java读取本地文件与非本地文件内容

骑猪看日落 2023-06-06 07:50 40阅读 0赞

private String readFile ( String path ) throws IOException {
        StringBuilder builder = new StringBuilder();
        InputStreamReader reader = null;
        BufferedReader bfReader = null;
        try {
            if (path.contains("http://")) {
                URL url = new URL(path);
                InputStream is = url.openStream();
                reader = new InputStreamReader(is,"utf-8");
                bfReader = new BufferedReader(reader);
            } else {
                reader = new InputStreamReader( new FileInputStream( path ), "UTF-8" );
                bfReader = new BufferedReader( reader );
            }
            String tmpContent = null;
            while ( ( tmpContent = bfReader.readLine() ) != null ) {
                builder.append( tmpContent );
            }
            bfReader.close();
        } catch ( UnsupportedEncodingException e ) {
            // 忽略
        }
        return this.filter( builder.toString() );
    }
    // 过滤输入字符串, 剔除多行注释以及替换掉反斜杠
    private String filter ( String input ) {
        return input.replaceAll( "/\\*[\\s\\S]*?\\*/", "" );
    }