Java 根据网络地址URL获取文件

小鱼儿 2024-04-17 06:14 67阅读 0赞

### 一、功能需求 ###

系统需要根据提供的文件地址URL获取该文件,代码实现如下:

### 二、解决办法 ###

/**
         * 根据URL地址获取文件
         * @param path URL网络地址
         * @return File
         */
        private static File getFileByHttpURL(String path){
        
            String newUrl = path.split("[?]")[0];
            String[] suffix = newUrl.split("/");
            //得到最后一个分隔符后的名字
            String fileName = suffix[suffix.length - 1];
            File file = null;
            InputStream inputStream = null;
            OutputStream outputStream = null;
            try{
        
                file = File.createTempFile("report",fileName);//创建临时文件
                URL urlFile = new URL(newUrl);
                inputStream = urlFile.openStream();
                outputStream = new FileOutputStream(file);
    
                int bytesRead = 0;
                byte[] buffer = new byte[8192];
                while ((bytesRead=inputStream.read(buffer,0,8192))!=-1) {
        
                    outputStream.write(buffer, 0, bytesRead);
                }
            }catch (Exception e) {
        
                e.printStackTrace();
            }finally {
        
                try {
        
                    if (null != outputStream) {
        
                        outputStream.close();
                    }
                    if (null != inputStream) {
        
                        inputStream.close();
                    }
    
                } catch (Exception e) {
        
                    e.printStackTrace();
                }
            }
            return file;
        }