package cn.com;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
public class testFile {
public static void main(String[] args) throws IOException {
//WriterFile();
ReadFile();
try {
WriterFile1();
} catch (IOException e) {
e.printStackTrace();
}
ReadFile1();
}
public static void WriterFile(){
FileWriter fw = null;
try {
fw = new FileWriter("E:/dome.txt", true); //获取到输出流
BufferedWriter bw = new BufferedWriter(fw);
bw.write("待我沙场归来,许你西窗话下。");
fw.write("待我君临天下,许你一生荣华。");
fw.write("\r\n");
fw.write("待我浪迹天涯,许你四海为家。");
} catch (Exception e) {
e.printStackTrace();
}finally{
if(fw != null){
try {
fw.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
public static void ReadFile(){
FileReader fr = null;
try {
fr = new FileReader("E:/dome.txt");
String fileName = "dome.txt";
//判断文件名是否为.java 结尾。
if(!fileName.endsWith(".txt")){
System.out.println("目标文件后坠名不是.txt");
return;
}
int a;
char[] cbuf = new char[1024];
//String[] str = new String[12];
//String[] str1 = {"1","2"};
//String[] str2;
BufferedReader bf = new BufferedReader(fr);
String temp;
while((temp = bf.readLine()) != null){
System.out.println("读取完毕：***"+temp);
}
//每次只能读取一个字符,返回int字符码，（char）强制转换成字符
while((a = fr.read())!=-1){
System.out.println("读取完毕："+(char)a);
}
//用数组读取多个字符
while((a = fr.read(cbuf))!= -1){
System.out.println("读取完毕："+new String(cbuf, 0, a));
}
} catch (Exception e) {
e.printStackTrace();
}finally{
if(fr != null){
try {
fr.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
public static void WriterFile1() throws IOException{
OutputStream os = null;
try {
os = new FileOutputStream(new File("E:/dome1.txt"));
String str = "待我一袭袈裟,许你相思放下。";
byte[] bt = str.getBytes();
os.write(bt);
} catch (FileNotFoundException e) {
e.printStackTrace();
}finally{
if(os != null){
os.close();
}
}
}
public static void ReadFile1() throws IOException{
InputStream is = null;
try {
is = new FileInputStream(new File("E:/dome1.txt"));
int a ;
byte[] bt = new byte[1024];
while((a = is.read(bt)) != -1){
System.out.println("读取完毕："+new String(bt, 0 , a));
}
} catch (Exception e) {
e.printStackTrace();
}finally{
if(is != null){
is.close();
}
}
}
public static void bufferedWriter() throws IOException{
FileOutputStream fs = null;
try {
fs = new FileOutputStream(new File("E:/dome2.txt"));
String str = "待我高官厚禄,许你足迹天涯。";
BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(fs));
bw.write(str);
} catch (Exception e) {
e.printStackTrace();
}finally{
fs.close();
}
}
public static void bufferedReader() throws IOException{
FileInputStream fs = null;
try {
fs = new FileInputStream("E:/dome2.txt");
BufferedReader br = new BufferedReader(new InputStreamReader(fs));
String temp;
while((temp = br.readLine()) != null){
System.out.println("读取完毕："+temp);
}
} catch (Exception e) {
e.printStackTrace();
}finally{
fs.close();
}
}
}
