Method of converting file to multipartfile

File To MultipartFile

introduce spring-mock rely on

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-mock</artifactId>
            <version>2.0.8</version>
        </dependency>

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Code implementation ：

　　File file = new File("PATH");

　　InputStream fileInputStream = new FileInputStream(file);

　　MultipartFile multipartFile = new MockMultipartFile(fileName, fileName, ContentType.APPLICATION_OCTET_STREAM.toString(), fileInputStream);

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What we should pay attention to here is ContentType.APPLICATION_OCTET_STREAM.toString() , The following tape must be selected contentType Construction method of , I used to use no contentType Of , Because there are no settings contentType Resulting in subsequent generation MultipartFile Can't upload successfully . Bear in mind

public MockMultipartFile(String name, 
            @Nullable String originalFilename,
            @Nullable String contentType, 
            InputStream contentStream) throws IOException 

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