📄 webapp-scrapbook.xtp
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<document> <header> <product>resin</product> <title>Web Applications Scrapbook</title> <description> <p>A repository of notes and comments that will eventually make their way into the documentation. Please treat the information here with caution, it has often not been verified.</p> </description> </header> <body> <summary objsummary="localtoc"/> <s1 title="How can I load configuration files for a class that might be used outside of a web-app?" type="faq"> <description> I have a class needs to load a configuration file. This class is independent of the ServletApplication, it could be deployed in a web application or someplace else. What is the best way to allow my class to access the configuration file? </description> <p>You can use <var>ClassLoader</var> to load your configration file from anywhere in the classpath. </p> <p>A file from the classpath is always available to every class using the ClassLoader.getResourceAsStream method. So you don't need to pass around any servlet context information.</p> <p>The classpath also gives you a good deal of options of how to package your files. You can put them in jars in <var>WEB-INF/lib</var> or in the <var>WEB-INF/classes</var> directory, or even in a jar file in <var>$RESIN_HOME/lib</var>.</p> <p>The basic call would be:</p> <example>ClassLoader loader = Thread.currentThread().getContextClassLoader();InputStream is = loader.getResourceAsStream("config/myconfig.xml"); </example> <p>The classpath is used to find the file, and the first one found is used. An example of the search order for the above example is:</p> <ol> <li>$RESIN_HOME/lib/anyjar.jar!/config/myconfig.xml </li><li>WEB-INF/classes/config/myconfig.xml </li><li>WEB-INF/lib/anyjar.jar!/config/myconfig.xml </li></ol> </s1> </body></document>⌨️ 快捷键说明
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