3, about the mutual conversion between string,file,inputstream

1, introduced the mutual conversion between the String,file,inputstream

1.1 String2inputstream

        /** * String2inputstream (String str) Tool method * *  @param str *            required to convert the string str * @return returned is the result of the string Str converted to InputStream */PU Blic static InputStream String2inputstream (String str) {Bytearrayinputstream stream = new Bytearrayinputstream ( Str.getbytes ()); return stream;}

1.2 inputstream2string (InputStream is); String Inputstream2string (InputStream is, string charset)

        /** * inputstream2string (InputStream is) * * @param is * input stream inputstream is * @return input stream InputStream is Convert to a string */public static string inputstream2string (InputStream is) {StringBuffer buffer = null; BufferedReader in = null;try {in = new BufferedReader (new inputstreamreader); buffer = new StringBuffer (); String line = "", while (line = In.readline ())! = null) {buffer.append (line);}} catch (Exception e) {throw new RuntimeException ("an exception occurred in the call to Utils.inputstream2string (InputStream is)!!!" ");} return buffer.tostring ();}            /** * Inputstream2string (InputStream is, String charset) * * @param is * input stream InputStream is * @param charset * Character Set string charset * @return input stream InputStream is, character set string CharSet converted to a string */public static string inputstream2st Ring (InputStream is, String charset) {Bytearrayoutputstream BAOs = null;try {BAOs = new Bytearrayoutputstream (); byte data[ ] = new Byte[1024];int len = -1;while ((len = is.read (data))! =-1) {baos.write (data, 0, Len);} StRing A = baos.tostring (charset); return baos.tostring (CharSet);} catch (IOException e) {throw new RuntimeException ("an exception occurred in calling Utils.inputstream2string (InputStream is,string charset)!!!" ");} finally {if (null! = BAOs) {try {baos.close ()} catch (IOException e) {throw new RuntimeException ("in the call utils.inputstream2st The ring (InputStream is, String CharSet) has an exception!!! ");} BAOs = null;}}}

1.3 File2inputstream

/** * File2inputstream (file file) *  * * * * * * * * * * @param file *            files * filename * @return file ' inputstream */public static I Nputstream file2inputstream (file file) {InputStream in = null;try {in = new FileInputStream (File), return in;} catch (Filen Otfoundexception e) {throw new RuntimeException ("an exception occurred in calling Utils.file2inputstream (file file)!!!" ");}} /** * File2inputstream (String filenpath) *  * @param filenpath *            File specific path * @return file converted to InputStream */pub Lic static InputStream File2inputstream (String filenpath) {inputstream in = null; File File = null;try {file = new file (Filenpath), in = new FileInputStream (file), return in;} catch (FileNotFoundException E {throw new RuntimeException ("an exception occurred in calling Utils.file2inputstream (String filenpath)!!!" ");}}

1.4 Inputstreamtofile

        /** * Inputstreamtofile (inputstream ins, file file) * * @param ins * input stream inputstream ins * @param File  * Input stream InputStream ins converted file */public static void Inputstreamtofile (InputStream ins, file file) {OutputStream OS = null;try {os = new FileOutputStream (file), int bytesread = 0;byte[] buffer = new Byte[1024];while ((bytesread = Ins.read (b Uffer))! =-1) {os.write (buffer, 0, bytesread);}} catch (Exception e) {throw new RuntimeException ("an exception occurred in calling Utils.inputstreamtofile (InputStream ins, file file)!!! ");} Finally {try {if (OS! = null) Os.close (), if (INS! = null) {Ins.close ();}} catch (IOException e) {throw new runtimeexception ("An exception occurred in calling Utils.inputstreamtofile (InputStream ins, file file)!!!" ");}}} public static void Inputstreamtofile (InputStream ins, String filePath) {outputstream OS = null; File File = null;try {file = new file (filePath); os = new FileOutputStream (file); int bytesread = 0;byte[] buffer = new byte [1024];while ((bytesread = ins.read (buffer))! =-1) {Os.write(buffer, 0, bytesread);}} catch (Exception e) {throw new RuntimeException ("an exception occurred in calling Utils.inputstreamtofile (InputStream ins, file file)!!! ");} Finally {try {if (OS! = null) Os.close (), if (INS! = null) {Ins.close ();}} catch (IOException e) {throw new runtimeexception ("An exception occurred in calling Utils.inputstreamtofile (InputStream ins, file file)!!!" ");}}}

3, about the mutual conversion between string,file,inputstream