小编use*_*679的帖子

当我写作

Session session = sessionFactory.getCurrentSession();
List<Candidate> candidates = (List<Candidate>) session.createQuery(
        "select Candidate from Candidate as candidate  left outer join"
        + " candidate.skills as skill    where skill.id =" + 1).list();

我已经在第二线了

如果我写

Session session = sessionFactory.getCurrentSession();
List<Candidate> candidates = (List<Candidate>) session.createSQLQuery(
        "select candidate.* from candidate inner join candidate_skill"
        + " on candidate.id = candidate_skill.candidate_id"
        + " inner join skill on candidate_skill.skill_id = skill.id"
        + " where skill.id = 1").list();

我有好结果

为什么我在第一个例子中有NPE？

严重:Servlet [appServlet]的Servlet.service()在路径[/ ui]的上下文中引发异常[请求处理失败; 嵌套异常是java.lang.NullPointerException],原因是org.hibernate.dialect.function.SQLFunctionRegistry.findSQLFunction(SQLFunctionRegistry.java:41)中的根本原因java.lang.NullPointerException

如何在Windows中为jvm添加PermGen空间？我发现很多关于它的链接？但我不明白我必须点击并写下新值

 List<Candidate> candidates = (List<Candidate>) session.createSQLQuery("select candidate.* from candidate inner join candidate_skill on candidate.id = candidate_skill.candidate_id inner join skill on candidate_skill.skill_id = skill.id where skill.id = 1");       

我明白了:

 java.lang.ClassCastException: org.hibernate.internal.SQLQueryImpl cannot be cast to java.util.List

查询是正确的.怎么解决？

如果他登录我想输出userName.来自@Controller我有权访问:

@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";
    }

它工作如果我在jsp上使用名称,我看到键入的名称.

但如果在这个jsp我写

 <%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags" %>
    <sec:authentication property="principal.username"/>

我得到stackTrace:

 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 …