System.getproperty ("Line.separator") precautions

In the implementation of Multipart/form-data image upload, you need to use \ r \ n to separate each line, in Java implementation of Multipart/form-data image upload can use System.getproperty (" Line.separator ") to split each line. But if you're using code for Android, remember that you can't use System.getproperty ("Line.separator") to split each line, because in Android System.getproperty (" Line.separator "), the result is \ n, in Java it is \ r \ n.

It is not recommended that you use System.getproperty ("Line.separator"), there will be some unexpected problems, and these problems are not easy to trace back to System.getproperty ("Line.separator") Use up.

The following is affixed to the use of Java and Android upload code, the code is for NIMG implementation, if you need to use with other environments, change the "Upload parameters" code for the environment.

Uploadimage.java

Package cloud.test;import java.io.bufferedreader;import java.io.bytearrayoutputstream;import  java.io.DataOutputStream;import java.io.File;import java.io.FileInputStream;import  java.io.ioexception;import java.io.inputstreamreader;import java.net.httpurlconnection;import  java.net.url;import java.util.uuid;/** *  image upload  *  @author  cloud * @ version 1.0 */public class uploadimage {   private static  Final string multipart_form_data= "Multipart/form-data";   private static  final string twohyphens =  "--";     private static final  String BOUNDARY =  "---------------------------" +uuid.randomuuid ();     private static final String LINEEND =  "\ r \ n";     Private static final string&nBsp Formname= "UserFile";        private string actionurl;     private int timeout;        private  String filename;    private byte[] data;    private  string imagetype;        /**     *   Initialize image upload Tool      *  @param  actionUrl -  image storage Address       *  @param  timeout -  Picture upload time-out   (milliseconds)      */     public uploadimage (string actionurl,int timeout) {        this.actionUrl=actionUrl;       this.timeout=timeout;     }        /**     *   Set upload content      *  @param  fileName -  picture name      *  @param   data -  picture content      *  @param  imageType -  picture formats       */    public void setdata (string filename,byte[]  Data,imagetype imagetype)  throws Exception{        this.filename=filename;       this.data=data;        this.imagetype=imagetype.getvalue ();               if (imagetype!=null) {          string  extension =imagetype.getvalue (). substring (Imagetype.getvalue (). IndexOf ("/") +1,  Imagetype.getvalue (). Length ());           this.filename= Filename+ "." +extension;       }    }        /**      *  upload      *  @return  -  format <br/>      * {<br/>     * &nbsp;&nbsp;&nbsp;& nbsp; " Code ": 200,<br/>     * &nbsp;&nbsp;&nbsp;&nbsp;" Msg ": " upload success! ",<br/>     * &nbsp;&nbsp;& nbsp;&nbsp; " Data ":  {<br/>     * &nbsp;&nbsp;&nbsp;&nbsp;&nbsp ;&nbsp;&nbsp;&nbsp; " T ": " PNG ",<br/>     * &nbsp;&nbsp;&nbsp;&nbsp;& nbsp;&nbsp;&nbsp;&nbsp; " UserPath ": ",<br/>     * &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; " MD5 ":   " 6F8B47EC3B8EA08335CB6E13CBBE96DC ",<br/>     * &nbsp;&nbsp;& nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; " URL ": " 01/6f8b47ec3b8ea08335cb6e13cbbe96dc.png "<br/>     * &nbsp; &nbsp;&nbsp;&nbsp;} <br/>     * }<br/>     */     public string upload () {       return upload (null,null) ;    }            /**      *  upload      *  @param  actType -  image processing commands      *  @param  param -  Image processing Parameters      *  @return  -  Formats <br/>     * {<br/>      * &nbsp;&nbsp;&nbsp;&nbsp; " Code ": 200,<br/>     * &nbsp;&nbsp;&nbsp;&nbsp;" Msg ": " upload success! ",<br/>     * &nbsp;&nbsp;& nbsp;&nbsp; " Data ":  {<br/>     * &nbsp;&nbsp;&nbsp;&nbsp;&nbsp ;&nbsp;&nbsp;&nbsp; " T ": " PNG ",<br/>     * &nbsp;&nbsp;&nbsp;&nbsp;& nbsp;&nbsp;&nbsp;&nbsp; " UserPath ": ",<br/>     * &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; " MD5 ": " 6F8B47EC3B8EA08335CB6E13CBBE96DC ",<br/>     * &nbsp;& nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; " URL ": " 01/6f8b47ec3b8ea08335cb6e13cbbe96dc.png "<br/>     * &nbsp; &nbsp;&nbsp;&nbsp;} <br/>     * }<br/>     */     public string upload (Acttype acttype,string param) {        HttpURLConnection conn = null;         Dataoutputstream output = null;        bufferedreader  input = null;                try {          url url = new  url (ActionURL);            conn =  (httpurlconnection)  url.openconnection ();             conn.setconnecttimeout (timeout);             conn.setdoinput (true); &nbsP;           conn.setdooutput (True);             conn.setusecaches (False);             conn.setrequestmethod ("POST");             conn.setrequestproperty ("Connection",  "keep-alive");             conn.setrequestproperty ("Content-Type",  multipart_form_data +  ";  boundary="  + boundary);             conn.connect ();             output = new dataoutputstream (Conn.getoutputstream ());                          StringBuilder Sb = new stringbuilder ();             if (acttype!=null&&param!=null) {              /**                *  Upload parameter                */               sb.append (TWOHYPHENS  + boundary + lineend);               sb.append ("content-disposition: form-data; name=\" act\ ""  + lineend);               sb.append (LINEEND);               sb.append (ActType.getValue ()  +  lineend);    &Nbsp;          output.writebytes (Sb.toString ());                              sb = new stringbuilder ();               sb.append (TWOHYPHENS + BOUNDARY  + lineend);               Sb.append ("content-disposition: form-data; name=\" param\ ""  + lineend);               sb.append (LINEEND);               sb.append (param + lineend);               output.writebytes (Sb.toString ());             }                      /**            *  Upload Images            */           sb = new stringbuilder ();           sb.append (Twohyphens + boundary + lineend) ;           sb.append ("content-disposition: form-data;  name=\ " + FORMNAME + " \ ";  filename=\" " + fileName + " \ ""  + lineend);           sb.append ("Content-Type:   " + imagetype + lineend);           sb.append (lineend);             output.writebytes (Sb.tostring ());            output.write (data, 0, data.length);            output.writebytes (lineend);               /**             *  End of upload              */           output.writebytes (TWOHYPHENS +  boundary + twohyphens + lineend);            output.flush ();                       /**            *  return information            */            int code = conn.getresponsecode ();        &NBSP;&NBSP;&NBSP;&NBSP;SYSTEM.OUT.PRINTLN (Code);            if  (code != 200)  {                throw new runtimeexception ("Request"  + actionUrl +  "' Failed!") ");           }            input = new bufferedreader (New inputstreamreader ( Conn.getinputstream ()));           stringbuilder  Response = new stringbuilder ();            string oneline;           while  ((Oneline = input.readline ())  !=  null)  {                Response.append (oneline + lineend);            }           return response.tostring ();        } catch  (ioexception e)  {             throw new runtimeexception (e);         } finally {             try {                 if  (output != null)  {               &nBsp;     output.close ();                 }                 if  (input != null)  {                     input.close ();                 }             } catch  (ioexception e)  {                 throw new  RuntimeException (e);            }             if  (conn != null)  {         &nBsp;       conn.disconnect ();             }        }    }}

Acttype.java

Package cloud.test;/** * Image upload Command * @author cloud * @version 1.0 */public enum Acttype {/** * rotate */ROTATE ("Rotat      E "),/** * crop */CROP (" CROP "),/** * Zoom */RESIZE (" RESIZE ");      private String value;   Private Acttype (String value) {this.value=value;   } public String GetValue () {return value; }}

Imagetype.java

package cloud.test;/** *  picture format  *  @author  Cloud *  @version  1.0  */public enum imagetype {   /**    * jpg format      */   jpg ("image/jpg"),   /**    *  PNG format     */   png ("Image/png"),   /**     * gif format     */   gif ("Image/gif"),   /**     * jpeg format     */   jpeg ("Image/jpeg");       private String value;      private  ImageType (String value)  {      this.value=value;   }    public string getvalue ()  {      return  value;   }}

Source code, jar package, description document Http://pan.baidu.com/s/1ntxMvBb

System.getproperty ("Line.separator") precautions