SQL——Hibernate SQL增删改查

1.查询list数据

　　实例：user login

public String userLogin(){
        Session session = HibernateSessionFactory.getSession();
        Transaction tran = session.beginTransaction();
        String sqlString = "select * from userinfo where username='"+user.getUsername()+"' and password='"+user.getPassword()+"'";
        ulist = session.createSQLQuery(sqlString).addEntity(UserInfo.class).list();//通过sql语句查询列表
        session.close();
                                    //使用迭代器遍历每个用户
        Iterator it = ulist.iterator();
        while(it.hasNext()){
            user = (UserInfo) it.next();
        }
                                    //控制台输出
        System.out.println(ulist.size()+"--"+user.getUsername()+user.getPassword()+"-- id:"+user.getUserid());
        if(ulist.size()==0){
            return "ERROR";
        }
        return "SUCCESS";
    }

　　实例：查询所有数据

/**
     * persons list 显示person列表信息
     */
    @SuppressWarnings("unchecked")
    public String personList(){
        Session session = HibernateSessionFactory.getSession();
        Transaction tran = session.beginTransaction();
        String hqlString = "select * from person";
        plist = session.createSQLQuery(hqlString).addEntity(Person.class).list();
        //获取session，存储list列表
        ActionContext actionContext = ActionContext.getContext();
        Map<String, Object> s = actionContext.getSession();
        s.put("personList", plist);
        session.close();
        return "SUCCESS";
    }

---

2.通过sql添加数据

public String addPerson(){
        Session session = HibernateSessionFactory.getSession();
        Transaction tran = session.beginTransaction();
        String sql = "INSERT INTO person (SELECT MAX(personid+1)," +//找出最大的id+1 赋给新的id
                        "'"+person.getPersonname()+"'," +
                        "'"+person.getMobilephone1()+"'," +
                        "'"+person.getMobilephone2()+"'," +
                        "'"+person.getSex()+"'," +
                        "'"+person.getBirthday()+"'," +
                        "'"+person.getPnative()+"'," +
                        "'"+person.getAddress()+"'," +
                        "'"+person.getEmail()+"'," +
                        "'"+person.getDescribe()+"'," +
                        +person.getGroupid()+
                    " FROM person)";
        session.createSQLQuery(sql).executeUpdate();//执行更新操作
        tran.commit();
        System.out.println(person.getPersonid()+"--"+person.getPersonname());
        session.close();
        return "SUCCESS";
    }

---

3.根据id查找数据

/**
     * 根据id找到person
     * @param id
     * @return
     */
    public String findPersonById(){
        int personid = Integer.parseInt(ServletActionContext.getRequest().getParameter("id"));
        Session session = HibernateSessionFactory.getSession();
        session.load(person, personid);//根据id查询一条记录
        //获取session，存储list列表
        ActionContext actionContext = ActionContext.getContext();
        Map<String, Object> s = actionContext.getSession();
        s.put("person", person);
        session.close();
        return "SUCCESS";
    }

---

4.删除一条记录

/**
     * 根据id删除person
     * @return
     */
    public String deletePerson(){
        int personid = Integer.parseInt(ServletActionContext.getRequest().getParameter("id"));
        person.setPersonid(personid);

        Session session = HibernateSessionFactory.getSession();
        Transaction tran = session.beginTransaction();
        session.delete(person);
        tran.commit();
        return "SUCCESS";
    }

5.更新一条记录

/**
     * 根据id更新person
     * @return
     */
    public String updatePerson(){
        Session session = HibernateSessionFactory.getSession();
        Transaction tran = session.beginTransaction();
        String sql = "UPDATE person SET " +
                        "personname='"+person.getPersonname()+"'," +
                        "mobilephone1='"+person.getMobilephone1()+"'," +
                        "mobilephone2='"+person.getMobilephone2()+"'," +
                        "sex='"+person.getSex()+"'," +
                        "birthday='"+person.getBirthday()+"'," +
                        "native='"+person.getPnative()+"'," +
                        "address='"+person.getAddress()+"'," +
                        "email='"+person.getEmail()+"'," +
                        "pdescribe='"+person.getDescribe()+"',"+
                        "groupid="+person.getGroupid()+
                    " WHERE personid=" +person.getPersonid();
        session.createSQLQuery(sql).executeUpdate();
        tran.commit();
        session.close();
        return "SUCCESS";
    }