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2013-09-18T05:54:27.867
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2015-01-12T14:52:57.770
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<p>I think it is possible to use multiple file upload using the standard JSF 2.2 using the passthrough tag.</p> <h3>Step 1:</h3> <pre><code><html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://xmlns.jcp.org/jsf/html" xmlns:pt="http://xmlns.jcp.org/jsf/passthrough"> ... <h:form id="form" enctype="multipart/form-data"> <h:inputFile id="file" value="#{fileUploadBean.uploadedFile}" pt:multiple="multiple" /> ... </code></pre> <h3>Step 2:</h3> <p>The JSF renderer class <a href="https://java.net/projects/mojarra/sources/svn/content/tags/2.2.9/jsf-ri/src/main/java/com/sun/faces/renderkit/html_basic/FileRenderer.java?rev=14185" rel="nofollow">FileRenderer</a> for the <code>javax.faces.File</code> type of the <code>javax.faces.Input</code> family of components doesn't handle this case correctly.</p> <p>Instead, as it iterates through the parts of the form, it just overwrites the preceding part with each file in the uploaded collection.</p> <p>I think a better strategy is to always have the value of the component be a <code>List<Part></code> instead of just <code>Part</code> as suggested <a href="https://java.net/jira/browse/JAVASERVERFACES_SPEC_PUBLIC-1197" rel="nofollow">here</a> and implemented <a href="https://www.packtpub.com/books/content/uploading-multiple-files" rel="nofollow">here</a>.</p> <h3>Step 3:</h3> <p>The last thing to make it work is to configure such modified multiple file renderer class in <code>faces-config.xml</code> adding the following to the <code><faces-config></code> root element: </p> <pre><code><render-kit> <renderer> <description>Multiple File Renderer</description> <component-family>javax.faces.Input</component-family> <renderer-type>javax.faces.File</renderer-type> <renderer-class>com.example.MultipleFileRenderer</renderer-class> </renderer> </render-kit> </code></pre>
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