SEVERE: Servlet.service() for servlet [CategoryServlet] in context with path [/goods] threw exception报错
不知道怎么解决？
这是我的web.xml
<filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>cn.itcast.filter.EncodingFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>UserServlet</servlet-name>
<servlet-class>cn.itcast.goods.user.web.servlet.UserServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>UserServlet</servlet-name>
<url-pattern>/UserServlet</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>VerifyCodeServlet</servlet-name>
<servlet-class>cn.itcast.vcode.servlet.VerifyCodeServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>CategoryServlet</servlet-name>
<servlet-class>cn.itcast.goods.category.web.servlet.CategoryServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>BookServlet</servlet-name>
<servlet-class>cn.itcast.goods.book.web.servlet.BookServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>CartItemServlet</servlet-name>
<servlet-class>cn.itcast.goods.cart.web.servlet.CartItemServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>OrderServlet</servlet-name>
<servlet-class>cn.itcast.goods.order.web.servlet.OrderServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>AdminServlet</servlet-name>
<servlet-class>cn.itcast.goods.admin.admin.web.servlet.AdminServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>AdminCategoryServlet</servlet-name>
<servlet-class>cn.itcast.goods.admin.category.web.servlet.AdminCategoryServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>AdminBookServlet</servlet-name>
<servlet-class>cn.itcast.goods.admin.book.web.servlet.AdminBookServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>AdminAddBookServlet</servlet-name>
<servlet-class>cn.itcast.goods.admin.book.web.servlet.AdminAddBookServlet</servlet-class>
</servlet>
<servlet>
<servlet-name>AdminOrderServlet</servlet-name>
<servlet-class>cn.itcast.goods.admin.web.servlet.AdminOrderServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>VerifyCodeServlet</servlet-name>
<url-pattern>/VerifyCodeServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>CategoryServlet</servlet-name>
<url-pattern>/CategoryServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>BookServlet</servlet-name>
<url-pattern>/BookServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>CartItemServlet</servlet-name>
<url-pattern>/CartItemServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>OrderServlet</servlet-name>
<url-pattern>/OrderServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>AdminServlet</servlet-name>
<url-pattern>/AdminServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>AdminCategoryServlet</servlet-name>
<url-pattern>/admin/AdminCategoryServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>AdminBookServlet</servlet-name>
<url-pattern>/admin/AdminBookServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>AdminAddBookServlet</servlet-name>
<url-pattern>/admin/AdminAddBookServlet</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>AdminOrderServlet</servlet-name>
<url-pattern>/admin/AdminOrderServlet</url-pattern>
</servlet-mapping>
<filter>
<display-name>LoginFilter</display-name>
<filter-name>LoginFilter</filter-name>
<filter-class>cn.itcast.goods.web.filter.LoginFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>LoginFilter</filter-name>
<url-pattern>/jsps/cart/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>LoginFilter</filter-name>
<servlet-name>CartItemServlet</servlet-name>
</filter-mapping>
<filter-mapping>
<filter-name>LoginFilter</filter-name>
<url-pattern>/jsps/order/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>LoginFilter</filter-name>
<servlet-name>OrderServlet</servlet-name>
</filter-mapping>
<filter>
<display-name>AdminLoginFilter</display-name>
<filter-name>AdminLoginFilter</filter-name>
<filter-class>cn.itcast.goods.admin.web.filter.AdminLoginFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>AdminLoginFilter</filter-name>
<url-pattern>/adminjsps/admin/*</url-pattern>
<url-pattern>/admin/*</url-pattern>
</filter-mapping>
报错信息：
SEVERE: Servlet.service() for servlet [CategoryServlet] in context with path [/goods] threw exception
java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at cn.itcast.servlet.BaseServlet.service(BaseServlet.java:60)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at cn.itcast.filter.EncodingFilter.doFilter(EncodingFilter.java:30)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at cn.itcast.servlet.BaseServlet.service(BaseServlet.java:44)
... 20 more
Caused by: java.lang.RuntimeException: java.sql.SQLException: Connections could not be acquired from the underlying database!
at cn.itcast.goods.category.service.CategoryService.findAll(CategoryService.java:89)
at cn.itcast.goods.category.web.servlet.CategoryServlet.findAll(CategoryServlet.java:31)
... 25 more
Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database!
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:615)
at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)
at cn.itcast.jdbc.JdbcUtils.getConnection(JdbcUtils.java:43)
at cn.itcast.jdbc.TxQueryRunner.query(TxQueryRunner.java:30)
at cn.itcast.goods.category.dao.CategoryDao.findAll(CategoryDao.java:69)
at cn.itcast.goods.category.service.CategoryService.findAll(CategoryService.java:87)
... 26 more
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1406)
at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:594)
at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:514)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:681)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:608)
... 31 more
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