SpringMVC+ibatis+MySQL+MongoDB构建博客系统（二）

三、dao层的实现

构建UserDao接口，并使用@Respository将其注射到spring容器中。

package com.jcx.blog.dao;import com.jcx.blog.domain.po.User;import org.springframework.stereotype.Repository;import java.util.List;/** * Created by jichenxiao on 2016/4/6. */@Repositorypublic interface UserDao {    List<User> selectAllUser();    public void addUser(User user);    public User selectUserByNickname(String nickname);}

在编写UserDao的实现类之前，需要编写BaseDao类，因为所有的实现类都要集成

package com.jcx.blog.dao;/** * Created by jichenxiao on 2016/4/6. */public class BaseDao extends org.springframework.orm.ibatis.support.SqlMapClientDaoSupport{    @javax.annotation.Resource(name = "sqlMapClient")    private com.ibatis.sqlmap.client.SqlMapClient sqlMapClient;    @javax.annotation.PostConstruct    public void initSqlMapClient(){        super.setSqlMapClient(sqlMapClient);    }}

接下来开始编写实现类。

package com.jcx.blog.dao.impl;import com.jcx.blog.dao.BaseDao;import com.jcx.blog.dao.UserDao;import com.jcx.blog.domain.po.User;import org.springframework.stereotype.Component;import java.util.List;/** * Created by jichenxiao on 2016/4/6. */@Component("userDao")public class UserDaoImpl extends BaseDao implements UserDao {    @Override    public List<User> selectAllUser() {           return (List<User>) getSqlMapClientTemplate().queryForList("User.selectAllUser");    }    @Override    public void addUser(User user) {        getSqlMapClientTemplate().insert("User.addUser", user);    }    @Override    public User selectUserByNickname(String nickname) {        return (User)getSqlMapClientTemplate().queryForObject("User.selectUserByNickname",nickname);    }}

四、service层

服务层主要完成了对dao层的调用以及一些其他的逻辑操作。用户管理服务通过UserSercvice实现，UserService.java如下。

package com.jcx.blog.service;import com.jcx.blog.domain.po.User;import javax.servlet.http.HttpServletRequest;import java.util.List;/** * Created by jichenxiao on 2016/4/7. */public interface UserService {    List<User> selectAllUser();    public void addUser(HttpServletRequest request);    public String selectUserByNickname(HttpServletRequest request);}

UserServiceImpl.java实现类如下所示，主要完成了对dao层的调用。

<span style="font-size:14px;">package com.jcx.blog.service.impl;import com.jcx.blog.dao.UserDao;import com.jcx.blog.domain.po.User;import com.jcx.blog.service.UserService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;import javax.servlet.http.HttpServletRequest;import java.util.List;/** * Created by jichenxiao on 2016/4/7. */@Service(value = "UserService")public class UserServiceImpl implements UserService{    @Autowired    private UserDao userDao;    @Override    public List<User> selectAllUser() {        return userDao.selectAllUser();    }    @Transactional    @Override    public void addUser(HttpServletRequest request) {        String nickname = request.getParameter("nickname");        String password = request.getParameter("password");        String first_name = request.getParameter("first_name");        String last_name = request.getParameter("last_name");        User user = new User();        user.setNickname(nickname);        user.setPassword(password);        user.setFirst_name(first_name);        user.setLast_name(last_name);        userDao.addUser(user);    }    @Override    public String selectUserByNickname(javax.servlet.http.HttpServletRequest request) {        String nickname = request.getParameter("nickname");        String password = request.getParameter("password");        User user = userDao.selectUserByNickname(nickname);        if(user != null && user.getPassword().equals(password))            return "success";        else            return "fail";    }}</span><span style="font-family:Microsoft YaHei;font-size:18px;"></span>

五、控制层

控制层即controller在web模块中，作用是接收前端的请求，并调用服务层进行相应的处理。UserController如下所示。

package com.jcx.blog.controller;import com.jcx.blog.domain.po.User;import com.jcx.blog.service.UserService;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.ui.ModelMap;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import javax.servlet.http.HttpServletRequest;import java.util.List;/** * Created by jichenxiao on 2016/4/7. */@Controllerpublic class UserController {    @Autowired    private UserService userService;    @RequestMapping(value = "/", method = RequestMethod.GET)    public String index(){        return "index";    }    @RequestMapping(value = "/error", method = RequestMethod.GET)    public String error(){        return "error";    }    @RequestMapping(value = "/userlist", method = RequestMethod.GET)    public String getUserList(ModelMap modelMap){        List<User> userList = userService.selectAllUser();        modelMap.addAttribute("userList",userList);        return "userList";    }    @RequestMapping(value = "/addUserP", method = RequestMethod.POST)    public String addUser(HttpServletRequest request){        userService.addUser(request);        return "redirect:/userlist";    }    @RequestMapping(value = "/login", method = RequestMethod.GET)    public String login(){        return "login";    }    @RequestMapping(value = "/logincheck", method = RequestMethod.POST)    public String loginCheck(HttpServletRequest request){        String result = userService.selectUserByNickname(request);        if(result.equals("success"))            return "redirect:/userlist";        else            return "redirect:/error";    }}

至此，所有后台开发的流程已经完成，视图层将在后续继续开发，目前使用JSP进行调试。

未完待续。