Java读取文件内容

private String readFromInputStream(String s) throws IOException {
        InputStream inputStream = new FileInputStream(new File(s));
        StringBuilder resultStringBuilder = new StringBuilder();
        try (BufferedReader br = new BufferedReader(new InputStreamReader(inputStream))) {
            String line;
            while ((line = br.readLine()) != null) {
                resultStringBuilder.append(line).append("\n");
            }
        }
        return resultStringBuilder.toString();
    }

调用：

String str = readFromInputStream("project\\simpleDemo\\src\\main\\AndroidManifest.xml");