java 文件读写_FileReader

package test;

import java.io.File;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

public class Test {

public static void main(String arg[]) {

String fileName = "E:\\share\\test.txt";

String writeData = "HelloWorld!\r\nnihao我的内存是3G的 ";

File file = new File(fileName);

if(file.exists()){

file.delete();

}

char[] byteOutData = writeData.toCharArray();

char[] byteInData = new char[50];

int length = 0;

try {

file.createNewFile();

if(file.exists() && file.canWrite()){

FileWriter fileWrite = new FileWriter(file);

fileWrite.write(byteOutData);

fileWrite.close();

}

if (file.exists() && file.canRead()) {

FileReader fileReader = new FileReader(file);

while((length = fileReader.read(byteInData)) !=-1){

System.out.print(new String(byteInData,0,length));

}

fileReader.close();

}

} catch (IOException e) {

System.out.println("IOException occur");

e.getMessage();

}

}

}

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/whb3118/archive/2009/12/29/5099733.aspx