Java操作MongoDB的增删改查代码

连接, 获取db, collection, 增加, 删除, 更新, 查询等基本操作

package com.zhongsou.mongo;    import java.net.UnknownHostException;  import java.util.List;  import java.util.Set;    import org.junit.Test;    import com.mongodb.BasicDBObject;  import com.mongodb.DB;  import com.mongodb.DBCollection;  import com.mongodb.DBCursor;  import com.mongodb.DBObject;  import com.mongodb.DBTCPConnector;  import com.mongodb.Mongo;  import com.mongodb.WriteResult;    /**   * 对于mongon的测试   *    * @author Gaojie   */  public class MongoDBTest {     Mongo m;   DBTCPConnector conn;   private DB db;     @Test   public void testMongo() throws UnknownHostException {    String host = "202.108.*.*";    m = new Mongo(host, 27017);    // m.get   }     @Test   public void testConntect() throws Exception {    testMongo();    System.out.println("Mongo: " + m);    conn = m.getConnector();    System.out.println("DBTCPConnector: " + conn.getServerAddressList());   }     @Test   public void testDB() throws Exception {    testMongo();    testConntect();      // 获取admin的数据库    db = m.getDB("gaojie");    System.out.println("DB=" + db);    boolean auth = db.authenticate("root", "123456".toCharArray());    System.out.println("auth=" + auth);   }     @Test   public void testGetAll() throws Exception {    testDB();    // 获取db里面的collection(表)    Set<String> names = db.getCollectionNames();      for (String name : names) {     System.out.println("CollectionName: " + name);     DBCollection coll = db.getCollection(name);     System.out.println("CollectionCount=" + coll.count());       DBCursor cursor = coll.find();     while (cursor.hasNext()) {      System.out.println("DBObject=" + cursor.next());     }       List<DBObject> objs = coll.getIndexInfo();     for (DBObject obj : objs) {      System.out.println("IndexInfo=" + obj);     }     System.out.println("==============");    }    // 获取表结果   }     @Test   public void testCollection() throws Exception {    testDB();      if (db.isAuthenticated()) {     for (String coll : db.getCollectionNames()) {      System.out.println("collection=" + coll);     }    }   }     @Test   public void testInsert() throws Exception {      testDB();      if (db.isAuthenticated()) {     DBCollection coll = db.getCollection("test");     DBObject obj = new BasicDBObject();     obj.put("name", "gaojie");     obj.put("age", 2403);     obj.put("md5", "546466sfsddfsd");     WriteResult wr = coll.insert(obj);     System.out.println("WriteResult=" + wr);    }   }     @Test   public void testInsertObj() throws Exception {      testDB();    if (db.isAuthenticated()) {     DBCollection coll = db.getCollection("test");     DBObject obj = new BasicDBObject();     obj.put("pepole", new User());       WriteResult wr = coll.insert(obj);     System.out.println("WriteResult=" + wr);    }   }     @Test   public void testRemove() throws Exception {    testDB();    if (db.isAuthenticated()) {     DBCollection coll = db.getCollection("test");     DBObject obj = new BasicDBObject();     // obj.put("name", "gaojie1");     obj.put("age", 110);     System.out.println("WriteResult=" + coll.remove(obj));    }   }     @Test   public void testUpdate() throws Exception {    testDB();      if (db.isAuthenticated()) {     DBCollection coll = db.getCollection("test");     DBObject obj = new BasicDBObject();     obj.put("name", "gaojie10");     obj.put("age", 110);       DBObject upObj = new BasicDBObject();     upObj.put("name", "gaojie10");       // upObj.put("age", 110);       System.out.println("WriteResult=" + coll.update(obj, upObj));    }   }     @Test   public void testQuery() throws Exception {    testDB();      if (db.isAuthenticated()) {     DBCollection coll = db.getCollection("test");     DBObject obj = new BasicDBObject();     // obj.put("name", "gaojie00");     obj.put("age", 110);       DBCursor cursor = coll.find(obj);     while (cursor.hasNext()) {      System.out.println("DBObject=" + cursor.next());     }    }   }  }