabaseNames();
         for (String mane : names) {
             System.out.println(mane);
         }
     }

     /**
      * 获取数据库
      */
     private static void getDatabase() {
         System.out.println("==================== getDatabase ====================");
         database = mongoClient.getDatabase(DATABASE_NAME);
     }

     /**
      * 创建集合
      */
     private static void createCollection() {
         System.out.println("==================== createCollection ====================");
         database.createCollection(COLLECTION_NAME);
     }

     /**
      * 获取集合
      */
     private static void getCollection() {
         System.out.println("==================== getCollection ====================");
         collection = database.getCollection(COLLECTION_NAME);
     }

     /**
      * 插入文档
      */
     private static void insert() {
         System.out.println("==================== insert ====================");
         // ----- 插入一条文档
         Document document = new Document().append("title", "java").append("desc", "JAVA是我的衣食父母").append("by", "yanwu")
                 .append("tage", Collections.singletonList("java")).append("likes", 200);
         collection.insertOne(document);
         // ----- 插入多条文档
         List<Document> documents = new ArrayList<>();

         Document document1 = new Document().append("title", "php").append("desc", "PHP是世界上最好的语言").append("by", "yanwu")
                 .append("tage", Collections.singletonList("php")).append("likes", 100);
         documents.add(document1);

         Document document2 = new Document().append("title", "python").append("desc", "python是人工智能的未来").append("by", "yanwu")
                 .append("tage", Collections.singletonList("python")).append("likes", 250);
         documents.add(document2);

         Document document3 = new Document().append("title", "mongodb").append("desc", "学习学习").append("by", "yanwu")
                 .append("tage", Collections.singletonList("mongodb")).append("likes", 150);
         documents.add(document3);

         collection.insertMany(documents);
     }

     /**
      * 检索所有文档
      */
     private static void findAll() {
         System.out.println("==================== findAll ====================");
         // ----- 拿到该集合中所有的文档
         print(collection.find());
     }

     /**
      * 更新文档
      */
     private static void update() {
         System.out.println("==================== update ====================");
         collection.updateMany(eq("title", "java"), new Document("$set", new Document("title", "java语言")));
     }

     /**
      * 删除文档
      */
     private static void delete() {
         System.out.println("==================== delete ====================");
         // ----- 删除一个
         collection.deleteOne(eq("title", "java"));
         findAll();
         // ----- 删除多个
         collection.deleteMany(eq("by", "yanwu"));
         findAll();
     }

     /**
      * 条件查找 (匹配)
      */
     private static void findByEq() {
         System.out.println("==================== findByEq: likes == 200 ====================");
         print(collection.find(eq("likes", 200)));
     }

     /**
      * 条件查找 [小于]
      */
     private static void findByLt() {
         System.out.println("==================== findByLt: likes < 200 ====================");
         print(collection.find(lt("likes", 200)));
     }

     /**
      * 条件查找 [小于等于]
      */
     private static void findByLte() {
         System.out.println("==================== findByLte: likes <= 200 ====================");
         print(collection.find(lte("likes", 200)));
     }

     /**
      * 条件查找 [大于]
      */
     private static void findByGt() {
         System.out.println("==================== findByGt: likes > 200 ====================");
         print(collection.find(gt("likes", 200)));
     }

     /**
      * 条件查找 [大于等于]
      */
     private static void findByGte() {
         System.out.println("==================== findByGte: likes >= 200 ====================");
         print(collection.find(gte("likes", 200)));
     }

     /**
      * 条件查找 [and]
      */
     private static void findByAnd() {
         System.out.println("==================== findByGte: likes > 150 && likes < 250 ====================");
         print(collection.find(and(gt("likes", 150), lt("likes", 250))));
     }

     /**
      * 条件查找 [or]
      */
     private static void findByOr() {
         System.out.println("==================== findByGte: likes < 150 || likes > 200 ====================");
         print(collection.find(or(lt("likes", 150), gt("likes", 200))));
     }

     /**
      * 打印输出文档集合
      */
     private static void print(FindIterable<Document> documents) {
         for (Document document : documents) {
             System.out.println(document.toJson());
         }
     }
 }

更多详情可以查看: http://mongodb.github.io/mongo-java-driver/3.0/driver/getting-started/