java-IO读取和写入_lcn_Lynn的博客

IO读取和写入

package com.hkd.io;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;

public class FileManager {
	
	StringBuffer sb = new StringBuffer();
	public void readerFile(String path){
		
		
		try {
			Reader r = new FileReader(path);
			char[] cs = new char[4096];//创建一个字符缓冲区
			int length = r.read(cs);//第一次读取
			while(length>0){
				sb.append(cs, 0, length);
				length=r.read(cs);//再次读取
			}
			r.close();
			System.out.println(sb);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
	
	public void writeFile(String content,String path){
		
		try {
			Writer w = new FileWriter(path);
			//String content=sb.toString();//获取读到的数据给content，其实就是把拿到读到的数据进行写入到指定路径，就是复制。
			w.write(content);
			w.close();
			System.out.println(content);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}

}package com.hkd.io;

import j