Spring+Spring MVC+Spring JDBC+MySql实现简单登陆注册

Model层：

package com.model;

public class User {
    private int id;
    private String name;
    private String password;
    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 getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

}

UserDao:

package com.userdao;

public interface UserDao {
        public boolean check(String name,String passwod);
        public void addUser(String name,String password);
        public boolean unit(String name);
}

UserDaoImpl:

package com.userdaoimpl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;

import com.userdao.UserDao;

@Repository
public class UserDaoImpl implements UserDao{

    @Autowired
    JdbcTemplate jdbcTemplate;

    public JdbcTemplate getJdbcTemplate() {
        return jdbcTemplate;
    }

    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

    @Override
    public boolean check(String name, String passwod) {
        String sql = "select count(id) from u2 where name=? and password=?";
        int i  = jdbcTemplate.queryForInt(sql, new Object[]{name,passwod});
        if (i>0) {
            return true;
        } else {
            return false;
        }
    }

    @Override
    public void addUser(String name, String password) {
            String sql = "insert into u2 (name,password) values(?,?)";
            jdbcTemplate.update(sql,new Object[]{name,password});
    }

    @Override
    public boolean unit(String name) {
        String sql = "select count(id) from u2 where name=?";
        int rs = jdbcTemplate.queryForInt(sql,new Object[]{name});
        if (rs>0) {
            return true;
        }
        return false;
    }

}

Controller层：

package com.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import com.userdaoimpl.UserDaoImpl;

@Controller
public class LoginController {

    @Autowired
    UserDaoImpl userDaoImpl;

    public UserDaoImpl getUserDaoImpl() {
        return userDaoImpl;
    }

    public void setUserDaoImpl(UserDaoImpl userDaoImpl) {
        this.userDaoImpl = userDaoImpl;
    }

    @RequestMapping("/login")
    public String login(String name,String password,Model model) {
            boolean rs = userDaoImpl.check(name, password);
            if (rs==true) {
                model.addAttribute("name",name);
                return "index";
            } 
            return "error";
    }
    @RequestMapping("/register")
    public String register(String name,String password,Model model) {
        boolean rs = userDaoImpl.unit(name);
        if (rs==false) {
            userDaoImpl.addUser(name, password);
            return "login";
        } 
        return "error1";
    }

}

Spring配置文件：

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
    ">
    <context:component-scan base-package="com" />
     <bean id="dataSource"  
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">  
        <property name="driverClassName"  
            value="com.mysql.jdbc.Driver">  
        </property>  
        <property name="url"  
            value="jdbc:mysql://localhost:3306/mydata">  
        </property>  
        <property name="username" value="root"></property>  
        <property name="password" value="root"></property>  
    </bean>  

    <bean id="jdbcTemplate"  
        class="org.springframework.jdbc.core.JdbcTemplate" abstract="false"  
        lazy-init="false">  
        <property name="dataSource">  
            <ref bean="dataSource" />  
        </property>  
    </bean>  

    <bean
        class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />

    <!-- 配置视图解析器，将ModelAndView及字符串解析为具体的页面 -->
    <bean id="viewResolver"
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/" />
        <property name="suffix" value=".jsp" />
    </bean>

    </beans>

Web.XMl:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
  <display-name></display-name> 
  <welcome-file-list>
    <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>
    <servlet>
    <servlet-name>spring</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>spring</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <!-- 统一字符编码 -->
  <filter>
    <filter-name>encoding</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
        <param-name>encoding</param-name>
        <param-value>UTF-8</param-value>
    </init-param>
  </filter>

  <filter-mapping>
    <filter-name>encoding</filter-name>
    <url-pattern>*.do</url-pattern>
  </filter-mapping>
</web-app>