java读写文件代码

<code class="java">import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;

public class ReadFile {

    public static void main(String[] args) {
        try {
            // 读取文件内容
            String content = new String(Files.readAllBytes(Paths.get("test.txt")));

            // 输出文件内容
            System.out.println("文件内容：");
            System.out.println(content);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}</code>

<code class="java">import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;

public class WriteFile {

    public static void main(String[] args) {
        try {
            // 写入文件内容
            String content = "Hello world!";
            Files.write(Paths.get("test.txt"), content.getBytes());

            // 输出写入成功信息
            System.out.println("写入文件成功！");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}</code>