JavaMail requires an InputStreamSource that creates a fresh stream for every call.

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邮件增加附件时候,报错JavaMail requires an InputStreamSource that creates a fresh stream for every call.

  InputStreamResource inputStreamResource = new InputStreamResource(new URL(url).openStream());
        mimeMessageHelper.addAttachment(
                "wsktn.docx", inputStreamResource
        );

解决方式,使用IOUtils.toByteArray 读取后,ByteArrayResource包装解决此问题


        ByteArrayResource byteArrayResource = new ByteArrayResource(IOUtils.toByteArray(new URL(url).openStream()));
              mimeMessageHelper.addAttachment(
                "wsktn.docx", byteArrayResource 
        );

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