Android 連接MongoDB與基本操作

原創 只要你能好 2020-06-28 05:33

>> MongoDB簡介

    Mongodb，分佈式文檔存儲數據庫，由C++語言編寫，旨在爲WEB應用提供可擴展的高性能數據存儲解決方案。MongoDB是一個高性能，開源，無模式的文檔型數據庫,是當前NoSql數據庫中比較熱門的一種。它在許多場景下可用於替代傳統的關係型數據庫或鍵/值存儲方式。Mongo使用C++開發。

>> Mongo安裝參考

1）下載安裝包文件，解壓到某一文件夾下。

官方下載地址：http://www.mongodb.org/downloads

2）配置環境變量：在path後添加安裝路徑。

3）啓動Mongo數據庫：

進入“cmd”->鍵入“mongod --dbpath D:\amp\MongoDBDATA”

D:\amp\MongoDBDATA 表示數據庫文件存儲路徑

4）啓動Mongo客戶端：

mongo 127.0.0.1:27017/admin

 

>> Android 連接MongoDB

步驟1：下載並導入jar包到工程

步驟2：安裝MongoDB到PC端（參見MongoDB安裝）

步驟3：編寫代碼連接MongoDB實現簡單操作（增刪改查）

 

>> 代碼參考（Android端，也適用於java等工程）

C1.  MongoDBUtil.java

package com.hills.happytest.utils;

import java.util.List;

import org.bson.types.ObjectId;

import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.Mongo;

/**
 *  Class Name: MongoDBUtil.java
 *  Function:
 *  		The Util that MongoDB Operate.
 *     Modifications:   
 *  
 *  @author Gym Yung. 
 *  @DateTime 2014-10-29 下午1:56:49    
 *  @version 1.0
 */
public class MongoDBUtil {
	static Mongo connection = null;
	static DB db = null;
	public MongoDBUtil(String dbName) throws Exception
	{
		connection = new Mongo("10.0.2.2:27017");
		db = connection.getDB(dbName);
	}
	public static Mongo getConnection() {
		return connection;
	}


	/**
	 * Create a blanket collection.
	 * @param collName :collection name.
	 */
	public void createCollection(String collName)
	{
		DBObject dbs = new BasicDBObject();
		dbs.put("test", "test");
		db.createCollection(collName, dbs);
	}
	
	/**
	 * Insert dbObject into collection.
	 * @param dbObject
	 * @param collName
	 */
	public void insert(DBObject dbObject,String collName)
	{
		DBCollection collection = db.getCollection(collName);
		collection.insert(dbObject);
	}
	
	/**
	 * Insert dbObject list into collection.
	 * @param dbObjects
	 * @param collName
	 */
	public void insertBatch(List<DBObject> dbObjects,String collName)
	{
		DBCollection collection = db.getCollection(collName);
		collection.insert(dbObjects);
	}
	
	/**
	 * Delete data By Id.
	 * @param id
	 * @param collName
	 * @return
	 */
	public int deleteById(String id,String collName)
	{
		DBCollection collection = db.getCollection(collName);
		DBObject dbs = new BasicDBObject("_id", new ObjectId(id));
		int counts = collection.remove(dbs).getN();
		return counts;
	}
	
	/**
	 * Delete data By Condition.
	 * @param dbObject
	 * @param collName
	 * @return
	 */
	public int deleteByDbs(DBObject dbObject,String collName)
	{
		DBCollection collection = db.getCollection(collName);
		int count = collection.remove(dbObject).getN();
		return count;
	}
	
	/**
	 * Update Data.
	 * @param find
	 * @param update
	 * @param upsert
	 * @param multi
	 * @param collName
	 * @return
	 */
	public int update(DBObject find,DBObject update,boolean upsert,boolean multi,String collName)
	{
		DBCollection collection = db.getCollection(collName);
		int count = collection.update(find, update, upsert, multi).getN();
		return count;
	}
	
	/**
	 * Find Data With Page.
	 * @param ref
	 * @param keys
	 * @param start
	 * @param limit
	 * @param collName
	 * @return
	 */
	public DBCursor findWithPage(DBObject where,DBObject selection,int start,int limit,String collName)
	{
		DBCursor cursor = findNoPage(where, selection, collName);
		return cursor.limit(limit).skip(start);
	}
	
	/**
	 * Find Data No Page.
	 * @param ref
	 * @param keys
	 * @param collName
	 * @return
	 */
	public DBCursor findNoPage(DBObject where,DBObject selection,String collName)
	{
		DBCollection collection = db.getCollection(collName);
		DBCursor cursor = collection.find(where, selection);
		return cursor;
	}
}

C2. MongoDBDao.java


package com.hills.happytest.utils;

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


import com.mongodb.BasicDBObject;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;

/**
 *  Class Name: MongoDBDao.java
 *  Function:
 *  		The Data Dao that MongoDB Operate.
 *     Modifications:   
 *  
 *  @author Administrator 
 *  @DateTime 2014-10-29 下午1:57:58    
 *  @version 1.0
 */
public class MongoDBDao {
	private static MongoDBUtil mongoDb;
	// Init. MongoDBUtil.
	static{
		try {
			mongoDb = new MongoDBUtil("test");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	/**
	 * Test Create a blanket collection.
	 * @param collName :collection name.
	 */
	public void createCollectionTest(String collName)
	{
		mongoDb.createCollection(collName);
	}
	
	/**
	 * Test Insert dbObject into collection.
	 * @param collName Collection Name.
	 */
	public void insertTest(String collName)
	{
		DBObject dbs = new BasicDBObject();
		dbs.put("name", "gymyung");
		dbs.put("age", 20);
		List<String> books = new ArrayList<String>();
		books.add("EXTJS");
		books.add("MONGDB");
		books.add("JAVA");
		dbs.put("books", books);
		mongoDb.insert(dbs, collName);
	}
	
	/**
	 * Test Insert dbObject list into collection.
	 * @param collName Collection Name.
	 */
	public void insertBatchTest(String collName)
	{
		List<DBObject> dbObjects = new ArrayList<DBObject>();
		DBObject jim2 = new BasicDBObject("name", "jim2");
		DBObject liuting = new BasicDBObject();
		liuting.put("name", "liuting");
		liuting.put("age", "22");
		
		dbObjects.add(jim2);
		dbObjects.add(liuting);
		
		mongoDb.insertBatch(dbObjects, collName);
	}
	
	/**
	 * Test Delete data By Id.
	 * @param collName Collection Name.
	 * @return Operate Result Code.
	 */
	public int deleteByIdTest(String collName)
	{
		int counts = mongoDb.deleteById("54507d19cbbd7a385c129ef5", collName);
		return counts;
	}
	
	/**
	 * Test Delete data By Condition.
	 * @param collName Collection Name.
	 * @return Operate Result Code.
	 */
	public int deleteByDbsTest(String collName)
	{
		DBObject jim2 = new BasicDBObject("name", "jim2");
		int count = mongoDb.deleteByDbs(jim2, collName);
		return count;
	}
	
	/**
	 * Test Update Data.
	 * @param collName Collection Name.
	 * @return Operate Result Code.
	 */
	public int updateTest(String collName)
	{
		DBObject liuting = new BasicDBObject();
		DBObject liuting2 = new BasicDBObject();
		liuting2.put("$set", new BasicDBObject("gender", "female"));
		
		int count = mongoDb.update(liuting, liuting2, false, true, collName);
		return count;
	}
	
	/**
	 * Test Find Data With Page.
	 * @param collName Collection Name.
	 * @return String List Result.
	 */
	public List<String> findWithPageTest(String collName)
	{
		DBCursor cursor = mongoDb.findWithPage(null, null, 0, 3, collName);
		return convertCursorToList(cursor);
	}
	
	/**
	 * Test Find Data With Condition.
	 * @param collName Collection Name.
	 * @return String List Result.
	 */
	public List<String> findWithConditionTest(String collName)
	{
		DBObject where = new BasicDBObject();
		where.put("age", new BasicDBObject("$lte", 26));
		where.put("gender", "female");
		
		DBCursor cursor = mongoDb.findNoPage(where, null,collName);
		return convertCursorToList(cursor);
	}
	
	
	/**
	 * Test Find Data No Page.
	 * @param collName Collection Name.
	 * @return String List Result.
	 */
	public List<String> findNoPageTest(String collName)
	{
		DBObject keys = new BasicDBObject();
		keys.put("_id", false);
		keys.put("name", true);
		keys.put("age", true);
		
		DBCursor cursor = mongoDb.findNoPage(null, keys, collName);
		
		return convertCursorToList(cursor);
	}
	
	/**
	 * Convert Cursor To List.
	 * @param cursor Required DBCursor.
	 * @return String List Result.
	 */
	private List<String> convertCursorToList(DBCursor cursor)
	{
		List<String> results = new ArrayList<String>();
		while(cursor.hasNext())
		{
			DBObject dbObject = cursor.next();
			
			for(String key : dbObject.keySet())
			{
				results.add("{"+key+":"+dbObject.get(key)+"}");
			}
		}
		
		return results;
	}
}

C3. TestActivity.java


package com.hills.happytest;


import java.util.List;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

import com.hills.happytest.utils.MongoDBDao;
import com.hills.happytest.utils.MongoDBUtil;
/**
 *  Class Name: TestActivity.java
 *  Function:
 *  		Test MongoDB Operate on Android device.
 *     Modifications:   
 *  
 *  @author Gym Yung. 
 *  @DateTime 2014-10-29 下午1:53:40    
 *  @version 1.0
 */
public class TestActivity extends Activity implements OnClickListener{
	/************** Component in Layout. ***************/
	private Button mongoTestBtn1;
	private Button mongoTestBtn2;
	private Button mongoTestBtn3;
	private Button mongoTestBtn4;
	private Button mongoTestBtn5;
	private Button mongoTestBtn6;
	private Button mongoTestBtn7;
	private Button mongoTestBtn8;
	// The Object use to MongoDB Operate.
	private MongoDBDao mongoDbDao;
	// The Collection Name in MongoDB.
	private String collName = "androidDB";
	
	/************** Operate Code ********************/
	private final int CREATE_COLLECTION_TEST = 100;
	private final int INSERT_TEST = 101;
	private final int INSERT_BATCH_TEST = 102;
	private final int DELETE_BY_ID_TEST = 103;
	private final int DELETE_BY_DBS_TEST = 104;
	private final int UPDATE_TEST = 105;
	private final int FIND_WITH_PAGE_TEST = 106;
	private final int FIND_NOPAGE_TEST = 107;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.mongodb_test);
		
		findViewAndSetListener();
		
		mongoDbDao = new MongoDBDao();
	}

	/**
	 *  Function:
	 * 		Find View And Set Listener.
	 *  @author Administrator 
	 *  @DateTime 2014-10-29 下午1:08:50
	 */
	private void findViewAndSetListener() {
		mongoTestBtn1 = (Button) findViewById(R.id.mongodb_btn1);
		mongoTestBtn2 = (Button) findViewById(R.id.mongodb_btn2);
		mongoTestBtn3 = (Button) findViewById(R.id.mongodb_btn3);
		mongoTestBtn4 = (Button) findViewById(R.id.mongodb_btn4);
		mongoTestBtn5 = (Button) findViewById(R.id.mongodb_btn5);
		mongoTestBtn6 = (Button) findViewById(R.id.mongodb_btn6);
		mongoTestBtn7 = (Button) findViewById(R.id.mongodb_btn7);
		mongoTestBtn8 = (Button) findViewById(R.id.mongodb_btn8);
		
		mongoTestBtn1.setOnClickListener(this);
		mongoTestBtn2.setOnClickListener(this);
		mongoTestBtn3.setOnClickListener(this);
		mongoTestBtn4.setOnClickListener(this);
		mongoTestBtn5.setOnClickListener(this);
		mongoTestBtn6.setOnClickListener(this);
		mongoTestBtn7.setOnClickListener(this);
		mongoTestBtn8.setOnClickListener(this);
	}


	@Override
	public void onClick(View v) {
		MyAsyncTast myAsyncTast = new MyAsyncTast();
		switch(v.getId()){
		case R.id.mongodb_btn1:
			myAsyncTast.execute(CREATE_COLLECTION_TEST);
			break;
		case R.id.mongodb_btn2:
			myAsyncTast.execute(INSERT_TEST);
			break;
		case R.id.mongodb_btn3:
			myAsyncTast.execute(INSERT_BATCH_TEST);
			break;
		case R.id.mongodb_btn4:
			myAsyncTast.execute(DELETE_BY_ID_TEST);
			break;
		case R.id.mongodb_btn5:
			myAsyncTast.execute(DELETE_BY_DBS_TEST);
			break;
		case R.id.mongodb_btn6:
			myAsyncTast.execute(UPDATE_TEST);
			break;
		case R.id.mongodb_btn7:
			myAsyncTast.execute(FIND_WITH_PAGE_TEST);
			break;
		case R.id.mongodb_btn8:
			myAsyncTast.execute(FIND_NOPAGE_TEST);
			break;
		}
	}
	
	
	/**
	 *  Class Name: TestActivity.java
	 *  Function:
	 *  		Execute Internet Task by Async...
	 *     Modifications:   
	 *  
	 *  @author Administrator 
	 *  @DateTime 2014-10-29 下午1:54:34    
	 *  @version 1.0
	 */
	class MyAsyncTast extends AsyncTask<Object, Object, Object>{

		@Override
		protected Object doInBackground(Object... params) {
			Object result = null;
			switch(Integer.parseInt(params[0].toString()))
			{
				case CREATE_COLLECTION_TEST:
					mongoDbDao.createCollectionTest(collName);
					break;
				case INSERT_TEST:
					mongoDbDao.insertTest(collName);
					break;
				case INSERT_BATCH_TEST:
					mongoDbDao.insertBatchTest(collName);
					break;
				case DELETE_BY_ID_TEST:
					result = mongoDbDao.deleteByIdTest(collName);
					break;
				case DELETE_BY_DBS_TEST:
					result = mongoDbDao.deleteByDbsTest(collName);
					break;
				case UPDATE_TEST:
					result = mongoDbDao.updateTest(collName);
					break;
				case FIND_WITH_PAGE_TEST:
					result = mongoDbDao.findWithPageTest(collName);
					break;
				case FIND_NOPAGE_TEST:
					result = mongoDbDao.findNoPageTest(collName);
					break;
			}
			return result;
		}
		
		@SuppressWarnings("unchecked")
		@Override
		protected void onPostExecute(Object result) {
			if(result instanceof Integer)
			{
				showDialogWithText("操作結果碼："+result.toString());
			}else if(result instanceof List)
			{
				String resText = "";
				for(String res : ((List<String>) result))
				{
					resText += res + "\n";
				}
				showDialogWithText("操作結果\n："+resText);
			}
			
			super.onPostExecute(result);
		}
	}
	
	
	/**
	 *  Function:
	 * 		Show Dialog With Text.
	 *  @author Administrator 
	 *  @DateTime 2014-10-29 下午1:21:34
	 *  @param text
	 */
	private void showDialogWithText(String text)
	{
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setIcon(R.drawable.ic_launcher);
		builder.setTitle("MongoDB操作結果");
		builder.setMessage(text);
		builder.setNeutralButton("確定", new DialogInterface.OnClickListener()
		{
			
			@Override
			public void onClick(DialogInterface dialog, int which)
			{
				dialog.dismiss();
			}
		});
		
		builder.create().show();
	}
	
	
	@Override
	protected void onDestroy() {
		// Close MongoDB Connection If It is Not Null.
		if(MongoDBUtil.getConnection() != null)
		{
			MongoDBUtil.getConnection().close();
		}
		super.onDestroy();
	}
}

C4.  添加權限

<uses-permission android:name="android.permission.INTERNET"/>

 

 

 

>> 運行結果



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