SSM整合Web项目流程图详解_ssm框架流程图

作者：Cpp五条 | 2024-03-15 09:27:08

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ssm框架流程图

SSM框架整合

Spring + Spring MVC + MyBatis

Spring MVC 负责实现 MVC 设计模式，MyBatis 负责数据持久层，Spring 负责管理 Spring MVC 和MyBatis 相关对象的创建和依赖注⼊。
在这里插入图片描述

创建 Maven ⼯程，pom.xml

 <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>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
        </dependency>
        </dependencies>

    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
        </resources>
    </build>
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web.xml 中配置 SpringMVC、Spring、字符编码过滤器、加载静态资源。

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">

    <!--加载Spring-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:config.xml</param-value>
    </context-param>
    <!--Spring整合Web-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!--加载Spring MVC-->
     <servlet>
         <servlet-name>mvc</servlet-name>
         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
         <init-param>
             <param-name>contextConfigLocation</param-name>
             <param-value>classpath:config-mvc.xml</param-value>
         </init-param>
     </servlet>
    <servlet-mapping>
        <servlet-name>mvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>default</servlet-name>
        <url-pattern>*.jpg</url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>default</servlet-name>
        <url-pattern>*.js</url-pattern>
    </servlet-mapping>

    <servlet-mapping>
        <servlet-name>default</servlet-name>
        <url-pattern>*.png</url-pattern>
    </servlet-mapping>
    
    <servlet-mapping>
        <servlet-name>default</servlet-name>
        <url-pattern>*.css</url-pattern>
    </servlet-mapping>
    
    <!--编码过滤器-->
    <filter>
        <filter-name>encoding</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>encoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>
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在 config.xml 中配置 MyBatis 和 Spring 的整合。

db.properties：

db.username=root
db.password=root
db.driver=com.mysql.cj.jdbc.Driver
db.url=jdbc:mysql://localhost:3306/test1?serverTimezone=UTC 
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 <?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:aop="http://www.springframework.org/schema/aop"
       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/aop
    http://www.springframework.org/schema/aop/spring-aop.xsd
     http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
">

<!-- 整合MyBatis -->
    <context:property-placeholder location="classpath:db.properties"></context:property-placeholder>

    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="user" value="${db.username}"></property>
        <property name="password" value="${db.password}"></property>
        <property name="jdbcUrl" value="${db.url}"></property>
        <property name="driverClass" value="${db.driver}"></property>
    </bean>

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

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

    <!--配置事务-->
    <bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager" id="transactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <tx:annotation-driven transaction-manager="transactionManager" />

</beans>
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config-mybatis.xml 配置⼀些 MyBatis 辅助信息，⽐如打印 SQL 等。

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       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.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 启动注解驱动 -->
    <mvc:annotation-driven></mvc:annotation-driven>

    <!--扫描业务代码-->
    <context:component-scan base-package="org.youyuan"></context:component-scan>

    <!--视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="viewResolver">
        <property name="prefix" value="/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>
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配置 config-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:context="http://www.springframework.org/schema/context"
       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.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- 启动注解驱动 -->
    <mvc:annotation-driven></mvc:annotation-driven>

    <!--扫描业务代码-->
    <context:component-scan base-package="org.youyuan"></context:component-scan>

    <!--视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="viewResolver">
        <property name="prefix" value="/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>
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实体类：

@Data
public class User {
    private Long id; 
    private String username; 
    private String address; 
}
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Mapper：

package org.youyuan.mapper;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;
import org.youyuan.bean.User;

public interface UserMapper { 
    List<User> selectAll();  
}
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Mapper.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="org.youyuan.mapper.UserMapper" >

  <resultMap id="BaseResultMap" type="org.youyuan.bean.User" >
    <id column="id" property="id" jdbcType="BIGINT" />
    <result column="username" property="username" jdbcType="VARCHAR" />
    <result column="address" property="address" jdbcType="VARCHAR" />
  </resultMap> 

  <select id="selectAll" resultMap="BaseResultMap" >
    select id, username, address
    from user
  </select>
</mapper>
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Servilce:

public interface UserService {
    List<User> getAllUser();
} 
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ServiceImpl:

package org.youyuan.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.youyuan.bean.User;
import org.youyuan.mapper.UserMapper;
import org.youyuan.service.UserService;

import java.util.List;

@Service
@Transactional
public class UserServiceImpl implements UserService {

    @Autowired
    UserMapper userMapper; 
    public List<User> getAllUser() {
        try {
            List<User> users = userMapper.selectAll(); 
            return users;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}

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Controller:

@Controller
public class UserController {

    @Autowired
    UserService userService;

    @GetMapping("/getAllUser")
    public String getAllUser(Model model){
        List<User> userList = userService.getAllUser();
        model.addAttribute("users",userList);
        return "index";
    }
}

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jsp:

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<html>
<head>
    <title>Title</title>
</head>
<body>
<c:forEach items="${users}" var="user">
    ${user.id}-->${user.username}-->${user.address}<br> 
</c:forEach>
</body>
</html> 
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