Spring_2023_11_23_2 Spring整合mybatis----Xml 方式

Spring整合mybatis----Xml 方式

2023-11-23 15:18:12 星期四

1.依赖的引入

  <!--spring基础依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.20</version>
        </dependency>
        <!--spring连接数据库-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.20</version>
        </dependency>
        <!--添加mybatis依赖-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.4</version>
        </dependency>
        <!--mybatis与spring整合-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.2</version>
        </dependency>
        <!--mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.31</version>
        </dependency>
        <!--lombok-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.30</version>
        </dependency>
        <!--数据库连接池-->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-dbcp2</artifactId>
            <version>2.11.0</version>

2.配置文件

1. applicationContext.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
    <!--配置数据源-->
    <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/qinmanage"/>
        <property name="username" value="root"/>
        <property name="password" value="127003"/>
    </bean>
    <!--sqlSessionFactory-->
    <bean  id="sqlSessionFactory"  class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- mybatis配置文件-->
        <property name="configLocation" value="mybatis-config.xml"/>
        <!--数据源的配置-->
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--Mapper接口的代理-->
    <bean id="studentMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">
        <!--指定需要代理的接口-->
        <property name="mapperInterface" value="com.bboy.mapper.StudentMapper"/>
        <!--sqlSession工厂-->
        <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
    </bean>
    <!--Service注册-->
    <bean id="studentService" class="com.bboy.service.impl.StudentServiceImpl">
        <property name="studentMapper" ref="studentMapper"/>
    </bean>
</beans>

2. mybatis-config.xml

<?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>
    <typeAliases>
        <package name="com.bboy.pojo"/>
    </typeAliases>
    <mappers>
        <mapper resource="mapper/StudentMapper.xml"/>
    </mappers>
</configuration>

3.service

StudentService

package com.bboy.service;

import com.bboy.pojo.Student;

import java.util.List;

public interface StudentService {
    public List<Student> listStudents();
    public Student getStudentById(int id);
}

StudentServiceImpl

package com.bboy.service.impl;

import com.bboy.mapper.StudentMapper;
import com.bboy.pojo.Student;
import com.bboy.service.StudentService;

import java.util.List;

/**
 * @类描述：
 * @作者：秦帅
 * @时间：2023/11/23 0023 15:28:38
 */
public class StudentServiceImpl implements StudentService {
    private StudentMapper studentMapper;

    public void setStudentMapper(StudentMapper studentMapper) {
        this.studentMapper = studentMapper;
    }

    @Override
    public List<Student> listStudents() {
        return studentMapper.listStudents();
    }

    @Override
    public Student getStudentById(int id) {
        return studentMapper.getStudentById(id);
    }
}

4.mappeer

StudentMapper

package com.bboy.mapper;

import com.bboy.pojo.Student;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface StudentMapper {
    public List<Student> listStudents();
    public Student getStudentById(@Param("id") int id);
}

5.mapper映射文件

<?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.bboy.mapper.StudentMapper">
<select id="listStudents" resultType="Student">
    select * from t_student;
</select>
    <select id="getStudentById" resultType="Student">
    select * from t_student where id = #{id}
    </select>
</mapper>

6.测试类demo

package com.bboy.demo;

import com.bboy.pojo.Student;
import com.bboy.service.StudentService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

/**
 * @类描述：
 * @作者：秦帅
 * @时间：2023/11/23 0023 15:44:10
 */
public class Demo {
    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        StudentService studentService = (StudentService) context.getBean("studentService");
        List<Student> students = studentService.listStudents();
        System.out.println(students);

        Student student = studentService.getStudentById(2);
        System.out.println("***************************************************************************");
        System.out.println(student);
    }
}

7.运行结果