FileNotFoundException: http:\localhos46087125.jpg (文件名、目录名或卷标语法不正确

java.io.FileNotFoundException: http:\localhost:8080\ipms\upload\1332146087125.jpg (文件名、目录名或卷标语法不正确。)

http://localhost:8080/ipms/upload/1332146087125.jpg这个是源路径，能打开；导出只能通过这个来获取图片；但是一导出，就报上面的那个错误，求解决方法；

 

用户提供的答案1:

....io怎么通过http来访问...要本地物理路径 如  D:/tomcat/webapps/IPMS/UPLOAD/xxx.jpg

 

用户提供的答案2:

new ImageIcon(new URL("....")).getImage();

 

用户提供的答案3:

用request的contextPath拼上你后边的路径  /upload/1332146087125.jpg就可以拿到了

 

用户提供的答案4:

BufferedImage bufferImg = ImageIO.read(new URL(imageurl));

我这样用的，可以用URL获取到图片

 

可用方法：

 Java模块 -- 从网络中读取图片 转换成Base64字符串

 * 将图片转换为BASE64为字符串 
     * @param filename 
     * @return 
     * @throws IOException 
     */  
    public static String getImageString(String filename) throws IOException {    
        InputStream in = null;    
        byte[] data = null;    
        try {    
            //in = new FileInputStream(filename);   
            in = getInputStreamFromURL(filename);    
            data = new byte[in.available()];    
            in.read(data);    
            in.close();    
        } catch (IOException e) {    
            throw e;    
        } finally {    
            if(in != null) in.close();    
        }    
        BASE64Encoder encoder = new BASE64Encoder();    
        return data != null ? encoder.encode(data) : "";    
   }   
  
     /**  
     * 从URL中读取图片,转换成流形式.  
     * @param destUrl  
     * @return  
     */    
    public static InputStream getInputStreamFromURL(String destUrl){    
            
        HttpURLConnection httpUrl = null;    
        URL url = null;    
        InputStream in = null;     
        try{    
            url = new URL(destUrl);    
            httpUrl = (HttpURLConnection) url.openConnection();    
            httpUrl.connect();               
            in = httpUrl.getInputStream();              
            return in;    
        }catch (Exception e) {    
            e.printStackTrace();    
        }    
        return null;    
    }    
      
    public static void main(String[] args) {  
        String s = null;  
        try {  
            s = getImageString("http://localhost:8080/all/2017/02/09/14/0777a8af971040729998e6f3bd3b3dca.png");  
        } catch (IOException e) {  
            // TODO Auto-generated catch block  
            e.printStackTrace();  
        }  
        System.out.println(s);  
    }

 

 本地图片获取InputStream用new FileInputStream(filename)，

网络图片需要用new URL(destUrl)处理，然后openConnection()，然后使用getInputStream()获取。