如何在Java中读取/转换InputStream为String？

import java.io.InputStream;
import java.util.Scanner;

public class InputStreamToString {
    public static void main(String[] args) {
        InputStream inputStream = System.in; // 这里可以替换为您的InputStream实例
        Scanner scanner = new Scanner(inputStream, "UTF-8").useDelimiter("\\A");
        String result = scanner.hasNext() ? scanner.next() : "";
        System.out.println(result);
    }
}

   <groupId>commons-io</groupId>
   <artifactId>commons-io</artifactId>
   <version>2.11.0</version>
</dependency>

import org.apache.commons.io.IOUtils;

import java.io.InputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

public class InputStreamToString {
    public static void main(String[] args) {
        InputStream inputStream = System.in; // 这里可以替换为您的InputStream实例
        try {
            String result = IOUtils.toString(inputStream, StandardCharsets.UTF_8);
            System.out.println(result);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.stream.Collectors;

public class InputStreamToString {
    public static void main(String[] args) {
        InputStream inputStream = System.in; // 这里可以替换为您的InputStream实例
        try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8))) {
            String result = bufferedReader.lines().collect(Collectors.joining("\n"));
            System.out.println(result);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}