严重: Servlet.service() for servlet [default] in context with path [/onstudy] thre
[问题点数：40分]
严重: Servlet.service() for servlet [default] in context with path [/onstudy] thre
[问题点数：40分]
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转载文章请注明出自“CSDN（www.csdn.net）”。如是商业用途请联系原作者。SEVERE: Servlet.service() for servlet [Spring MVC Dispatcher Servlet] in context with path [] threw exception [Reque nested exception is java.lang.IllegalArgumentException] with root cause
java.lang.IllegalArgumentException
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 org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:436)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:669)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:574)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at .work.app.UserFilter.doFilter(UserFilter.java:126)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
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:225)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
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)
如上可知，spring mvc 抛出java.lang.IllegalArgumentException，红色标记的代码chain.doFilter(request, response),可知肯定不是这里的问题，但是其他什么地方可报错呢？google了一番也没找出来所以然啦，只有一个简单的with root cause,后来查了一下其他的日志，报错的时候，tomcat正在启动当中，是否启动的时候，请求会出现异常?
目前还没有答案
已解决问题
未解决问题HttpServletRequest (Java EE 5 SDK)
Java EE 5 SDK
javax.servlet.http
Interface HttpServletRequest
All Superinterfaces:
All Known Implementing Classes:
public interface HttpServletRequestextends
Extends the
to provide request information for HTTP servlets.
The servlet container creates an HttpServletRequest
object and passes it as an argument to the servlet's service
methods (doGet, doPost, etc).
&&&&&&&&&&String identifier for Basic authentication.
&&&&&&&&&&String identifier for Client Certificate authentication.
&&&&&&&&&&String identifier for Digest authentication.
&&&&&&&&&&String identifier for Form authentication.
&&&&&&&&&&Returns the name of the authentication scheme used to protect
the servlet.
&&&&&&&&&&Returns the portion of the request URI that indicates the context
of the request.
&&&&&&&&&&Returns an array containing all of the Cookie
objects the client sent with this request.
&&&&&&&&&&Returns the value of the specified request header
as a long value that represents a
Date object.
&&&&&&&&&&Returns the value of the specified request header
as a String.
&&&&&&&&&&Returns an enumeration of all the header names
this request contains.
&&&&&&&&&&Returns all the values of the specified request header
as an Enumeration of String objects.
&&&&&&&&&&Returns the value of the specified request header
as an int.
&&&&&&&&&&Returns the name of the HTTP method with which this
request was made, for example, GET, POST, or PUT.
&&&&&&&&&&Returns any extra path information associated with
the URL the client sent when it made this request.
&&&&&&&&&&Returns any extra path information after the servlet name
but before the query string, and translates it to a real
&&&&&&&&&&Returns the query string that is contained in the request
URL after the path.
&&&&&&&&&&Returns the login of the user making this request, if the
user has been authenticated, or null if the user
has not been authenticated.
&&&&&&&&&&Returns the session ID specified by the client.
&&&&&&&&&&Returns the part of this request's URL from the protocol
name up to the query string in the first line of the HTTP request.
&&&&&&&&&&Reconstructs the URL the client used to make the request.
&&&&&&&&&&Returns the part of this request's URL that calls
the servlet.
&&&&&&&&&&Returns the current session associated with this request,
or if the request does not have a session, creates one.
(boolean&create)
&&&&&&&&&&Returns the current HttpSession
associated with this request or, if there is no
current session and create is true, returns
a new session.
&&&&&&&&&&Returns a java.security.Principal object containing
the name of the current authenticated user.
&&&&&&&&&&Checks whether the requested session ID came in as a cookie.
&&&&&&&&&&Deprecated.&As of Version 2.1 of the Java Servlet
&&&&&&&&&&Checks whether the requested session ID came in as part of the
request URL.
&&&&&&&&&&Checks whether the requested session ID is still valid.
&&&&&&&&&&Returns a boolean indicating whether the authenticated user is included
in the specified logical "role".
, , , , , , , , , , , , , , , , , , , , , , , , , , , ,
BASIC_AUTH
static final
BASIC_AUTH
String identifier for Basic authentication. Value "BASIC"
static final
String identifier for Form authentication. Value "FORM"
CLIENT_CERT_AUTH
static final
CLIENT_CERT_AUTH
String identifier for Client Certificate authentication. Value "CLIENT_CERT"
DIGEST_AUTH
static final
DIGEST_AUTH
String identifier for Digest authentication. Value "DIGEST"
getAuthType
getAuthType()
Returns the name of the authentication scheme used to protect
the servlet. All servlet containers support basic, form and client
certificate authentication, and may additionally support digest
authentication.
If the servlet is not authenticated null is returned.
Same as the value of the CGI variable AUTH_TYPE.
Returns:one of the static members BASIC_AUTH,
FORM_AUTH, CLIENT_CERT_AUTH, DIGEST_AUTH
(suitable for == comparison) or
the container-specific string indicating
the authentication scheme, or
null if the request was
not authenticated.
getCookies
[] getCookies()
Returns an array containing all of the Cookie
objects the client sent with this request.
This method returns null if no cookies were sent.
Returns:an array of all the Cookies
included with this request, or null
if the request has no cookies
getDateHeader
long getDateHeader(&name)
Returns the value of the specified request header
as a long value that represents a
Date object. Use this method with
headers that contain dates, such as
If-Modified-Since.
The date is returned as
the number of milliseconds since January 1, 1970 GMT.
The header name is case insensitive.
If the request did not have a header of the
specified name, this method returns -1. If the header
can't be converted to a date, the method throws
an IllegalArgumentException.
Parameters:name - a String specifying the
name of the header
Returns:a long value
representing the date specified
in the header expressed as
the number of milliseconds
since January 1, 1970 GMT,
or -1 if the named header
was not included with the
- If the header value
can't be converted
getHeader(&name)
Returns the value of the specified request header
as a String. If the request did not include a header
of the specified name, this method returns null.
If there are multiple headers with the same name, this method
returns the first head in the request.
The header name is case insensitive. You can use
this method with any request header.
Parameters:name - a String specifying the
header name
Returns:a String containing the
value of the requested
header, or null
if the request does not
have a header of that name
getHeaders
getHeaders(&name)
Returns all the values of the specified request header
as an Enumeration of String objects.
Some headers, such as Accept-Language can be sent
by clients as several headers each with a different value rather than
sending the header as a comma separated list.
If the request did not include any headers
of the specified name, this method returns an empty
Enumeration.
The header name is case insensitive. You can use
this method with any request header.
Parameters:name - a String specifying the
header name
Returns:an Enumeration containing
the values of the requested header. If
the request does not have any headers of
that name return an empty
enumeration. If
the container does not allow access to
header information, return null
getHeaderNames
getHeaderNames()
Returns an enumeration of all the header names
this request contains. If the request has no
headers, this method returns an empty enumeration.
Some servlet containers do not allow
servlets to access headers using this method, in
which case this method returns null
Returns:an enumeration of all the
header names sent with this
if the request has
no headers,
if the servlet container does not
allow servlets to use this method,
getIntHeader
int getIntHeader(&name)
Returns the value of the specified request header
as an int. If the request does not have a header
of the specified name, this method returns -1. If the
header cannot be converted to an integer, this method
throws a NumberFormatException.
The header name is case insensitive.
Parameters:name - a String specifying the name
of a request header
Returns:an integer expressing the value
of the request header or -1
if the request doesn't have a
header of this name
- If the header value
can't be converted
getMethod()
Returns the name of the HTTP method with which this
request was made, for example, GET, POST, or PUT.
Same as the value of the CGI variable REQUEST_METHOD.
Returns:a String
specifying the name
of the method with which
this request was made
getPathInfo
getPathInfo()
Returns any extra path information associated with
the URL the client sent when it made this request.
The extra path information follows the servlet path
but precedes the query string and will start with
a "/" character.
This method returns null if there
was no extra path information.
Same as the value of the CGI variable PATH_INFO.
Returns:a String, decoded by the
web container, specifying
extra path information that comes
after the servlet path but before
the query string in the request URL;
or null if the URL does not have
any extra path information
getPathTranslated
getPathTranslated()
Returns any extra path information after the servlet name
but before the query string, and translates it to a real
path. Same as the value of the CGI variable PATH_TRANSLATED.
If the URL does not have any extra path information,
this method returns null or the servlet container
cannot translate the virtual path to a real path for any reason
(such as when the web application is executed from an archive).
The web container does not decode this string.
Returns:a String specifying the
real path, or null if
the URL does not have any extra path
information
getContextPath
getContextPath()
Returns the portion of the request URI that indicates the context
of the request. The context path always comes first in a request
URI. The path starts with a "/" character but does not end with a "/"
character. For servlets in the default (root) context, this method
returns "". The container does not decode this string.
It is possible that a servlet container may match a context by
more than one context path. In such cases this method will return the
actual context path used by the request and it may differ from the
path returned by the
The context path returned by
should be considered as the prime or preferred context path of the
application.
Returns:a String specifying the
portion of the request URI that indicates the context
of the requestSee Also:
getQueryString
getQueryString()
Returns the query string that is contained in the request
URL after the path. This method returns null
if the URL does not have a query string. Same as the value
of the CGI variable QUERY_STRING.
Returns:a String containing the query
string or null if the URL
contains no query string. The value is not
decoded by the container.
getRemoteUser
getRemoteUser()
Returns the login of the user making this request, if the
user has been authenticated, or null if the user
has not been authenticated.
Whether the user name is sent with each subsequent request
depends on the browser and type of authentication. Same as the
value of the CGI variable REMOTE_USER.
Returns:a String specifying the login
of the user making this request, or null
if the user login is not known
isUserInRole
boolean isUserInRole(&role)
Returns a boolean indicating whether the authenticated user is included
in the specified logical "role".
Roles and role membership can be
defined using deployment descriptors.
If the user has not been
authenticated, the method returns false.
Parameters:role - a String specifying the name
of the role
Returns:a boolean indicating whether
the user making this request bel
false if the user has not been
authenticated
getUserPrincipal
getUserPrincipal()
Returns a java.security.Principal object containing
the name of the current authenticated user. If the user has not been
authenticated, the method returns null.
Returns:a java.security.Principal containing
the name of the user
null if the user has not been
authenticated
getRequestedSessionId
getRequestedSessionId()
Returns the session ID specified by the client. This may
not be the same as the ID of the current valid session
for this request.
If the client did not specify a session ID, this method returns
Returns:a String specifying the session
ID, or null if the request did
not specify a session IDSee Also:
getRequestURI
getRequestURI()
Returns the part of this request's URL from the protocol
name up to the query string in the first line of the HTTP request.
The web container does not decode this String.
For example:
First line of HTTP request
Returned Value
POST /some/path.html HTTP/1.1/some/path.html
GET http://foo.bar/a.html HTTP/1.0
HEAD /xyz?a=b HTTP/1.1/xyz
To reconstruct an URL with a scheme and host, use
Returns:a String containing
the part of the URL from the
protocol name up to the query stringSee Also:
getRequestURL
getRequestURL()
Reconstructs the URL the client used to make the request.
The returned URL contains a protocol, server name, port
number, and server path, but it does not include query
string parameters.
If this request has been forwarded using
, the server path in the
reconstructed URL must reflect the path used to obtain the
RequestDispatcher, and not the server path specified by the client.
Because this method returns a StringBuffer,
not a string, you can modify the URL easily, for example,
to append query parameters.
This method is useful for creating redirect messages
and for reporting errors.
Returns:a StringBuffer object containing
the reconstructed URL
getServletPath
getServletPath()
Returns the part of this request's URL that calls
the servlet. This path starts with a "/" character
and includes either the servlet name or a path to
the servlet, but does not include any extra path
information or a query string. Same as the value of
the CGI variable SCRIPT_NAME.
This method will return an empty string ("") if the
servlet used to process this request was matched using
the "/*" pattern.
Returns:a String containing
the name or path of the servlet being
called, as specified in the request URL,
decoded, or an empty string if the servlet
used to process the request is matched
using the "/*" pattern.
getSession
getSession(boolean&create)
Returns the current HttpSession
associated with this request or, if there is no
current session and create is true, returns
a new session.
If create is false
and the request has no valid HttpSession,
this method returns null.
To make sure the session is properly maintained,
you must call this method before
the response is committed. If the container is using cookies
to maintain session integrity and is asked to create a new session
when the response is committed, an IllegalStateException is thrown.
Parameters:create - true to create
a new session for this
false to return null
if there's no current session
Returns:the HttpSession associated
with this request or null if
create is false
and the request has no valid sessionSee Also:
getSession
getSession()
Returns the current session associated with this request,
or if the request does not have a session, creates one.
Returns:the HttpSession associated
with this requestSee Also:
isRequestedSessionIdValid
boolean isRequestedSessionIdValid()
Checks whether the requested session ID is still valid.
If the client did not specify any session ID, this method returns
Returns:true if this
request has an id for a valid session
in the cur
false otherwiseSee Also:,
isRequestedSessionIdFromCookie
boolean isRequestedSessionIdFromCookie()
Checks whether the requested session ID came in as a cookie.
Returns:true if the session ID
came in as a
otherwise, falseSee Also:
isRequestedSessionIdFromURL
boolean isRequestedSessionIdFromURL()
Checks whether the requested session ID came in as part of the
request URL.
Returns:true if the session ID
came in as part of a URL; otherwise,
falseSee Also:
isRequestedSessionIdFromUrl
boolean isRequestedSessionIdFromUrl()
Deprecated.&As of Version 2.1 of the Java Servlet
Java EE 5 SDK
Copyright 2007 Sun Microsystems, Inc. All rights reserved. Use is subject to
Scripting on this page tracks web page traffic,
but does not change the content in any way.> Servlet.service() for servlet [validation] in context with path [/User] threw e解决思路
Servlet.service() for servlet [validation] in context with path [/User] threw e解决思路
hnafeng & &
发布时间： & &
浏览：231 & &
回复：1 & &
悬赏：0.0希赛币
Servlet.service() for servlet [validation] in context with path [/User] threw e麻烦各位高手帮忙看看：& orre.StandardWrapperValve invoke严重: Servlet.service() for servlet [validation] in context with path [/User] threw exceptionjava.lang.NullPointerException错误指向：at user.LoginValidation.doGet(LoginValidation.java:23)代码是：if (u.equals(&cc&)&&p.equals(&123&))& 如果是一下错误的第三条应如何在eclipse中clear一下工程啊？java.lang.ClassNotFoundException: com.tsinghua.Login从上面这句异常看是找不到类路径。原因有这么几个：1、如果你请求的url是一个servlet，检查web.xml中servlet的类路径是否正确，注意大小写；2、如果你请求的url是一下struts action，检查一下struts配置文件中action的类路径是否正确，注意大小写；3、如果上面两个办法还不能解决，则有可能是你的类没有被正确编译。在eclipse中clear一下工程，然后重启tomcat试试。
右键工程项目，选择source -》clear uphnbafeit & &
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