mybatis与spring项目整合

企业开发 2023-06-18 19:21:43 阅读次数: 0

先对pom.xml文件导入所需要的依赖包

这是整个pom文件的内容

<?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.javacto</groupId>
    <artifactId>sping_mybatis02</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
<!--        mybatis包-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.7</version>
        </dependency>
<!--        mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.26</version>
        </dependency>
<!--        spring-context包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.13</version>
        </dependency>
<!--        spring-tx包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.3.13</version>
        </dependency>
<!--        spring-jdbc包-->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.13</version>
        </dependency>
<!--        spring-mybatis包-->
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.6</version>
        </dependency>
<!--        阿里连接池druid包-->
        <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.8</version>
        </dependency>
<!--        测试junit包-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
<!--    spring-test包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.3.13</version>
        </dependency>
    </dependencies>
</project>

该spring与mybatis整合所有所需的jar包有以下配套内容

   <dependencies>
<!--        mybatis包-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.7</version>
        </dependency>
<!--        mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.26</version>
        </dependency>
<!--        spring-context包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.13</version>
        </dependency>
<!--        spring-tx包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.3.13</version>
        </dependency>
<!--        spring-jdbc包-->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.13</version>
        </dependency>
<!--        spring-mybatis包-->
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.6</version>
        </dependency>
<!--        阿里连接池druid包-->
        <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.8</version>
        </dependency>
<!--        测试junit包-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
<!--    spring-test包-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.3.13</version>
        </dependency>
    </dependencies>

对项目进行创建包以及类

1：配置文件（resources目录下的配置文件）

（1）：SqlMapConfig.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>

</configuration>
（2）：db.properties
jdbc.driverClassName=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql:///mybatis?characterEncoding=utf-8
jdbc.username=root
jdbc.password=123456
（3）：applicationContext.xml
<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
       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/context
              http://www.springframework.org/schema/context/spring-context.xsd">
<!--    扫描包-->
    <context:component-scan base-package="com.javacto"></context:component-scan>
<!--    读取配置文件-->
<!--    <context:property-placeholder location="classpath:db.properties"></context:property-placeholder>-->
    <context:property-placeholder location="classpath:db.properties"></context:property-placeholder>
<!--    调用阿里创建druid-->
<!--    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">-->
<!--    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">-->
<!--        <property name="driverClassName" value="${jdbc.driverClassName}"></property>-->
<!--        <property name="url" value="${jdbc.url}"></property>-->
<!--        <property name="username" value="${jdbc.username}"></property>-->
<!--        <property name="password" value="${jdbc.password}"></property>-->
<!--    </bean>-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driverClassName}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
<!--    spring创建SqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--        引入数据源-->
        <property name="dataSource" ref="dataSource"></property>
        <property name="configLocation" value="classpath:SqlMapConfig.xml"></property>
        <property name="mapperLocations" value="classpath*:mapper/StudentDao.xml"></property>
    </bean>

    <!-- 该对象可以自动扫描持久层接口，并为接口创建代理对象 -->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.javacto.dao"></property>
    </bean>

</beans>
（4）：mapper包下的StudnetDao.xml

StudentDao.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.javacto.dao.StudentDao">
    <select id="findAll" resultType="com.javacto.pojo.Student">
        select * from student
    </select>
</mapper>

2:java包下目录

（1）：pojo包（Student.java）
package com.javacto.pojo;

public class Student {
    private int sid;
    private String name;
    private int age;
    private String sex;
    private int classId;

    public Student() {
    }

    public Student(String name, int age, String sex, int classId) {
        this.name = name;
        this.age = age;
        this.sex = sex;
        this.classId = classId;
    }

    public Student(int sid, String name, int age, String sex, int classId) {
        this.sid = sid;
        this.name = name;
        this.age = age;
        this.sex = sex;
        this.classId = classId;
    }

    public int getSid() {
        return sid;
    }

    public void setSid(int sid) {
        this.sid = sid;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public int getClassId() {
        return classId;
    }

    public void setClassId(int classId) {
        this.classId = classId;
    }

    @Override
    public String toString() {
        return "Student{" +
                "sid=" + sid +
                ", name='" + name + '\'' +
                ", age=" + age +
                ", sex='" + sex + '\'' +
                ", classId=" + classId +
                '}';
    }
}
（2）：dao包（StudentDao.java）
package com.javacto.dao;

import com.javacto.pojo.Student;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import java.util.List;
@Repository
public interface StudentDao {
//    查询所有信息
//    @Select("select * from student")
    List<Student> findAll();
}
（3）：service包（StudentService.java）
package com.javacto.service;

import com.javacto.dao.StudentDao;
import com.javacto.pojo.Student;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class StudentService {
    @Autowired
    private StudentDao studentDao;
    public List<Student> findAll(){
        return studentDao.findAll();
    }
}

3:test包下目录

（1）：test包（StudentServiceTest）
package com.java.test;

import com.javacto.pojo.Student;
import com.javacto.service.StudentService;
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 java.util.List;

 告知创建spring容器时读取哪个配置类或配置文件
//@RunWith(SpringJUnit4ClassRunner.class)
 配置类写法：@ContextConfiguration(classes=配置类.class)
 JUnit使用Spring方式运行代码，即自动创建spring容器。
//@ContextConfiguration(locations = "classpath:applicationContext.xml")
@RunWith(SpringJUnit4ClassRunner.class)
//@ContextConfiguration(classes = com.javacto.dao.StudentDao.class)
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class StudentServiceTest {
    @Autowired
    private StudentService studentService;
    @Test
    public void findAll(){
        List<Student> all = studentService.findAll();
        all.forEach(System.out::println);
    }
}

4：数据库表

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