Spring的JdbcTemplate案例学生选课系统

public class Student {

    private int  id;
    private String name;
    private String  sex;

    private Date born;

    public Date getBorn() {
        return born;
    }

    public void setBorn(Date born) {
        this.born = born;
    }

    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 String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    @Override
    public String toString() {
        return "Student{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", sex='" + sex + '\'' +
                ", born=" + born +
                '}';
    }
}

public interface StudentDao {

     void  insert(Student  stu);
     void  update(Student stu);
     void  delete(int  id);
     Student select(int  id);
     List<Student> selectAll();

}

@Repository
public class StudentDaoImpl implements StudentDao {

    @Autowired
    JdbcTemplate jdbcTemplate;

    public void insert(Student stu) {
        String sql = "insert into student(name,sex,born) values(?,?,?)";

        jdbcTemplate.update(sql, stu.getName(), stu.getSex(), stu.getBorn());

    }

    public void update(Student stu) {

        String sql = "update student set name=?.sex=?,born=? where id=?";
        jdbcTemplate.update(sql, stu.getName(), stu.getSex(), stu.getBorn(), stu.getId());

    }

    public void delete(int id) {

        String sql = "delete from student where id=?";
        jdbcTemplate.update(sql, id);
    }

    public Student select(int id) {

        String  sql="select * from student where  id =?";

        return jdbcTemplate.queryForObject(sql,new StudentRowMapper(),id);
    }

    public List<Student> selectAll() {
        String  sql="select * from student ";
        return jdbcTemplate.query(sql,new StudentRowMapper());
    }

    private class StudentRowMapper implements RowMapper<Student> {
        public Student mapRow(ResultSet resultSet, int i) throws SQLException {
            Student student = new Student();
            student.setId(resultSet.getInt("id"));
            student.setName(resultSet.getString("name"));
            student.setSex(resultSet.getString("sex"));
            student.setBorn(resultSet.getDate("born"));
            return student;
        }
    }
}

public class Course {


    private int  id;
    private String name;
    private int score;

    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 int getScore() {
        return score;
    }

    public void setScore(int score) {
        this.score = score;
    }

    @Override
    public String toString() {
        return "Course{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", score=" + score +
                '}';
    }
}

public interface CourseDao {

    void  insert(Course  stu);
    void  update(Course stu);
    void  delete(int  id);
    Course select(int  id);
    List<Course> selectAll();
}

@Repository
public class CourseDaoImpl  implements CourseDao {
    @Autowired
    JdbcTemplate jdbcTemplate;
    public void insert(Course stu) {
        String sql = "insert into course(name,score) values(?,?)";

        jdbcTemplate.update(sql, stu.getName(),stu.getScore());
    }

    public void update(Course stu) {

        String sql = "update course set name=?,score=? where id=?";
        jdbcTemplate.update(sql, stu.getName(), stu.getScore(), stu.getId());
    }

    public void delete(int id) {

        String sql = "delete from course where id=?";
        jdbcTemplate.update(sql, id);
    }

    public Course select(int id) {
        String  sql="select * from course where  id =?";

        return jdbcTemplate.queryForObject(sql,new CourseRowMapper(),id);
    }

    public List<Course> selectAll() {
        String  sql="select * from course";
        return jdbcTemplate.query(sql,new CourseRowMapper());
    }
    private class CourseRowMapper implements RowMapper<Course> {
        public Course mapRow(ResultSet resultSet, int i) throws SQLException {
            Course student = new Course();
            student.setId(resultSet.getInt("id"));
            student.setName(resultSet.getString("name"));
            student.setScore(resultSet.getInt("score"));

            return student;
        }
    }
}

public class Selection {

    private  int sid;
    private int  cid;
    private Date selTime;
    private int  score;


    public int getSid() {
        return sid;
    }

    public void setSid(int sid) {
        this.sid = sid;
    }

    public int getCid() {
        return cid;
    }

    public void setCid(int cid) {
        this.cid = cid;
    }

    public Date getSelTime() {
        return selTime;
    }

    public void setSelTime(Date selTime) {
        this.selTime = selTime;
    }

    public int getScore() {
        return score;
    }

    public void setScore(int score) {
        this.score = score;
    }
}

public interface SelectionDao {

    void insert(List<Selection>  selections);
    void delete(int  sid,int cid);
    List<Map<String,Object>> selectByStudent(int sid);
    List<Map<String,Object>> selectByCourse(int cid);
}

@Repository
public class SelectionDaoImpl implements SelectionDao {
    @Autowired
    JdbcTemplate jdbcTemplate;

    public void insert(List<Selection> selections) {
        String sql = "insert into  selection(?,?,?,?)";


        List<Object[]>  list = new ArrayList<Object[]>();
        for (Selection selection : selections) {
            Object[] objects = new Object[4];
            objects[0] = selection.getSid();
            objects[1] = selection.getCid();
            objects[2] = selection.getSelTime();
            objects[3] = selection.getScore();
            list.add(objects);
        }

        jdbcTemplate.batchUpdate(sql, list);
    }

    public void delete(int sid,int cid) {
         String sql="delete from selection where student =? and course=?";
         jdbcTemplate.update(sql,sid,cid);
    }

    public List<Map<String, Object>> selectByStudent(int sid) {

        String sql="select se.*, stu.name sname ,cou.name cname from selection se " +
                "left join student stu on se.student=stu.id " +
                "left join course cou on se.course=cou.id"+
                "where student=?";

        return jdbcTemplate.queryForList(sql,sid);
    }

    public List<Map<String, Object>> selectByCourse(int cid) {

        String sql="select se.*, stu.name sname ,cou.name cname from selection se " +
                "left join student stu on se.student=stu.id " +
                "left join course cou on se.course=cou.id"+
                "where course=?";

        return jdbcTemplate.queryForList(sql,cid);
    }
}