struts2配置静态资源代码详解

Struts2框架有两个核心配置文件：struts.xml和Struts2默认属性文件default.properties(在struts2-core-2.3.20.jar中)

default.properties可以通过自己在classpath下写一个struts.properties文件进行定制改写

为什么是struts.properties，这可以看org.apache.struts2.config下的DefaultSettings和PropertiesSettings源码

DefaultSettings.java

public DefaultSettings() {
    ArrayList<Settings> list = new ArrayList<Settings>();
    // stuts.properties, default.properties
    try {
      list.add(new PropertiesSettings("struts"));
    } catch (Exception e) {
      log.warn("DefaultSettings: Could not find or error in struts.properties", e);
    }

PropertiesSettings.java

public PropertiesSettings(String name) {
    URL settingsUrl = ClassLoaderUtil.getResource(name + ".properties", getClass());
    if (settingsUrl == null) {
      if (LOG.isDebugEnabled()) {
      LOG.debug(name + ".properties missing");
      }
      settings = new LocatableProperties();
      return;
    }

也可以把你想写在struts.properties的自定义配置写在struts.xml文件下<constant>节点中，java培训如果同时都在两个文件配置了,一个相同的项目, 先加载 struts.xml,再加载struts.properties也就是说 struts.properties 是可以覆盖 struts.xml里面的配置的

<constant name="struts.devMode" value="false" />
  <constant name="struts.i18n.encoding" value="UTF-8" />
  <constant name="struts.action.extension" value="action," />
  <constant name="struts.objectFactory" value="spring" />
  <constant name="struts.custom.i18n.resources" value="ApplicationResources,errors" />
  <constant name="struts.multipart.maxSize" value="2097152" />
  <constant name="struts.ui.theme" value="css_xhtml" />
  <constant name="struts.codebehind.pathPrefix" value="/WEB-INF/pages/" />
  <constant name="struts.enable.SlashesInActionNames" value="true" />
  <constant name="struts.convention.action.disableScanning"
    value="true" />
  <constant name="struts.mapper.alwaysSelectFullNamespace"
    value="false" />
  <!-- Allow <s:submit> to call method names directly -->
  <constant name="struts.enable.DynamicMethodInvocation" value="true" />
  <constant name="struts.multipart.saveDir" value="/tmp"></constant>

在strut源码StrutsConstants.class包含了所有可配置项

package org.apache.struts2;
import org.apache.struts2.dispatcher.mapper.CompositeActionMapper;
/**
 * This class provides a central location for framework configuration keys
 * used to retrieve and store Struts configuration settings.
 */
public final class StrutsConstants {
  /** Whether Struts is in development mode or not */
  public static final String STRUTS_DEVMODE = "struts.devMode";
  /** Whether the localization messages should automatically be reloaded */
  public static final String STRUTS_I18N_RELOAD = "struts.i18n.reload";
  /** The encoding to use for localization messages */
  public static final String STRUTS_I18N_ENCODING = "struts.i18n.encoding";
  /** Whether to reload the XML configuration or not */
  public static final String STRUTS_CONFIGURATION_XML_RELOAD = "struts.configuration.xml.reload";
  /** The URL extension to use to determine if the request is meant for a Struts action */
  public static final String STRUTS_ACTION_EXTENSION = "struts.action.extension";
  /** Comma separated list of patterns (java.util.regex.Pattern) to be excluded from Struts2-processing */
  public static final String STRUTS_ACTION_EXCLUDE_PATTERN = "struts.action.excludePattern";
  /** Whether to use the alterative syntax for the tags or not */
  public static final String STRUTS_TAG_ALTSYNTAX = "struts.tag.altSyntax";
  /** The HTTP port used by Struts URLs */
  public static final String STRUTS_URL_HTTP_PORT = "struts.url.http.port";
  /** The HTTPS port used by Struts URLs */
  public static final String STRUTS_URL_HTTPS_PORT = "struts.url.https.port";
  /** The default includeParams method to generate Struts URLs */
  public static final String STRUTS_URL_INCLUDEPARAMS = "struts.url.includeParams";
  public static final String STRUTS_URL_RENDERER = "struts.urlRenderer";
  /** The com.opensymphony.xwork2.ObjectFactory implementation class */
  public static final String STRUTS_OBJECTFACTORY = "struts.objectFactory";
  public static final String STRUTS_OBJECTFACTORY_ACTIONFACTORY = "struts.objectFactory.actionFactory";
  public static final String STRUTS_OBJECTFACTORY_RESULTFACTORY = "struts.objectFactory.resultFactory";
  public static final String STRUTS_OBJECTFACTORY_CONVERTERFACTORY = "struts.objectFactory.converterFactory";
  public static final String STRUTS_OBJECTFACTORY_INTERCEPTORFACTORY = "struts.objectFactory.interceptorFactory";
  public static final String STRUTS_OBJECTFACTORY_VALIDATORFACTORY = "struts.objectFactory.validatorFactory";
  public static final String STRUTS_OBJECTFACTORY_UNKNOWNHANDLERFACTORY = "struts.objectFactory.unknownHandlerFactory";
  /** The com.opensymphony.xwork2.util.FileManager implementation class */
  public static final String STRUTS_FILE_MANAGER_FACTORY = "struts.fileManagerFactory";
  /** The com.opensymphony.xwork2.util.fs.FileManager implementation class */
  public static final String STRUTS_FILE_MANAGER = "struts.fileManager";
  /** The com.opensymphony.xwork2.util.ObjectTypeDeterminer implementation class */
  public static final String STRUTS_OBJECTTYPEDETERMINER = "struts.objectTypeDeterminer";
  /** The package containing actions that use Rife continuations */
  public static final String STRUTS_CONTINUATIONS_PACKAGE = "struts.continuations.package";
  /** The org.apache.struts2.config.Configuration implementation class */
  public static final String STRUTS_CONFIGURATION = "struts.configuration";
  /** The default locale for the Struts application */
  public static final String STRUTS_LOCALE = "struts.locale";
  /** Whether to use a Servlet request parameter workaround necessary for some versions of WebLogic */
  public static final String STRUTS_DISPATCHER_PARAMETERSWORKAROUND = "struts.dispatcher.parametersWorkaround";
  /** The org.apache.struts2.views.freemarker.FreemarkerManager implementation class */
  public static final String STRUTS_FREEMARKER_MANAGER_CLASSNAME = "struts.freemarker.manager.classname";
  @Deprecated
  /** Cache Freemarker templates, this cache is managed by struts2,instead of native freemarker cache,set STRUTS_FREEMARKER_MRU_MAX_STRONG_SIZE >0&&STRUTS_FREEMARKER_TEMPLATES_CACHE_UPDATE_DELAY>0*/
  public static final String STRUTS_FREEMARKER_TEMPLATES_CACHE = "struts.freemarker.templatesCache";
  /** Update freemarker templates cache in seconds*/
  public static final String STRUTS_FREEMARKER_TEMPLATES_CACHE_UPDATE_DELAY = "struts.freemarker.templatesCache.updateDelay";
  /** Cache model instances at BeanWrapper level */
  public static final String STRUTS_FREEMARKER_BEANWRAPPER_CACHE = "struts.freemarker.beanwrapperCache";
  /** Maximum strong sizing for MruCacheStorage for freemarker */
  public static final String STRUTS_FREEMARKER_MRU_MAX_STRONG_SIZE = "struts.freemarker.mru.max.strong.size";
  /** org.apache.struts2.views.velocity.VelocityManager implementation class */
  public static final String STRUTS_VELOCITY_MANAGER_CLASSNAME = "struts.velocity.manager.classname";
  /** The Velocity configuration file path */
  public static final String STRUTS_VELOCITY_CONFIGFILE = "struts.velocity.configfile";
  /** The location of the Velocity toolbox */
  public static final String STRUTS_VELOCITY_TOOLBOXLOCATION = "struts.velocity.toolboxlocation";
  /** List of Velocity context names */
  public static final String STRUTS_VELOCITY_CONTEXTS = "struts.velocity.contexts";
  /** The directory containing UI templates. All templates must reside in this directory. */
  public static final String STRUTS_UI_TEMPLATEDIR = "struts.ui.templateDir";
  /** The default UI template theme */
  public static final String STRUTS_UI_THEME = "struts.ui.theme";
  /** Token to use to indicate start of theme to be expanded. */
  public static final String STRUTS_UI_THEME_EXPANSION_TOKEN = "struts.ui.theme.expansion.token";
  /** The maximize size of a multipart request (file upload) */
  public static final String STRUTS_MULTIPART_MAXSIZE = "struts.multipart.maxSize";
  /** The directory to use for storing uploaded files */
  public static final String STRUTS_MULTIPART_SAVEDIR = "struts.multipart.saveDir";
  /** Declares the buffer size to be used during streaming multipart content to disk. Used only with {@link org.apache.struts2.dispatcher.multipart.JakartaStreamMultiPartRequest} */
  public static final String STRUTS_MULTIPART_BUFFERSIZE = "struts.multipart.bufferSize";
  /**
   * The org.apache.struts2.dispatcher.multipart.MultiPartRequest parser implementation
   * for a multipart request (file upload)
   */
  public static final String STRUTS_MULTIPART_PARSER = "struts.multipart.parser";
  /** How Spring should autowire. Valid values are 'name', 'type', 'auto', and 'constructor' */
  public static final String STRUTS_OBJECTFACTORY_SPRING_AUTOWIRE = "struts.objectFactory.spring.autoWire";
  /** Whether the autowire strategy chosen by STRUTS_OBJECTFACTORY_SPRING_AUTOWIRE is always respected. Defaults
   * to false, which is the legacy behavior that tries to determine the best strategy for the situation.
   * @since 2.1.3
   */
  public static final String STRUTS_OBJECTFACTORY_SPRING_AUTOWIRE_ALWAYS_RESPECT = "struts.objectFactory.spring.autoWire.alwaysRespect";
  /** Whether Spring should use its class cache or not */
  public static final String STRUTS_OBJECTFACTORY_SPRING_USE_CLASS_CACHE = "struts.objectFactory.spring.useClassCache";
  /** Uses different logic to construct beans, see https://issues.apache.org/jira/browse/WW-4110 */
  public static final String STRUTS_OBJECTFACTORY_SPRING_ENABLE_AOP_SUPPORT = "struts.objectFactory.spring.enableAopSupport";
  /** Whether or not XSLT templates should not be cached */
  public static final String STRUTS_XSLT_NOCACHE = "struts.xslt.nocache";
  /** Location of additional configuration properties files to load */
  public static final String STRUTS_CUSTOM_PROPERTIES = "struts.custom.properties";
  /** Location of additional localization properties files to load */
  public static final String STRUTS_CUSTOM_I18N_RESOURCES = "struts.custom.i18n.resources";
  /** The org.apache.struts2.dispatcher.mapper.ActionMapper implementation class */
  public static final String STRUTS_MAPPER_CLASS = "struts.mapper.class";
  /**
   * A prefix based action mapper that is capable of delegating to other
   * {@link org.apache.struts2.dispatcher.mapper.ActionMapper}s based on the request's prefix
   * You can specify different prefixes that will be handled by different mappers
   */
  public static final String PREFIX_BASED_MAPPER_CONFIGURATION = "struts.mapper.prefixMapping";
  /** Whether the Struts filter should serve static content or not */
  public static final String STRUTS_SERVE_STATIC_CONTENT = "struts.serve.static";
  /** If static content served by the Struts filter should set browser caching header properties or not */
  public static final String STRUTS_SERVE_STATIC_BROWSER_CACHE = "struts.serve.static.browserCache";
  /** Allows one to disable dynamic method invocation from the URL */
  public static final String STRUTS_ENABLE_DYNAMIC_METHOD_INVOCATION = "struts.enable.DynamicMethodInvocation";
  /** Whether slashes in action names are allowed or not */
  public static final String STRUTS_ENABLE_SLASHES_IN_ACTION_NAMES = "struts.enable.SlashesInActionNames";
  /** Prefix used by {@link CompositeActionMapper} to identify its containing {@link org.apache.struts2.dispatcher.mapper.ActionMapper} class. */
  public static final String STRUTS_MAPPER_COMPOSITE = "struts.mapper.composite";
  public static final String STRUTS_ACTIONPROXYFACTORY = "struts.actionProxyFactory";
  public static final String STRUTS_FREEMARKER_WRAPPER_ALT_MAP = "struts.freemarker.wrapper.altMap";
  /** The name of the xwork converter implementation */
  public static final String STRUTS_XWORKCONVERTER = "struts.xworkConverter";
  public static final String STRUTS_ALWAYS_SELECT_FULL_NAMESPACE = "struts.mapper.alwaysSelectFullNamespace";
  /** XWork default text provider */
  public static final String STRUTS_XWORKTEXTPROVIDER = "struts.xworkTextProvider";
  /** The {@link com.opensymphony.xwork2.LocaleProvider} implementation class */
  public static final String STRUTS_LOCALE_PROVIDER = "struts.localeProvider";
  /** The name of the parameter to create when mapping an id (used by some action mappers) */
  public static final String STRUTS_ID_PARAMETER_NAME = "struts.mapper.idParameterName";
  /** The name of the parameter to determine whether static method access will be allowed in OGNL expressions or not */
  public static final String STRUTS_ALLOW_STATIC_METHOD_ACCESS = "struts.ognl.allowStaticMethodAccess";
  /** The com.opensymphony.xwork2.validator.ActionValidatorManager implementation class */
  public static final String STRUTS_ACTIONVALIDATORMANAGER = "struts.actionValidatorManager";
  /** The {@link com.opensymphony.xwork2.util.ValueStackFactory} implementation class */
  public static final String STRUTS_VALUESTACKFACTORY = "struts.valueStackFactory";
  /** The {@link com.opensymphony.xwork2.util.reflection.ReflectionProvider} implementation class */
  public static final String STRUTS_REFLECTIONPROVIDER = "struts.reflectionProvider";
  /** The {@link com.opensymphony.xwork2.util.reflection.ReflectionContextFactory} implementation class */
  public static final String STRUTS_REFLECTIONCONTEXTFACTORY = "struts.reflectionContextFactory";
  /** The {@link com.opensymphony.xwork2.util.PatternMatcher} implementation class */
  public static final String STRUTS_PATTERNMATCHER = "struts.patternMatcher";
  /** The {@link org.apache.struts2.dispatcher.StaticContentLoader} implementation class */
  public static final String STRUTS_STATIC_CONTENT_LOADER = "struts.staticContentLoader";
  /** The {@link com.opensymphony.xwork2.UnknownHandlerManager} implementation class */
  public static final String STRUTS_UNKNOWN_HANDLER_MANAGER = "struts.unknownHandlerManager";
  /** Throw RuntimeException when a property is not found, or the evaluation of the espression fails*/
  public static final String STRUTS_EL_THROW_EXCEPTION = "struts.el.throwExceptionOnFailure";
  /** Logs properties that are not found (very verbose) **/
  public static final String STRUTS_LOG_MISSING_PROPERTIES = "struts.ognl.logMissingProperties";
  /** Enables caching of parsed OGNL expressions **/
  public static final String STRUTS_ENABLE_OGNL_EXPRESSION_CACHE = "struts.ognl.enableExpressionCache";
  /** Enables evaluation of OGNL expressions **/
  public static final String STRUTS_ENABLE_OGNL_EVAL_EXPRESSION = "struts.ognl.enableOGNLEvalExpression";
  /** Disables {@link org.apache.struts2.dispatcher.StrutsRequestWrapper} request attribute value stack lookup (JSTL accessibility) **/
  public static final String STRUTS_DISABLE_REQUEST_ATTRIBUTE_VALUE_STACK_LOOKUP = "struts.disableRequestAttributeValueStackLookup";
  /** The{@link org.apache.struts2.views.util.UrlHelper} implementation class **/
  public static final String STRUTS_URL_HELPER = "struts.view.urlHelper";
  /** {@link com.opensymphony.xwork2.conversion.impl.XWorkBasicConverter} **/
  public static final String STRUTS_CONVERTER_COLLECTION = "struts.converter.collection";
  public static final String STRUTS_CONVERTER_ARRAY = "struts.converter.array";
  public static final String STRUTS_CONVERTER_DATE = "struts.converter.date";
  public static final String STRUTS_CONVERTER_NUMBER = "struts.converter.number";
  public static final String STRUTS_CONVERTER_STRING = "struts.converter.string";
  /** Enable handling exceptions by Dispatcher - true by default **/
  public static final String STRUTS_HANDLE_EXCEPTION = "struts.handle.exception";
  public static final String STRUTS_CONVERTER_PROPERTIES_PROCESSOR = "struts.converter.properties.processor";
  public static final String STRUTS_CONVERTER_FILE_PROCESSOR = "struts.converter.file.processor";
  public static final String STRUTS_CONVERTER_ANNOTATION_PROCESSOR = "struts.converter.annotation.processor";
  public static final String STRUTS_CONVERTER_CREATOR = "struts.converter.creator";
  public static final String STRUTS_CONVERTER_HOLDER = "struts..converter.holder";
  public static final String STRUTS_EXPRESSION_PARSER = "struts.expression.parser";
  /** actions names' whitelist **/
  public static final String STRUTS_ALLOWED_ACTION_NAMES = "struts.allowed.action.names";
  /** enables action: prefix **/
  public static final String STRUTS_MAPPER_ACTION_PREFIX_ENABLED = "struts.mapper.action.prefix.enabled";
  /** enables access to actions in other namespaces than current with action: prefix **/
  public static final String STRUTS_MAPPER_ACTION_PREFIX_CROSSNAMESPACES = "struts.mapper.action.prefix.crossNamespaces";
  public static final String DEFAULT_TEMPLATE_TYPE_CONFIG_KEY = "struts.ui.templateSuffix";
  /** Allows override default DispatcherErrorHandler **/
  public static final String STRUTS_DISPATCHER_ERROR_HANDLER = "struts.dispatcher.errorHandler";
  /** Comma delimited set of excluded classes and package names which cannot be accessed via expressions **/
  public static final String STRUTS_EXCLUDED_CLASSES = "struts.excludedClasses";
  public static final String STRUTS_EXCLUDED_PACKAGE_NAME_PATTERNS = "struts.excludedPackageNamePatterns";
  /** Dedicated services to check if passed string is excluded/accepted **/
  public static final String STRUTS_EXCLUDED_PATTERNS_CHECKER = "struts.excludedPatterns.checker";
  public static final String STRUTS_ACCEPTED_PATTERNS_CHECKER = "struts.acceptedPatterns.checker";
  /** Constant is used to override framework's default excluded patterns **/
  public static final String STRUTS_OVERRIDE_EXCLUDED_PATTERNS = "struts.override.excludedPatterns";
  public static final String STRUTS_OVERRIDE_ACCEPTED_PATTERNS = "struts.override.acceptedPatterns";
  public static final String STRUTS_ADDITIONAL_EXCLUDED_PATTERNS = "struts.additional.excludedPatterns";
  public static final String STRUTS_ADDITIONAL_ACCEPTED_PATTERNS = "struts.additional.acceptedPatterns";
}

其中

/** Comma separated list of patterns (java.util.regex.Pattern) to be excluded from Struts2-processing */
  public static final String STRUTS_ACTION_EXCLUDE_PATTERN = "struts.action.excludePattern";

保存了不由struts2处理的路径,我们在struts.properties或者struts.xml中配置即可.

struts.action.excludePattern=/dwr/.*,/dwr/test/.*

正则表达式，并非URL匹配地址

总结

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