你要读什么格式的文件? FileReader myFileReader=new FileReader("c:/aaa.txt");
BufferedReader myBufferedReader=new BufferedReader(myFileReader);
String myString=null;
String resultString=new String();
while((myString=myBufferedReader.readLine())!=null)
{
resultString=resultString+myString+"<br>";
}
out.println(resultString);
myFileReader.close();
BufferedReader myBufferedReader=new BufferedReader(myFileReader);
String myString=null;
String resultString=new String();
while((myString=myBufferedReader.readLine())!=null)
{
resultString=resultString+myString+"<br>";
}
out.println(resultString);
myFileReader.close();
解决方案 »
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读取内存映射文本文件
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
import java.nio.charset.*;
public class ReadFileBuff {
public static void main(String args[]) throws IOException {
if (args.length != 0) {
String filename = args[0];
FileInputStream fis = new FileInputStream(filename);
FileChannel channel = fis.getChannel();
int length = (int)channel.size();
MappedByteBuffer byteBuffer =
channel.map(FileChannel.MapMode.READ_ONLY, 0, length);
Charset charset = Charset.forName("ISO-8859-1");
CharsetDecoder decoder = charset.newDecoder();
CharBuffer charBuffer = decoder.decode(byteBuffer);
for (int i=0, n=charBuffer.length(); i<n; i++) {
System.out.print(charBuffer.get());
}
}
}
}
int byteread=0;
file://读/到流中
InputStream inStream=new FileInputStream("c:/aaa.doc");
FileOutputStream fs=new FileOutputStream( "d:/aaa.doc");
byte[] buffer =new byte[1444];
int length;
while ((byteread=inStream.read(buffer))!=-1)
{
out.println("<DT><B>"+byteread+"</B></DT>");
bytesum+=byteread;
System.out.println(bytesum);
fs.write(buffer,0,byteread);
}
inStream.close();
要设置jvm 的 -mx 参数