Java 操作MongoDB 基本操作

需要下载驱动，并且依赖不多说：

看代码：

package com.payment;import java.net.InetAddress;import java.net.UnknownHostException;import org.bson.Document;import com.mongodb.MongoClient;import com.mongodb.MongoClientOptions;import com.mongodb.ServerAddress;import com.mongodb.client.MongoCollection;import com.mongodb.client.MongoDatabase;  //不需要认证  public class LoginMongoDB {            /**      * 获得无密码验证的client      * @param ip      * @param port      * @return      */      public static MongoClient getClient(String ip,int port){          MongoClient client=null;          try {          MongoClientOptions.Builder build = new MongoClientOptions.Builder();          // 与数据最大连接数50          build.connectionsPerHost(50);          // 如果当前所有的connection都在使用中，则每个connection上可以有50个线程排队等待          build.threadsAllowedToBlockForConnectionMultiplier(50);          build.connectTimeout(1 * 60 * 1000);          build.maxWaitTime(2 * 60 * 1000);          MongoClientOptions options = build.build();          InetAddress inetAddress;                    inetAddress = InetAddress.getByName(ip);                    ServerAddress addr=new ServerAddress(inetAddress, port);//设置地址          client = new MongoClient(addr, options);          } catch (UnknownHostException e) {              // TODO Auto-generated catch block              e.printStackTrace();          }          return client;      }                  public static void main(String args[]) throws UnknownHostException {          MongoClientOptions.Builder build = new MongoClientOptions.Builder();          // 与数据最大连接数50          build.connectionsPerHost(50);          // 如果当前所有的connection都在使用中，则每个connection上可以有50个线程排队等待          build.threadsAllowedToBlockForConnectionMultiplier(50);          build.connectTimeout(1 * 60 * 1000);          build.maxWaitTime(2 * 60 * 1000);          MongoClientOptions options = build.build();          InetAddress inetAddress=InetAddress.getByName("127.0.0.1");          ServerAddress addr=new ServerAddress(inetAddress, 27017);//设置地址          MongoClient client = new MongoClient(addr, options);            // 获取数据库test,不存在的话，会自动建立该数据库          MongoDatabase db = client.getDatabase("mydb");            // 获取data集合，不存在的话，会自动建立该集合（相当于关系数据库中的数据表）          MongoCollection<Document> users = db.getCollection("ZF_FUNDINORDERPAYT");  //        Document document = new Document();  //        document.append("firstName", "lei");  //        document.append("address", "sichuan chengdu");  //        users.insertOne(document);          // MongoClient使用完后必须要close释放资源          for (Document cur : users.find()) {              System.out.println(cur.toJson());           }                  client.close();      }  }