Spring Boot如何配置支持大文件分片上传?
时间: 2024-09-21 22:05:11 浏览: 35
在Spring Boot中实现大文件的分片上传功能教程
在Spring Boot中配置大文件分片上传,你需要结合WebFlux框架和MultipartResolver,因为Spring Boot默认的MultipartFile解析器可能无法满足大文件上传的需求。以下是简单的配置步骤:
1. 添加依赖:在`pom.xml`中添加FastJet库作为Multipart的支持,例如:
```xml
<dependency>
<groupId>io.projectreactor.multipart</groupId>
<artifactId>reactor-netty-multipart</artifactId>
<version>0.9.14.RELEASE</version>
</dependency>
```
2. 配置WebFlux:在Spring Boot主类上添加`WebFluxConfigurer`接口的实现类,如`ReactiveMultipartConfig`:
```java
import org.springframework.boot.web.reactive.config.ReactiveWebServerConfiguration;
import org.springframework.boot.web.reactive.config.WebFluxConfigurer;
public class CustomWebFluxConfigurer implements WebFluxConfigurer {
@Override
public void configureHttpMessageFormatters(List<HttpMessageFormatter<?>> formatters) {
// 如果需要自定义格式化器,可以在此处添加
}
@Override
public MultipartHttpMessageReader multipartHttpMessageReader() {
return new ReactiveMultipartHttpMessageReader();
}
}
```
3. 配置文件处理器:创建一个接收文件分片的Controller,比如用`MultiPartResource`:
```java
import io.projectreactor.multipart.MultipartData;
import reactor.core.publisher.Flux;
import reactor.ipc.http.server.HttpServerExchange;
import reactor.util.context.Context;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
@RestController
public class FileUploadController {
private static final int PART_SIZE = 1_000_000; // 设置每个分片的大小
@PostMapping("/upload")
public Flux<Void> handleFileUpload(HttpServerExchange exchange) throws IOException {
MultipartData data = exchange.getAttribute(MultipartData.class);
return data.forEach(part -> {
Path tempFile = Files.createTempFile("upload-", ".part");
try (InputStream inputStream = part.getBody()) {
Files.copy(inputStream, tempFile, StandardCopyOption.REPLACE_EXISTING);
// 然后在这里处理每个分片,保存到数据库或临时目录等
} catch (Exception e) {
throw new RuntimeException(e);
}
return null;
});
}
}
```
以上代码中,`handleFileUpload`方法会在接收到每个分片后将其保存到临时文件中,然后你可以再按需处理这些文件。
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