SSM三大框架整合

1、搭建整合环境

　　SSM整合有多种方式，这里选择XML + 注解的方式，SSM三大框架使用版本：spring-webmvc5.0.2、spring5.0.2、mybatis3.4.5

　　1.创建数据库和表结构

create database ssm;
use ssm;
create table account(
　　id int primary key auto_increment,
　　name varchar(20),
　　money double(20,2)
);

　　2.创建maven工程，定义pom.xml文件

　　　　设置编译插件和Tomcat插件：

<properties>
　　<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
　　<maven.compiler.source>1.8maven.compiler.source>
　　<maven.compiler.target>1.8maven.compiler.target>
properties>

<plugin>
  <groupId>org.apache.maven.pluginsgroupId>
  <artifactId>maven-compiler-pluginartifactId>
  <version>3.1version >
  <configuration>
    <source>${maven.compiler.source}source>
    <target>${maven.compiler.target}target>
    <encoding>${project.build.sourceEncoding}encoding>
  configuration>
plugin>

<plugin>
  <groupId>org.apache.tomcat.mavengroupId>
  <artifactId>tomcat7-maven-pluginartifactId>
  <version>2.2version>
  <configuration>
  <path>/path>
  <port>8080port>
configuration>
plugin>

　　　　锁定依赖版本：

<properties>
　　<spring.version>5.0.2.RELEASEspring.version>
　　<springmvc.version>5.0.2.RELEASEspringmvc.version>
　　<mybatis.version>3.4.5mybatis.version>
properties>

  
  <dependencyManagement>
    <dependencies>
      
      <dependency>
        <groupId>org.mybatisgroupId>
        <artifactId>mybatisartifactId>
        <version>${mybatis.version}version>
      dependency>
      
      <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-webmvcartifactId>
        <version>${springmvc.version}version>
      dependency>
      
      <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-contextartifactId>
        <version>${spring.version}version>
      dependency>
      <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-coreartifactId>
        <version>${spring.version}version>
      dependency>
      <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-aopartifactId>
        <version>${spring.version}version>
      dependency>
      <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-webartifactId>
        <version>${spring.version}version>
      dependency>
      <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-expressionartifactId>
        <version>${spring.version}version>
      dependency>
      <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-beansartifactId>
        <version>${spring.version}version>
      dependency>
      <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-aspectsartifactId>
        <version>${spring.version}version>
      dependency>
      <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-context-supportartifactId>
        <version>${spring.version}version>
      dependency>
      <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-testartifactId>
        <version>${spring.version}version>
        <scope>testscope>
      dependency>
      <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-jdbcartifactId>
        <version>${spring.version}version>
      dependency>
      <dependency>
        <groupId>org.springframeworkgroupId>
        <artifactId>spring-txartifactId>
        <version>${spring.version}version>
      dependency>
    dependencies>
  dependencyManagement>

　　　　添加依赖：

  <dependencies>
    
    <dependency>
      <groupId>org.mybatisgroupId>
      <artifactId>mybatisartifactId>
    dependency>
    <dependency>
      <groupId>org.mybatisgroupId>
      <artifactId>mybatis-springartifactId>
      <version>1.3.1version>
    dependency>
    
    <dependency>
      <groupId>mysqlgroupId>
      <artifactId>mysql-connector-javaartifactId>
      <version>5.1.32version>
    dependency>
    
    <dependency>
      <groupId>com.alibabagroupId>
      <artifactId>druidartifactId>
      <version>1.0.9version>
    dependency>
    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-webmvcartifactId>
    dependency>
    
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-contextartifactId>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-coreartifactId>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-aopartifactId>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-webartifactId>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-expressionartifactId>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-beansartifactId>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-aspectsartifactId>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-context-supportartifactId>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-testartifactId>
      <scope>testscope>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-jdbcartifactId>
    dependency>
    <dependency>
      <groupId>org.springframeworkgroupId>
      <artifactId>spring-txartifactId>
    dependency>
    
    <dependency>
      <groupId>junitgroupId>
      <artifactId>junitartifactId>
      <version>4.12version>
      <scope>testscope>
    dependency>
    
    <dependency>
      <groupId>javax.servletgroupId>
      <artifactId>servlet-apiartifactId>
      <version>2.5version>
      <scope>providedscope>
    dependency>
    
    <dependency>
      <groupId>javax.servletgroupId>
      <artifactId>jsp-apiartifactId>
      <version>2.0version>
      <scope>providedscope>
    dependency>
    
    <dependency>
      <groupId>javax.servletgroupId>
      <artifactId>jstlartifactId>
      <version>1.2version>
    dependency>
  dependencies>

　　3.持久层（如果使用注解方式开发，则只需要在接口方法上添加相应的注解，删除 mapper 映射文件，其他配置都不需要变）

　　　　定义实体类：

/**
 * 账户实体类
 */
public class Account {
    private Integer id;
    private String name;
    private Double money;
    // get 和 set 方法
}

　　　　dao 代码：

/**
 * 账户持久层接口
 */
public interface AccountDao {
    /**
     * 根据id查询账户信息
     * @param id
     * @return
     */
    Account findById(Integer id);
}

　　　　配置文件：在 src/main/resources 下创建

　　　　　　使用xml开发，映射文件：AccountDao.xml

　　　　　　要求名称和 dao 接口名一样，后面配置的 mapper 扫描器以此规则来扫描（放置在和dao接口相同的包路径下，方便管理）

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.fgy.ssm.dao.AccountDao">
    <select id="findById" parameterType="int" resultType="account">
        select * from account where id = #{id}
    select>
mapper>

　　　　　　创建 spring 配置文件：applicationContext.xml，把原本属于 mybatis 的配置文件内容交给 spring 来管理

xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       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:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context-4.0.xsd
            http://www.springframework.org/schema/aop
            http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
            http://www.springframework.org/schema/tx
            http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">

    
    
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        
        <property name="url" value="jdbc:mysql://localhost:3306/ssm" />
        
        <property name="username" value="root" />
        
        <property name="password" value="root" />
    bean>

    
    
    <bean id="sqlSessionFactory"
          class="org.mybatis.spring.SqlSessionFactoryBean">
        
        <property name="dataSource" ref="dataSource" />
        
        <property name="typeAliasesPackage" value="com.fgy.ssm.domain">property>
    bean>
    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        
        <property name="basePackage" value="com.fgy.ssm.dao">property>
    bean>
    

    
    
beans>

　　　　　　添加日志文件 log4j.properties

　　　　　　.......................................

　　　　测试持久层：

public class AccountDaoTest {
    @Test
    public void testFindById() {
        ApplicationContext context = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        AccountDao accountDao = context.getBean(AccountDao.class);
        Account account = accountDao.findById(1);
        System.out.println(account);
    }
}

　　　　　　也可以使用 spring 整合 junit 来测试，坐标在最开始时已经导入

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class AccountDaoTest {
    @Autowired
    private AccountDao accountDao;

    @Test
    public void testFindById() {
        Account account = accountDao.findById(1);
        System.out.println(account);
    }
}

　　4.业务层

　　　　dao 新增的方法：这里使用注解，不再使用 xml

/**
     * 根据名称查询账户信息
     * @param name
     * @return
     */
    @Select("select * from account where name = #{name}")
    Account findByName(String name);

    /**
     * 更新账户信息
     * @param account1
     */
    @Select("update account set name = #{name}, money = #{money} where id = #{id}")
    void update(Account account1);

　　　　service 代码：

/**
 * 账户业务层接口
 */
public interface AccountService {

    /**
     * 根据id查询账户信息
     * @param id
     * @return
     */
    Account findById(Integer id);

    /**
     * 用户1向用户2转账
     * @param user1
     * @param user2
     * @param money
     */
    void transfer(String user1, String user2, Double money);
}

/**
 * 账户业务层实现类
 */
@Service("accountService")
public class AccountServiceImpl implements AccountService {

    @Autowired
    private AccountDao accountDao;

    /**
     * 根据id查询账户信息
     * @param id
     * @return
     */
    @Override
    public Account findById(Integer id) {
        return accountDao.findById(id);
    }

    /**
     * 用户1向用户2转账
     * @param user1
     * @param user2
     * @param money
     */
    @Override
    public void transfer(String user1, String user2, Double money) {
        // 查询用户1
        Account account1 = accountDao.findByName(user1);
        // 查询用户2
        Account account2 = accountDao.findByName(user2);
        // 转账
        account1.setMoney(account1.getMoney() - money);
        account2.setMoney(account2.getMoney() + money);
        // 更新用户1
        accountDao.update(account1);

        // int i = 1/0;

        // 更新用户2
        accountDao.update(account2);
    }
}

　　　　配置文件：在 applicationContext.xml 中添加

    
    <context:component-scan base-package="com.fgy.ssm.service.impl"/>

    
    
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        
        <property name="dataSource" ref="dataSource">property>
    bean>
    
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="find*" read-only="true" propagation="SUPPORTS"/>
            <tx:method name="*" read-only="false" propagation="REQUIRED"/>
        tx:attributes>
    tx:advice>
    
    <aop:config>
        
        <aop:pointcut id="pt" expression="execution(* com.fgy.ssm.service.impl.*.*(..))"/>
        
        <aop:advisor advice-ref="txAdvice" pointcut-ref="pt">aop:advisor>
    aop:config>
    

　　　　测试业务层：

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class AccountServiceTest {

    @Autowired
    private AccountService accountService;

    @Test
    public void testTransfer() {
        accountService.transfer("张三", "李四", 100.0);
    }
}

　　表现层：

　　　　controller 代码：

/**
 * 账户表现层
 */
@Controller
@RequestMapping("/account")
public class AccountController {

    @Autowired
    private AccountService accountService;

    /**
     * 查询账户详情
     * @param model
     * @param id
     * @return
     */
    @RequestMapping("/findDetail/{id}")
    public String findDetail(Model model, @PathVariable(name = "id") Integer id) {
        Account account = accountService.findById(id);
        model.addAttribute("account", account);
        return "detail";
    }

    /**
     * 测试转账
     * @return
     */
    @RequestMapping("/transfer")
    public String transfer() {
        accountService.transfer("张三", "李四", 100.0);
        return "success";
    }
}

　　　　新建 springmvc.xml 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:mvc="http://www.springframework.org/schema/mvc"
       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">

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

    
    <mvc:annotation-driven/>

    
    <mvc:default-servlet-handler/>

    
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    bean>
beans>

　　　　index.jsp 页面和 detail.jsp页面：

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
    <title>indextitle>
head>
<body>
    <a href="${pageContext.request.contextPath}/account/findDetail/1">查询详情a> <br/>
    <a href="${pageContext.request.contextPath}/account/transfer">测试事务是否正常a>
body>
html>

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
    <title>detailtitle>
head>
<body>
    id：${account.id} <br/>
    name：${account.name} <br/>
    money：${account.money} <br/>
    <img src="${pageContext.request.contextPath}/images/test.jpg">测试静态文件是否放行
body>
html>

　　　　配置 web.xml 文件：

DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
            http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">

    
    <filter>
        <filter-name>characterEncodingFilterfilter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
        
        <init-param>
            <param-name>encodingparam-name>
            <param-value>UTF-8param-value>
        init-param>
        
        <init-param>
            <param-name>forceEncodingparam-name>
            <param-value>falseparam-value>
        init-param>
    filter>
    <filter-mapping>
        <filter-name>characterEncodingFilterfilter-name>
        <url-pattern>/*url-pattern>
    filter-mapping>

    
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
    listener>
    
    <context-param>
        <param-name>contextConfigLocationparam-name>
        <param-value>classpath:applicationContext.xmlparam-value>
    context-param>

    
    <servlet>
        <servlet-name>dispatcherServletservlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
        
        <init-param>
            <param-name>contextConfigLocationparam-name>
            <param-value>classpath:springmvc.xmlparam-value>
        init-param>
        
        <load-on-startup>1load-on-startup>
    servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServletservlet-name>
        <url-pattern>/url-pattern>
    servlet-mapping>
web-app>

　　　　启动 Tomcat 测试：

　　　　..........................

最后：为什么不把 springMVC 的配置移到 spring 配置文件中呢？或者说把两个配置文件内容合在一起，只保留一个配置文件。

　　参考博文：https://blog.csdn.net/f45056231p/article/details/81545964