java - 将文件转换为 MultiPartFile

Question

有什么方法可以将 File 对象转换为 MultiPartFile？这样我就可以将该对象发送到接受 MultiPartFile 接口(interface)对象的方法？

File myFile = new File("/path/to/the/file.txt")

MultiPartFile ....?

def (MultiPartFile file) {
  def is = new BufferedInputStream(file.getInputStream())
  //do something interesting with the stream
}

Answer 1

MockMultipartFile为此目的而存在。如果文件路径已知，则与您的代码段一样，以下代码适用于我。

import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import org.springframework.mock.web.MockMultipartFile;

Path path = Paths.get("/path/to/the/file.txt");
String name = "file.txt";
String originalFileName = "file.txt";
String contentType = "text/plain";
byte[] content = null;
try {
    content = Files.readAllBytes(path);
} catch (final IOException e) {
}
MultipartFile result = new MockMultipartFile(name,
                     originalFileName, contentType, content);