struts1 配置文件扩展

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import java.io.File;
import java.io.FilenameFilter;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletException;

import org.apache.commons.digester.Digester;
import org.apache.struts.Globals;
import org.apache.struts.action.ActionServlet;
import org.apache.struts.config.ModuleConfig;
import org.apache.struts.config.ModuleConfigFactory;

public class xxxActionServlet extends ActionServlet {

    /**
     * 序列化id
     */
    private static final long serialVersionUID = -6431294872323567188L;

    /**
     * 模块Struts配置文件所在目录
     */
    private static final String MODULE_CONFIG_LOCATION = "config";

    /**
     * 模块Struts配置文件默认加载级别
     */
    private static final int MODULE_CONFIG_LOAD_LEVEL = 2;

    @SuppressWarnings("unchecked")
    @Override
    protected ModuleConfig initModuleConfig(String prefix, String paths) throws ServletException {
        if (log.isDebugEnabled()) {
            log.debug("Initializing module path '" + prefix + "' configuration from '" + paths + "'");
        }

        // Parse the configuration for this module
        ModuleConfigFactory factoryObject = ModuleConfigFactory.createFactory();
        ModuleConfig config = factoryObject.createModuleConfig(prefix);

        List<URL> urls = (List<URL>) splitAndResolvePaths(paths);
        // Load module struts config
        if (prefix.equals("")) {
            // WebRoot directory
            String webRoot = getServletContext().getRealPath("/");
            // Load module struts config
            loadModuleStrutsConfig(urls, webRoot, MODULE_CONFIG_LOAD_LEVEL);
        }

        // Configure the Digester instance we will use
        Digester digester = initConfigDigester();
        for (Iterator i = urls.iterator(); i.hasNext();) {
            URL url = (URL) i.next();
            digester.push(config);
            this.parseModuleConfigFile(digester, url);
        }

getServletContext().setAttribute(Globals.MODULE_KEY + config.getPrefix(), config);

return config;
}

    /**
     * get struts config file url arraylist
     *
     * @param path
     * @param parentModule
     * @param level
     * @return
     * @throws ServletException
     */
    private void loadModuleStrutsConfig(List<URL> configList, String moduleParentPath, int level) throws ServletException {
        File moduleParentDir = new File(moduleParentPath);
        String[] modules = moduleParentDir.list();
        for (String module : modules) {
            // WEB-INF is not a module
            if (module.toUpperCase().equals("WEB-INF")) {
                continue;
            }
            // Skip files
            String moduleDirPath = moduleParentPath + File.separator + module;
            if (! new File(moduleDirPath).isDirectory()) {
                continue;
            }
            // Module struts config
            String moduleConfigPath = moduleDirPath + File.separator + MODULE_CONFIG_LOCATION;
            File moduleConfigDir = new File(moduleConfigPath);
            if (moduleConfigDir.exists() && moduleConfigDir.isDirectory()) {
                loadModuleStrutsConfig(configList, moduleConfigDir);
            } else {
                if (level - 1 > 0) {
                    loadModuleStrutsConfig(configList, moduleDirPath, level - 1);
                }
            }
        }
    }

    /**
     * @param moduleConfigDir
     */
    private void loadModuleStrutsConfig(List<URL> configList, File moduleConfigDir) {
        File[] strutsConfigFiles = moduleConfigDir.listFiles(new FilenameFilter() {
            public boolean accept(File dir, String name) {
                return name.toLowerCase().startsWith("struts-config-") && name.toLowerCase().endsWith(".xml");
            }
        });
        if (strutsConfigFiles.length > 0) {
            try {
                File strutsConfigFile = strutsConfigFiles[0];
                if (log.isInfoEnabled()) {
                    log.info("Load module struts config from file [" + strutsConfigFile.getAbsolutePath() + "]");
                }
                configList.add(strutsConfigFile.toURI().toURL());
            } catch (MalformedURLException e) {
                log.error("Load module struts config from file [" + strutsConfigFiles[0].getAbsolutePath() + "] failed");
            }
        }
    }
}

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