Spring学习笔记（九）简单的SSM框架整合

玛卡巴卡yang2024-06-16 16:36

实验目的

掌握SSM框架整合。

实验环境

硬件：PC机

操作系统：Windows

开发工具：idea

实验内容

整合SSM框架。

实验步骤

  1. 搭建SSM环境：构建web项目，导入需要的jar包，通过单元测试测试各层框架搭建的正确性。

2

Mapper编写User详情查询；service编写详情查询业务逻辑控制 controller层控制页面的跳转，在详情页面渲染用户详情。

项目结构：

Pom.xml配置文件

注意完成这部分后需要重新加载项目，这里创建了一个maven项目

XML 复制代码 
<?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>com.example</groupId>
    <artifactId>SpringMVC1</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>
        <!-- Spring核心依赖 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.3.10</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.10</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>5.3.10</version>
        </dependency>
        <!-- Spring MVC依赖 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.10</version>
        </dependency>
        <!-- MyBatis依赖 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.7</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.7</version>
        </dependency>
        <!-- 数据库驱动和连接池 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.28</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.10</version>
        </dependency>
        <!-- Servlet API -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>4.0.1</version>
            <scope>provided</scope>
        </dependency>
        <!-- JUnit测试 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.3.10</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
    <build>
        <!--          加入tomcat插件-->
        <plugins>

            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <uriEncoding>utf-8</uriEncoding>
                    <port>8080</port> <!-- 访问端口-->
                    <!--虚拟项目名-->
                    <path>/SSM测试</path> <!-- 访问路径，一般就是你的项目名注意前面有个'/'-->
                </configuration>
            </plugin>
        </plugins>
    </build>


</project>

UserController

java 复制代码 
package org.example.controller;
import org.example.model.User;
import org.example.service.UserServie;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserServie userServie;
    @RequestMapping(value = "/{id}", method = RequestMethod.GET)
    public ModelAndView getUserById(@PathVariable("id") Long id) {
        ModelAndView mav = new ModelAndView();
        User user = userServie.getById(id);
        // 添加user对象到ModelAndView中
        mav.addObject("user", user);
        // 设置视图名称为userDetails，对应userDetails.jsp页面
        mav.setViewName("userDetails");
        return mav;
    }
}

UserMapper

java 复制代码 
package org.example.mapper;
import org.example.model.User;
public interface UserMapper {
    User getById(Long id);
    User getByUsername(String username); // 添加根据username查询的方法
}

User

java 复制代码 
package org.example.model;
public class User {
    private Long id;
    private String username;
    private String password;
    private Long departmentId;
    public User() {
    }
    public User(Long id, String username, String password, Long departmentId) {
        this.id = id;
        this.username = username;
        this.password = password;
        this.departmentId = departmentId;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getusername() {
        return username;
    }

    public void setusername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public Long getDepartmentId() {
        return departmentId;
    }

    public void setDepartmentId(Long departmentId) {
        this.departmentId = departmentId;
    }
}

UserServiceImpl

java 复制代码 
package org.example.service.impl;

import org.example.mapper.UserMapper;
import org.example.model.User;
import org.example.service.UserServie;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserServie {
    @Autowired
    private UserMapper userMapper;

    @Override
    public User getById(Long id) {
        return userMapper.getById(id);
    }

    @Override
    public User getByUsername(String username) {
        return userMapper.getByUsername(username);
    }
}

UserServie

java 复制代码 
package org.example.service;
import org.example.model.User;
public interface UserServie {
    User getById(Long id);
    User getByUsername(String username); // 添加根据username查询的方法声明
}

编写UserMapper.xml

注意：s_user是数据库mydb中的一个数据表

XML 复制代码 
<?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.example.mapper.UserMapper">
    <select id="getById" parameterType="long" resultType="org.example.model.User">
        SELECT id, username, password, dept_id AS departmentId
        FROM  s_user
        WHERE id = #{id}
    </select>
    <select id="getByUsername" resultType="org.example.model.User"></select>
</mapper>

编写applicationContext.xml

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

    <!-- 开启注解扫描 -->
    <context:component-scan base-package="org.example"/>

    <!-- 配置MyBatis数据源（这里要结合具体mysql情况修改） -->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/数据库名"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
    </bean>

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

    <!-- 扫描MyBatis的Mapper接口 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="org.example.mapper"/>
    </bean>

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

    <!-- 启用注解驱动 -->
    <mvc:annotation-driven/>

    <!-- 配置视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

编写user Details.jsp

XML 复制代码 
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>User Details</title>
</head>
<body>
<h2>User Details</h2>
<table border="1">
    <tr>
        <th>ID</th>
        <th>Name</th>
        <th>Password</th>
        <th>Department ID</th>
    </tr>
    <tr>
        <td>${user.id}</td>
        <td>${user.username}</td>
        <td>${user.password}</td>
        <td>${user.departmentId}</td>
    </tr>
</table>
</body>
</html>

编写web.xml

XML 复制代码 
<?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">

    <!-- Spring MVC前端控制器 -->
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

编写一个测试类用于测试整合情况

复制代码 
UserServicelmplTest.java
java 复制代码 
package org.example.service.impl;

import org.example.model.User;
import org.example.service.UserServie;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import static org.junit.Assert.*;

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

    @Autowired
    private UserServie userService;

    @Test
    public void testGetById() {
        Long userId = 11L;
        User user = userService.getById(userId);
        assertNotNull("The user should not be null", user);
        assertEquals("The user ID should match the expected ID", userId, user.getId());
        System.out.println("Retrieved user: " + user.toString());

    }
}

测试结果

运行效果

部署本地后在本地浏览器的运行地址为：localhost:8080/SSM测试/user/12,其中12为响应的id

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