我在 Struts2 2.2.3 中使用了 tile 2.2.2，因为 Struts2-Tiles 插件很旧，它的实现使用了许多 Tiles 不推荐使用的 API，我想尝试 REGEXP 通配符，所以我在下面实现了我自己的监听器:
MyTilesContainerFactory
package tiles;
import org.apache.tiles.definition.pattern.DefinitionPatternMatcherFactory;
import org.apache.tiles.definition.pattern.PatternDefinitionResolver;
import org.apache.tiles.definition.pattern.PrefixedPatternDefinitionResolver;
import org.apache.tiles.definition.pattern.regexp.RegexpDefinitionPatternMatcherFactory;
import org.apache.tiles.definition.pattern.wildcard.WildcardDefinitionPatternMatcherFactory;
import org.apache.tiles.factory.BasicTilesContainerFactory;
public class MyTilesContainerFactory extends BasicTilesContainerFactory {
@Override
protected <T> PatternDefinitionResolver<T> createPatternDefinitionResolver(Class<T> customizationKeyClass) {
DefinitionPatternMatcherFactory wildcardFactory = new WildcardDefinitionPatternMatcherFactory();
DefinitionPatternMatcherFactory regexpFactory = new RegexpDefinitionPatternMatcherFactory();
PrefixedPatternDefinitionResolver<T> resolver = new PrefixedPatternDefinitionResolver<T>();
resolver.registerDefinitionPatternMatcherFactory("WILDCARD", wildcardFactory);
resolver.registerDefinitionPatternMatcherFactory("REGEXP", regexpFactory);
return resolver;
}
}
MyTilesInitializer
package tiles;
import org.apache.tiles.TilesApplicationContext;
import org.apache.tiles.factory.AbstractTilesContainerFactory;
import org.apache.tiles.startup.AbstractTilesInitializer;
public class MyTilesInitializer extends AbstractTilesInitializer {
@Override
protected AbstractTilesContainerFactory createContainerFactory(TilesApplicationContext context) {
return new MyTilesContainerFactory();
}
}
MyTilesListener
package tiles;
import org.apache.tiles.startup.TilesInitializer;
import org.apache.tiles.web.startup.AbstractTilesListener;
public class MyTilesListener extends AbstractTilesListener {
@Override
protected TilesInitializer createTilesInitializer() {
return new MyTilesInitializer();
}
}
然后我定义我的tiles.xml
<tiles-definitions>
<definition name="REGEXP:(.*)" template="/WEB-INF/tiles/basicLayout.jsp">
<put-attribute name="header" value="/WEB-INF/tiles/header.jsp" />
<put-attribute name="content" value="/WEB-INF/pages/{1}.jsp" />
<put-attribute name="footer" value="/WEB-INF/tiles/footer.jsp" />
</definition>
</tiles-definitions>
当我尝试返回一个tiles结果的操作时，它以一个无限循环结束，一个jsp包含错误。
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.StackOverflowError
at java.io.UnixFileSystem.getBooleanAttributes0(Native Method)
at java.io.UnixFileSystem.getBooleanAttributes(UnixFileSystem.java:228)
at java.io.File.exists(File.java:733)
at sun.misc.URLClassPath$FileLoader.getResource(URLClassPath.java:999)
at sun.misc.URLClassPath.getResource(URLClassPath.java:169)
at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at org.apache.jasper.compiler.ErrorDispatcher.createJavacError(ErrorDispatcher.java:526)
at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:490)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:416)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:535)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:472)
at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
at org.apache.jasper.runtime.PageContextImpl.doInclude(PageContextImpl.java:638)
at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:632)
at org.apache.tiles.jsp.context.JspTilesRequestContext.include(JspTilesRequestContext.java:103)
at org.apache.tiles.jsp.context.JspTilesRequestContext.dispatch(JspTilesRequestContext.java:96)
at org.apache.tiles.renderer.impl.TemplateAttributeRenderer.write(TemplateAttributeRenderer.java:44)
at org.apache.tiles.renderer.impl.AbstractBaseAttributeRenderer.render(AbstractBaseAttributeRenderer.java:106)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:670)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:690)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:644)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:627)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:321)
at org.apache.tiles.renderer.impl.DefinitionAttributeRenderer.write(DefinitionAttributeRenderer.java:56)
at org.apache.tiles.renderer.impl.AbstractBaseAttributeRenderer.render(AbstractBaseAttributeRenderer.java:106)
at org.apache.tiles.renderer.impl.ChainedDelegateAttributeRenderer.write(ChainedDelegateAttributeRenderer.java:76)
at org.apache.tiles.renderer.impl.AbstractBaseAttributeRenderer.render(AbstractBaseAttributeRenderer.java:106)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:670)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:336)
at org.apache.tiles.template.InsertAttributeModel.renderAttribute(InsertAttributeModel.java:210)
at org.apache.tiles.template.InsertAttributeModel.end(InsertAttributeModel.java:126)
at org.apache.tiles.jsp.taglib.InsertAttributeTag.doTag(InsertAttributeTag.java:311)
at org.apache.jsp.WEB_002dINF.tiles.basicLayout_jsp._jspx_meth_tiles_005finsertAttribute_005f0(basicLayout_jsp.java:128)
at org.apache.jsp.WEB_002dINF.tiles.basicLayout_jsp._jspService(basicLayout_jsp.java:93)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:535)
at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:472)
at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968)
at org.apache.jasper.runtime.PageContextImpl.doInclude(PageContextImpl.java:638)
at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:632)
at org.apache.tiles.jsp.context.JspTilesRequestContext.include(JspTilesRequestContext.java:103)
at org.apache.tiles.jsp.context.JspTilesRequestContext.dispatch(JspTilesRequestContext.java:96)
at org.apache.tiles.renderer.impl.TemplateAttributeRenderer.write(TemplateAttributeRenderer.java:44)
at org.apache.tiles.renderer.impl.AbstractBaseAttributeRenderer.render(AbstractBaseAttributeRenderer.java:106)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:670)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:690)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:644)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:627)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:321)
at org.apache.tiles.renderer.impl.DefinitionAttributeRenderer.write(DefinitionAttributeRenderer.java:56)
at org.apache.tiles.renderer.impl.AbstractBaseAttributeRenderer.render(AbstractBaseAttributeRenderer.java:106)
at org.apache.tiles.renderer.impl.ChainedDelegateAttributeRenderer.write(ChainedDelegateAttributeRenderer.java:76)
at org.apache.tiles.renderer.impl.AbstractBaseAttributeRenderer.render(AbstractBaseAttributeRenderer.java:106)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:670)
at org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:336)
at org.apache.tiles.template.InsertAttributeModel.renderAttribute(InsertAttributeModel.java:210)
at org.apache.tiles.template.InsertAttributeModel.end(InsertAttributeModel.java:126)
at org.apache.tiles.jsp.taglib.InsertAttributeTag.doTag(InsertAttributeTag.java:311)
at org.apache.jsp.WEB_002dINF.tiles.basicLayout_jsp._jspx_meth_tiles_005finsertAttribute_005f0(basicLayout_jsp.java:128)
at org.apache.jsp.WEB_002dINF.tiles.basicLayout_jsp._jspService(basicLayout_jsp.java:93)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
任何人都可以给我建议吗？我不得不说，如果我不使用通配符定义，同样的定义也能正常工作。非常感谢。
最佳答案
我还没有完全满意地解决这个问题，但我希望它有所帮助。您使用的正则表达式可能是您可能使用的最贪婪的表达式。它匹配所有内容，包括tile 定义本身内的所有内容(basicLayout.jsp、header.jsp、footer.jsp)。这解释了为什么您会遇到无限循环，因为您的 REGEXP 切片定义不断匹配每个文件请求并尝试使用新模板调用(模板递归!)满足每个新文件请求。
Tiles Wildcard support page 显示了几个示例。这些示例都没有使用 (.*) - 我想我们刚刚弄清楚了为什么会这样。
你需要让你的 REGEXP 不那么贪婪；我知道 Struts 使用稍微不同的方法来调用模板图块，但假设您有一个包含以下内容的 JSP 页面:
<%@ taglib uri="http://tiles.apache.org/tags-tiles" prefix="tiles" %>
<tiles:insertDefinition name="somepage.tile" />
并且以下磁贴定义应创建您的模板页面，该页面环绕/WEB-INF/pages/somepage.jsp 中的内容:
<definition name="REGEXP:(.*)\.tile" template="/WEB-INF/tiles/basicLayout.jsp">
<put-attribute name="header" value="/WEB-INF/tiles/header.jsp" />
<put-attribute name="content" value="/WEB-INF/pages/{1}.jsp" />
<put-attribute name="footer" value="/WEB-INF/tiles/footer.jsp" />
</definition>
关于struts2 - 为什么 Tiles REGEXP 通配符定义导致无尽的 jsp 包括错误，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/6521609/