SSM整合

一 基本概念

• Spring
  Spring是一个开源框架，Spring是于2003 年兴起的一个轻量级的Java 开发框架，由Rod Johnson 在其著作Expert One-On-One J2EE Development and Design中阐述的部分理念和原型衍生而来。它是为了解决企业应用开发的复杂性而创建的。Spring使用基本的JavaBean来完成以前只可能由EJB完成的事情。然而，Spring的用途不仅限于服务器端的开发。从简单性、可测试性和松耦合的角度而言，任何Java应用都可以从Spring中受益。 简单来说，Spring是一个轻量级的控制反转（IoC）和面向切面（AOP）的容器框架。

• SpringMVC
  Spring MVC属于SpringFrameWork的后续产品，已经融合在Spring Web Flow里面。Spring MVC 分离了控制器、模型对象、分派器以及处理程序对象的角色，这种分离让它们更容易进行定制。

• MyBatis
  MyBatis 本是apache的一个开源项目iBatis, 2010年这个项目由apache software foundation 迁移到了google code，并且改名为MyBatis 。MyBatis是一个基于Java的持久层框架。iBATIS提供的持久层框架包括SQL Maps和Data Access Objects（DAO）MyBatis 消除了几乎所有的JDBC代码和参数的手工设置以及结果集的检索。MyBatis 使用简单的 XML或注解用于配置和原始映射，将接口和 Java 的POJOs（Plain Old Java Objects，普通的 Java对象）映射成数据库中的记录。

二 整合思路

2.0 项目目录结构

2.1 准备测试数据

CREATE TABLE `sys_user` (
  `id` int(36) NOT NULL AUTO_INCREMENT COMMENT '主键',
  `username` varchar(64) NOT NULL COMMENT '姓名',
  `password` varchar(32) NOT NULL COMMENT '密码',
  `salt` varchar(64) DEFAULT NULL COMMENT '盐',
  `locked` char(1) DEFAULT NULL COMMENT '账号是否锁定，1：锁定，0未锁定',
  `del` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

2.2 导入maven依赖

<!-- 集中定义依赖版本号 -->
	<properties>
		<junit.version>4.12</junit.version>
		<spring.version>4.3.8.RELEASE</spring.version>
		<mybatis.version>3.4.5</mybatis.version>
		<mybatis.spring.version>1.3.0</mybatis.spring.version>
		<mysql.version>5.1.38</mysql.version>
		<slf4j.version>1.6.4</slf4j.version>
		<jackson.version>2.9.7</jackson.version>
		<c3p0.version>0.9.5-pre10</c3p0.version>
		<jstl.version>1.2</jstl.version>
		<servlet-api.version>3.1.0</servlet-api.version>
		<jsp-api.version>2.2.1</jsp-api.version>
		<commons-lang3.version>3.3.2</commons-lang3.version>
		<commons-io.version>1.3.2</commons-io.version>
	</properties>

	<dependencies>
		<!-- 单元测试 -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>${junit.version}</version>
			<scope>test</scope>
		</dependency>

		<!-- Spring -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
			<version>${spring.version}</version>
		</dependency>

		<!-- Mybatis -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>${mybatis.version}</version>
		</dependency>
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>${mybatis.spring.version}</version>
		</dependency>

		<!-- 通用Mapper -->
		<dependency>
			<groupId>com.github.abel533</groupId>
			<artifactId>mapper</artifactId>
			<version>2.3.4</version>
		</dependency>

		<!-- MySql -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>${mysql.version}</version>
		</dependency>

		<dependency>
			<groupId>org.slf4j</groupId>
			<artifactId>slf4j-log4j12</artifactId>
			<version>${slf4j.version}</version>
		</dependency>

		<!-- Jackson Json处理工具包 -->
		<dependency>
			<groupId>com.fasterxml.jackson.core</groupId>
			<artifactId>jackson-databind</artifactId>
			<version>${jackson.version}</version>
		</dependency>

		<!-- c3p0数据源 -->
		<dependency>
			<groupId>com.mchange</groupId>
			<artifactId>c3p0</artifactId>
			<version>${c3p0.version}</version>
		</dependency>

		<!-- JSP相关 -->
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>${jstl.version}</version>
		</dependency>

		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>${servlet-api.version}</version>
			<scope>provided</scope>
		</dependency>

		<dependency>
			<groupId>javax.servlet.jsp</groupId>
			<artifactId>javax.servlet.jsp-api</artifactId>
			<version>${jsp-api.version}</version>
			<scope>provided</scope>
		</dependency>

		<!-- Apache工具组件 -->
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
			<version>${commons-lang3.version}</version>
		</dependency>
		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-io</artifactId>
			<version>${commons-io.version}</version>
		</dependency>

	</dependencies>

	<build>
		<plugins>
			<plugin>
				<artifactId>maven-war-plugin</artifactId>
				<configuration>
					<version>3.1</version>
				</configuration>
			</plugin>
			<!-- java编译插件 -->
			<plugin>
				<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-compiler-plugin</artifactId>
				<version>2.3.2</version>
				<configuration>
					<source>1.7</source>
					<target>1.7</target>
					<encoding>UTF-8</encoding>
				</configuration>
			</plugin>
		</plugins>
	</build>

2.3 配置数据库配置文件jdbc.properties

user=root
password=as501226107A.
driver=com.mysql.jdbc.Driver
url=jdbc:mysql:///didadb?useUnicode=true&characterEncoding=utf-8

2.4 新建applicationContext.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: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/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
   <!--加载配置文件-->
    <!--使用spring自带的占位符替换功能 -->
    <bean
            class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <!-- 忽略没有找到的资源文件 -->
        <property name="ignoreResourceNotFound" value="false" />
        <!-- 配置资源文件 -->
        <property name="locations">
            <list>
                <value>classpath:jdbc.properties</value>
            </list>
        </property>
    </bean>
    <!--扫描包-->
    <context:component-scan base-package="com.dream"/>
    <!--配置数据源-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${driver}"></property>
        <property name="jdbcUrl" value="${url}"></property>
        <property name="user" value="${user}"></property>
        <property name="password" value="${password}"></property>
    </bean>
    <!-- 配置sqlsession工厂 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <!--配置别名扫描地包-->
        <property name="typeAliasesPackage" value="com.dream.bean"></property>
        <!--配置扫描地mappper-->
        <property name="mapperLocations" value="classpath:com/dream/mapper/*.xml"></property>
    </bean>
    <!-- DAO接口所在包名，Spring会自动查找其下的类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.dream.mapper" />
    </bean>
    <!--配置事务管理器-->
    <bean id="dataSourceTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--开启事务驱动支持-->
    <tx:annotation-driven transaction-manager="dataSourceTransactionManager"/>
</beans>

2.5 新建日志文件log4j.propertie

log4j.rootLogger=INFO,Console,File  
#定义日志输出目的地为控制台  
log4j.appender.Console=org.apache.log4j.ConsoleAppender  
log4j.appender.Console.Target=System.out  
#可以灵活地指定日志输出格式，下面一行是指定具体的格式  
log4j.appender.Console.layout = org.apache.log4j.PatternLayout  
log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n  
  
#文件大小到达指定尺寸的时候产生一个新的文件  
log4j.appender.File = org.apache.log4j.RollingFileAppender  
#指定输出目录  
log4j.appender.File.File = logs/ssm.log  
#定义文件最大大小  
log4j.appender.File.MaxFileSize = 10MB  
# 输出所以日志，如果换成DEBUG表示输出DEBUG以上级别日志  
log4j.appender.File.Threshold = ALL  
log4j.appender.File.layout = org.apache.log4j.PatternLayout  
log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH\:mm\:ss}][%c]%m%n

2.6 新建实体类

package com.dream.bean;

public class User {
   private Integer id;
   private String  username;
   private String  password;
   private String  salt;
   private Integer locked;
   private Integer del;

    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;
    }

    public String getSalt() {
        return salt;
    }

    public void setSalt(String salt) {
        this.salt = salt;
    }

    public Integer getLocked() {
        return locked;
    }

    public void setLocked(Integer locked) {
        this.locked = locked;
    }

    public Integer getDel() {
        return del;
    }

    public void setDel(Integer del) {
        this.del = del;
    }
}

2.7 创建Mapper及映射文件

UserMapper.java

/**
 * 
 */
package com.dream.mapper;

import com.dream.bean.User;

/**
  *  Class Name: StudentMapper.java
  *  Description: 
  *  @author  dragon  DateTime 2018年11月6日 上午11:30:01 
  *  @company bvit 
  *  @email  [email protected] 
  *  @version 1.0
  */
public interface UserMapper {
	User login(User user);
}

UserMapper.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.dream.mapper.UserMapper">
  	<select id="login" resultType="User" parameterType="User">
  		select * from sys_user where username=#{username} and password=#{password} and del=0
  	</select>
  </mapper>

2.8 新建业务逻辑层

UserService.java

package com.dream.service;

import com.dream.bean.User;

public interface UserService {
    User login(User user);
}

UserServiceImpl.java

package com.dream.service.impl;

import com.dream.bean.User;
import com.dream.mapper.UserMapper;
import com.dream.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;


@Service
@Transactional
public class UserServiceImpl implements UserService {
    @Autowired
    private UserMapper userMapper;

    @Override
    public User login(User user) {
        return userMapper.login(user);
    }
}

2.9 创建控制层

package com.dream.controller;

import com.dream.bean.User;
import com.dream.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

@Controller
@Scope("prototype")
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService;
    @RequestMapping("/login")
    public void login(User user, HttpServletRequest request, HttpServletResponse response, HttpSession session) throws Exception{
        User login = userService.login(user);
        if(login!=null) {
            session.setAttribute("user",login);
            response.getWriter().write("<script>location.href='"+request.getContextPath()+"/index.jsp'</script>");;
        }else {
            response.getWriter().write("<script>alert('用户名或者密码错误');location.href='"+request.getContextPath()+"/login.jsp'</script>");;
        }
    }
}

2.10 配置springmvc.xml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:mvc="http://www.springframework.org/schema/mvc"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
	
">
	 <mvc:annotation-driven />


	<!-- 1.配置controller包的扫描 -->
	<context:component-scan base-package="com.dream.controller">
		<!-- 扫描注解为Controller的Bean -->
			<context:include-filter  type="annotation" expression="org.springframework.stereotype.Controller"/>
			<!-- 不扫描注解为ControllerAdvice的bean -->
			<context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"/>
	</context:component-scan>
	<!-- 2.配置视图解析器 -->
	<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/jsp/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>
	<!--multipartResolver配置 -->
<!-- 	<bean id="multipartResolver"
		class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<property name="defaultEncoding" value="UTF-8"/>
		<property name="maxUploadSize" value="5242880"/>
		<property name="uploadTempDir" value="file:/d:/temp"/>
	</bean> -->
    <!-- 配置静态资源处理方式1 -->
	<mvc:default-servlet-handler />
     <!-- 配置静态资源处理方式2 -->
	<mvc:resources mapping="/media/" location="/media/**"/>

	<!--配置拦截器-->
	<mvc:interceptors>
		<mvc:interceptor >
			<mvc:mapping path="/**"/>
			<bean  class="com.dream.intercepter.UnicodeIntercepter"></bean>
		</mvc:interceptor>
	</mvc:interceptors>
</beans>

2.11 配置 web.xml文件

<!-- 配置spring容器启动 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring-mybatis.xml</param-value>
  </context-param>
  <servlet>
    <servlet-name>springDispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>

  <!-- Map all requests to the DispatcherServlet for handling -->
  <servlet-mapping>
    <servlet-name>springDispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <!-- 配置POST乱码问题 -->
  <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>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
<!-- spring容器在项目启动时加载-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- 配置springmvc rest风格请求转换过滤器  -->
  <filter>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter
    </filter-class>
  </filter>
  <filter-mapping>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

2.12 测试项目

账号和密码分别为:admin 123

正确输入账号和密码，跳到首页

账户和密码错误的时候，弹出消息框，返回登录页

SSM demo测试成功!