我有一个长度为2.2亿(固定)的int和float数组。现在，我想将这些阵列存储到内存和磁盘/从内存和磁盘上载。目前，我正在使用Java

NIO的FileChannel和MappedByteBuffer解决此问题。它可以正常工作，但大约需要5秒钟(Wall Clock

Time)(用于将阵列存储到内存或从内存上载到磁盘或从磁盘上载到磁盘)。实际上，我想要一个更快的。有人可以帮我吗，有没有内置的Java库/数据库/任何其他方法可以更快地上传/存储数组？我特别关心从磁盘上传到内存。我想使其更快。因此，如果存储时间会增加，那我没有问题。提前致谢。

我使用的代码如下(如果需要)：

int savenum = 220000000 ;

public void save() {

try {

long l = 0 ;

FileChannel channel = new RandomAccessFile(str1, "rw").getChannel();

MappedByteBuffer mbb = channel.map(FileChannel.MapMode.READ_WRITE, 0, savenum * 8);

mbb.order(ByteOrder.nativeOrder());

for(int i = 0 ; i < savenum ; i++){

l = a[i] ;

mbb.putLong(l);

}

channel.close();

FileChannel channel1 = new RandomAccessFile(str2, "rw").getChannel();

MappedByteBuffer mbb1 = channel1.map(FileChannel.MapMode.READ_WRITE, 0, savenum * 4);

mbb1.order(ByteOrder.nativeOrder());

for(int i = 0 ; i < savenum ; i++){

int ll = b[i] ;

mbb1.putInt(ll);

}

channel1.close();

}

catch (Exception e){

System.out.println("IOException : " + e);

}

}

public void load(){

try{

FileChannel channel2 = new RandomAccessFile(str1, "r").getChannel();

MappedByteBuffer mbb2 = channel2.map(FileChannel.MapMode.READ_ONLY, 0, channel2.size());

mbb2.order(ByteOrder.nativeOrder());

assert mbb2.remaining() == savenum * 8;

for (int i = 0; i < savenum; i++) {

long l = mbb2.getLong();

a[i] = l ;

}

channel2.close();

FileChannel channel3 = new RandomAccessFile(str2, "r").getChannel();

MappedByteBuffer mbb3 = channel3.map(FileChannel.MapMode.READ_ONLY, 0, channel3.size());

mbb3.order(ByteOrder.nativeOrder());

assert mbb3.remaining() == savenum * 4;

for (int i = 0; i < savenum; i++) {

int l1 = mbb3.getInt();

b[i] = l1 ;

}

channel3.close();

}

catch(Exception e){

System.out.println(e) ;

}

}