[File] Io Common tool class Ioutils (Java read file, write file, zip package)

Blog from: http://blog.csdn.net/amosryan/article/details/6568783

Function directory: Convert input stream to byte stream read the file as a string to specify the encoding format to place the input stream into a list<string> in the GBK format to place the input flow into a list<string> in the form of a row to add the specified newline character to each line ( For example, "\ n", "</br>") converts a string out of a specified file to a zip package of multiple files

Source:[Java] View Plain copy print? package amosryan.utility.file;      import java.io.bufferedreader;   import java.io.bytearrayoutputstream;   import java.io.file;   import  java.io.fileinputstream;   import java.io.fileoutputstream;   import  java.io.filewriter;   import java.io.ioexception;   import java.io.InputStream;    import java.io.inputstreamreader;   import java.io.printwriter;   import java.util.arraylist;   import java.util.list;   import  java.util.zip.zipentry;   import java.util.zip.zipoutputstream;     /**   * io Common kits    *  @author  amosryan   *  @since  2010-06-03   */   public class ioutils {          /**   &NBSP;    *  input flow to byte stream        *  @param  input       *  @return        *  @throws  exception        */       public static byte[]  Tobytes (inputstream input)  throws Exception {            byte[] data = null;            try {                Bytearrayoutputstream byteout = new bytearrayoutputstream ();                byte[] b = new byte[1024];                int read = 0;    &NBSP;&NBSP;&NBsp;         while  ((Read = input.read (b))   > 0)  {                    byteout.write (b, 0, read);                }                data = byteout.tobytearray ();           }  catch  (exception e)  {                e.printstacktrace ();           }  finally {               input.close ( );           }            return data;       }          /**       *  read the file as a string        *         *  @param  input       *  @return         *  @throws  Exception       */        public static string tostring (File file)  throws exception {            return tostring (New fileinputstream (file );       }          /**        *  convert input stream to a string        *         *  @param  input       *  @return         *  @throws  Exception       */       public  static string tostring (inputstream input)  throws Exception {           return tostringwithlinebreak (input, null);        }          /**        *  Place the input stream into a list<string>       *     in the specified encoding format.     *  @param  input       *  @return         *  @throws  Exception       */        public static list<string> tolines (inputstream input, string  encoding)                throws  exception {           inputstreamreader insreader =  new inputstreamreader (input, encoding);            bufferedreader bin = new bufferedreader (insreader);            List<String> lines = new ArrayList<String> ();            String line;            while  ((Line = bin.readline ())  != null)  {                lines.add (line);           }            Bin.close ();           insreader.close ();            return lines;       }           /**       *  placing the input stream into a list<string>  in GBK format       *        *  @param  input        *  @return        *  @throws  Exception        */       public static List<String>  Tolines (inputstream input)  throws Exception {            return tolines (input,  "GBK");       }          /**       *  conversion adds specified line breaks for each line (for example: "/n", "</ Br> ")        *        *  @param   input       *  @param  lineBreak       *  @return        *  @throws  Exception       */        public static string tostringwithlinebreak (InputStream input ,               string linebreak)  throws Exception {           list<string > lines = tolines (input);            Stringbuilder sb = new stringbuilder (20480);            for  (string line : lines)  {                sb.append (line);                if  (linebreak != null)  {                    sb.append (linebreak);                }            }           return sb.tostring ();        }          /**        *  turn the string out to the specified file        *  @param  saveFile        *  @param  content       */        public static void tofile (file savefile, string content)   {           File parent =  Savefile.getparentfile ();           if  (!parent.exists ())  {                parent.mkdirs ();            }           printwriter out =  null;           try {                out = new printwriter (new  FileWriter (savefile));                Out.print (content);                Out.flush ();           } catch  (exception e)  {               e.printstacktrace () ;           } finally {                if  (out != null)  {                    out.close ();                }            }       }          /**        *  Zip packages to a group of files        *         *  @param  srcFiles       *  @param  targetfilename        *  @throws  IOException       */        public static void filestozip (list<file>  srcfiles, string&Nbsp;targetfilename)                throws  IOException {           string fileoutname  = targetFileName +  ". zip";            byte[] buf = new byte[1024];            fileinputstream in = null;            fileoutputstream fos = null;            zipoutputstream out = null;           try  {               fos = new  fileoutputstream (fileoutname);                out = new&nbsp Zipoutputstream (FOS);               for   (file file : srcfiles)  {                    in = new fileinputstream (file);                    Out.putnextentry (New zipentry (file.getname));                    int len;                    while  ((Len = in.read (BUF))  != -1)  {                        out.write (Buf, 0, len);                    }                    if  (in != null)  {                         in.close ();                    }               }            } catch  (exception e)  {               e.printstacktrace ();            } finally {                if  (in != null)  {                     in.close ();                }                if  (fos != null)  {                    out.closeentry ();                    out.close ();                    fos.close ();                }            }       }           public static void main (String[] args)  {            try {               file  doc1 = new file (                         "E://workspace//test//doc//1272531757100_1.doc");                ioutils.tostring (new  FileInputStream (Doc1));           }