SSM框架整合

数据库

SSM快速整合（推荐）

Spring MVC负责实现MVC设计模式， Mybatis负责数据持久， Spring负责管理 Spring MVC和Mybatis相关对象的创建和依赖注入。

创建Maven工程

• 使用模板

• 引入依赖

  <?xml version="1.0" encoding="UTF-8"?>
  
  <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>cn.xlh</groupId>
      <artifactId>ssmExample</artifactId>
      <version>1.0-SNAPSHOT</version>
      <packaging>war</packaging>
  
      <name>ssmExample Maven Webapp</name>
      <!-- FIXME change it to the project's website -->
      <url>http://www.example.com</url>
  
      <properties>
          <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
          <maven.compiler.source>1.7</maven.compiler.source>
          <maven.compiler.target>1.7</maven.compiler.target>
      </properties>
  
      <dependencies>
          <!-- SpringMVC -->
          <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-webmvc</artifactId>
              <version>5.3.9</version>
          </dependency>
  
  
          <!-- Spring JDBC -->
          <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-jdbc</artifactId>
              <version>5.3.9</version>
          </dependency>
  
  
          <!-- Spring AOP -->
          <!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-aop</artifactId>
              <version>5.3.9</version>
          </dependency>
  
          <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
          <dependency>
              <groupId>org.springframework</groupId>
              <artifactId>spring-aspects</artifactId>
              <version>5.3.9</version>
          </dependency>
  
  
          <!-- MyBatis -->
          <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
          <dependency>
              <groupId>org.mybatis</groupId>
              <artifactId>mybatis</artifactId>
              <version>3.4.6</version>
          </dependency>
  
  
          <!-- MyBatis整合Spring -->
          <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
          <dependency>
              <groupId>org.mybatis</groupId>
              <artifactId>mybatis-spring</artifactId>
              <version>1.3.1</version>
          </dependency>
  
  
          <!-- MySQL驱动 -->
          <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
          <dependency>
              <groupId>mysql</groupId>
              <artifactId>mysql-connector-java</artifactId>
              <version>5.1.46</version>
          </dependency>
  
  
          <!-- C3P0 -->
          <dependency>
              <groupId>com.mchange</groupId>
              <artifactId>c3p0</artifactId>
              <version>0.9.5.2</version>
              <type>jar</type>
              <scope>compile</scope>
          </dependency>
  
          <!-- JSTL -->
          <dependency>
              <groupId>jstl</groupId>
              <artifactId>jstl</artifactId>
              <version>1.2</version>
          </dependency>
  
          <!-- ServletAPI -->
          <dependency>
              <groupId>javax.servlet</groupId>
              <artifactId>javax.servlet-api</artifactId>
              <version>3.1.0</version>
          </dependency>
  
          <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
          <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
          <dependency>
              <groupId>org.projectlombok</groupId>
              <artifactId>lombok</artifactId>
              <version>1.18.12</version>
              <scope>provided</scope>
          </dependency>
  
          <dependency>
              <groupId>junit</groupId>
              <artifactId>junit</artifactId>
              <version>4.11</version>
              <scope>test</scope>
          </dependency>
      </dependencies>
  
      <build>
          <finalName>ssmExample</finalName>
          <resources>
              <resource>
                  <directory>src/main/java</directory>
                  <includes>
                      <include>**/*.properties</include>
                      <include>**/*.xml</include>
                  </includes>
                  <filtering>false</filtering>
              </resource>
          </resources>
          <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
              <plugins>
                  <plugin>
                      <artifactId>maven-clean-plugin</artifactId>
                      <version>3.1.0</version>
                  </plugin>
                  <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
                  <plugin>
                      <artifactId>maven-resources-plugin</artifactId>
                      <version>3.0.2</version>
                  </plugin>
                  <plugin>
                      <artifactId>maven-compiler-plugin</artifactId>
                      <version>3.8.0</version>
                  </plugin>
                  <plugin>
                      <artifactId>maven-surefire-plugin</artifactId>
                      <version>2.22.1</version>
                  </plugin>
                  <plugin>
                      <artifactId>maven-war-plugin</artifactId>
                      <version>3.2.2</version>
                  </plugin>
                  <plugin>
                      <artifactId>maven-install-plugin</artifactId>
                      <version>2.5.2</version>
                  </plugin>
                  <plugin>
                      <artifactId>maven-deploy-plugin</artifactId>
                      <version>2.8.2</version>
                  </plugin>
              </plugins>
          </pluginManagement>
      </build>
  </project>

配置web.xml

web.xml中配置 Springmvc、 Spring、字符编码过滤器、加静态资源

<!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>
    <display-name>Archetype Created Web Application</display-name>
    <!-- 启动Spring -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- Spring MVC -->
    <servlet>
        <servlet-name>dispatcherServlet</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>
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!-- 字符编码过滤器 -->
    <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>

    <!-- 加载静态资源 -->
    <servlet-mapping>
        <servlet-name>default</servlet-name>
        <url-pattern>*.js</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>default</servlet-name>
        <url-pattern>*.css</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>default</servlet-name>
        <url-pattern>*.jpg</url-pattern>
    </servlet-mapping>
</web-app>

Spring整合mybatis

• spring.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:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
	http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
">

    <!-- 整合MyBatis -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="user" value="root"></property>
        <property name="password" value="root"></property>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test?useUnicode=true&amp;characterEncoding=UTF-8"></property>
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="initialPoolSize" value="5"></property>
        <property name="maxPoolSize" value="10"></property>
    </bean>

    <!-- 配置MyBatis SqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="mapperLocations" value="classpath:com/southwind/repository/*.xml"></property>
        <property name="configLocation" value="classpath:config.xml"></property>
    </bean>

    <!-- 扫描自定义的Mapper接口 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.southwind.repository"></property>
    </bean>

</beans>

配置Mybatis

• config.xml配置一些 Mybatis辅助信息，比如打印SQL等

  <?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>
          <!-- 打印SQL-->
          <setting name="logImpl" value="STDOUT_LOGGING" />
      </settings>
  
      <typeAliases>
          <!-- 指定一个包名，MyBatis会在包名下搜索需要的JavaBean-->
          <package name="com.southwind.entity"/>
      </typeAliases>
  
  </configuration>

配置SpringMVC

• springmvc.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:mvc="http://www.springframework.org/schema/mvc"
         xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
          http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
          http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
  
      <!-- 启动注解驱动 -->
      <mvc:annotation-driven></mvc:annotation-driven>
  
      <!-- 扫描业务代码 -->
      <context:component-scan base-package="com.southwind"></context:component-scan>
  
      <!-- 配置视图解析器 -->
      <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
          <property name="prefix" value="/"></property>
          <property name="suffix" value=".jsp"></property>
      </bean>
  
  </beans>

• 添加资源读取配置pom.xml

  <build>
          <finalName>SSM_Demo</finalName>
          <!--设置加载资源-->
          <resources>
              <resource>
                  <directory>src/main/java</directory>
                  <includes>
                      <include>
                          **/*.xml
                      </include>
                  </includes>
              </resource>
              <resource>
                  <directory>src/main/resources</directory>
                  <includes>
                      <include>
                          *.xml
                      </include>
                      <include>
                          *.properties
                      </include>
                  </includes>
              </resource>
          </resources>
      </build>
  </project>

新建dao、bean、mapper等

• cn.xlh.entity.User

  package com.southwind.entity;
  
  import lombok.Data;
  
  @Data
  public class User {
      private int id;
      private String name;
      private String password;
      private double score;
  }

• cn.xlh.repository.UserRepository

  package com.southwind.repository;
  
  import com.southwind.entity.User;
  
  import java.util.List;
  
  public interface UserRepository {
      public List<User> findAll();
  }

• cn.xlh.repository.UserRepository.xml

  <?xml version="1.0" encoding="UTF-8" ?>
  <!DOCTYPE mapper
          PU<?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.southwind.repository.UserRepository">
      <select id="findAll" resultType="User">
          select *
          from user
      </select>
  </mapper>BLIC "-//mybatis.org//DTD Mapper 3.0//EN"
          "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
  
  <mapper namespace="cn.xlh.dao.BookMapper">
      <!--查询全部Book-->
      <select id="queryAllBook" resultType="Books">
          SELECT *
          from books
      </select>
  </mapper>

• cn.xlh.service.UserService

  package com.southwind.service;
  
  import com.southwind.entity.User;
  
  import java.util.List;
  
  public interface UserService {
      public List<User> findAll();
  }

• cn.xlh.service.impl.UserServiceImpl

  package com.southwind.service.impl;
  
  import com.southwind.entity.User;
  import com.southwind.repository.UserRepository;
  import com.southwind.service.UserService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  
  import java.util.List;
  
  @Service
  public class UserServiceImpl implements UserService {
  
      @Autowired
      private UserRepository userRepository;
  
      @Override
      public List<User> findAll() {
          return userRepository.findAll();
      }
  }

新建BookController

• cn.xlh.controller.UserHandler

  package com.southwind.controller;
  
  import com.southwind.service.UserService;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.annotation.GetMapping;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.servlet.ModelAndView;
  
  @Controller
  public class UserHandler {
      @Autowired
      private UserService userService;
  
      @GetMapping("/findAll")
      public ModelAndView findAll() {
          System.out.println("findAll被执行");
          ModelAndView modelAndView = new ModelAndView();
          modelAndView.setViewName("index");
          modelAndView.addObject("list", userService.findAll());
          return modelAndView;
      }
  }

新建index.jsp文件

<%--
  Created by IntelliJ IDEA.
  User: southwind
  Date: 2019-03-21
  Time: 09:55
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ page isELIgnored="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<c:forEach items="${list}" var="user">
    ${user.id}--${user.name}--${user.score}--${user.password}<br/>
</c:forEach>
</body>
</html>