Java基础-SSM之Spring和Mybatis整合案例

　　　　　　　　　　　　　　　　Java基础-SSM之Spring和Mybatis整合案例

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　作者：尹正杰

版权声明：原创作品，谢绝转载！否则将追究法律责任。

 　　在之前我分享过mybatis和Spring的配置案例，想必大家对它们的配置已经很熟悉了，接下来我们把两者结合起来让他们一起来协同工作，帮我们在数据库中插入数据，编程起来是相当的方便。

一.准备环境

1>.案例分析

 　　我们想要把一条数据插入到数据库中，利用Spring和mybatis插件来完成，大致的流程图如下：

2>.数据库配置创建测试数据表 

　　在编程之前，我们需要启动数据库，并在数据库中提前创建出我们需要用到的测试表。创建过程如下：

create database yinzhengjie;

use yinzhengjie;

create table if not exists users(id int primary key auto_increment,name varchar(20) , age int) ;

二.实操演示

1>.创建新模块，引入Maven依赖

<?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>cn.org.yinzhengjie</groupId>
    <artifactId>MySpringMybatis</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>4.3.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.5.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.2.1</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.17</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.6.1</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.8.10</version>
        </dependency>
    </dependencies>
</project>

2>.创建相应的包并编写代码

 

/*
@author :yinzhengjie
Blog:http://www.cnblogs.com/yinzhengjie/tag/Java%E5%9F%BA%E7%A1%80/
EMAIL:y1053419035@qq.com
*/
package cn.org.yinzhengjie.sm.dao;

import java.util.List;

/**
 * Basedao,基本dao
 */
public interface BaseDao<T> {
    public void insert(T t) ;
    public void update(T t) ;
    public void delete(Integer id) ;
    public T selectOne(Integer id) ;
    public List<T> selectAll() ;
}

/*
@author :yinzhengjie
Blog:http://www.cnblogs.com/yinzhengjie/tag/Java%E5%9F%BA%E7%A1%80/
EMAIL:y1053419035@qq.com
*/
package cn.org.yinzhengjie.sm.dao.impl;

import cn.org.yinzhengjie.sm.dao.BaseDao;
import cn.org.yinzhengjie.sm.domain.User;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.support.SqlSessionDaoSupport;
import org.springframework.stereotype.Repository;

import javax.annotation.Resource;
import java.util.List;

/**
 *
 */
@Repository("userDao")
public class UserDaoImpl extends SqlSessionDaoSupport implements BaseDao<User> {

    public void insert(User user) {
        getSqlSession().insert("users.insert" , user) ;
    }

    public void update(User user) {
        getSqlSession().update("users.update", user);
    }

    public void delete(Integer id) {
        getSqlSession().delete("users.deleteOne", id);
    }

    public User selectOne(Integer id) {
        return getSqlSession().selectOne("users.selectOne", id);
    }

    public List<User> selectAll() {
        return getSqlSession().selectList("users.selectAll");
    }

    @Resource(name="sqlSessionFactory")
    public void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) {
        super.setSqlSessionFactory(sqlSessionFactory);
    }
}

/*
@author :yinzhengjie
Blog:http://www.cnblogs.com/yinzhengjie/tag/Java%E5%9F%BA%E7%A1%80/
EMAIL:y1053419035@qq.com
*/
package cn.org.yinzhengjie.sm.service;

import java.util.List;

/**
 * Created by Administrator on 2018/7/12.
 */
public interface BaseService<T> {
    public void insert(T t);

    public void update(T t);

    public void delete(Integer id);

    public T selectOne(Integer id);

    public List<T> selectAll();
}

/*
@author :yinzhengjie
Blog:http://www.cnblogs.com/yinzhengjie/tag/Java%E5%9F%BA%E7%A1%80/
EMAIL:y1053419035@qq.com
*/
package cn.org.yinzhengjie.sm.service.impl;

import cn.org.yinzhengjie.sm.dao.BaseDao;
import cn.org.yinzhengjie.sm.domain.User;
import cn.org.yinzhengjie.sm.service.BaseService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

/**
 * 用户服务实现类
 */
@Service("userService")
public class UserServiceImpl implements BaseService<User> {

    @Resource(name="userDao")
    private BaseDao<User> userDao ;

    public void insert(User user) {
        userDao.insert(user);
    }

    public void update(User user) {
        userDao.update(user);
    }

    public void delete(Integer id) {
        userDao.delete(id);
    }

    public User selectOne(Integer id) {
        return userDao.selectOne(id);
    }

    public List<User> selectAll() {
        return userDao.selectAll();
    }
}

/*
@author :yinzhengjie
Blog:http://www.cnblogs.com/yinzhengjie/tag/Java%E5%9F%BA%E7%A1%80/
EMAIL:y1053419035@qq.com
*/
package cn.org.yinzhengjie.sm.domain;

/**
 */
public class User {
    private Integer id;
    private String name;
    private int age;

    public Integer getId() {
        return id;
    }

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

    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;
    }
}

3>.编写mybatis的配置文件

<?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>
        <typeAlias type="cn.org.yinzhengjie.sm.domain.User"    alias="_User" />
    </typeAliases>
    <mappers>
        <mapper resource="UserMapper.xml"/>
    </mappers>
</configuration>

<?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">
<!-- 定义名字空间 -->
<mapper namespace="users">
    <insert id="insert">
        insert into users(name, age) values(#{name}, #{age}) ;
    </insert>

    <update id="update">
        update users set name = #{name} , age = #{age} where id = #{id}
    </update>

    <delete id="deleteOne">
        delete from users where id = #{id}
    </delete>

    <select id="selectOne" resultType="_User">
        select * from users where id = #{id}
    </select>

    <select id="selectAll" resultType="_User">
        select * from users
    </select>

</mapper>

4>.编写Spring的配置文件（环绕通知，文件名为：beans.xml）

<?xml version="1.0"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
                        http://www.springframework.org/schema/aop
                        http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
                        http://www.springframework.org/schema/context
                        http://www.springframework.org/schema/context/spring-context-4.3.xsd
                        http://www.springframework.org/schema/tx
                        http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
    <context:component-scan base-package="cn.org.yinzhengjie.sm.service,cn.org.yinzhengjie.sm.dao" />
    <!-- 数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:5200/yinzhengjie"/>
        <property name="user" value="root"/>
        <property name="password" value="yinzhengjie"/>
        <property name="maxPoolSize" value="10"/>
        <property name="minPoolSize" value="2"/>
        <property name="initialPoolSize" value="3"/>
        <property name="acquireIncrement" value="2"/>
    </bean>

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

    <!-- 事务管理器，在servie层面上实现事务管理的。 -->
    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- 事务通知 -->
    <tx:advice id="txAdvicd" transaction-manager="txManager">
        <tx:attributes>
            <tx:method name="insert*" propagation="REQUIRED" isolation="DEFAULT" />
            <tx:method name="update*" propagation="REQUIRED" isolation="DEFAULT" />
            <tx:method name="delete*" propagation="REQUIRED" isolation="DEFAULT" />
            <tx:method name="select*" propagation="REQUIRED" isolation="DEFAULT" read-only="true" />
            <tx:method name="*" propagation="REQUIRED" isolation="DEFAULT" />
        </tx:attributes>
    </tx:advice>

    <!-- 定义环绕通知 -->
    <aop:config>
        <aop:advisor pointcut="execution(* *..*Service.*(..))" advice-ref="txAdvicd" />
    </aop:config>
</beans>

5>.新建包名（cn.org.yinzhengjie.sm.main）， 编写测试代码如下：

/*
@author :yinzhengjie
Blog:http://www.cnblogs.com/yinzhengjie/tag/Java%E5%9F%BA%E7%A1%80/
EMAIL:y1053419035@qq.com
*/
package cn.org.yinzhengjie.sm.main;

import cn.org.yinzhengjie.sm.domain.User;
import cn.org.yinzhengjie.sm.service.BaseService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Demo {
    public static void main(String[] args) {
        ApplicationContext ac = new ClassPathXmlApplicationContext("beans.xml");
        BaseService service = (BaseService) ac.getBean("userService");
        User user = new User();
        user.setName("YinZhengJie");
        user.setAge(18);
        service.insert(user);

        User yzj = (User)service.selectOne(1);
        System.out.println(yzj.getName());
    }
}

　　以上代码执行结果如下：

6>.运行第5步的测试代码，并查看数据库信息：