创建一个文本文件,将下面一段文字写入该文件中,读出该文件的数据并打印: 创建一个文本文件,将下面一段文字写入该文件中,读出该文件的数据并打印:FileInputStream 从文件系统中的某个文件中获取输入字节。FileInputStream 用于读取诸如图像数据之类的原始字节流。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 import java.io.BufferedReader;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;public class Test { public static void main(String[] args) { try { PrintWriter pw = new PrintWriter(new FileOutputStream("D:/test.text"),true); pw.print("FileInputStream 从文件系统中的某个文件中获取输入字节。FileInputStream 用于读取诸如图像数据之类的原始字节流。"); pw.close(); BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("D:/test.text"))); System.out.println(br.readLine()); br.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }} File data = new File("D:\\data.txt"); PrintWriter out = new PrintWriter(new OutputStreamWriter(new FileOutputStream(data))); String str = "FileInputStream 从文件系统中的某个文件中获取输入字节"+"\n"+ "FileInputStream 用于读取诸如图像数据之类的原始字节流。 "; out.println(str); out.close(); BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(data))); String s; while((s=in.readLine())!=null) System.out.println(s); 接分import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.IOException;public class FileDemo { public static void main(String[] args) throws IOException{ File file = new File("aaa.txt"); BufferedReader br = new BufferedReader(new FileReader(file)); while(true){ String str = br.readLine(); if(str == null){ return; } System.out.println(str); } }} Sorry,有点小错。已修正,如下import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.IOException;public class FileDemo { public static void main(String[] args) throws IOException{ File file = new File("aaa.txt"); BufferedReader br = new BufferedReader(new FileReader(file)); while(true){ String str = br.readLine(); if(str == null){ br.close(); return; } System.out.println(str); } }} 昨天没有看见楼主还要写文件。。import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;public class FileDemo { public static void main(String[] args) throws IOException{ File file = new File("aaa.txt"); BufferedWriter bw = new BufferedWriter(new FileWriter(file)); String writeStr = new String("FileInputStream 从文件系统中的某个文件中获取输入字节。"); writeStr = writeStr+"\r\n"; writeStr = writeStr + "FileInputStream 用于读取诸如图像数据之类的原始字节流。"; bw.write(writeStr); bw.close(); BufferedReader br = new BufferedReader(new FileReader(file)); while(true){ String str = br.readLine(); if(str == null){ br.close(); return; } System.out.println(str); } } Jprofile内存分析图 Hibernate中可滚动结果集问题求助 在linux,如何像tomcat的startup.sh 一样没有命令行输出。。。。。 谁能解释下\\[\\s*.*\\s*\\]这个正则表达式 万分感激 万分紧急的问题...谢谢关注... !算法问题,呵呵,就贴在这里吧 VB能不能调用java程序?如何调用?请教各位高手!急!!!! 程序编译出错,请朋友们看看 谁能详细的讲以下java.awt.robot类的方法和具体的用法?? 在线等待!关于一个sql的书写,50分,今天下午揭贴! 一个java调试问题 这两个问题请大家指点一下
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;public class Test { public static void main(String[] args) {
try {
PrintWriter pw = new PrintWriter(new FileOutputStream("D:/test.text"),true);
pw.print("FileInputStream 从文件系统中的某个文件中获取输入字节。FileInputStream 用于读取诸如图像数据之类的原始字节流。");
pw.close();
BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream("D:/test.text")));
System.out.println(br.readLine());
br.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} }}
File data = new File("D:\\data.txt");
PrintWriter out =
new PrintWriter(new OutputStreamWriter(new FileOutputStream(data)));
String str = "FileInputStream 从文件系统中的某个文件中获取输入字节"+"\n"+
"FileInputStream 用于读取诸如图像数据之类的原始字节流。 ";
out.println(str);
out.close();
BufferedReader in =
new BufferedReader(new InputStreamReader(new FileInputStream(data)));
String s;
while((s=in.readLine())!=null)
System.out.println(s);
import java.io.File;
import java.io.FileReader;
import java.io.IOException;public class FileDemo {
public static void main(String[] args) throws IOException{
File file = new File("aaa.txt");
BufferedReader br = new BufferedReader(new FileReader(file));
while(true){
String str = br.readLine();
if(str == null){
return;
}
System.out.println(str);
}
}
}
import java.io.File;
import java.io.FileReader;
import java.io.IOException;public class FileDemo {
public static void main(String[] args) throws IOException{
File file = new File("aaa.txt");
BufferedReader br = new BufferedReader(new FileReader(file));
while(true){
String str = br.readLine();
if(str == null){
br.close();
return;
}
System.out.println(str);
}
}
}
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;public class FileDemo {
public static void main(String[] args) throws IOException{
File file = new File("aaa.txt");
BufferedWriter bw = new BufferedWriter(new FileWriter(file));
String writeStr = new String("FileInputStream 从文件系统中的某个文件中获取输入字节。");
writeStr = writeStr+"\r\n";
writeStr = writeStr + "FileInputStream 用于读取诸如图像数据之类的原始字节流。";
bw.write(writeStr);
bw.close();
BufferedReader br = new BufferedReader(new FileReader(file));
while(true){
String str = br.readLine();
if(str == null){
br.close();
return;
}
System.out.println(str);
}
}