写大文件内存溢出的问题
如题,
怎样写出一个100M左右的文件，而不溢出内存？
[解决办法]
用bufferredreader会溢出吗？楼主试试。
[解决办法]
long length=0xffffff;
String file = "G:\\a.dat ";
MappedByteBuffer out = new RandomAccessFile(file, "r ")
.getChannel().map(FileChannel.MapMode.READ_ONLY, 0, length);
for (int i = 0; i < length; i++)
out.put((byte) 'x ');
System.out.println( "Finished writing ");
for (int i = 0; i < 10; i++)
System.out.println((char) out.get(i)); // read file
[解决办法]
MappedByteBuffer out = new RandomAccessFile(file, "r ")
.getChannel().map(FileChannel.MapMode.READ_WRITE, 0, length);
[解决办法]
up
[解决办法]
帮顶~
[解决办法]
public class LargeFile {
public static void main(String[] args) throws Exception ...{
long length = 0x8ffffff;
MappedByteBuffer out = new RandomAccessFile( "G:\a.dat ", "rw ").getChannel()
.map(FileChannel.MapMode.READ_WRITE, 0, length);
for (int i = 0; i < length; i++)
out.put((byte) 'x ');
System.out.println( "Finished writing ");
for (int i = 0; i < 10; i++)
System.out.println((char) out.get(i)); // read file
}
}
[解决办法]
如果文件太大，最好边读边写
[解决办法]
flush 不行吗？
[解决办法]
100M也溢出？
