DataSource和ByteArrayDataSource不兼容？

Question

我有以下幾點：

InputStream imageStream = classLoader.getResourceAsStream("email/logo.png"); 
DataSource fds = new ByteArrayDataSource(IOUtils.toByteArray(imageStream), "image/png"); 

會拋出我的錯誤：我在做什麼錯在這裏

Error:(65, 30) java: incompatible types: javax.mail.util.ByteArrayDataSource cannot be converted to org.apache.poi.poifs.nio.DataSource
Error:(66, 44) java: no suitable constructor found for DataHandler(org.apache.poi.poifs.nio.DataSource) constructor javax.activation.DataHandler.DataHandler(javax.activation.DataSource) is not applicable (argument mismatch; org.apache.poi.poifs.nio.DataSource cannot be converted to javax.activation.DataSource) constructor javax.activation.DataHandler.DataHandler(java.net.URL) is not applicable (argument mismatch; org.apache.poi.poifs.nio.DataSource cannot be converted to java.net.URL)

？

Answer 1

很可能你有錯誤的進口。 您正試圖將javax.mail.util.ByteArrayDataSource轉換成org.apache.poi.poifs.nio.DataSource。檢查你的進口。