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SSM(Spring + SpringMVC + Mybatis)框架整合并实现登录功能

2019-06-01 15:10 316 查看

前言

之前项目中需要用到SSM框架，所以本人在此整理一下整合的完整过程和细节，如有不对的地方请多多指教。

三大框架以及各层的作用

Spring框架：实现业务对象管理，最常见的便是ICO（控制反转）

SpringMVC框架：负责请求的转发和视图管理

Mybatis框架：作为数据对象的持久化引擎，主要是通过配置mapper.xml文件来直接给Dao接口提供对数据库进行操作的sql语句，使数据库底层操作变得更加透明

整合框架过程中还需要用到四个层：Dao层（数据访问层）、Service层（业务层）、Pojo层（实体层）、Controller层（控制层）

Dao层：主要作用是封装对数据库操作的方法（增删查改）

Service层：主要作用是封装具体的业务方法，然后在实现类中调用Dao层的方法来对数据进行操作

Pojo层：没啥好说的…个人理解就是对象实体

Controller层：主要作用是负责调用业务层的方法来实现具体的功能

环境搭建

开发工》具：eclipse
Tomcat：Tomcat 7
jdk: 1.8
接下来开始创建项目进行整合
File --> new --> Maven Project --> next --> 选择

–>next --> 输入自己的项目名称点击Finish，此时maven项目就创建好了

pom.xml

配置此文件导入三大框架整合所需要的所有依赖包

<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.nrt.ssm</groupId>
<artifactId>MySSM</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>MySSM Maven Webapp</name>
<url>http://maven.apache.org</url>
<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>
<!-- MyBatis依赖 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.3.0</version>
</dependency>
<!-- mybatis整合spring -->
<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>MySSM</finalName>
<plugins>
<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>

创建数据库表 user

pojo层（User）

package com.nrt.pojo;

public class User {
private int id;
private String username;
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return username;
}
public void setName(String username) {
this.username = username;
}
public String getPwd() {
return password;
}
public void setPwd(String password) {
this.password = password;
}
@Override
public String toString() {
return "User [id=" + id + ", username=" + username + ", password=" + password + "]";
}

}

dao层（UserDao）

package com.nrt.dao;

import com.nrt.pojo.User;

public interface UserDao {
/**
*
* 查找用户
*/
User findByUser(User user);
}

service层（UserService）

package com.nrt.service;

import com.nrt.pojo.User;

public interface UserService {
/*
* 登录验证
* */
User checkLogin(User user);
}

service层的实现层（UserServiceImpl）

package com.nrt.service.impl;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import com.nrt.dao.UserDao;
import com.nrt.pojo.User;
import com.nrt.service.UserService;

@Service("userService")
public class UserServiceImpl implements UserService{

@Resource
private UserDao userDao;

public User checkLogin(User user) {

User u = userDao.findByUser(user);

return u;
}
}

controller层（UserController）

package com.nrt.controller;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.SessionAttributes;

import com.nrt.pojo.User;
import com.nrt.service.UserService;

@Controller
@RequestMapping("/")
@SessionAttributes("username")
public class UserController {

@Resource(name = "userService")
private UserService userService;

//测试前台能否正常访问
@RequestMapping(value = "/toLogin")
public String toIndex() {
return "login";
}

//登录功能实现
@RequestMapping(value = "/checkLogin")
public String checkLogin(@RequestParam("username")String username,@RequestParam("password")String password,Model model) {
User user = new User();
user.setName(username);
user.setPwd(password);
if(userService.checkLogin(user) != null) {
model.addAttribute("username",username);
return "homePage";
}else {
return "fail";
}
}

配置web.xml文件

<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">

<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>

<servlet>
<servlet-name>MySSM</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>MySSM</servlet-name>
<!-- 默认匹配所有的请求 -->
<url-pattern>/</url-pattern>
</servlet-mapping>
<display-name>Archetype Created Web Application</display-name>
</web-app>

Spring整合Mybatis（spring-dao.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: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">
<!-- 配置数据库连接的参数 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<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>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<property name="typeAliasesPackage" value="com.nrt.pojo"></property>
<property name="mapperLocations" value="classpath:mapper/*.xml"></property>
</bean>

<!-- 自动扫描dao包下的接口注入到spring容器中 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
<property name="basePackage" value="com.nrt.dao"></property>
</bean>
</beans>

Spring整合SpringMVC（spring-web.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: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
">

<mvc:annotation-driven/>

<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>

<context:component-scan base-package="com.nrt.controller" />

<!-- 注意：不加这个配置，前台的jsp页面将无法使用css，js等静态文件-->
<mvc:default-servlet-handler/>
<mvc:resources location="/WEB-INF/js/" mapping="/js/**"/>
<mvc:resources location="/WEB-INF/css/" mapping="/css/**"/>
<mvc:resources location="/WEB-INF/fonts/" mapping="/fonts/**"/>
</beans>

Spring配置事务管理（spring-service.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: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">

<context:component-scan base-package="com.nrt.service" />

<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>

<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

mybatis的配置文件（mybatis-config.xml）

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<!-- 设置主键自增 -->
<setting name="useGeneratedKeys" value="true"/>
<setting name="useColumnLabel" value="true"/>
<!-- 驼峰名转换 -->
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
</configuration>

jdbc.properties

jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=各位的数据库密码

UserDao接口的映射文件（UserDaoMapper.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.nrt.dao.UserDao">
<select id="findById" resultType="User" parameterType="User">
select * from user where username = #{username}
</select>
</mapper>

前台jsp页面（bootstrap框架搭建）

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录界面</title>
<link rel="stylesheet" href="${pageContext.request.contextPath}/css/bootstrap.min.css">
</head>
<body>
<div style="padding: 100px 100px 10px;text-align: center;">
<form action="checkLogin.do" method="post" class="bs-example bs-example-form" role="form">
<div class="input-group input-group-lg container" style="width: 500px;">
<span class="input-group-addon glyphicon glyphicon-user"></span>
<input name="username" type="text" class="form-control" placeholder="请输入用户名">
</div><br>
<div class="input-group input-group-lg container" style="width: 500px;">
<span class="input-group-addon glyphicon glyphicon-lock"></span>
<input name="password" type="password" class="form-control" placeholder="请输入密码">
</div><br>
<div style="text-align: center;">
<button type="submit"style="width: 80px;text-align: center;">登录</button>
</div>
</form>
</div>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery-3.2.1.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/bootstrap.min.js"></script>
</body>
</html>

homePage.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>首页</title>
<meta name="viewport" content="width=device-width, initial-scale=1">

<link rel="stylesheet" href="${pageContext.request.contextPath}/css/bootstrap.min.css">
<script type="text/javascript" src="${pageContext.request.contextPath}/js/jquery.min.js"></script>
<script type="text/javascript" src="${pageContext.request.contextPath}/js/bootstrap.min.js"></script>

<style type="text/css">
body {
padding-top: 50px;
padding-left: 50px;
}
</style>
</head>
<body>

<div class="navbar navbar-fixed-top navbar-inverse" role="navigation">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">晶天美食</a>
</div>
<div class="collapse navbar-collapse">
<ul class="nav navbar-nav">
<li class="active"><a href="toHomePage.do"><span class="glyphicon glyphicon-home"></span> 首页</a></li>
<li><a href="toShoppingCart.do"><span class="glyphicon glyphicon-shopping-cart"></span> 购物车</a></li>
<li><a href="#support"><span class="glyphicon glyphicon-headphones"></span> Support</a></li>
</ul>
<a><span class="glyphicon glyphicon-user" style="position: absolute;right: 100px;top: 15px;color: white;">&nbsp;${username }</span></a>
<a href="loginOut.do"><span class="glyphicon glyphicon-off" style="position: absolute;right: 30px;top: 15px;color: white;">退出</span></a>
</div>
</div>
</div>
<div>
</div>
</body>
</html>

fail.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
失败啦！！！
</body>
</html>

效果

到这里SSM框架的整合基本算是完成了，可以在后续的代码中添加自己想要实现的功能。

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