Spring 3

4.1 Resource

Resource

1. Resource API

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public interface InputStreamSource {  
    InputStream getInputStream() throws IOException;  
}
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public interface Resource extends InputStreamSource {  
       boolean exists();  
       boolean isReadable();  
       boolean isOpen();  
       URL getURL() throws IOException;  
       URI getURI() throws IOException;  
       File getFile() throws IOException;  
       long contentLength() throws IOException;  
       long lastModified() throws IOException;  
       Resource createRelative(String relativePath) throws IOException;  
       String getFilename();  
       String getDescription();  
}

  • InputStreamSource:

    • getInputStream: Return new java.io.InputStream which needs close after used.

  • Resource extends InputStreamSource:

    • exists: Resource exists?

    • isReadable: Resource readable?

    • isOpen: Resource open?

    • getURL: java.util.URL.

    • getURI: java.util.URI.

    URIs identify and URLs locate; however, locators are also identifiers, so every URL is also a URI, but there are URIs which are not URLs.

    • getFile: java.io.File.

    • contentLength: Resource length.

    • lastModified_: Modified date.

    • createRelateive: create file in Resource.

    • getFilename: ONLY return file path.

    • getDescription return full file path.