读取jar包中指定资源文件的内容

背景描述：SpringBoot项目构建打包生成的jar包，在资源文件夹下有个普通txt文件，路径：/templates/content.txt

方式一：

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File file = new File(ResourceUtils.getURL("classpath:").getPath());
File templateFile = new File(file, "/templates/content.txt");
BufferedReader reader = null;
StringBuffer sbf = new StringBuffer();
try {
    reader = new BufferedReader(new FileReader(file));
    String tempStr;
    while ((tempStr = reader.readLine()) != null) {
        sbf.append(tempStr);
    }
    reader.close();
} catch (IOException e) {
    e.printStackTrace();
} finally {
    if (reader != null) {
        try {
            reader.close();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
    }
}
return sbf.toString();

方式二：

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InputStream in = this.getClass().getClassLoader().getResourceAsStream("templates/content.txt");
BufferedReader reader = null;
StringBuffer sbf = new StringBuffer();
try {
	reader = new BufferedReader(new InputStreamReader(inputStream));
	String tempStr;
	while ((tempStr = reader.readLine()) != null) {
	    sbf.append(tempStr);
	}
	reader.close();
} catch (IOException e) {
	e.printStackTrace();
} finally {
    if (reader != null) {
        try {
            reader.close();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
    }
}
return sbf.toString();

文件位置示例：

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