Java連接MongoDB代碼示例

連接, 獲取db, collection, 增加, 刪除, 更新, 查詢等基本操作

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;
/**

對于mongon的測試

@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();

 // 獲取admin的數據庫
 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();
 // 獲取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("==============");
 }
 // 獲取表結果

}
@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());
     }
 }

}
}
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