如果你有番石榴，那么你可以使用:

String fileContent = Files.asCharSource(new File(filename), Charset.forName("UTF-8")).read();

(其他解决方案提到了番石榴的其他方法，但已弃用)

package test;

import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try {
            String fileContent = getFileFromResources("resourcesFile.txt");
            System.out.println(fileContent);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //USE THIS FUNCTION TO READ CONTENT OF A FILE, IT MUST EXIST IN "RESOURCES" FOLDER
    public static String getFileFromResources(String fileName) throws Exception {
        ClassLoader classLoader = Main.class.getClassLoader();
        InputStream stream = classLoader.getResourceAsStream(fileName);
        String text = null;
        try (Scanner scanner = new Scanner(stream, StandardCharsets.UTF_8.name())) {
            text = scanner.useDelimiter("\\A").next();
        }
        return text;
    }
}

下面是我的方法

public String getFileContent(String fileName) {
    String filePath = "myFolder/" + fileName+ ".json";
    try(InputStream stream = Thread.currentThread().getContextClassLoader().getResourceAsStream(filePath)) {
        return IOUtils.toString(stream, "UTF-8");
    } catch (IOException e) {
        // Please print your Exception
    }
}

如果你有番石榴，那么你可以使用:

String fileContent = Files.asCharSource(new File(filename), Charset.forName("UTF-8")).read();

(其他解决方案提到了番石榴的其他方法，但已弃用)

您可以使用下面的Java代码

new String(Files.readAllBytes(Paths.get(getClass().getResource("example.txt").toURI())));

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
}