java-IO读取和写入

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 blocke.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 blocke.printStackTrace();}}}

测试类：

package com.hkd.io;public class ManageMain {/** * @param args */public static void main(String[] args) {FileManager fm = new FileManager();fm.readerFile("e:\\AA\\hello.txt");//fm.writeFile(path);fm.writeFile("hello word","e:\\AA\\tt.txt");}}

以后为了方便使用，我们可以直接将其做成jar包