SSM搭建(整合)+用户模块(登录和注销)实现

SSM框架的搭建环境(Spring,SpringMVC,Mybatis)

　　本文使用的是maven来构建的环境，开发工具是eclipse，tomcat用的是8，jdk版本1.8

用户模块流程

　　pom.xml -> web.xml -> entity (此处是User，与数据库中的字段名相同) -> UserDao -> UserDao.xml(这里是用的mybatis映射，直接动态实现dao接口的实现类) -> UserService -> UserServiceImpl -> UserController,这就是一个大体流程，下面开始详细介绍模块完成。路径图如下：

Maven中pom.xml文件

　　此处在pom.xml文件里每一块都有注释，已经解释的很清楚了，就不多说了。

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">    <modelVersion>4.0.0</modelVersion>    <groupId>com.imooc</groupId>    <artifactId>userLogin</artifactId>    <version>0.0.1-SNAPSHOT</version>    <packaging>war</packaging>    <dependencies>        <dependency>            <!-- 使用junit4 用注解方式 -->            <groupId>junit</groupId>            <artifactId>junit</artifactId>            <version>4.11</version>            <scope>test</scope>        </dependency>        <!-- 补全项目依赖 -->        <!-- 1：日志 java日志：slf4j，log4j，logback，common-logging slf4j 是规范/接口 日志实现:log4j,logback,common-logging             使用：slf4j + logback -->        <dependency>            <groupId>org.slf4j</groupId>            <artifactId>slf4j-api</artifactId>            <version>1.7.12</version>        </dependency>        <dependency>            <groupId>ch.qos.logback</groupId>            <artifactId>logback-core</artifactId>            <version>1.1.1</version>        </dependency>        <!-- 实现slf4j接口并整合 -->        <dependency>            <groupId>ch.qos.logback</groupId>            <artifactId>logback-classic</artifactId>            <version>1.1.1</version>        </dependency>        <!-- 2：数据库相关依赖 -->        <dependency>            <groupId>mysql</groupId>            <artifactId>mysql-connector-java</artifactId>            <version>5.1.35</version>            <scope>runtime</scope>        </dependency>        <dependency>            <groupId>c3p0</groupId>            <artifactId>c3p0</artifactId>            <version>0.9.1.2</version>        </dependency>        <!-- DAO框架：MyBatis依赖 -->        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis</artifactId>            <version>3.3.0</version>        </dependency>        <!-- mybatis自身实现的spring整合依赖 -->        <dependency>            <groupId>org.mybatis</groupId>            <artifactId>mybatis-spring</artifactId>            <version>1.2.3</version>        </dependency>        <!--:3：servlet web相关依赖 -->        <dependency>            <groupId>taglibs</groupId>            <artifactId>standard</artifactId>            <version>1.1.2</version>        </dependency>        <dependency>            <groupId>jstl</groupId>            <artifactId>jstl</artifactId>            <version>1.2</version>        </dependency>        <dependency>            <groupId>com.fasterxml.jackson.core</groupId>            <artifactId>jackson-databind</artifactId>            <version>2.5.4</version>        </dependency>        <dependency>            <groupId>javax.servlet</groupId>            <artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>        </dependency>        <!-- 4：spring依赖 -->        <!-- 1)spring核心依赖 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-core</artifactId>            <version>4.2.0.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-beans</artifactId>            <version>4.2.0.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-context</artifactId>            <version>4.2.0.RELEASE</version>        </dependency>        <!-- 2)spring dao层依赖 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-jdbc</artifactId>            <version>4.2.0.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-tx</artifactId>            <version>4.2.0.RELEASE</version>        </dependency>        <!-- 3)spring web相关依赖 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-web</artifactId>            <version>4.2.0.RELEASE</version>        </dependency>        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-webmvc</artifactId>            <version>4.2.0.RELEASE</version>        </dependency>        <!-- 4)spring test相关依赖 -->        <dependency>            <groupId>org.springframework</groupId>            <artifactId>spring-test</artifactId>            <version>4.2.0.RELEASE</version>        </dependency>    </dependencies>    <build>        <finalName>userLogin</finalName>        <plugins>            <!-- define the project compile level -->            <!-- maven编译用的版本控制，控制jdk的版本不会回跳 -->            <plugin>                <groupId>org.apache.maven.plugins</groupId>                <artifactId>maven-compiler-plugin</artifactId>                <version>2.3.2</version>                <configuration>                    <source>1.8</source>                    <target>1.8</target>                </configuration>            </plugin>        </plugins>    </build></project>

配置web.xml

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee                      http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"  version="3.1"  metadata-complete="true" >    <!-- 修改servlet版本为3.1 -->    <!-- 解决post的乱码 -->    <filter>        <filter-name>CharacterEncodingFilter</filter-name>        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>        <!-- 初始化参数，设置编码为utf-8 -->        <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>    <!-- 配置DispatcherServlet -->    <servlet>        <servlet-name>userLogin</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <!-- 配置springMVC需要加载的配置文件            spring-dao.xml,spring-service.xml,spring-web.xml            Mybatis -> spring  -> springMVC         -->        <init-param>            <param-name>contextConfigLocation</param-name>            <param-value>classpath:spring/spring-*.xml</param-value>        </init-param>        <load-on-startup>1</load-on-startup>    </servlet>    <servlet-mapping>        <servlet-name>userLogin</servlet-name>         <!-- 默认匹配所有的请求 -->          <url-pattern>/</url-pattern>    </servlet-mapping>  </web-app>

数据库与实体类(entity)

　　创建数据库，创建一张表，里面有id,username,password这三个属性,同时顺便给上值后面做测试好用，如下图所示：

　　创建实体类(entity)：

package com.sy.entity;public class User {    private String id;    private String username;    private String password;    public String getId() {        return id;    }    public void setId(String id) {        this.id = id;    }    .......

创建Dao层(UserDao)同时配置映射文件(UserDao.xml)

public interface UserDao {    /**     * 查找用户名和密码     * @param username 登录用户名      * @param password 密码     * @return     */    User findByUsername(String username);}

Mybatis对应的映射文件(UserDao.xml):

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE mapper    PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"    "http://mybatis.org/dtd/mybatis-3-mapper.dtd"><mapper namespace="com.sy.dao.UserDao">    <!-- 目的：为DAO接口方法提供sql语句配置 -->    <!-- 查询用户和密码进行登录 -->    <select id="findByUsername" resultType="User" parameterType="String">        select * from user where username = #{username}    </select></mapper>

Spring整合UserDao(Mybaits)的配置文件

spring-dao.xml,注释写的很详细，每个配置都是做什么的，大家可以仔细看一下。

<?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:context="http://www.springframework.org/schema/context"        xmlns:aop="http://www.springframework.org/schema/aop"        xmlns:tx="http://www.springframework.org/schema/tx"        xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context.xsd        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop.xsd        http://www.springframework.org/schema/tx        http://www.springframework.org/schema/tx/spring-tx.xsd">    <!-- 配置整合mybatis过程 -->    <!-- 1:配置数据库相关参数 properties的属性:${url}-->    <context:property-placeholder location="classpath:jdbc.properties"/>    <!-- 2:数据库连接池 -->    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">        <!-- 配置连接池属性 -->        <property name="driverClass" value="${jdbc.driverClass}"></property>        <property name="jdbcUrl" value="${jdbc.url}"></property>        <property name="user" value="${jdbc.username}"></property>        <property name="password" value="${jdbc.password}"></property>        <!-- c3p0连接池的私有属性 -->        <property name="maxPoolSize" value="30"></property>        <property name="minPoolSize" value="10"></property>        <!-- 关闭连接后不自动commit -->        <property name="autoCommitOnClose" value="false"></property>        <!-- 获取连接超时时间 -->        <property name="checkoutTimeout" value="1000"></property>        <!-- 当获取连接失败重试次数 -->        <property name="acquireRetryAttempts" value="2"></property>    </bean>    <!-- 约定大于配置 -->    <!-- 3:配置sqlsessionfactory对象 -->    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <!-- 注入数据库连接池 -->        <property name="dataSource" ref="dataSource"></property>        <!-- 配置mybatis全局配置文件:mybatis-config.xml -->        <property name="configLocation" value="classpath:mybatis-config.xml"></property>        <!-- 扫描entity包 使用别名 com.sy.entity.User ->User -->        <property name="typeAliasesPackage" value="com.sy.entity"></property>        <!-- 扫描sql配置文件：mapping需要的xml文件 -->        <property name="mapperLocations" value="classpath:mapper/*.xml"></property>    </bean>    <!-- 4：配置扫描Dao接口的包，动态实现Dao接口，注入到Spring容器中 -->    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <!-- 注入sqlsessionfactory -->        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>        <!-- 给出需要扫描的Dao接口包 -->        <property name="basePackage" value="com.sy.dao"></property>    </bean></beans>

UserService层接口及实现类的写法

//Service层接口public interface UserService {    //检验用户登录    User checkLogin(String username,String password);}

@Servicepublic class UserServiceImpl implements UserService{    @Autowired    private UserDao userDao;    /*      * 检验用户登录业务     *      */    public User checkLogin(String username, String password) {        User user = userDao.findByUsername(username);        if(user != null && user.getPassword().equals(password)){            return user;        }        return null;    }}

Spring整合Service层配置文件

　　当然这里我们没有用到事务，但是为了符合题目，SSM的整合，以后也是会用到事务的，可以如下配置一下

<?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:context="http://www.springframework.org/schema/context"        xmlns:aop="http://www.springframework.org/schema/aop"        xmlns:tx="http://www.springframework.org/schema/tx"        xsi:schemaLocation="http://www.springframework.org/schema/beans        http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context.xsd        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop.xsd        http://www.springframework.org/schema/tx        http://www.springframework.org/schema/tx/spring-tx.xsd">    <!-- 扫描service包下所有使用注解的类型 -->    <context:component-scan base-package="com.sy.service"/>    <!-- 配置事务管理器 -->    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <!-- 注入数据库的连接池 -->        <property name="dataSource" ref="dataSource"/>    </bean>    <!-- 配置基于注解的声明式事务        默认使用注解来管理事务行为     -->    <tx:annotation-driven transaction-manager="transactionManager"/></beans>

Web(UserController)层的实现(SpringMVC)

每一个层级的方法我都写在注释中了

@Controller@RequestMapping("/user")//这里用了@SessionAttributes，可以直接把model中的user(也就key)放入其中//这样保证了session中存在user这个对象@SessionAttributes("user")public class UserController {    @Autowired    private UserService userServivce;    //正常访问login页面    @RequestMapping("/login")    public String login(){        return "login";    }    //表单提交过来的路径    @RequestMapping("/checkLogin")    public String checkLogin(User user,Model model){        //调用service方法        user = userServivce.checkLogin(user.getUsername(), user.getPassword());        //若有user则添加到model里并且跳转到成功页面        if(user != null){            model.addAttribute("user",user);            return "success";        }        return "fail";    }    //测试超链接跳转到另一个页面是否可以取到session值    @RequestMapping("/anotherpage")    public String hrefpage(){        return "anotherpage";    }    //注销方法    @RequestMapping("/outLogin")    public String outLogin(HttpSession session){        //通过session.invalidata()方法来注销当前的session        session.invalidate();        return "login";    }}

Spring整合Controller层的配置文件

<?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:context="http://www.springframework.org/schema/context"        xmlns:aop="http://www.springframework.org/schema/aop"        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.xsd        http://www.springframework.org/schema/context        http://www.springframework.org/schema/context/spring-context.xsd        http://www.springframework.org/schema/aop        http://www.springframework.org/schema/aop/spring-aop.xsd        http://www.springframework.org/schema/tx        http://www.springframework.org/schema/tx/spring-tx.xsd        http://www.springframework.org/schema/mvc         http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd        ">    <!-- 配置springMVC -->    <!-- 1：开启springMVC注解模式 -->    <!-- 简化配置：         (1)自动注册DefaultAnnotationHandlerMapping，AnnotationMethodHandlerAdapter         (2)提供一系列：数据绑定，数字和日期的format  @NumberFormat,@DataTimeFormat        xml,json默认读写支持     -->    <mvc:annotation-driven/>    <!-- 2：配置jsp显示ViewResolver -->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>        <property name="prefix" value="/WEB-INF/jsp/" />        <property name="suffix" value=".jsp" />    </bean>    <!-- 3：扫描web相关的bean -->    <context:component-scan base-package="com.sy.controller" /></beans>

JSP的写法

login.jsp

<%@ 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="/userLogin/user/checkLogin" method="post">        <table>            <tr>                <td>用户名:</td>                <td><input id="username" name="username" type="text"></td>            </tr>            <tr>                <td>密码:</td>                <td><input id="password" name="password" type="password"></td>            </tr>            <tr>                <td><input type="submit" value="登录"></td>            </tr>        </table>    </form></body></html>

success.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%><!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>    <div>        <strong> welcome,${sessionScope.user.username}! </strong>    </div>    this is success page!    <a href="/userLogin/user/anotherpage">点我跳到另一个页面</a>    <form action="/userLogin/user/outLogin">        <table>            <tr>                <td><input type="submit" value="退出登录"></td>            </tr>        </table>    </form></body></html>

fail.jsp:

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"    pageEncoding="ISO-8859-1"%><!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=ISO-8859-1"><title>Insert title here</title></head><body>        u are loser,this is a fail page!</body></html>

anotherpage.jsp:

<%@ 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>    <div>        <strong> ${sessionScope.user.username}!!!!! </strong>    </div>    <form action="/userLogin/user/outLogin">        <table>            <tr>                <td><input type="submit" value="退出登录" ></td>            </tr>        </table>    </form></body></html>

Demo效果图

Demo路径

我已经把这个demo传到我的github上了，需要的同学可以参考下，能star就star，希望不要fork，谢谢谢！~地址如下：

https://github.com/unlimitbladeworks/SSM-UerLogin

完