springboot打jar包後,resouce下檔案無法通路

String file= new File(ResourceUtils.getURL("classpath:json/LalJson").getPath()).getAbsolutePath();
String file= new ClassPathResource("json/LalJson").getFile().getPath();
           

上述方式測試可用，部署jar包不可用

InputStream inputStream = Thread.currentThread().getContextClassLoader().getResourceAsStream("json/LalJson");
String file= readFile(inputStream)
           

上述方法部署jar包可用

其readFile方法如下

/*
 * 讀取檔案内容
 */
 public static String readFile ( InputStream inputStream ) throws IOException {

    StringBuilder builder = new StringBuilder();
    try {
        InputStreamReader reader = new InputStreamReader(inputStream , "UTF-8" );
        BufferedReader bfReader = new BufferedReader( reader );
        String tmpContent = null;
        while ( ( tmpContent = bfReader.readLine() ) != null ) {
            builder.append( tmpContent );
        }
        bfReader.close();
    } catch ( UnsupportedEncodingException e ) {
        // 忽略
    }
    return filter( builder.toString());
}
           

filter方法如下

// 過濾輸入字元串, 剔除多行注釋以及替換掉反斜杠
public static String filter ( String input ) {
    return input.replaceAll( "/\\*[\\s\\S]*?\\*/", "" );
}