Java-IO的读取和写入

IO的基本读写

Read（读）

package io;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;


public class read {
	 public static String txt2String(File file){
	        StringBuilder result = new StringBuilder();
	        try{
	            BufferedReader br = new BufferedReader(new FileReader(file));//构造一个BufferedReader类来读取文件
	            String s = null;
	            while((s = br.readLine())!=null){//使用readLine方法，一次读一行
	                result.append(System.lineSeparator()+s);
	            }
	            br.close();    
	        }catch(Exception e){
	            e.printStackTrace();
	        }
	        return result.toString();
	    }
	    public static void main(String[] args){
	        File file = new File("e:/test.txt");
	        System.out.println(txt2String(file));
	    }

	
}

Write(写)

package io;

import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;

public class write {
    public static void main(String[] args) throws IOException {
        String path = "e:/test.txt";
        String word = "狐疑是个靓仔噢~";
        BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(path,true)));
        out.write(word);
        out.close();
    }
}