apache-commons-io有一个实用程序名为FileUtils:

URL url = Resources.getResource("myFile.txt");
File myFile = new File(url.toURI());

String content = FileUtils.readFileToString(myFile, "UTF-8");  // or any other encoding

下面的代码对我有用:

compile group: 'commons-io', name: 'commons-io', version: '2.6'

@Value("classpath:mockResponse.json")
private Resource mockResponse;

String mockContent = FileUtils.readFileToString(mockResponse.getFile(), "UTF-8");

Guava也有Files.readLines()如果你想要一个List<String>一行一行的返回值:

List<String> lines = Files.readLines(new File("/file/path/input.txt"), Charsets.UTF_8);

请参考这里比较3种方法(BufferedReader vs. Guava's Files vs. Guava's Resources)从文本文件中获取字符串。

我创建了这样一个NO-dependency静态方法:

import java.nio.file.Files;
import java.nio.file.Paths;

public class ResourceReader {
    public  static String asString(String resourceFIleName) {
        try  {
            return new String(Files.readAllBytes(Paths.get(new CheatClassLoaderDummyClass().getClass().getClassLoader().getResource(resourceFIleName).toURI())));
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}
class CheatClassLoaderDummyClass{//cheat class loader - for sql file loading
}

你可以使用旧的Stupid Scanner技巧在线程序来做到这一点，而不需要任何额外的依赖，如番石榴:

String text = new Scanner(AppropriateClass.class.getResourceAsStream("foo.txt"), "UTF-8").useDelimiter("\\A").next();

伙计们，除非你真的需要，否则不要用第三方的东西。JDK中已经有很多功能了。

public static byte[] readResoureStream(String resourcePath) throws IOException {
    ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
    InputStream in = CreateBffFile.class.getResourceAsStream(resourcePath);

    //Create buffer
    byte[] buffer = new byte[4096];
    for (;;) {
        int nread = in.read(buffer);
        if (nread <= 0) {
            break;
        }
        byteArray.write(buffer, 0, nread);
    }
    return byteArray.toByteArray();
}

Charset charset = StandardCharsets.UTF_8;
String content = new   String(FileReader.readResoureStream("/resource/...*.txt"), charset);
String lines[] = content.split("\\n");