项目中生成MultipartFile并调用其它服务

微服务项目中服务调用需要生成multipartFile问题的几种解决方案
1、引入test包，使用test包中的MockMultipartFile
2、自定义实现一个MockMultipartFile（推荐）

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.FileCopyUtils;
import org.springframework.web.multipart.MultipartFile;

/** * @Description TODO * @Author 姚仲杰 * @Date 2022/7/15 11:12 */
public class MockMultipartFile implements MultipartFile {
    
    private final String name;
    private String originalFilename;
    @Nullable
    private String contentType;
    private final byte[] content;
    
    public MockMultipartFile(String name, @Nullable byte[] content) {
    
        this(name, "", (String)null, (byte[])content);
    }
    
    public MockMultipartFile(String name, InputStream contentStream) throws IOException {
    
        this(name, "", (String)null, (byte[])FileCopyUtils.copyToByteArray(contentStream));
    }
    
    public MockMultipartFile(String name, @Nullable String originalFilename, @Nullable String contentType, @Nullable byte[] content) {
    
        Assert.hasLength(name, "Name must not be null");
        this.name = name;
        this.originalFilename = originalFilename != null ? originalFilename : "";
        this.contentType = contentType;
        this.content = content != null ? content : new byte[0];
    }
    
    public MockMultipartFile(String name, @Nullable String originalFilename, @Nullable String contentType, InputStream contentStream) throws IOException {
    
        this(name, originalFilename, contentType, FileCopyUtils.copyToByteArray(contentStream));
    }
    
    @Override
    public String getName() {
    
        return this.name;
    }
    
    @Override
    public String getOriginalFilename() {
    
        return this.originalFilename;
    }
    
    @Override
    @Nullable
    public String getContentType() {
    
        return this.contentType;
    }
    
    @Override
    public boolean isEmpty() {
    
        return this.content.length == 0;
    }
    
    @Override
    public long getSize() {
    
        return (long)this.content.length;
    }
    
    @Override
    public byte[] getBytes() throws IOException {
    
        return this.content;
    }
    
    @Override
    public InputStream getInputStream() throws IOException {
    
        return new ByteArrayInputStream(this.content);
    }
    
    @Override
    public void transferTo(File dest) throws IOException, IllegalStateException {
    
        FileCopyUtils.copy(this.content, dest);
    }
}