笔记60 Spring+Mybatis整合

整合思路：将SessionFactory交给Spring管理，并且把Mapper和XML结合起来使用。

一、目录结构

二、基本的pojo

Category.java

package com.pojo;

public class Category {
    private int id;
    private String name;

    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 toString() {
        return "Category [id=" + id + ", name=" + name + "]";
    }
}

三、Mapper

在这里使用动态SQL语句，需要新增CategoryDynaSqlProvider，提供CRUD对应的SQL语句。

CategoryMapper.java

package com.mapper;

import java.util.List;

import org.apache.ibatis.annotations.DeleteProvider;
import org.apache.ibatis.annotations.InsertProvider;
import org.apache.ibatis.annotations.SelectProvider;
import org.apache.ibatis.annotations.UpdateProvider;

import com.dynasql.CategoryDynaSqlProvider;
import com.pojo.Category;

public interface CategoryMapper {
    @InsertProvider(type = CategoryDynaSqlProvider.class, method = "add")
    public int add(Category category);

    @DeleteProvider(type = CategoryDynaSqlProvider.class, method = "delete")
    public void delete(int id);

    @SelectProvider(type = CategoryDynaSqlProvider.class, method = "get")
    public Category get(int id);

    @UpdateProvider(type = CategoryDynaSqlProvider.class, method = "update")
    public int update(Category category);

    @SelectProvider(type = CategoryDynaSqlProvider.class, method = "list")
    public List<Category> list();

}

四、CategoryDynaSqlProvider.java

package com.dynasql;

import org.apache.ibatis.jdbc.SQL;

public class CategoryDynaSqlProvider {
    public String list() {
        return new SQL().SELECT("*").FROM("category").toString();
    }

    public String get() {
        return new SQL().SELECT("*").FROM("category").WHERE("id=#{id}").toString();
    }

    public String add() {
        return new SQL().INSERT_INTO("category").VALUES("name", "#{name}").toString();
    }

    public String update() {
        return new SQL().UPDATE("category").SET("name=#{name}").WHERE("id=#{id}").toString();
    }

    public String delete() {
        return new SQL().DELETE_FROM("category").WHERE("id=#{id}").toString();
    }
}

或者直接采用xml的方式进行配置：Category.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.mapper.CategoryMapper">
    <insert id="add" parameterType="Category">
        insert into category ( name ) values (#{name})
    </insert>

    <delete id="delete" parameterType="Category">
        delete from category where id= #{id}
    </delete>

    <select id="get" parameterType="_int" resultType="Category">
        select * from category where id= #{id}
    </select>

    <update id="update" parameterType="Category">
        update category set name=#{name} where id=#{id}
    </update>
    <select id="list" resultType="Category">
        select * from category
    </select>
</mapper>

五、applicationContext.xml

1.识别注解

<context:annotation-config></context:annotation-config>

2.配置数据源

<bean name="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url"
            value="jdbc:mysql://localhost:3306/sh?characterEncoding=UTF-8"></property>
        <property name="username" value="root"></property>
        <property name="password" value="123456"></property>
8 </bean>

3.配置Mybatis的SqlSessionFactory bean，扫描基本的pojo包、加载数据源、扫描配置xml配置文件（如果使用SQL动态语句，这一步可省略）

    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="typeAliasesPackage" value="com.pojo" />
        <property name="dataSource" ref="dataSource" />
        <property name="mapperLocations" value="classpath:com/mapper/*.xml"/>
    </bean>

4.扫描Mapper类

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.mapper" />
</bean>

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" xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
   http://www.springframework.org/schema/beans
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/aop
   http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
   http://www.springframework.org/schema/tx
   http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
   http://www.springframework.org/schema/context     
   http://www.springframework.org/schema/context/spring-context-3.0.xsd">


    <context:annotation-config></context:annotation-config>

    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="typeAliasesPackage" value="com.pojo" />
        <property name="dataSource" ref="dataSource" />
        
    </bean>

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.mapper" />
    </bean>
    <!-- 配置数据源 -->
    <bean name="dataSource"
        class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url"
            value="jdbc:mysql://localhost:3306/sh?characterEncoding=UTF-8"></property>
        <property name="username" value="root"></property>
        <property name="password" value="123456"></property>
    </bean>
</beans>

六、测试

package com.test;

import java.util.List;

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 com.mapper.CategoryMapper;
import com.pojo.Category;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class Test {

    @Autowired
    private CategoryMapper categoryMapper;

    @org.junit.Test
    public void testAdd() {
        Category category = new Category();
        category.setName("new Category");
        categoryMapper.add(category);
    }

    @org.junit.Test
    public void testList() {
        System.out.println(categoryMapper);
        List<Category> cs = categoryMapper.list();
        for (Category c : cs) {
            System.out.println(c.getName());
        }
    }
}