移動大腦-SpringMVc搭建RestFul後臺服務（三）-RestFul接口編寫（模擬用戶註冊登錄）

目錄：

移動大腦-SpringMVc搭建RestFul後臺服務（一）-環境搭建

移動大腦-SpringMVc搭建RestFul後臺服務（二）-配置mysql數據庫

移動大腦-SpringMVc搭建RestFul後臺服務（四）-添加Token攔截器

移動大腦-SpringMVc搭建RestFul後臺服務（五）-支付寶支付

移動大腦-SpringMVc搭建RestFul後臺服務（六）-微信支付（Android）

移動大腦-SpringMVc搭建RestFul後臺服務（七）-增量更新

接着上一篇博客《移動大腦-SpringMVc搭建RestFul後臺服務（二）-配置mysql數據庫》，已經配置好了Mysql數據庫，現在開始編寫RestFul接口了，模擬實現用戶的註冊（PUT）和登錄（POST）兩個接口：

還是最經典的action-service-dao結構

一、創建UserDao.java接口和實現類UserDaoImpl.java

package com.ywl5320.appservice.dao;

import com.ywl5320.appservice.bean.UserBean;

/**
 * Created by ywl5320 on 2017/10/12.
 */
public interface UserDao {

    /**
     * 註冊
     * @param userBean
     */
    UserBean registor(UserBean userBean);

    /**
     * 登陸
     * @return
     */
    UserBean login(String phone, String password);

    /**
     * 根據名字獲取用戶信息
     * @param phone
     * @return
     */
    UserBean getUser(String phone);

}

package com.ywl5320.appservice.dao;

import com.ywl5320.appservice.bean.UserBean;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;

import java.util.List;

/**
 * Created by ywl5320 on 2017/10/12.
 */
public class UserDaoImpl extends HibernateDaoSupport implements UserDao {

    public UserBean login(String phone, String password) {
        List<UserBean> users = (List<UserBean>) this.getHibernateTemplate().find("from UserBean where phone=? and password=?", phone, password);
        if(users != null && users.size() > 0)
        {
            return users.get(0);
        }
        return null;
    }

    public UserBean registor(UserBean userBean) {
        this.getHibernateTemplate().save(userBean);
        return getUser(userBean.getPhone());
    }

    public UserBean getUser(String phone) {
        List<UserBean> users = (List<UserBean>) this.getHibernateTemplate().find("from UserBean where phone=?", phone);
        if(users != null && users.size() > 0)
        {
            return users.get(0);
        }
        return null;
    }
}

這裏實現類繼承了HibernateDaoSupport類，就可以使用hibernate的語句操作數據庫了。

二、編寫UserService.java類

package com.ywl5320.appservice.service;

import com.ywl5320.appservice.bean.RestFulBean;
import com.ywl5320.appservice.bean.UserBean;
import com.ywl5320.appservice.dao.UserDao;
import com.ywl5320.appservice.util.RestFulUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.transaction.annotation.Transactional;

/**
 * Created by ywl5320 on 2017/10/12.
 */
@Transactional
public class UserService {

    @Autowired
    private UserDao userDao;

    public RestFulBean<UserBean> registorServer(UserBean userBean)
    {
        UserBean user = userDao.getUser(userBean.getPhone());
        if(user != null)
        {
            return RestFulUtil.getInstance().getResuFulBean(null, 1, "已經註冊過了");
        }
        else
        {

            user = userDao.registor(userBean);
            if(user != null)
            {
                return RestFulUtil.getInstance().getResuFulBean(user, 0, "註冊成功");
            }
            else{
                return RestFulUtil.getInstance().getResuFulBean(null, 1, "註冊失敗");
            }
        }

    }

    public RestFulBean<UserBean> login(String phone, String password)
    {
        UserBean user = userDao.login(phone, password);
        if(user != null)
        {
            return RestFulUtil.getInstance().getResuFulBean(user, 0, "登錄成功");
        }
        else
        {
            return RestFulUtil.getInstance().getResuFulBean(null, 1, "用戶不存在");
        }
    }

}

這裏用了註解@Transactional和@Autowired來自動掃描service和注入實體類。

三、在beans.xml中配置service和dao

<!-- 配置server -->
    <bean id="loginService" class="com.ywl5320.appservice.service.UserService"/>
    <!-- 配置dao -->
    <bean id="userDaoImpl" class="com.ywl5320.appservice.dao.UserDaoImpl">
        <property name="sessionFactory" ref="sessionFactory"></property>
    </bean>

四、編寫UserAction.java

package com.ywl5320.appservice.action;

import com.ywl5320.appservice.bean.RestFulBean;
import com.ywl5320.appservice.bean.UserBean;
import com.ywl5320.appservice.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

/**
 * Created by ywl5320 on 2017-10-2.
 */
@Controller
@RequestMapping("/user")
public class UserAction {

    @Autowired
    private UserService userService;


    /**
     * 註冊
     * @param userBean
     * @return
     */
    @ResponseBody
    @RequestMapping(value="/register.do", method= RequestMethod.PUT)
    public RestFulBean<UserBean> register(@RequestBody UserBean userBean)
    {
        return userService.registorServer(userBean);
    }

    /**
     * 登錄
     * @param phone
     * @return
     */
    @ResponseBody
    @RequestMapping(value="/loginbypwd.do", method= RequestMethod.POST)
    public RestFulBean<UserBean> loginByPwd(String phone, String password)
    {
        System.out.println("phone:" + phone);
        return userService.login(phone, password);
    }

}

註冊接口：/user/register.do

登錄接口：/user/loginbypwd.do

RestFulUtil.java

package com.ywl5320.appservice.util;

import com.ywl5320.appservice.bean.RestFulBean;

/**
 * Created by ywl5320 on 2017-10-15.
 */
public class RestFulUtil<T> {

    private RestFulUtil(){}

    public static RestFulUtil getInstance()
    {
        return new RestFulUtil();
    }

    public RestFulBean<T> getResuFulBean(T o, int status, String msg)
    {
        RestFulBean<T> objectRestFulBean = new RestFulBean<T>();
        objectRestFulBean.setStatus(status);
        objectRestFulBean.setMsg(msg);
        objectRestFulBean.setData(o);
        return objectRestFulBean;
    }

}

整體目錄如下：