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

Java代码  收藏代码

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();  

    }  

  

}