如果他登录，我想输出用户名。从@Controller我可以访问：
@RequestMapping("/success")
public String success(Model model) {
Authentication auth = SecurityContextHolder.getContext().getAuthentication();
String name = auth.getName(); //get logged in username
model.addAttribute("name", name);
return "success";
}
如果我在 jsp 上使用名称，它会起作用，我会看到输入的名称。
但是如果在这个jsp中我写
<%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags" %>
<sec:authentication property="principal.username"/>
我得到堆栈跟踪：
INFO : com.epam.hhsystem.util.CustomAuthentificationProvider - User with name 'Nikolay_Tkachev' log in
07.08.2013 17:00:57 org.apache.jasper.compiler.TldLocationsCache tldScanJar
INFO: At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
07.08.2013 17:00:57 org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet jsp threw exception
org.springframework.beans.NotReadablePropertyException: Invalid property 'principal.username' of bean class [org.springframework.security.authentication.UsernamePasswordAuthenticationToken]: Bean property 'principal.username' is not readable or has an invalid getter method: Does the return type of the getter match the parameter type of the setter?
at org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:707)
at org.springframework.beans.BeanWrapperImpl.getPropertyValue(BeanWrapperImpl.java:699)
...