Hibernate空指针异常

 

类文件

package cn.jmi.model;

public class Person {
private int id;
private String name;
private float height;
 void person()
{}
public int getId() {
 return id;
}
public void setId(int id) {
 this.id = id;
}
public String getName() {
 return name;
}
public void setName(String name) {
 this.name = name;
}
public float getHeight() {
 return height;
}
public void setHeight(float height) {
 this.height = height;
}

}

映射文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.jmi.model">
    <class name="Person" table="Person">
        <id name="id">
            <generator class="assigned" />
        </id>
        <property name="name"/>
        <property name="height"/>
     
       
    </class>
</hibernate-mapping>

配置文件

<!DOCTYPE hibernate-configuration PUBLIC
 "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
 <session-factory>
  
  <property name="hibernate.connection.driver_class">net.sourceforge.jtds.jdbc.Driver</property>
  <property name="hibernate.connection.username">sa</property>
  <property name="hibernate.connection.url">jdbc:sqlserver://localhost;database=user</property>
  <property name="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</property>
  <property name="hibernate.connection.password">111111</property>
  <property name="hbm2ddl.auto">validate</property>

  <mapping resource="cn/jmi/model/Person.hbm.xml" />
 </session-factory>
</hibernate-configuration>

测试类

package test;

import java.util.List;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import cn.jmi.model.Person;

public class Test extends HibernateDaoSupport{
 public List<Person> test()
 {
  List<Person> l = (List<Person>)getHibernateTemplate().find("from Person");
  //select * from dept
  return l;
 }
 public void test1()
 {
  Person person = (Person)getHibernateTemplate().get(Person.class, 1);
  System.out.println(person.getName());
 }
 public static void main(String[] args) {
 /*List<Person> l= new Test().test();
 for(Person p:l)
 {
  System.out.println(p.getId()+","+p.getName());
 }*/
  //new Test().test1();
 //System.out.print(new Test().test().get(0).getName()) ;
  Configuration config = new Configuration();
  config.configure();
  SessionFactory sf = config.buildSessionFactory();
  new Test().test1();
  Session s = sf.openSession();
  

 // System.out.println(new Test().test().get(0).getHeight());
  s.close();
  System.out.println("end");
 }
}

错误

Exception in thread "main" java.lang.NullPointerException
 at test.Test.test1(Test.java:21)
 at test.Test.main(Test.java:35)