ssm整合的登录

新建一个web工程，主要结构如下：

数据库创建如下：

控制层的代码FormController 类

package codeRose.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

//动态页面跳转控制器
@Controller
public class FormController {
    @RequestMapping(value="/{formName}")
    public String loginForm(@PathVariable String formName){
        return formName;
    }

}

　　控制层UserController 主要注意view.setViewName("success");的跳转。

package codeRose.controller;

import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.view.RedirectView;

import codeRose.domain.User;
import codeRose.service.UserService;

@Controller
public class UserController {
    @Autowired
    @Qualifier("userService")
    private UserService userService;
    /**
     * 处理/login请求
     */
    @RequestMapping(value="/login")
    public ModelAndView login(String loginname,String password){
        User user=userService.login(loginname, password);
        ModelAndView view= new ModelAndView();
        if(user!=null){
            //登录成功，将user对象设置到HttpSession作用范围域中
            //session.setAttribute("user", user);
            //转发到main请求
            //mv.setView(new RedirectView("/content/main.jsp"));
        	view.setViewName("success");
        }else {
            //登录失败，设置失败信息，并调转到登录页面

            //mv.addObject("message","登录名和密码错误，请重新输入");
           // mv.setViewName("loginForm");
        	view.setViewName("login");
        }
        return view;
    }
}

　　dao层，实体类 User类

package codeRose.domain;

public class User {

	/**
	 * 实体层，存放实体类
	 */
	    private Integer id;
	    private String loginname;
	    private String password;
	    private String username;
		public Integer getId() {
			return id;
		}
		public void setId(Integer id) {
			this.id = id;
		}
		public String getLoginname() {
			return loginname;
		}
		public void setLoginname(String loginname) {
			this.loginname = loginname;
		}
		public String getPassword() {
			return password;
		}
		public void setPassword(String password) {
			this.password = password;
		}
		public String getUsername() {
			return username;
		}
		public void setUsername(String username) {
			this.username = username;
		}
		@Override
		public String toString() {
			return "User [id=" + id + ", loginname=" + loginname
					+ ", password=" + password + ", username=" + username + "]";
		}

}

　　持久层UserMapper

package codeRose.mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;

import codeRose.domain.User;
//持久层包括数据库表映射的User.java的JavaBean对象，并使用了MyBatis的注解映射了对应的SQL语句

public interface UserMapper {

	@Select("select * from user where loginname=#{loginname} and password=#{password}")
    User findWithLoginAndPassword(@Param("loginname")String loginname,@Param("password")String password);

}

　　service层   UserService类 跟 UserServiceImpl 类

package codeRose.service;

import codeRose.domain.User;

public interface UserService {

	/**
     * 判断用户登录
     * @param String loginname
     * @param String password
     * @return 找到返回User对象，没有找到返回null
     * */
    User login(String loginname,String password);
}

package codeRose.service;

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

import codeRose.domain.User;
import codeRose.mapper.UserMapper;
@Service("userService")
public class UserServiceImpl implements UserService{
@Autowired
private UserMapper userMapper;

@Override
public User login(String loginname, String password) {

return userMapper.findWithLoginAndPassword(loginname, password);
}

}　

数据库的db.properties

dataSource.driverClass=com.mysql.jdbc.Driver
dataSource.jdbcUrl=jdbc:mysql://localhost:3306/smm
dataSource.user=root
dataSource.password=
dataSource.maxPoolSize=20
dataSource.maxIdleTime = 1000
dataSource.minPoolSize=6
dataSource.initialPoolSize=5

主要的xml配置

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:mybatis="http://mybatis.org/schema/mybatis-spring"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
                        http://www.springframework.org/schema/context
                        http://www.springframework.org/schema/context/spring-context-4.2.xsd
                        http://www.springframework.org/schema/mvc
                        http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
                        http://www.springframework.org/schema/tx
                        http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
                        http://mybatis.org/schema/mybatis-spring
                        http://mybatis.org/schema/mybatis-spring.xsd ">

     <!-- mybatis:scan会将codeRose.mapper包里的所有接口当作mapper配置，之后可以自动引入mapper类-->
    <mybatis:scan base-package="codeRose.mapper"/>   

     <!-- 扫描codeRose包下面的java文件，有Spring的相关注解的类，则把这些类注册为Spring的bean -->
    <context:component-scan base-package="codeRose"/>

    <!-- 使用PropertyOverrideConfigurer后处理器加载数据源参数 -->
    <context:property-override location="classpath:db.properties"/>

    <!-- 配置c3p0数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"/>

    <!-- 配置SqlSessionFactory，org.mybatis.spring.SqlSessionFactoryBean是Mybatis社区开发用于整合Spring的bean -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"
        p:dataSource-ref="dataSource"/>

    <!-- JDBC事务管理器 -->
    <bean id="transactionManager"
    class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
         p:dataSource-ref="dataSource"/>

    <!-- 启用支持annotation注解方式事务管理 -->
    <tx:annotation-driven transaction-manager="transactionManager"/>

</beans>

　　springmvc-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.2.xsd">

    <!-- 自动扫描该包，SpringMVC会将包下用了@controller注解的类注册为Spring的controller -->
    <context:component-scan base-package="codeRose.controller"/>
    <!-- 设置默认配置方案 -->
    <mvc:annotation-driven/>
    <!-- 使用默认的Servlet来响应静态文件 -->
    <mvc:default-servlet-handler/>
    <!-- 视图解析器  -->
     <bean id="viewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 前缀 -->
         <!-- 前缀 -->
        <property name="prefix">
            <value>/WEB-INF/view/</value>
        </property>
        <!-- 后缀 -->
        <property name="suffix">
            <value>.jsp</value>
        </property>
    </bean>

</beans>

web.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
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_2_5.xsd">

<!-- 配置spring核心监听器，默认会以 /WEB-INF/applicationContext.xml作为配置文件 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- contextConfigLocation参数用来指定Spring的配置文件 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>

<!-- 定义Spring MVC的前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/springmvc-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>

<!-- 让Spring MVC的前端控制器拦截所有请求 -->
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

<!-- 编码过滤器 -->
<filter>
<filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

</web-app>

主要的HTML页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
    <form action="login" method="post">
        <label>账号：</label>
        <input type="text" id="txtUsername" name="loginname" placeholder="请输入账号" /><br/>
        <label>密码：</label>
        <input type="password" id="txtPassword" name="password" placeholder="请输入密码" /><br/>
        <input type="submit" value="提交" />
        <input type="reset" value="重置" />
    </form>
</body>
</html>