java中byte,String,InputStream之间的转换(转载)
import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; /** * * @author Andy.Chen * @mail Chenjunjun.ZJ@gmail.com * */ public class InputStreamUtils { final static int BUFFER_SIZE = 4096; /** * 将InputStream转换成String * @param in InputStream * @return String * @throws Exception * */ public static String InputStreamTOString(InputStream in) throws Exception{ ByteArrayOutputStream outStream = new ByteArrayOutputStream(); byte[] data = new byte[BUFFER_SIZE]; int count = -1; while((count = in.read(data,0,BUFFER_SIZE)) != -1) outStream.write(data, 0, count); data = null; return new String(outStream.toByteArray(),"ISO-8859-1"); } /** * 将InputStream转换成某种字符编码的String * @param in * @param encoding * @return * @throws Exception */ public static String InputStreamTOString(InputStream in,String encoding) throws Exception{ ByteArrayOutputStream outStream = new ByteArrayOutputStream(); byte[] data = new byte[BUFFER_SIZE]; int count = -1; while((count = in.read(data,0,BUFFER_SIZE)) != -1) outStream.write(data, 0, count); data = null; return new String(outStream.toByteArray(),"ISO-8859-1"); } /** * 将String转换成InputStream * @param in * @return * @throws Exception */ public static InputStream StringTOInputStream(String in) throws Exception{ ByteArrayInputStream is = new ByteArrayInputStream(in.getBytes("ISO-8859-1")); return is; } /** * 将InputStream转换成byte数组 * @param in InputStream * @return byte[] * @throws IOException */ public static byte[] InputStreamTOByte(InputStream in) throws IOException{ ByteArrayOutputStream outStream = new ByteArrayOutputStream(); byte[] data = new byte[BUFFER_SIZE]; int count = -1; while((count = in.read(data,0,BUFFER_SIZE)) != -1) outStream.write(data, 0, count); data = null; return outStream.toByteArray(); } /** * 将byte数组转换成InputStream * @param in * @return * @throws Exception */ public static InputStream byteTOInputStream(byte[] in) throws Exception{ ByteArrayInputStream is = new ByteArrayInputStream(in); return is; } /** * 将byte数组转换成String * @param in * @return * @throws Exception */ public static String byteTOString(byte[] in) throws Exception{ InputStream is = byteTOInputStream(in); return InputStreamTOString(is); } }