簡單的mybatis——spring 整合（數據庫：oracle）

剛剛開始學，mybatis，怕自己忘記基礎，趕緊記錄了下來，歡迎各位大神指錯！

 

mybatis所需的jar包:mybatis-3.4.2.jar

mybatis與spring整合中需要的jar包：mybatis-spring-1.3.1.jar

其他jar包就找自己的需求來添加:比如oracle的驅動包，spring需要的相應的包

 

注：雖然配置文件里寫了：增刪改查，但是測試只測試查詢所有，其他的自己進行測試了哈

大概思路：

首先：創建數據，建表，插入測試數據

再而：創建與表相對應的實體類

下一步：在接口中定義一些數據訪問的方法 

進一步：為MyBatis ORM創建的xml映射文件定義實現數據訪問需要的sql腳本

最后：使用spring.xml完成整合，進行小測試

 

建表，插數據

CREATE TABLE books(bid NUMBER PRIMARY KEY ,bname VARCHAR2(50) NOT NULL ,bprice NUMBER NOT NULL );

INSERT  INTO books(bid,bname,bprice) VALUES (1,'百鬼夜行',12.5);
INSERT  INTO books(bid,bname,bprice) VALUES (2,'陌上花開',22.5);
INSERT  INTO books(bid,bname,bprice) VALUES (3,'夏目友人帳',32.5);

創建實體類　　

package edu.nf.mybatis.entity;

/**
 * Created by Administrator on 2017/3/27.
 */
public class Books {
    private long bid;
    private String bname;
    private double bprice;

    public Books() {
    }

    public Books(long bid, String bname, double bprice) {
        this.bid = bid;
        this.bname = bname;
        this.bprice = bprice;
    }

    public long getBid() {
        return bid;
    }

    public void setBid(long bid) {
        this.bid = bid;
    }

    public String getBname() {
        return bname;
    }

    public void setBname(String bname) {
        this.bname = bname;
    }

    public double getBprice() {
        return bprice;
    }

    public void setBprice(double bprice) {
        this.bprice = bprice;
    }

    @Override
    public String toString() {
        return "Books{" +
                "bid=" + bid +
                ", bname='" + bname + '\'' +
                ", bprice=" + bprice +
                '}';
    }
}

定義訪問接口

package edu.nf.mybatis.mapper;

import edu.nf.mybatis.entity.Books;
import org.apache.ibatis.annotations.Param;

import java.util.List;

/**
 * Created by Administrator on 2017/3/27.
 * 圖書數據訪問的接口
 */

public interface IBookDao {

    /*獲取所有書籍*/
    public List<Books> getAll();
    /*通過ID獲取單個數據*/
    public Books getBookById(@Param("bid") int bid);
    /*添加數據*/
    public int add(Books entity);
    /*根據ID刪除*/
    public int del(int bid);
    /*更新*/
    public int update(Books entity);

}

創建xml映射文件定義實現數據訪問需要的sql腳本

<?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">
<!--命名空間應該是對應接口的包名+接口名-->
<mapper namespace="edu.nf.mybatis.mapper.IBookDao">
    <!--id應該是對應接口的包名+接口名-->
    <!--獲取所有書籍-->
    <!--因為在spring.xml文件中的sqlSessionFactory中配置屬性 <property name="typeAliasesPackage" value="edu.nf.mybatis.entity"></property>-->
    <!--所以這里resultType="Books"就只需要寫類名Books，而不是edu.nf.mybatis.entity.Books了-->
    <select id="getAll" resultType="Books">
        select bid,bname,bprice from books
    </select>
    <!--通過編號獲取書籍-->
    <select id="getBookById" resultType="Books">
        select bid,bname,bprice from books where bid = #{bid};
    </select>
    <!--添加書籍-->
    <insert id="add">
        insert into books(bid,bname,bprice) values (#{bid},#{bname},#{bprice});
    </insert>
    <!--刪除書籍-->
    <delete id="del">
        delete from books where bid = #{bid};
    </delete>

    <!--更新書籍-->
    <update id="update">
        update books set bid = #{bid},bname = #{bname},bprice = #{bprice} where bid = #{bid};
    </update>
</mapper>

spring.xml完成整合，進行小測試

<?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:tx="http://www.springframework.org/schema/tx"
       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-4.3.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">

    <!--1 引入屬性文件，在配置中占位使用 -->
    <context:property-placeholder location="classpath:db.properties" />

    <!--6 容器自動掃描IOC組件  -->
    <context:component-scan base-package="edu.nf.mybatis"/>

    <!--2 配置C3P0數據源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
        <!--驅動類名 -->
        <property name="driverClass" value="${driver}" />
        <!-- url -->
        <property name="jdbcUrl" value="${url}" />
        <!-- 用戶名 -->
        <property name="user" value="${user}" />
        <!-- 密碼 -->
        <property name="password" value="${password}" />
    </bean>

    <!--3 會話工廠bean sqlSessionFactoryBean -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 數據源 -->
        <property name="dataSource" ref="dataSource"></property>
        <!-- 配置這里后在bookMapper.xml文件中，sql語句返回的類型就不許寫全路徑，直接寫類名就好了-->
        <property name="typeAliasesPackage" value="edu.nf.mybatis.entity"></property>
        <!-- sql映射文件路徑 -->
        <property name="mapperLocations" value="classpath:mybatis/*.xml"></property>
    </bean>

    <bean  class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 指定要自動掃描接口的基礎包，實現接口 -->
        <property name="basePackage" value="edu.nf.mybatis.mapper" />
    </bean>

    <!--5 聲明式事務管理 -->
    <!--定義事物管理器，由spring管理事務 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--支持注解驅動的事務管理，指定事務管理器 -->
    <tx:annotation-driven transaction-manager="transactionManager"/>

</beans>

import edu.nf.mybatis.entity.Books;
import edu.nf.mybatis.sevice.BooksService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.util.List;

/**
 * Created by Administrator on 2017/3/27.
 */
public class testMybatis {
    @Test
    public void test2(){
        ApplicationContext ctx=new ClassPathXmlApplicationContext("spring.xml");
        BooksService booksService=ctx.getBean(BooksService.class);
        List<Books> books=booksService.getAll();
        System.out.println(books);
    }
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- 配置路徑，默認是 "WEB-INF/applicationContext.xml" -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring.xml</param-value>
    </context-param>
    <servlet-mapping>
        <servlet-name>myBatis</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

 test2測試運行結果：