java.lang.NullPointerException

[福清仔]

Exception in thread "main" java.lang.NullPointerException
at com.f0802.friend.dao.imp.UsersDaoImp.addUsers(UsersDaoImp.java:11)
at com.f0802.friend.biz.UsersBizImp.addUsers(UsersBizImp.java:11)
at com.f0802.friend.test.UsersTest.addUsers(UsersTest.java:33)
at com.f0802.friend.test.UsersTest.main(UsersTest.java:13)

类:
public class UsersTest {

public static void main(String[] args) {
// TODO Auto-generated method stub
addUsers();

}
public static void addUsers() {
Users u=new Users();
u.setLoginName("admin");
u.setPassword("123456");
u.setName("小张");
u.setGradenumber(100);
UsersBizImp ubi=new UsersBizImp();
ubi.addUsers(u);
}
}

[chenliuyang]

sessionFactory要注入UserBizImp啊

[好吃的松子]

对，sessionfactory要注入

[好吃的松子]

另外，请问biz是取自哪个单词？

[wow415411408]

与楼上同问

[oklinsong]

空指针错误，去UsersBizImp 里的addUsers方法里看看。

[knightzhuwei]

UsersBizImp是什么？

[福清仔]

users的Hibernate配置:
<hibernate-mapping>
<class name="com.f0802.friend.entity.Users" table="users" schema="dbo" catalog="friend">
<id name="id" type="java.lang.Integer">
<column name="id" />
<generator class="native" />
</id>
<property name="name" type="java.lang.String">
<column name="name" length="20" not-null="true" />
</property>
<property name="loginName" type="java.lang.String">
<column name="loginName" length="20" not-null="true" />
</property>
<property name="password" type="java.lang.String">
<column name="password" length="20" not-null="true" />
</property>
<property name="gradenumber" type="java.lang.Integer">
<column name="gradenumber" not-null="true" />
</property>
<set name="topics" inverse="true" cascade="delete" >
<key>
<column name="uid" not-null="true" />
</key>
<one-to-many class="com.f0802.friend.entity.Topic" />
</set>
<set name="articleses" inverse="true" cascade="delete" >
<key>
<column name="authorId" not-null="true" />
</key>
<one-to-many class="com.f0802.friend.entity.Articles" />
</set>
<set name="usersgrades" inverse="true" cascade="delete" >
<key>
<column name="usersId" not-null="true" />
</key>
<one-to-many class="com.f0802.friend.entity.Usersgrade" />
</set>
<set name="replies" inverse="true" cascade="delete" >
<key>
<column name="uid" not-null="true" />
</key>
<one-to-many class="com.f0802.friend.entity.Reply" />
</set>
<set name="userInfos" inverse="true" cascade="delete" >
<key>
<column name="usersId" not-null="true" />
</key>
<one-to-many class="com.f0802.friend.entity.UserInfo" />
</set>
<set name="messageses" inverse="true" cascade="delete" >
<key>
<column name="usersId" not-null="true" />
</key>
<one-to-many class="com.f0802.friend.entity.Messages" />
</set>
<set name="friendsForUsersId" inverse="true" cascade="delete" >
<key>
<column name="usersId" not-null="true" />
</key>
<one-to-many class="com.f0802.friend.entity.Friend" />
</set>
<set name="friendsForFriendId" inverse="true" cascade="delete" >
<key>
<column name="friendId" not-null="true" />
</key>
<one-to-many class="com.f0802.friend.entity.Friend" />
</set>
</class>
</hibernate-mapping>

[福清仔]

public class UsersBizImp extends HibernateDaoSupport implements UsersBiz {

public void addUsers(Users users) {
this.getHibernateTemplate().save(users);

}

}

[yy357510564]

UsersBizImp 没这东西啊

[shandaopi]

真是个好东西

[mlhm2]

去UsersDaoImp的第11行找，错误在那儿

[lh_fengyuzhe]

this.getHibernateTemplate()没有取到值吧

[jiangjinsong]

public void saveBookTest(){
Book book=new Book();
book.setBookAuthor("Eric");
book.setBookContent("ok");
book.setBookName("123456");
book.setBookIsbn("isbn");
book.setBookPages("12");
book.setBookPrice("12.2");
book.setBookPublish("cbs");
book.setBookPublishDate(new Date());
System.out.print(book.toString());
Catelog catlog=new Catelog();
catlog.setCatelogName("cat1");
catlog.getBookList().add(book);
System.out.print(this.getSessionFactory().toString());
// this.getHibernateTemplate().save(catlog);
// this.getHibernateTemplate().save(book);

} 我这样也报空指针异常 请大家帮忙看看 O(∩_∩)O~

[windgh]

很明显了，this.getSessionFactory()取不到东西，找找配置的原因吧

[hzq237]

顶！

[focusforce]

UsersDaoImp.java:11行，很清晰了啊，去看看吧，debug也行。

[GG_wg]

没有获取到 UsersDaoImp 实例 ，查看你的配置文件