SSM框架详解-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_43730516/article/details/109336809

SSM=Spring+SpringMVC+Mybatis
SpringMVC容器:管理web相关的对象，主要是Controller,视图对象等,数据来自Servlce
Spring容器：管理Service,Dao，工具类等对象
Mybatis：访问数据库

用户处理过程:
用户发起请求—->SpringMVC的Controller——>Service——>Dao——->DB数据库
SpringMVC和Spring的关系:SpringMVC看做Spring的子容器，从继承角度来看，SpringMVC子容器可以访问Spring父容器的对象

项目目录:
在pom.xml文件中导入依赖:

<dependencies>

    <!-- https://mvnrepository.com/artifact/org.junit.jupiter/junit-jupiter-api -->
    <dependency>
      <groupId>org.junit.jupiter</groupId>
      <artifactId>junit-jupiter-api</artifactId>
      <version>5.6.2</version>
      <scope>test</scope>
    </dependency>

    <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>4.0.1</version>
      <scope>provided</scope>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.8.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.10</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.19</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.2</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-tx -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>5.2.9.RELEASE</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.2.9.RELEASE</version>
    </dependency>

    <!--SpringMVC依赖-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.8.RELEASE</version>
    </dependency>

    <!--jackson依赖-->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.11.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.9.8</version>
    </dependency>

  </dependencies>

配置文件：

springmvc.xml文件(SpringMVC核心配置文件):

<!--SpringMVC配置文件-->
    <!--声明组件扫描器-->
    <context:component-scan base-package="com.bjpowernode.controller"/>
    <!--声明视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!--声明注解驱动-->
    <mvc:annotation-driven/>

applicationContext.xml(Spring核心配置文件):

<!--Spring配置文件-->
    <!--指定属性配置文件的位置-->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!--声明数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="url" value="${mysql.url}"/>
        <property name="username" value="${mysql.username}"/>
        <property name="password" value="${mysql.password}"/>
    </bean>

    <!--声明SqlSessionFactoryBean-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!--声明Mybatis的扫描器，创建Dao对象-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <property name="basePackage" value="com.bjpowernode.dao"/>
    </bean>

    <!--声明组件扫描器，指定Service注解包名-->
    <context:component-scan base-package="com.bjpowernode.service"/>

mybatis-config.xml(MyBatis核心配置文件):

<configuration>
    <typeAliases>
        <package name="com.bjpowernode.entity"/>
    </typeAliases>
    <mappers>
        <mapper resource="Mappers/StudentDaoMappers.xml"/>
    </mappers>
</configuration>

StudentDaoMappers.xml:

<mapper namespace="com.bjpowernode.dao.StudentDao">
    <select id="selectStudents" resultType="Student">
     select * from student
    </select>
    <insert id="insertStudent" parameterType="Student">
        insert into student(id,name,age) values (#{id},#{name},#{age})
    </insert>
</mapper>

web.xml：

<!--注册SpringMVC的DispatcherServlet-->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <!--指定Spring的配置文件-->
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
  <!--注册Spring的ContextLoaderListener-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <!--指定Spring的配置文件-->
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!--注册CharacterEncodingFilter-->
  <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>forceRequestEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>forceResponseEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>characterEncodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

前端：

addStudent.jsp文件：

<div align="center">
        <form action="student/addStudent.do" method="post">
            <table>
                <tr>
                    <td>id:</td>
                    <td><input type="text" name="id"/> </td>
                </tr>
                <tr>
                    <td>姓名:</td>
                    <td><input type="text" name="name"/> </td>
                </tr>
                <tr>
                    <td>年龄:</td>
                    <td><input type="text" name="age"/> </td>
                </tr>
                <tr>
                    <td></td>
                    <td><input type="submit" value="save"/> </td>
                </tr>
            </table>
        </form>
    </div>

selectStudent.jsp文件:

<html>
<head>
    <title>Title</title>
    <script type="text/javascript" src="js/jquery-1.6.4.min.js"></script>
    <script type="text/javascript">
        $(function () {
            $.ajax({
                url:"student/queryAll.do",
                type:"post",
                success:function(response){
                    alert(response.id+"    "+response.name+"     "+response.age)
                    console.log(response)
                    $("#stubody").html("");
                        $("#stubody").append("<tr>")
                        .append("<td>"+response.id+"</td>")
                        .append("<td>"+response.name+"</td>")
                        .append("<td>"+response.age+"</td>")
                        .append("</tr>")
                }
            })
        })
    </script>
</head>
<body>
    <div align="center">
        <table>
            <thead>
            <tr>
                <td>id</td>
                <td>name</td>
                <td>age</td>
            </tr>
            </thead>
            <tbody id="stubody">

            </tbody>
        </table>
    </div>
</body>
</html>

后端Controller层：

@Controller
@RequestMapping("/student")
public class StudentController {
    /**引用类型自动注入@Autowired ,@Resource
     * */
    @Autowired
    private StudentService studentService;

    @RequestMapping("/addStudent.do")
    public ModelAndView AddStudent(Student student){
        int nums= studentService.addStudent(student);
        String msg="学生["+student.getName()+"]注册成功!";
        if(nums>0){
            msg="学生["+student.getName()+"]注册成功!";
        }
        ModelAndView mv=new ModelAndView();
        mv.addObject("msg",msg);
        mv.setViewName("result");
        return mv;
    }

    @RequestMapping("/queryAll.do")
    @ResponseBody
    public Student queryStudent(){
        return studentService.findAll().get(0);
    }
}

SSM整合开发详细介绍