public interface InputStreamSource {/*** Return an {@link InputStream}.* <p>It is expected that each call creates a <i>fresh</i> stream.* <p>This requirement is particularly important when you consider an API such* as JavaMail, which needs to be able to read the stream multiple times when* creating mail attachments. For such a use case, it is <i>required</i>* that each <code>getInputStream()</code> call returns a fresh stream.* @throws IOException if the stream could not be opened* @see org.springframework.mail.javamail.MimeMessageHelper#addAttachment(String, InputStreamSource)*/InputStream getInputStream() throws IOException;}

 1     /** Pseudo URL prefix for loading from the class path: "classpath:" */
 2     public static final String CLASSPATH_URL_PREFIX = "classpath:";
 3
 4     /** URL prefix for loading from the file system: "file:" */
 5     public static final String FILE_URL_PREFIX = "file:";
 6
 7     /** URL protocol for a file in the file system: "file" */
 8     public static final String URL_PROTOCOL_FILE = "file";
 9
10     /** URL protocol for an entry from a jar file: "jar" */
11     public static final String URL_PROTOCOL_JAR = "jar";
12
13     /** URL protocol for an entry from a zip file: "zip" */
14     public static final String URL_PROTOCOL_ZIP = "zip";
15
16     /** URL protocol for an entry from a JBoss jar file: "vfszip" */
17     public static final String URL_PROTOCOL_VFSZIP = "vfszip";
18
19     /** URL protocol for an entry from a WebSphere jar file: "wsjar" */
20     public static final String URL_PROTOCOL_WSJAR = "wsjar";
21
22     /** URL protocol for an entry from an OC4J jar file: "code-source" */
23     public static final String URL_PROTOCOL_CODE_SOURCE = "code-source";
24
25     /** Separator between JAR URL and file path within the JAR */
26     public static final String JAR_URL_SEPARATOR = "!/";