SPring整合Mybatis方式一

Spring整合Mybatis

需要maven包：

mysql-connector-java 5.1.47，

mybatis 3.5.2，

spring-webmvc 5.2.2.RELEASE，

spring-jdbc 5.2.2.RELEASE，

aspectjweaver 1.8.13

mybatis-spring 2.0.2，

目录:

 

 

pom.xml配置：

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>4.0.0modelVersion>

    <groupId>org.examplegroupId>
    <artifactId>SpringMybatisartifactId>
    <version>1.0-SNAPSHOTversion>

    <dependencies>

        
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>5.1.47version>
        dependency>
        
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatisartifactId>
            <version>3.5.2version>
        dependency>
        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-webmvcartifactId>
            <version>5.2.2.RELEASEversion>
        dependency>
        
        <dependency>
            <groupId>org.springframeworkgroupId>
            <artifactId>spring-jdbcartifactId>
            <version>5.2.2.RELEASEversion>
        dependency>
        
        <dependency>
            <groupId>org.aspectjgroupId>
            <artifactId>aspectjweaverartifactId>
            <version>1.8.13version>
        dependency>
        
        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatis-springartifactId>
            <version>2.0.2version>
        dependency>

    dependencies>
    
    <build>
        <resources>
            <resource>
                <directory>src/main/javadirectory>
                <includes>
                    <include>**/*.propertiesinclude>
                    <include>**/*.xmlinclude>
                includes>
                <filtering>falsefiltering>
            resource>
            <resource>
                <directory>src/main/resourcesdirectory>
                <includes>
                    <include>**/*.propertiesinclude>
                    <include>**/*.xmlinclude>
                includes>
                <filtering>falsefiltering>
            resource>
        resources>
    build>
project>

 

Mybatis-config.xml配置文件:

因为是spring可以完全掌管Mybatis但把mybatis的一些配置留给Mybatis-config比较好

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.hdlf.pojo"/>
    typeAliases>


    <mappers>
        <mapper resource="com/hdlf/mapper/UserMapper.xml"/>
    mappers>
configuration>

 

UserMapper接口：

package com.hdlf.mapper;

import com.hdlf.pojo.User;

import java.util.List;

public interface UserMapper {
    public List getalluser();
}

 

UserMapper.xml配置:

xml version="1.0" encoding="UTF-8" ?>
DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.hdlf.mapper.UserMapper">
    <select id="getalluser" resultType="User">
        select * from mybatis.user
    select>
mapper>

 

User实体类：

package com.hdlf.pojo;

public class User {
    private int id;
    private String name;
    private String pwd;

    public User() {
    }

    public User(int id, String name, String pwd) {
        this.id = id;
        this.name = name;
        this.pwd = pwd;
    }

    public int getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

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

    public String getPwd() {
        return pwd;
    }

    public void setPwd(String pwd) {
        this.pwd = pwd;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", pwd='" + pwd + '\'' +
                '}';
    }
}

 

重点，spring-config.xml配置：

根据官网上可以找到:

DataSource使用spring的数据源可以替换mybatis的配置，需要使用DriverManagerDataSource

sqlSessionFactory绑定mybatis配置文件，重点可以配合mybatis配置文件，而mybatis配置文件可以关联mappers

SqlSessionTemplate就是常用的sqlsession只是封装了，但需要构造器注入，把sqlSessionFactory绑定的配置注入到里面即可

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">

    
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=true&UseUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
    bean>
    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        
        <property name="configLocation" value="classpath:Mybatis-config.xml"/>
    bean>

    
    <bean id="SqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        
        <constructor-arg index="0" ref="sqlSessionFactory">constructor-arg>
    bean>

    <bean id="usermapper" class="com.hdlf.mapper.UserMapperTemplate">
        <property name="SqlSession" ref="SqlSession">property>

    bean>
beans>

 

UserMapperTemplate实现类:

实现Usermapper的方法，封装SqlSessionTemplate，然后用getalluesr返回mapper.getalluser();所有数据

package com.hdlf.mapper;

import com.hdlf.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;

import java.util.List;

public class UserMapperTemplate implements UserMapper {

    private SqlSessionTemplate SqlSession;

    public void setSqlSession(SqlSessionTemplate sqlSession) {
        this.SqlSession = sqlSession;
    }

    public List getalluser() {
        UserMapper mapper = SqlSession.getMapper(UserMapper.class);
        return mapper.getalluser();
    }

}

 

测试类：

不用配置mybatis之类的麻烦的配置

package com.hdlf.test;

import com.hdlf.mapper.UserMapper;
import com.hdlf.pojo.User;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.io.IOException;

public class Mytest {
    public static void main(String[] args) throws IOException {
        ApplicationContext context = new ClassPathXmlApplicationContext("spring-config.xml");
        UserMapper userMapper = context.getBean("usermapper", UserMapper.class);
        for (User user : userMapper.getalluser()) {
            System.out.println(user);

        }


    }
}

 

结果：