无法在 portlet 中获取 liferay 登录用户详细信息
Can't get the liferay login user details in portlet
我有一个代理 portlet 和一个通用 portlet。在这里，我将 Post 数据从代理 portlet 发送到通用 portlet。在发送数据时，我使用 post 方法并发送到 view.jsp 页面。在 view.jsp 中，我能够通过输入流获取表单数据。现在的问题是我需要在通用 portlet 中获取登录用户详细信息，如果我单独 运行 我的通用 portlet 我能够获取用户详细信息。但是我从代理 portlet 调用 view.jsp 我无法获取用户详细信息。可能是通用 portlet 未初始化如果我从代理 porlet 调用 view.jsp 所以它会抛出以下错误，
9 Mar, 2015 8:35:22 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [jsp] in context with path [/Producer-portlet] threw exception
[An exception occurred processing JSP page /html/jsp/view.jsp at line 71
68: %>
69:
70: <%
71: String fullname= user.getFullName();
72: System.out.println("Full name is: "+fullname);
73: %>
74:
Stacktrace:] with root cause
java.lang.NullPointerException
at org.apache.jsp.html.jsp.view_jsp._jspService(view_jsp.java:254)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j
ava:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:116)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.liferay.portal.kernel.bean.ClassLoaderBeanHandler.invoke(ClassLoaderBeanHandler.java:
67)
at $Proxy646.doFilter(Unknown Source)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:116)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:123)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(Invo
kerFilterChain.java:204)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:109)
at com.liferay.portal.kernel.servlet.PortalClassLoaderFilter.doFilter(PortalClassLoaderFilte
r.java:74)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(Invo
kerFilterChain.java:204)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:109)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.liferay.portal.kernel.bean.ClassLoaderBeanHandler.invoke(ClassLoaderBeanHandler.java:
67)
at $Proxy646.doFilter(Unknown Source)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:116)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFil
ter(InvokerFilterChain.java:165)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:96)
at com.liferay.portal.kernel.servlet.PortalClassLoaderFilter.doFilter(PortalClassLoaderFilte
r.java:74)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(Invo
kerFilterChain.java:204)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:109)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.ja
va:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j
ava:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:102
3)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.jav
a:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
我的view.jsp代码是，
<%@ page import="com.liferay.portal.model.User" %>
<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
<%@ taglib uri="http://liferay.com/tld/theme" prefix="theme" %>
<portlet:defineObjects />
<theme:defineObjects />
<%
DataInputStream in = new DataInputStream (request.getInputStream());
StringBuffer buffer = new StringBuffer();
int value;
while ((value=in.read()) != -1) {
buffer.append((char)value);
}
String formData = buffer.toString();
%>
<%
String fullname= user.getFullName();
System.out.println("Full name is: "+fullname);
%>
<h1>Welcome to Liferay MVC Employee Portlet</h1>
如果我从代理 portlet 调用 view.jsp，如何获取登录用户详细信息？
在 portlet 世界中，您首先失去控制的是您的 URL。如果您通过 servlet 请求请求 jsp 文件（就像您在问题的评论中提到的那样），您将有一个明显绕过门户的 servlet 请求（门户请求将通过 <portlet:actionURL .../> 或<portlet:renderURL .../>)
所以，你说的这种做法在门户界是完全错误的。您可以通过 <portlet:resourceURL .../> 并利用 portlet 的资源阶段。但是，出于可维护性的原因，我认为从另一个 portlet 的角度来处理一个 portlet 是一种不好的做法，我宁愿建议完全重新考虑体系结构。
由于我不完全理解潜在的问题，所以我无法给出将架构更改为什么的建议。
我有一个代理 portlet 和一个通用 portlet。在这里，我将 Post 数据从代理 portlet 发送到通用 portlet。在发送数据时，我使用 post 方法并发送到 view.jsp 页面。在 view.jsp 中，我能够通过输入流获取表单数据。现在的问题是我需要在通用 portlet 中获取登录用户详细信息，如果我单独 运行 我的通用 portlet 我能够获取用户详细信息。但是我从代理 portlet 调用 view.jsp 我无法获取用户详细信息。可能是通用 portlet 未初始化如果我从代理 porlet 调用 view.jsp 所以它会抛出以下错误，
9 Mar, 2015 8:35:22 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [jsp] in context with path [/Producer-portlet] threw exception
[An exception occurred processing JSP page /html/jsp/view.jsp at line 71
68: %>
69:
70: <%
71: String fullname= user.getFullName();
72: System.out.println("Full name is: "+fullname);
73: %>
74:
Stacktrace:] with root cause
java.lang.NullPointerException
at org.apache.jsp.html.jsp.view_jsp._jspService(view_jsp.java:254)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j
ava:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:116)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.liferay.portal.kernel.bean.ClassLoaderBeanHandler.invoke(ClassLoaderBeanHandler.java:
67)
at $Proxy646.doFilter(Unknown Source)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:116)
at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:169)
at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:123)
at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:59)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(Invo
kerFilterChain.java:204)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:109)
at com.liferay.portal.kernel.servlet.PortalClassLoaderFilter.doFilter(PortalClassLoaderFilte
r.java:74)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(Invo
kerFilterChain.java:204)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:109)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.liferay.portal.kernel.bean.ClassLoaderBeanHandler.invoke(ClassLoaderBeanHandler.java:
67)
at $Proxy646.doFilter(Unknown Source)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:116)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFil
ter(InvokerFilterChain.java:165)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:96)
at com.liferay.portal.kernel.servlet.PortalClassLoaderFilter.doFilter(PortalClassLoaderFilte
r.java:74)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(Invo
kerFilterChain.java:204)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilt
erChain.java:109)
at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.ja
va:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j
ava:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:102
3)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.jav
a:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
我的view.jsp代码是，
<%@ page import="com.liferay.portal.model.User" %>
<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
<%@ taglib uri="http://liferay.com/tld/theme" prefix="theme" %>
<portlet:defineObjects />
<theme:defineObjects />
<%
DataInputStream in = new DataInputStream (request.getInputStream());
StringBuffer buffer = new StringBuffer();
int value;
while ((value=in.read()) != -1) {
buffer.append((char)value);
}
String formData = buffer.toString();
%>
<%
String fullname= user.getFullName();
System.out.println("Full name is: "+fullname);
%>
<h1>Welcome to Liferay MVC Employee Portlet</h1>
如果我从代理 portlet 调用 view.jsp，如何获取登录用户详细信息？
在 portlet 世界中，您首先失去控制的是您的 URL。如果您通过 servlet 请求请求 jsp 文件（就像您在问题的评论中提到的那样），您将有一个明显绕过门户的 servlet 请求（门户请求将通过 <portlet:actionURL .../> 或<portlet:renderURL .../>)
所以，你说的这种做法在门户界是完全错误的。您可以通过 <portlet:resourceURL .../> 并利用 portlet 的资源阶段。但是，出于可维护性的原因，我认为从另一个 portlet 的角度来处理一个 portlet 是一种不好的做法，我宁愿建议完全重新考虑体系结构。
由于我不完全理解潜在的问题，所以我无法给出将架构更改为什么的建议。