importjava.io.*;publicclassBufferedReaderDemo01{publicstaticvoidmain(String args[]){BufferedReader buf=null;//声明对象buf =newBufferedReader(newInputStreamReader(System.in)) ;//将字节流变为字符流String str =null;//接收输入内容System.out.print("请输入内容:") ;try{ str= buf.readLine() ;//...
FileOutputStream importorg.testng.annotations.Test;importjava.io.*;publicclassFileDemo { @TestpublicvoidfileTest() {//1.创建源File file =newFile("jerry.txt");//2.选择流OutputStream out =null;//3.操作try{ out=newFileOutputStream(file); String msg= "天生丽质难自弃";//因为write方法的参数...
import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; public class Demo { public static void main(String[] args) { File f = new File("word.txt"); FileOutputStream out = null; try { out ...
importjava.io.FileOutputStream;importjava.io.OutputStream;publicclassOutputStreamExample{publicstaticvoidmain(String[]args){try{OutputStreamoutput=newFileOutputStream("output.txt");Stringdata="Hello, World!";output.write(data.getBytes());output.close();}catch(Exceptione){e.printStackTrace();}}} 1...
输出流:java.io.OutputStream 特点: 字节流的抽象基类派生出来的子类名称都是以其父类名作为子类名的后缀。 如:FileInputStream, ByteArrayInputStream等。 说明: 字节流处理的单元是一个字节,用于操作二进制文件(计算机中所有文件都是二进制文件) 1.1. InputStream 案例:读取"c:/a.txt"文件中的所有内容并在控制...
package数据流;importjava.io.IOException;importjava.io.InputStream;importjava.net.MalformedURLException;importjava.net.URL;publicclassTest_InputStream{/** * 获取字节流 * @param url * @return */privateStringgetStream(String url){//获取字节流InputStreamin=null;String result="";try{in=newURL(url...
Sometimes your application will need to read input data from a file or write the output data to a file. Java offers classes in the java.io package to facilitate these input/output (I/O) operations. Data can be of various types, ranging from raw bytes to characters, to primitive data ...
DataOutputStream继承了FilterOutputStream,而FilterOutputStream又继承了OutputStream,该数据输出流拥有常规的写入操作。 数据输出流提供了一些额外的写入方法,用于写入 Java 基础数据类型的数据: 代码示例 该代码使用FileOutputStream做为节点流,往文件中输入数据。
1. UsingInputStream.readAllBytes()(Since Java 9) TheInputStream.readAllBytes()API converts the input stream to bytes. Then we use thenew String()to create a newStringobject. InputStreamin=newFileInputStream(newFile("C:/temp/test.txt"));StringfileContent=newString(in.readAllBytes()); ...
import java.io.IOException; /** * new FileOutputStream("a.txt",true); 第二个参数true,设置为写入的数据拼接在尾部 * \n\r 换行 * write(bys,1,3); 写入字节数组 */ public class out { public static void main(String args[]){ FileOutputStream outputStream = null; ...