用Java如何下载一个网页里面的图片到本地？

Question

URL url = new URL("图片地址");
            URLConnection uc = url.openConnection();
            InputStream is = uc.getInputStream();
            File file = new File("本地路径");
            FileOutputStream out = new FileOutputStream(file);
            int i=0;
            while ((i=is.read())!=-1) {
                out.write(i);
            }
            is.close();

Answer 1

public String saveToFile(String destUrl, String pathName) {
        FileOutputStream fos = null;
        BufferedInputStream bis = null;
        HttpURLConnection httpUrl = null;
        URL url = null;
        String fullPath = null;
        
        byte[] buf = new byte[BUFFER_SIZE];
        int size = 0;
               
        try {
            url = new URL(destUrl);
            httpUrl = (HttpURLConnection) url.openConnection();
            
            httpUrl.connect();
            
            bis = new BufferedInputStream(httpUrl.getInputStream());
            
            fullPath = getFullPath(pathName,this.fileFormat); 
            fos = new FileOutputStream(fullPath);             while ( (size = bis.read(buf)) != -1) {
                fos.write(buf, 0, size);
            }
            fos.flush();
        }
        catch(IOException e) {
            
        }
        catch(ClassCastException e) {
            
        }
        finally {
            try {
                fos.close();
                bis.close();
                httpUrl.disconnect();
            }
            catch(IOException e) {
                
            }
            catch(NullPointerException e) {
                
            }           
        }                     
        return getImageName(fullPath); 
      }