Java 字符流实现文件读写操作（FileReader-FileWriter）

Java 字符流实现文件读写操作（FileReader-FileWriter）

备注：字符流效率高，但是没有字节流底层

字节流地址：http://pengyan5945.iteye.com/blog/1092120

package com.frank.io;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;

/**
 * author:pengyan
 * date:Jun 15, 2011
 * file:WriterReaderTest.java
 */
public class WriterReaderTest {

	File f=new File("E:\\abc.txt");

	public static void main(String[] args) throws IOException{
		WriterReaderTest test=new WriterReaderTest();
		test.writeFile("Java字符流读写文件测试!");
		test.readFile();
	}
	private void readFile()  throws IOException{
		//reate BufferedReader with file
		Reader r=new BufferedReader(new FileReader(f));
		//in order to receive the value of this stream read every time
		int temp=0;
		//the all content of this stream read
		String str="";
		while ((temp=r.read())!=-1) {
           //if not end,the total content add the value of the stream read this time
			str+=(char)temp;
		}
		//show the content of the file
		System.out.println("文件内容:"+str);
	}
	private void writeFile(String content) throws IOException {
		if (f.exists()==false) {
			f.createNewFile();//create file if not exist
		}
		//create FileWriter with file
		Writer w=new FileWriter(f);
		//write file
		w.write(content);
		//flush this stream
		w.flush();
		//close this stream
		w.close();
	}

}