sqlite插入速度优化方案

Posted 2022-07-19 ihrthk

先贴上SQLiteOpenHelper的代码，我们创建测试的表是user，它有四个字段id,name,age,height,remark，测试用的小米2，默认条数为100行。

//mysqliteOpenHelper作为一个访问SQLite的帮助类,提供两方面的功能
//1.getReadableDatabase(),getWritableDatabase()可以获得SQLiteDatatbase对象,
//对这个对象进行相关操作
//2.提供了onCreate()和onUpgrade()两个回调函数，允许我们在创建和升级数据库时进行操作
public class MySQLiteOpenHelper extends SQLiteOpenHelper 

	public static final String DATABASE_NAME = "test.db";

	public static final String TAG = "MySQLiteOpenHelper";

	public MySQLiteOpenHelper(Context context) 
		this(context, DATABASE_NAME, null, 1);
	

	public MySQLiteOpenHelper(Context context, int version) 
		this(context, DATABASE_NAME, null, version);
	

	// 必须要有这一个构造方法
	public MySQLiteOpenHelper(Context context, String name,
			CursorFactory factory, int version) 
		super(context, name, factory, version);
		// TODO Auto-generated constructor stub
	

	// 当数据库第一次创建的时候被调用,
	// 当调用getReadableDatabase ()或getWritableDatabase 的时候
	@Override
	public void onCreate(SQLiteDatabase db) 
		// TODO Auto-generated method stub
		Log.d(TAG, "onCreate");

		String sql = "create table user(id integer primary key autoincrement,"
				+ "name varchar(20)," + "age integer," + "height long,"
				+ "remark varchar(12))";
		db.execSQL(sql);
	

	public void close() 
		SQLiteDatabase db = this.getWritableDatabase();
		db.execSQL("drop table user");
	

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) 
		// TODO Auto-generated method stub
		Log.d(TAG, "onUpgrade");
	

1。使用ContentValues插入。完成时间:4805493666(纳秒)

	/**
	 * ContentValues方式
	 * 
	 * @param sum
	 * @return
	 */
	public long insert1(int sum) 
		long before = System.nanoTime();

		MySQLiteOpenHelper dbHelper = new MySQLiteOpenHelper(MainActivity.this);
		// 得到数据库对象
		SQLiteDatabase db = dbHelper.getWritableDatabase();

		for (int i = 0; i < sum; i++) 
			ContentValues cv = new ContentValues();
			cv.put("name", "zhangsan");
			cv.put("age", "23");
			cv.put("height", 1.78);
			cv.put("remark", "无");
			db.insert("user", null, cv);
		

		db.close();
		long after = System.nanoTime();
		return after - before;

	

2。使用基本slq语句插入。完成时间:3734808485(纳秒)

public long insert2(int sum) 
		long before = System.nanoTime();

		MySQLiteOpenHelper dbHelper = new MySQLiteOpenHelper(MainActivity.this);
		// 得到数据库对象
		SQLiteDatabase db = dbHelper.getWritableDatabase();
		for (int i = 0; i < sum; i++) 
			String sql = "insert into user(name,age,height,remark) values('zhangsan',23,1.78,'无')";
			db.execSQL(sql);
		
		db.close();

		long after = System.nanoTime();
		return after - before;
	

3。使用SQLliteStatement插入。完成时间：4754616203(纳秒)

public long insert3(int sum) 
		long before = System.nanoTime();
		MySQLiteOpenHelper dbHelper = new MySQLiteOpenHelper(MainActivity.this);
		// 得到数据库对象
		SQLiteDatabase db = dbHelper.getWritableDatabase();

		String sql = "insert into user(name,age,height,remark) values(?,?,?,?)";
		SQLiteStatement stmt = db.compileStatement(sql);
		for (int i = 0; i < sum; i++) 
			stmt.clearBindings();
			stmt.bindString(1, "zhangsan");
			stmt.bindLong(2, 23);
			stmt.bindLong(3, 178);
			stmt.bindString(4, "无");
			stmt.execute();
		
		db.close();

		long after = System.nanoTime();
		return after - before;
	

4。使用一次插入多条的方式。完成时间：245414315(纳秒)

public long insert4(int sum) 
		long before = System.nanoTime();

		MySQLiteOpenHelper dbHelper = new MySQLiteOpenHelper(MainActivity.this);
		// 得到数据库对象
		SQLiteDatabase db = dbHelper.getWritableDatabase();
		for (int i = 0; i < sum / 10; i++) 
			String sql = "insert into user(name,age,height,remark) values('zhangsan',23,1.78,'无'),"
					+ "('zhangsan',23,1.78,'无'),"
					+ "('zhangsan',23,1.78,'无'),"
					+ "('zhangsan',23,1.78,'无'),"
					+ "('zhangsan',23,1.78,'无'),"
					+ "('zhangsan',23,1.78,'无'),"
					+ "('zhangsan',23,1.78,'无'),"
					+ "('zhangsan',23,1.78,'无'),"
					+ "('zhangsan',23,1.78,'无'),"
					+ "('zhangsan',23,1.78,'无')";
			db.execSQL(sql);
		
		db.close();

		long after = System.nanoTime();
		return after - before;
	

5.使用事务处理插入方式。完成时间:229787881(纳秒)

public long insert5(int sum) 
		long before = System.nanoTime();

		MySQLiteOpenHelper dbHelper = new MySQLiteOpenHelper(MainActivity.this);
		// 得到数据库对象
		SQLiteDatabase db = dbHelper.getWritableDatabase();
		db.beginTransaction();
		for (int i = 0; i < sum; i++) 
			String sql = "insert into user(name,age,height,remark) values('zhangsan',23,1.78,'无')";
			db.execSQL(sql);
		
		db.setTransactionSuccessful();
		db.endTransaction();
		db.close();

		long after = System.nanoTime();
		return after - before;