减少用Java代码打开的文件数

RandomAccessFile file = new RandomAccessFile(\"some file\", \"rw\");
FileChannel channel = file.getChannel();

// some code
String line = \"some data\";
ByteBuffer buf = ByteBuffer.wrap(line.getBytes());
channel.write(buf);

channel.close();
file.close();

Failed with exception Too many open files

channel.close();
file.close();

#/etc/sysctl.conf:
kern.maxfiles=204800
kern.maxfilesperproc=200000
kern.ipc.somaxconn=8096

FileOutputStream s = null;
FileChannel c = null;

try {
    s = new FileOutputStream(filePath);
    c = s.getChannel();
    // do writes
    c.write(\"some data\"); 
    c.force(true);
    s.getFD().sync();

} catch (IOException e) {
    // handle exception
} finally {
    if (c != null)
        c.close();
    if (s != null)
        s.close();
}