一个小的jsf+mybatis的项目

package com.dhcc.service.impl; import java.util.ArrayList; import java.util.List; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import com.dhcc.mapper.StudentMapper; import com.dhcc.pojo.Student; import com.dhcc.service.StudentService; import com.dhcc.util.MyBatisUtil; public class StudentServiceImpl implements StudentService { static SqlSessionFactory sqlSessionFactory = null; static { sqlSessionFactory = MyBatisUtil.getSqlSessionFactory(); } private StudentMapper studentMapper; @Override public void addStudent(Student student) { SqlSession sqlSession=sqlSessionFactory.openSession(); try{ studentMapper=sqlSession.getMapper(StudentMapper.class); this.studentMapper.addStudent(student); sqlSession.commit(); }finally{ sqlSession.close(); } } @Override public void deleteStudent(int id) { SqlSession sqlSession=sqlSessionFactory.openSession(); try{ studentMapper=sqlSession.getMapper(StudentMapper.class); this.studentMapper.deleteStudent(id); sqlSession.commit(); }finally{ sqlSession.close(); } } @Override public List<Student> queryAllStudent() { SqlSession sqlSession=sqlSessionFactory.openSession(); try{ studentMapper=sqlSession.getMapper(StudentMapper.class); List<Student> list=new ArrayList<Student>(); list=studentMapper.queryAllStudent(); // for(int i=0;i<list.size();i++){ // Student student=list.get(i); // System.out.println(student.getId()+student.getName()+student.getBlongclass()); // } return list; }finally{ sqlSession.close(); } } @Override public Student queryStudent(int id) { SqlSession sqlSession=sqlSessionFactory.openSession(); try{ studentMapper=sqlSession.getMapper(StudentMapper.class); return this.studentMapper.queryStudent(id); }finally{ sqlSession.close(); } } @Override public void updateStudent(Student student) { SqlSession sqlSession=sqlSessionFactory.openSession(); try{ studentMapper=sqlSession.getMapper(StudentMapper.class); this.studentMapper.updateStudent(student); sqlSession.commit(); }finally{ sqlSession.close(); } } // public static void main(String[] args){ // StudentService studentService=new StudentServiceImpl(); // List<Student> list=studentService.queryAllStudent(); // for(int i=0;i<list.size();i++){ // Student student=list.get(i); // System.out.println(student.getId()+student.getName()+student.getBlongclass()); // } // } }