使用Postman測試上傳圖片接口報錯：the request was rejected because no multipart boundary was found

問題

使用Postman測試上傳接口，如下：

請求，報錯：

org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found
	at org.apache.tomcat.util.http.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:831) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
	at org.apache.tomcat.util.http.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:256) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
	at org.apache.tomcat.util.http.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:280) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
	at org.apache.catalina.connector.Request.parseParts(Request.java:2868) ~[tomcat-embed-core-8.5.29.jar:8.5.29]
	...

解決

出現這個的原因是因爲Postman會自動加上Content-Type:multipart/form-data這對請求頭信息，不需要我們手動添加，將其刪除即可：