小编Pra*_*nav的帖子

今天当我尝试关闭服务器时看到此错误。

这是完整的堆栈跟踪。

06-Jul-2015 05:47:10.407 WARNING [RMI TCP Connection(5)-127.0.0.1] org.apache.catalina.loader.WebappClassLoaderBase.clearReferencesThreads The web application [ROOT] is still processing a request that has yet to finish. This is very likely to create a memory leak. You can control the time allowed for requests to finish by using the unloadDelay attribute of the standard Context implementation. Stack trace of request processing thread:
 sun.misc.Unsafe.park(Native Method)
 java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
 java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
 org.apache.tomcat.dbcp.pool2.impl.LinkedBlockingDeque.takeFirst(LinkedBlockingDeque.java:582)
 org.apache.tomcat.dbcp.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:439)
 org.apache.tomcat.dbcp.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:360)
 org.apache.tomcat.dbcp.dbcp2.PoolingDataSource.getConnection(PoolingDataSource.java:118)
 org.apache.tomcat.dbcp.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1412)
 com.raghavpro.bookhive.models.database.DatabaseConnectivity.getConnection(DatabaseConnectivity.java:26)
 com.raghavpro.bookhive.controllers.book.DetailsServlet.doGet(DetailsServlet.java:35)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
 org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
 org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
 org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142) …

我正在尝试访问 String[][] 数组的长度属性，但得到了一个NumberFormatException.

我的 JSP 代码

    <c:set var="len" value="${Constants.CATEGORIES.length}"/>
    <c:forEach var="i" begin="1" end="${len}" step="1" varStatus ="status">
        <a class="list-group-item" href="">${Constants.CATEGORIES[i][0]}</a>
    </c:forEach>

下面是堆栈跟踪

java.lang.NumberFormatException: For input string: "length"
java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
java.lang.Integer.parseInt(Integer.java:580)
java.lang.Integer.parseInt(Integer.java:615)
javax.el.ArrayELResolver.coerce(ArrayELResolver.java:151)
javax.el.ArrayELResolver.getValue(ArrayELResolver.java:64)
org.apache.jasper.el.JasperELResolver.getValue(JasperELResolver.java:110)
org.apache.el.parser.AstValue.getValue(AstValue.java:169)
org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184)
org.apache.jasper.el.JspValueExpression.getValue(JspValueExpression.java:115)
org.apache.jsp.WEB_002dINF.view.shared.categories_jsp._jspx_meth_c_005fset_005f0(categories_jsp.java:146)
org.apache.jsp.WEB_002dINF.view.shared.categories_jsp._jspService(categories_jsp.java:107)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:934)
org.apache.jsp.WEB_002dINF.view.home.index_jsp._jspService(index_jsp.java:133)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
com.raghavpro.bookhive.controllers.home.IndexServlet.doGet(IndexServlet.java:76)
javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

有什么线索吗？

This is my prolog file.

male(bob).
male(john).

female(betty).
female(dana).

father(bob, john).
father(bob, dana).
mother(betty, john).
mother(betty, dana).

husband(X, Y) :- male(X), mother(Y, Z), father(X, Z).
wife(X, Y) :- female(X), father(Y, Z), mother(X, Z).
son(X, Y) :- male(X), mother(Y, X);female(X), father(Y, X).
daughter(X, Y) :- female(X), mother(Y, X);female(X), father(Y, X).
sister(X, Y) :- female(X), mother(Z, X), mother(Z, Y), X \= Y.
brother(X, Y) :- male(X), mother(Z, X), mother(Z, Y), X \= Y.

I want a name of rule if it returns …

例如,

<ul>
    <li>
        <b>Hey, sexy!</b>
        Hello
    </li>
</ul>

我只想要li标签中的"Hello" .

如果我使用soup.find("ul").li.text它也包括b标签.

我正在努力寻找家庭关系.

例如,我想知道我和父亲的妻子之间的关系是什么？它应该归还母亲.

我和我母亲的女儿之间有什么关系？它应该归还姐姐.

这就是我的图表.有8个关系和2个标签(男性或女性).

如何在不指定任何节点的情况下实现此目的？例如,如果我想知道我和我父亲的女儿之间的关系.

我想做一些类似于MATCH () -[:Father]->()-[:Daughter]->()开始和结束节点之间的关系.

我确定这个查询绝对错误,但我希望你知道我在这里想要实现的目标.