Spring+Mybatis

mybatis-spring.jar整合包

MapperFactoryBean元件，封裝了根據Mapper對映器介面生成實現元件的功能

結合

先把包都引入 ioc aop dao dbcp 當然在之前的Mybatis下增加的

當然還有配置檔案

還有引入 mybatis-spring.jar

在Spring配置中

<!-- 可以根據給定的Mapper介面生成實現元件 -->
    <bean id="costDao" class="org.mybatis.spring.mapper.MapperFactoryBean"
 
>
    <property name="mapperInterface" value="dao.CostDao"></property>

    </bean>

實現一個元件就要寫一個這個bean
那個dao.CostDao介面就是之前寫的介面。讓他根據這個介面實現元件

SqlSessionFactoryBean元件，封裝了建立SqlSession

用dbcp的連線池

就是不用MyBatis的配置檔案了。用的dbcp的連線池

即：用這個dbcp連線池的bean

<!-- 定義dbcp的DataSource -->
 


    <bean id="dbcp" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="username" value="root"></property>
    <property name="password" value="root"></property>
    <property name="url" value="jdbc:mysql:///jsd1507db"></property>
    <property
 
 name="driverClassName" value="com.mysql.jdbc.Driver"></property>
    </bean>
    替代：mybatis的配置檔案

   <environments default="development">  
        <environment id="development">  
            <transactionManager type="JDBC" />  
            <dataSource type="POOLED">  
                <property name="driver" value="com.mysql.jdbc.Driver" />  
                <property name="url" value="jdbc:mysql://localhost/jsd1507db" />  
                <property name="username" value="root" />  
                <property name="password" value="root" />  
            </dataSource>  
        </environment>  
    </environments>  

這幾個關係

DataSource(dbcp)
SqlSessionFactoryBean(ssf)
注入dataSource
注入sql定義檔案
MapperFactoryBean(costDAO)
注入sqlsessionfactory
注入CostDao介面

    <!-- 可以根據給定的Mapper介面生成實現元件 -->
    <bean id="costDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
    <property name="mapperInterface" value="dao.CostDao"></property>
    <!-- 指定sqlsession資源 -->
    <property name="sqlSessionFactory" ref="ssf"></property>
    </bean>


    <bean id="ssf" class="org.mybatis.spring.SqlSessionFactoryBean">


    <!-- 注入dataSource    用連線池獲取-->
    <property name="dataSource" ref="dbcp"></property>

    <!-- 注入SQL語句檔案   用*號代替，那麼就可以載入多個xml檔案了 -->

    <property name="mapperLocations" value="classpatch:entity/*.xml"></property>
    </bean>


    <!-- 定義dbcp的DataSource -->

    <bean id="dbcp" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="username" value="root"></property>
    <property name="password" value="root"></property>
    <property name="url" value="jdbc:mysql:///jsd1507db"></property>
    <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
    </bean>

一定要注意！！！！！！！！！！！！

編寫的Mapper介面的名字要和Mapper.xml檔案中的namespace相同才可以

<mapper namespace="dao.CostDao">

要把包也寫上。

利用MapperFactoryBean

主要是配置檔案：

<!-- 可以根據給定的Mapper介面生成實現元件 -->
    <bean id="costDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
    <property name="mapperInterface" value="dao.CostDao"></property>
    <!-- 指定sqlsession資源 -->
    <property name="sqlSessionFactory" ref="ssf"></property>
    </bean>


    <bean id="ssf" class="org.mybatis.spring.SqlSessionFactoryBean">


    <!-- 注入dataSource    用連線池獲取-->
    <property name="dataSource" ref="dbcp"></property>

    <!-- 注入SQL語句檔案   用*號代替，那麼就可以載入多個xml檔案了 -->

    <property name="mapperLocations" value="entity/CostDao.xml"></property>
    </bean>


    <!-- 定義dbcp的DataSource -->

    <bean id="dbcp" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="username" value="root"></property>
    <property name="password" value="root"></property>
    <property name="url" value="jdbc:mysql:///jsd1507db"></property>
    <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
    </bean>

測試類：

package test;

import java.util.List;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import dao.CostDao;
import entity.Cost;

public class TestCostDao {


    public static void main(String[] args){
        String conf ="applicationContext.xml";
        ApplicationContext ac = new ClassPathXmlApplicationContext(conf);

        CostDao costDao = ac.getBean("costDao",CostDao.class);

        List<Cost> list =costDao.findAll();

        for(Cost cost:list){
            System.out.println("name:"+cost.getName());
        }

    }

}

sql語句檔案Mapper

<?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="dao.CostDao">

    <select id="findAll" resultType="entity.Cost">
    select * from cost
    </select>

    <select id="findPage" parameterType="int" resultType="entity.Cost">
    select * from cost limit #{page},5
    </select>

    <select id="findMap" resultType="Map">
    select cost_id,name from cost
    </select>
    </mapper>

MapperScannerConfigurer

這個元件封裝了批量生成Mapper元件的功能
批量為每一個dao生成

如下配置

<!-- 可以根據指定路徑批量生成Dao實現 -->

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <!-- 掃描dao下所有介面，批量生成實現 -->
    <property name="basePackage" value="dao"></property>
    <!-- 自動注入sqlsessionfactory -->

    <property name="sqlSessionFactory" ref="ssf"></property>
    </bean>





    <bean id="ssf" class="org.mybatis.spring.SqlSessionFactoryBean">


    <!-- 注入dataSource    用連線池獲取-->
    <property name="dataSource" ref="dbcp"></property>

    <!-- 注入SQL語句檔案   用*號代替，那麼就可以載入多個xml檔案了 -->

    <property name="mapperLocations" value="entity/CostDao.xml"></property>
    </bean>


    <!-- 定義dbcp的DataSource -->

    <bean id="dbcp" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="username" value="root"></property>
    <property name="password" value="root"></property>
    <property name="url" value="jdbc:mysql:///jsd1507db"></property>
    <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
    </bean>

也會生成一個costDAO元件直接就可以用。測試類就是原來的測試類
    <!-- 若不是想讓全部的dao裡的都實現的話就如下。有定義的註解的才會實現 .沒有就不會實現-->
    <property name="annotationClass" value="dao.annotation.mybatisdao"></property>

即建立個介面的話如果有@mybatisdao 。這個是自己的寫的。就是上面value的值的最後。

Dao介面實現可以是框架欄位給生成。(就是利用如上的兩種方式)
也可以是自己編寫利用 SqlSessionTemplate元件

整合流程、總結

先匯入包：

匯入配置檔案

編寫對應資料庫表的實體類 entity.User

package entity;

import java.io.Serializable;

public class User implements Serializable{
    private Integer id;
    private String username;
    private String pwd;
    private String name;
    private String gender;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getGender() {
        return gender;
    }
    public void setGender(String gender) {
        this.gender = gender;
    }
}

然後編寫SQL檔案

<?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="dao.UserDao">

    <select id="findByName" parameterType="String" resultType="entity.User">
    select * from user where username=#{username}
    </select>


    </mapper>

編寫介面Mapper

package dao;

import entity.User;

public interface UserDao {

    public User findByName(String name);


}

！！！進行配置：

<?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:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util"  
    xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.2.xsd
        http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd
        http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa-1.3.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">

    <!-- 定義dbcp -->
    <bean id="dbcp" class="org.apache.commons.dbcp.BasicDataSource">
    <property name="username" value="root"></property>
    <property name="password" value="root"></property>
    <property name="url" value="jdbc:mysql:///jsd1507db"></property>
    <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
    </bean>


    <bean id="ssf" class="org.mybatis.spring.SqlSessionFactoryBean">
    <!-- 注入dataSource    用連線池獲取-->
    <property name="dataSource" ref="dbcp"></property>

    <!-- 注入SQL語句檔案   用*號代替，那麼就可以載入多個xml檔案了 -->

    <property name="mapperLocations" value="sql/UserDao.xml"></property>
    </bean>



    <bean  class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <!-- 掃描dao下所有介面，批量生成實現 -->
    <property name="basePackage" value="dao"></property>
    <!-- 自動注入sqlsessionfactory -->
    <property name="sqlSessionFactory" ref="ssf"></property>
    </bean>



</beans>

測試類

package test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import dao.UserDao;

import entity.User;

public class TestUserDao {

    public static void main(String[] args){

        String conf ="applicationContext.xml";
        ApplicationContext ac = new ClassPathXmlApplicationContext(conf);


        UserDao userDao = ac.getBean("userDao",UserDao.class);

        User user = userDao.findByName("Recar");
        System.out.println("pwd: "+user.getPwd());

    }

}

一定要注意細節配置。還有 <mapper namespace="dao.UserDao">
的namespace一定要是包加介面名！！！