为什么Tiles REGEXP通配符定义会导致无休止的jsp包含错误 [英] Why Tiles REGEXP wildcard definition cause endless jsp including error
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问题描述
我将Tiles 2.2.2与Struts2 2.2.3一起使用，由于Struts2-Tiles插件相当老，它的实现使用了许多不推荐使用Tiles的API，并且我想尝试使用REGEXP通配符，因此我在下面实现了自己的侦听器:
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tile.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>
当我尝试返回磁贴结果的动作时，它以无限循环结束，出现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)
有人可以给我建议吗?我不得不说，如果我不使用通配符定义，那么相同的定义就可以正常工作.非常感谢.
解决方案
我还没有完全解决这个问题，但希望对您有所帮助.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，并且包括tile定义本身(basicLayout.jsp，header.jsp，footer.jsp)中的所有内容.这就解释了为什么在REGEXP切片定义不断匹配每个文件请求并尝试使用新的模板调用(模板递归！)来满足每个新文件请求时，出现无限循环的原因.
标题通配符支持页面显示了几个示例.这些示例都不使用(.*)-我认为我们已经弄清楚了为什么会这样.
您需要使REGEXP的贪婪程度有所降低；我知道Struts使用稍微不同的方法来调用模板图块，但是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" />
和以下磁贴定义应创建您的模板页面，该页面围绕着/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>
I use tiles 2.2.2 with Struts2 2.2.3, since Struts2-Tiles plugin is quite old, its implementation uses many Tiles deprecated API, and I want to try REGEXP wildcard, so I implement my own listener below:
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();
}
}
Then I define my 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>
When I try a action that returns a tiles result, it ends up with an infinite loop, a jsp include error.
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)
Could any one give me advice? I have to say that if I didn't use wildcard definition, the same definition works fine. Thanks a lot.
解决方案
I haven't quite worked this out to my satisfaction but I hope it helps. The regular expression you are using is probably the greediest expression you could possibly use. It matches everything and this includes everything inside the tiles definition itself (basicLayout.jsp, header.jsp, footer.jsp). This explains why you are getting an infinite loop as your REGEXP tiles definition keeps matching every file request and attempting to satisfy each new file request with a new template invocation (template recursion!).
The Tiles Wildcard support page shows several examples. None of these examples use (.*) - I think we have just worked out why this might be.
You will need to make your REGEXP slightly less greedy; I know Struts uses a slightly different approach to invoke template tiles but imagine you have a JSP page containing:
<%@ taglib uri="http://tiles.apache.org/tags-tiles" prefix="tiles" %>
<tiles:insertDefinition name="somepage.tile" />
and the following tiles definition should create your template page wrapped around the content from /WEB-INF/pages/somepage.jsp:
<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>
这篇关于为什么Tiles REGEXP通配符定义会导致无休止的jsp包含错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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