程序员社区
当前位置：IDEA激活码 > 未分类 > 正文

25. SSM 框架整合

2022-02-05 分类：未分类 阅读(305)

SSM 框架整合

1、实际开发中通常不会采用 SSM 框架整合的方式；

2、学习 SSM 是为了弄懂框架整合的底层原理；

Web 框架技术的迭代：

第一代：SSH(Spring/Struts/Hibernate) → 第二代：SSM(Spring/SpringMVC/MyBatis) → 第三代：Spring Boot

在这里插入图片描述

  1. Spring MVC 框架负责客户端到服务器程序的交互，接收客户端请求并响应；

  2. MyBatis 负责 Web 应用程序与数据库的交互，完成数据模型的 CRUD；

  3. Spring 负责管理 SpringMVC 和 MyBatis 相关对象的创建、依赖注入和维护；

SSM 框架整合具体步骤如下：

第一步：创建 Maven 工程，导入 spring/springmvc/mybatis 相关的依赖 jar 包；

<dependencies>
    <!-- SpringMVC -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.0.11.RELEASE</version>
    </dependency>
    <!-- Spring JDBC -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.0.11.RELEASE</version>
    </dependency>
    <!-- Spring AOP -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>5.0.11.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>5.0.11.RELEASE</version>
    </dependency>
    <!-- MyBatis -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.4.5</version>
    </dependency>
    <!-- MyBatis整合Spring -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>1.3.1</version>
    </dependency>
    <!-- MySQL驱动 -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.11</version>
    </dependency>
    <!-- C3P0 -->
    <dependency>
        <groupId>c3p0</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.1.2</version>
    </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>

    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.6</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

<build>
	<resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.xml</include>
            </includes>
        </resource>
    </resources>
</build>

2、在 web.xml 中配置 SpringMVC、Spring、字符编码过滤器、加载静态资源等；

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
         xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <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>
  
  <!-- 字符过滤编码器 -->
  <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>*.jpg</url-pattern>
  </servlet-mapping>

</web-app>

3、创建 spring.xml、springmvc.xml、mybatis.xml 配置文件；

3.1 在 spring.xml 文件中配置 MyBatis 和 Spring 的整合

<?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="123456"></property>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test?useUnicode=true&amp;characterEncoding=UTF-8"></property>
        <property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property>
        <property name="initialPoolSize" value="20"></property>
        <property name="maxPoolSize" value="50"></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/trainingl/repository/*.xml"></property>
        <property name="configLocation" value="classpath:mybatis.xml"></property>
    </bean>

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

3.2 在 mybatis.xml 中配置一些 MyBatis 的辅助信息，比如：打印SQL语句等

<?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>
    <!--打印SQL-->
    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>
</configuration>

3.3 配置 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.trainingl"></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>

4、创建实体类 User

package com.trainingl.entity;

import lombok.Data;

@Data
public class User {
    private long id;
    private String username;
    private String password;
    private Double score;
}

5、数据持久层接口 UserRepository

package com.trainingl.repository;

import com.trainingl.entity.User;

import java.util.List;

public interface UserRepository {
    public List<User> findAll();
}

6、UserRepository.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.trainingl.repository.UserRepository">

    <select id="findAll" resultType="com.trainingl.entity.User">
        select * from User
    </select>
</mapper>

7、服务层接口 UserService

package com.trainingl.service;

import com.trainingl.entity.User;

import java.util.List;

public interface UserService {
    public List<User> findAll();
}

8、服务层实现 UserServiceImpl

package com.trainingl.service.Impl;

import com.trainingl.entity.User;
import com.trainingl.repository.UserRepository;
import com.trainingl.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;

    public List<User> findAll(){
        return userRepository.findAll();
    }
}

9、控制层 UserHandler

package com.trainingl.controller;

import com.trainingl.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
@RequestMapping("/user")
public class UserHandler {
    @Autowired
    private UserService userService;

    @GetMapping("/list")
    public ModelAndView findAll(){
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("index");
        modelAndView.addObject("userList",userService.findAll());
        return modelAndView;
    }
}

10、JSP 视图层

<%--
  Created by IntelliJ IDEA.
  User: 17209
  Date: 2021-09-18
  Time: 11:19
  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>用户信息</title>
</head>
<body>
    <table>
        <tr>
            <th>编号</th>
            <th>用户名</th>
            <th>密码</th>
            <th>分数</th>
        </tr>
        <c:forEach items="${userList}" var="user">
            <tr>
                <td>${user.id}</td>
                <td>${user.username}</td>
                <td>${user.password}</td>
                <td>${user.score}</td>
            </tr>
        </c:forEach>
    </table>
</body>
</html>

程序的运行结果如下：

在这里插入图片描述
至此，本专栏介绍完了SSM框架的基本语法和使用技巧。

赞(0) 打赏
未经允许不得转载：IDEA激活码 » 25. SSM 框架整合

相关推荐

IDEA永久激活破解教程,IDEA激活码

pycharm激活破解教程,pycharm激活码

Java视频资源

Java电子书

DataGrip激活教程 Docker Git教程 IntellIJ idea IntelliJ IDEA激活码 Java Java IO Java基础 Java基础面试题 Java集合面试题 Java面试题 JVM JVM面试题 Linux MySQL MySQL面试题 Nginx PyCharm PyCharm激活 redis Redis SpringBoot SpringBoot SpringBoot面试题 Web开发 剑指Offer系列 多线程 多线程并发面试题 字符串面试题 数据库 数据库 数据结构与算法 未分类 爬虫 电子书 软件下载

一个分享Java & Python知识的社区