url路径转MultipartFile

可以使用以下方式将url路径转换为MultipartFile对象:

import org.springframework.web.multipart.MultipartFile;
import org.apache.commons.io.FileUtils;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;

public MultipartFile convertUrlToMultipartFile(String url) {
    RestTemplate restTemplate = new RestTemplate();
    MultiValueMap<String, Object> parts = new LinkedMultiValueMap<>();
    MultipartFile multipartFile = null;

    try {
        byte[] fileBytes = restTemplate.getForObject(url, byte[].class);
        if (fileBytes != null) {
            FileUtils.writeByteArrayToFile(new File("temp.jpg"), fileBytes);
            File tempFile = new File("temp.jpg");
            multipartFile = new MockMultipartFile("file", tempFile.getName(), "image/jpeg", FileUtils.openInputStream(tempFile));
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        //删除临时文件
        FileUtils.deleteQuietly(new File("temp.jpg"));
    }

    return multipartFile;
}

在这个例子中，我们使用了RestTemplate来获取url对应的文件字节数组。然后我们将字节数组写入一个临时文件，然后将临时文件转换为MultipartFile对象。最后我们删除临时文件，返回MultipartFile对象。

请注意，这个例子需要依赖commons-io和commons-fileupload的jar包。你可以在pom.xml文件中添加以下依赖:

<dependency>
    <groupId>commons-fileupload</groupId>
    <artifactId>commons-fileupload</artifactId>
    <version>1.2.2</version>
</dependency>
<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.5</version>
</dependency>

这样就可以将url路径转换为MultipartFile对象了。<span class="em">1</span><span class="em">2</span>
#### 引用[.reference_title]
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