(转载)java中outputStream与inputStream的相互转换

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http://www.cnblogs.com/vigarbuaa/archive/2013/01/13/2858859.html

/*做一个功能验证，要用到inputStream与outputStream的转换，本以为很简单的东东搞了蛮久，从"程序员 闫帆"处取得一段代码*/package com.boco.test;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.InputStream;import java.io.OutputStream;public class ConvertUtil {    //inputStream转outputStream    public ByteArrayOutputStream parse(InputStream in) throws Exception    {        ByteArrayOutputStream swapStream = new ByteArrayOutputStream();        int ch;        while ((ch = in.read()) != -1) {               swapStream.write(ch);           }        return swapStream;    }    //outputStream转inputStream    public ByteArrayInputStream parse(OutputStream out) throws Exception    {        ByteArrayOutputStream   baos=new   ByteArrayOutputStream();        baos=(ByteArrayOutputStream) out;        ByteArrayInputStream swapStream = new ByteArrayInputStream(baos.toByteArray());        return swapStream;    }    //inputStream转String    public String parse_String(InputStream in) throws Exception    {        ByteArrayOutputStream swapStream = new ByteArrayOutputStream();        int ch;        while ((ch = in.read()) != -1) {               swapStream.write(ch);           }        return swapStream.toString();    }    //OutputStream 转String    public String parse_String(OutputStream out)throws Exception    {        ByteArrayOutputStream   baos=new   ByteArrayOutputStream();        baos=(ByteArrayOutputStream) out;        ByteArrayInputStream swapStream = new ByteArrayInputStream(baos.toByteArray());        return swapStream.toString();    }    //String转inputStream    public ByteArrayInputStream parse_inputStream(String in)throws Exception    {        ByteArrayInputStream input=new ByteArrayInputStream(in.getBytes());        return input;    }    //String 转outputStream    public ByteArrayOutputStream parse_outputStream(String in)throws Exception    {        return parse(parse_inputStream(in));    }}

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