springboot 输出txt下载,

要实现Spring Boot输出txt文件下载，可以使用以下步骤：

1.在pom.xml文件中添加依赖项

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

2.创建一个RESTful API来提供txt文件下载

@RestController
public class DownloadController {
    @GetMapping("/download")
    public ResponseEntity<Resource> downloadFile() {
        String fileName = "example.txt";
        ByteArrayResource resource = new ByteArrayResource("Hello, world!".getBytes());
        return ResponseEntity.ok()
                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=" + fileName)
                .contentType(MediaType.TEXT_PLAIN)
                .contentLength(resource.contentLength())
                .body(resource);
    }
}

3.访问http://localhost:8080/download将下载txt文件。