Question

Java如何把字符串转化为输入流

try{
//将System.in转化为面向字符的流
InputStreamReader ir = new InputStreamReader(System.in);

in = new BufferedReader(ir);//为输入流提供缓冲区

while ((s = in.readLine()) != "bye")
System.out.println("Read: " + s);

}
catch(IOException e)
{System.out.println("Error! ");}
}
我现在要把System.in换为一个从TextArea中获取的字符串，如何修改？

Answer 1

基本同 zeus3288 的答案

但是InputStream myIn=new ByteArrayInputStream(txt.getBytes());
txt.getBytes()这里有个问题，就是不带参数的getBytes()基本上是不被允许的。。。

InputStream myIn= new ByteArrayInputStream(txt.getBytes("UTF-8"));
要带上参数！指定字符编码（UFT-8或者GBK等），切记。。。

Answer 2

代码如下：
　　/**
　　* 将一个字符串转化为输入流
　　*/
public static InputStream getStringStream(String sInputString){
　　if (sInputString != null && !sInputString.trim().equals("")){
　　try{
　　ByteArrayInputStream tInputStringStream = new ByteArrayInputStream(sInputString.getBytes());
　　return tInputStringStream;
　　}catch (Exception ex){
　　ex.printStackTrace();
　　}
　　}
　　return null;
}

Answer 3

//txt为TextArea内的字符串

try{
InputStream myIn=new ByteArrayInputStream(txt.getBytes());
//将System.in转化为面向字符的流
InputStreamReader ir = new InputStreamReader(myIn);

in = new BufferedReader(ir);//为输入流提供缓冲区

while ((s = in.readLine()) != "bye")
System.out.println("Read: " + s);

}
catch(IOException e)
{System.out.println("Error! ");}
}

Answer 4

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

class ReadByte {
public static void main(String[] args) {
try {
BufferedReader br = new BufferedReader(new FileReader(
"c:/bsmain_runtime.log"));
String s;
while (br.ready() && (s = br.readLine()) != "bye") {
System.out.println("Read: " + s);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}

以上是直接从文件
===================
一下是从String

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PipedReader;
import java.io.PipedWriter;
import java.io.PrintWriter;

class ReadByte {
public static void main(String[] args) {
try {
String test = "1234\r\nsdfs";
PipedWriter pw = new PipedWriter();
PipedReader pr = new PipedReader(pw);
PrintWriter pw2 = new PrintWriter(new BufferedWriter(pw), true);
BufferedReader br = new BufferedReader(pr);
pw2.println(test);

String s;
while (br.ready() && (s = br.readLine()) != "bye") {
System.out.println("Read: " + s);
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}