sping mvc 结合 hibernate 实现用户登录功能(二)！

第一步:写个实体类：

package com.spring.entity;

import javax.persistence.Column;
//import javax.persistence.GeneratedValue;
//import javax.persistence.GenerationType;
import javax.persistence.Id;
@javax.persistence.Entity
@javax.persistence.Table(name = "user")
public class User {
    @Id
    /*@GeneratedValue(strategy=GenerationType.IDENTITY)*/
    @Column(name="id")
    private Integer id;
    
    @Column(name="username")
    private String username;
    
    @Column(name="password")
    private String password;
    
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
}

第二步：Dao层UserDaoImpl ：注意（接口未写上，请自己添加）

package com.spring.dao;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.springframework.dao.DataAccessException;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import org.springframework.transaction.annotation.Transactional;

import com.spring.entity.User;

public class UserDaoImpl extends HibernateDaoSupport implements UserDao {
    @Transactional
    public boolean login(String username, String password) {
        // TODO Auto-generated method stub
        if(username==null){
            username="";
        }
        if(password==null){
            password="";
        }
        List<User> list = null;
        String hql="select user.username ,user.password from User as user where user.username='"+username+"' and user.password = '"+password+"'";
        
        try {
            Session session = getHibernateTemplate().getSessionFactory().getCurrentSession();
            Query query =session.createQuery(hql);
            System.out.println("@@@@@@@@@");
            list = query.list();
            
        } catch (DataAccessException e) {
            // TODO: handle exception
            return false;
        }
        
        if(list.isEmpty()){
            return false;
        }
            return true;
    }

}

第三步：Service层UserServiceImpl ：注意（接口未写上，请自己添加）

package com.spring.service;

import org.springframework.beans.factory.annotation.Autowired;

import com.spring.dao.UserDao;

public class UserServiceImpl implements UserService {
    
    @Autowired
    UserDao userdao;
    
    public UserDao getUserdao() {
        return userdao;
    }

    public void setUserdao(UserDao userdao) {
        this.userdao = userdao;
    }

    public boolean login(String username, String password) {
        // TODO Auto-generated method stub
        boolean login = userdao.login(username, password);
        if(login){
            return true;
        }else{
            return false;
        }
    }

}

第四步：写controller：

package com.spring.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.spring.service.UserService;

@Controller
public class UserController {
    
    @Autowired
    UserService userservice;
    
    @RequestMapping("/welcome.do")
    public String login(String username , String password){
        System.out.println(username);
        if(userservice.login(username, password)){
            return "/success";
        }else{
            return "/error";
        }
    }
}

至此后台的java代码全部写完。 jsp页面请看：sping mvc 结合 hibernate 实现用户登录功能(三)！