java框架整合Spring与Mybatis，一步步详细讲解

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本教程是为了后续学习SSM，使学习曲线更加平滑而准备的。 用于演示Spring和Mybatis如何整合在一起

 

步骤 1 : 基于Mybatis的课程

本教程基于Mybatis的课程进行, 所以在开始之前希望你建库，表结构，Mybatis的常用用法都已经熟练了。

步骤 2 : pojo

package com.how2java.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;     }     @Override     public String toString() {         return "Category [id=" + id + ", name=" + name + "]";     }       }

步骤 3 : Mapper

package com.how2java.mapper;    import java.util.List; import com.how2java.pojo.Category;    public interface CategoryMapper {        public int add(Category category);               public void delete(int id);               public Category get(int id);             public int update(Category category);                public List<Category> list();           public int count();        }

步骤 4 : Category.xml

Category.xml需要和上一个CategoryMapper类放在同一个包下，并且namespace必须写CategoryMapper

<mapper namespace="com.how2java.mapper.CategoryMapper">

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<?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.how2java.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>

步骤 5 : applicationContext.xml

<context:annotation-config />

 

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">

配置连接数据库的驱动，URL，账号和密码
 

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

扫描XML配置文件
 

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

扫描Mapper类

<?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:jdbc="http://www.springframework.org/schema/jdbc"     xmlns:context="http://www.springframework.org/schema/context"     xmlns:mvc="http://www.springframework.org/schema/mvc"     xsi:schemaLocation="      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd      http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd      http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-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/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd      http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">          <context:annotation-config />          <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">          <property name="driverClassName">              <value>com.mysql.jdbc.Driver</value>          </property>          <property name="url">              <value>jdbc:mysql://localhost:3306/how2java?characterEncoding=UTF-8</value>                </property>          <property name="username">              <value>root</value>          </property>          <property name="password">              <value>admin</value>          </property>      </bean>           <bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">     <property name="typeAliasesPackage" value="com.how2java.pojo" />         <property name="dataSource" ref="dataSource"/>         <property name="mapperLocations" value="classpath:com/how2java/mapper/*.xml"/>     </bean>     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">         <property name="basePackage" value="com.how2java.mapper"/>     </bean>       </beans>

步骤 6 : 测试

使用Spring注解方式测试，拿到注入的CategoryMapper对象，当调用add方法的时候，会自动去找Category.xml里id="add"的sql语句。

package com.java.test; import java.util.List; import org.junit.Test; 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.how2java.mapper.CategoryMapper; import com.how2java.pojo.Category; @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration("classpath:applicationContext.xml") public class MybatisTest {     @Autowired     private CategoryMapper categoryMapper;     @Test     public void testAdd() {         Category category = new Category();         category.setName("new Category");         categoryMapper.add(category);     }     @Test     public void testList() {         System.out.println(categoryMapper);         List<Category> cs=categoryMapper.list();         for (Category c : cs) {             System.out.println(c.getName());         }     } }

步骤 7 : 可运行项目

在下载区(点击进入)有本知识点对应的可运行项目下载 ,实在自己搞不出来，就下载解压出来比较一下。

更多内容，点击了解： https://how2j.cn/k/spring-mybatis/spring-mybatis-tutorial/1134.html?p=81777