package com.aini;

import java.io.IOException;

import java.io.InputStreamReader;

//流类

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.FileNotFoundException;

import java.io.OutputStreamWriter;

import java.io.FileOutputStream;

import java.io.OutputStreamWriter;

import java.io.FileInputStream;

import java.util.InpuStreamReader;

public class udf {

public static void main(String[] args) throws Exception {

readabc();

eeread();

}

// 常用字符编码读取

private static void readabc() throws IOException {// 字符读取流文件

InputStreamReader isr = new InputStreamReader(new FileInputStream(

"E:\\utf.txt"), "utf-8");

char[] buf = new char[1024];

int len = isr.read(buf);// 有流的地方就有异常

String s = new String(buf, 0, len);

System.out.println(s);

// 写入

}

public static void writeabc() throws Exception {

OutputStreamWriter osw = new OutputStreamWriter(new FileOutputStream(

"E:\\utf.txt"), "utf-8");

osw.write("你好");

osw.close();

}// 字节流//读取方法

public static void eeread() throws Exception {

DataInputStream dis = new DataInputStream(new FileInputStream(

"E:\\utfdata.txt"));

String s = dis.readUTF();// 字符串型时，只有readUTF()方法

System.out.println(s);

dis.close();

// 读取int .boolean.double

}

public static void writeaa() throws Exception {

DataInputStream dis = new DataInputStream(new FileInputStream(

"E:\\te.txt"));

int num = dis.readInt();// 整型

boolean flag = dis.readBoolean();// 布尔型

Double dd = dis.readDouble();// 大写double也是一类型？？？

System.out.println(num + "\\" + flag + "\\" + dd);

}// 写入int ,double.booleanr//数据流，dateInputStream

public static void readaa() throws IOException {

DataOutputStream dos = new DataOutputStream(new FileOutputStream(

"E:\\data.txt"));

dos.writeInt(234);

dos.writeBoolean(false);

dos.writeDouble(2.2);

dos.close();

}

}