myatis 的 一直报空指针异常

[toward_south]

这是测试的代码：

public class Test {
	public static void main(String [] args){
		Logger log=Logger.getLogger(Test.class);
		SqlSession sqlSession=null;
		try{
			
			sqlSession=SqlSessionFactoryUtils.openSqlSession();
			System.out.println("111"+sqlSession);
			//userMapper usermapper=sqlSession.getMapper(userMapper.class);
			System.out.println(111);
			workerMapper workermapper=sqlSession.getMapper(workerMapper.class);
			/*User user=new User();
			user.setId(1);
			user.setPassword(1223360)*/;
			Worker worker=new Worker();
			worker.setId(1);
			worker.setOfficenumber(111);
			worker.setMobilephone(222);
			worker.setProfile("大集合");
			worker.setHabbt("吃瓜");
			System.out.println(1111);
			List<Worker>list=new ArrayList<Worker>();
			//RowBounds rowBounds=new RowBounds(0,10);
			int pwd=workermapper.updateWorker(worker);
			log.info(pwd);
			sqlSession.commit();
		}catch(Exception ex){
			
			sqlSession.rollback();
		}finally{
			if(sqlSession != null){
				sqlSession.close();
			}
		}
	}

这是接口：

public interface workerMapper {
	//更新工人信息接口
	public int updateWorker(Worker worker);
	//查找
	public List<Worker> findWorker(int id);
	//信息展示-分页处理
	public List<Worker>findByRowBounds(RowBounds rowBounds,int id);
	//信息查询
	public List<Worker>findByName(@Param("name") String name);
	//根据ID查人名
	public String findById(int id);
}

这是mapper.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.mapper.workerMapper">

	<update id="updateWorker" parameterType="worker">
		update p_worker
		 <set>
			<if test="officenumber != 0 and mobilephone!=0">
				W_PROFILE=#{profile},W_MOBILE_PHONE= #{mobilephone},W_OFFICE_PHONE= #{officenumber},W_HABBY= #{habby}
			</if>			 
		 </set>
		 where W_NUMBER=#{id} 
	</update>
	<select id="findWorker" parameterType="java.lang.Integer" resultType="worker">
		select W_NAME as name,W_OFFICE_PHONE as officenumber,W_MOBILE_PHONE as mobilephone,W_PROFILE as profile,W_HABBY as habby from p_worker
		where W_NUMBER=#{id}
	</select>
	<select id="findByRowBounds" parameterType="java.lang.Integer" resultType="worker">
		select W_NAME as name,W_OFFICE_PHONE as officenumber,W_PROFILE as profile,W_HABBY as habby from p_worker
	</select>
	<select id="findByName" resultType="worker">
		select W_NAME as name,W_OFFICE_PHONE as officenumber,W_PROFILE as profile,W_HABBY as habby from p_worker
		<where>
			<if test="name!=null and name !=''">
				and W_NAME like concat('%',#{name},'%')
			</if>
		</where>
	</select>
	<select id="findById" parameterType="java.lang.Integer" resultType="String">
		select W_NAME AS name from p_worker 
		where 1=1
		<if test="_parameter!=null">
			and W_NUMBER=#{_paramter};
		</if> 
	</select>
</mapper>

获取sqlsession

public class SqlSessionFactoryUtils {
	
private final static Class<SqlSessionFactoryUtils> LOCK = SqlSessionFactoryUtils.class;
	
	private static SqlSessionFactory sqlSessionFactory=null;
	
	private SqlSessionFactoryUtils () {
		
	}
		public static SqlSessionFactory getSqlSessionFactory(){
			synchronized(LOCK){
				if(sqlSessionFactory != null){
					return sqlSessionFactory;
				}
				String resource="mybatis-config.xml";
				InputStream inputStream;
				try{
					inputStream=Resources.getResourceAsStream(resource);
					sqlSessionFactory =(SqlSessionFactory) new SqlSessionFactoryBuilder().build(inputStream);
				}catch(IOException ex){
					ex.printStackTrace();
					return null;
				}
			}
			return sqlSessionFactory;
			
		}
		
		public static SqlSession openSqlSession(){
			if(sqlSessionFactory == null){
				getSqlSessionFactory();
			}
			return sqlSessionFactory.openSession();
			
		}


}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
	<typeAliases>
		<typeAlias alias="worker" type="com.pojo.Worker"/>
		<typeAlias alias="user" type="com.pojo.User"/>
		<typeAlias alias="plan" type="com.pojo.Plan"/>
		<typeAlias alias="plan" type="com.pojo.Job"/>
	</typeAliases>
	<environments default="development">
		<environment id="development">
			<transactionManager type="JDBC"/>
			<dataSource type="POOLED">
				<property name="driver" value="com.mysql.jdbc.Driver"></property>
				<property name="url" value="jdbc:mysql://localhost:3306/oa?useSSL=false"/>
				<property name="username" value="root"/>
				<property name="password" value="1223360222"/>
			</dataSource>
		</environment>
	</environments>
	<mappers>
		<mapper resource="com/mapper/usermapper.xml"></mapper>
		<mapper resource="com/mapper/workermapper.xml"></mapper>
		<mapper resource="com/mapper/planmapper.xml"></mapper>
		<mapper resource="com/mapper/jobmapper.xml"></mapper>
	</mappers>

</configuration>

网上大多数方法我都试了，但是一直都是空指针。问下大佬们这是什么问题？