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  • Spring mvc 搭建Mybatis

    本文建立在spring mvc已经搭建起来的基础上。

    首先看要引入的jar包，其中高亮的是为了mybatis新引入的。

    1. <properties>
    2.       <spring.webmvc.version>4.3.0.RELEASE</spring.webmvc.version>
    3.       <junit.version>4.8.2</junit.version>
    4.       <jedis.version>2.8.1</jedis.version>
    5.       <log4j.version>1.2.16</log4j.version>
    6.       <slf4j.version>1.7.2</slf4j.version>
    7.       <spring.data.redis.version>1.7.2.RELEASE</spring.data.redis.version>
    8.       <spring.data.mongodb.version>1.8.0.RELEASE</spring.data.mongodb.version>
    9.       <mybatis.version>3.2.0</mybatis.version>
    10.       <dbcp.version>1.2.2</dbcp.version>
    11.    </properties>
    12.  
    13.  
    14.  
    15.    <dependencies>
    16.       <dependency>
    17.          <groupId>junit</groupId>
    18.          <artifactId>junit</artifactId>
    19.          <version>${junit.version}</version>
    20.          <scope>test</scope>
    21.       </dependency>
    22.       <dependency>
    23.          <groupId>org.springframework</groupId>
    24.          <artifactId>spring-webmvc</artifactId>
    25.          <version>${spring.webmvc.version}</version>
    26.       </dependency>
    27.       <dependency>
    28.          <groupId>redis.clients</groupId>
    29.          <artifactId>jedis</artifactId>
    30.          <version>${jedis.version}</version>
    31.       </dependency>
    32.       <dependency>
    33.          <groupId>org.springframework.data</groupId>
    34.          <artifactId>spring-data-redis</artifactId>
    35.          <version>${spring.data.redis.version}</version>
    36.       </dependency>
    37.       <dependency>
    38.          <groupId>org.springframework.data</groupId>
    39.          <artifactId>spring-data-mongodb</artifactId>
    40.          <version>${spring.data.mongodb.version}</version>
    41.       </dependency>
    42.  
    43.  
    44.  
    45.  
    46.       <dependency>
    47.          <groupId>log4j</groupId>
    48.          <artifactId>log4j</artifactId>
    49.          <version>${log4j.version}</version>
    50.       </dependency>
    51.       <dependency>
    52.          <groupId>org.slf4j</groupId>
    53.          <artifactId>slf4j-api</artifactId>
    54.          <version>${slf4j.version}</version>
    55.       </dependency>
    56.       <dependency>
    57.          <groupId>org.slf4j</groupId>
    58.          <artifactId>slf4j-log4j12</artifactId>
    59.          <version>${slf4j.version}</version>
    60.       </dependency>
    61.  
    62.       <dependency>
    63.          <groupId>org.mybatis</groupId>
    64.          <artifactId>mybatis</artifactId>
    65.          <version>${mybatis.version}</version>
    66.       </dependency>
    67.  
    68.       <dependency>
    69.          <groupId>org.mybatis</groupId>
    70.          <artifactId>mybatis-spring</artifactId>
    71.          <version>1.2.2</version>
    72.       </dependency>
    73.  
    74.  
    75.       <dependency>
    76.          <groupId>mysql</groupId>
    77.          <artifactId>mysql-connector-java</artifactId>
    78.          <version>5.1.30</version>
    79.       </dependency>
    80.  
    81.       <dependency>
    82.          <groupId>commons-dbcp</groupId>
    83.          <artifactId>commons-dbcp</artifactId>
    84.          <version>${dbcp.version}</version>
    85.       </dependency>
    86.  
    87.       <dependency>
    88.          <groupId>org.springframework</groupId>
    89.          <artifactId>spring-jdbc</artifactId>
    90.          <version>${spring.webmvc.version}</version>
    91.       </dependency>
    92.  
    93.       <dependency>
    94.          <groupId>com.fasterxml.jackson.core</groupId>
    95.          <artifactId>jackson-core</artifactId>
    96.          <version>2.4.3</version>
    97.       </dependency>
    98.  
    99.       <dependency>
    100.          <groupId>com.fasterxml.jackson.core</groupId>
    101.          <artifactId>jackson-databind</artifactId>
    102.          <version>2.4.3</version>
    103.       </dependency>
    104.  
    105.    </dependencies>

    jdbc.properties：

    1. driver=com.mysql.jdbc.Driver
    2. url=jdbc:mysql://192.168.1.101:3306/test
    3. username=root
    4. password=root
    5. #u5B9Au4E49u521Du59CBu8FDEu63A5u6570
    6. initialSize=0
    7. #u5B9Au4E49u6700u5927u8FDEu63A5u6570
    8. maxActive=20
    9. #u5B9Au4E49u6700u5927u7A7Au95F2
    10. maxIdle=20
    11. #u5B9Au4E49u6700u5C0Fu7A7Au95F2
    12. minIdle=1
    13. #u5B9Au4E49u6700u957Fu7B49u5F85u65F6u95F4
    14. maxWait=60000

    mybatis.xml

    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <beans xmlns="http://www.springframework.org/schema/beans"
    3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
    4.     xmlns:context="http://www.springframework.org/schema/context"
    5.     xmlns:mvc="http://www.springframework.org/schema/mvc"
    6.     xmlns:cache="http://www.springframework.org/schema/cache"
    7.     xsi:schemaLocation="http://www.springframework.org/schema/beans
    8.                         http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
    9.                         http://www.springframework.org/schema/context
    10.                         http://www.springframework.org/schema/context/spring-context-4.2.xsd
    11.                         http://www.springframework.org/schema/mvc
    12.                         http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
    13.                         http://www.springframework.org/schema/cache
    14.                         http://www.springframework.org/schema/cache/spring-cache-4.2.xsd ">
    15.  
    16.  
    17.     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
    18.         destroy-method="close">
    19.         <property name="driverClassName" value="${driver}" />
    20.         <property name="url" value="${url}" />
    21.         <property name="username" value="${username}" />
    22.         <property name="password" value="${password}" />
    23.         <!-- 初始化连接大小 -->
    24.         <property name="initialSize" value="${initialSize}"></property>
    25.         <!-- 连接池最大数量 -->
    26.         <property name="maxActive" value="${maxActive}"></property>
    27.         <!-- 连接池最大空闲 -->
    28.         <property name="maxIdle" value="${maxIdle}"></property>
    29.         <!-- 连接池最小空闲 -->
    30.         <property name="minIdle" value="${minIdle}"></property>
    31.         <!-- 获取连接最大等待时间 -->
    32.         <property name="maxWait" value="${maxWait}"></property>
    33.     </bean>
    34.  
    35.     <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
    36.     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    37.         <property name="dataSource" ref="dataSource" />
    38.         <!-- 自动扫描mapping.xml文件 -->
    39.         <property name="mapperLocations" value="classpath:com/zjf/**/mybatis_*.xml"></property>
    40.     </bean>
    41.  
    42.     <!-- DAO接口所在包名，Spring会自动查找其下的类 -->
    43.     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    44.         <property name="basePackage" value="com.zjf" />
    45.         <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    46.     </bean>
    47.  
    48.     <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
    49.     <bean id="transactionManager"
    50.         class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    51.         <property name="dataSource" ref="dataSource" />
    52.     </bean>
    53.  
    54. </beans>

    java代码目录结构：

    注意：这里没有dao的impl，因为Mybatis会根据mapper.xml去创建一个impl。也就是说，mapper.xml就一个一个impl。

    PersonController.java：

    1. package com.zjf.spring.mybatis;
    2.  
    3. import org.springframework.beans.factory.annotation.Autowired;
    4. import org.springframework.stereotype.Controller;
    5. import org.springframework.web.bind.annotation.PathVariable;
    6. import org.springframework.web.bind.annotation.RequestMapping;
    7. import org.springframework.web.bind.annotation.RequestParam;
    8. import org.springframework.web.bind.annotation.ResponseBody;
    9.  
    10. import com.zjf.spring.mybatis.model.Person;
    11. import com.zjf.spring.mybatis.service.IPersonService;
    12.  
    13. @Controller
    14. @RequestMapping("person")
    15. public class PersonController {
    16.  
    17.    @Autowired
    18.    private IPersonService personService;
    19.    @RequestMapping(value="/get/{id}")
    20.    public @ResponseBody Person get(@PathVariable Integer id)
    21.    {
    22.       Person person = personService.getPersonById(id);
    23.       return person;
    24.    }
    25. }

    PersonServiceImpl.java：

    1. package com.zjf.spring.mybatis.service.impl;
    2.  
    3. import org.springframework.beans.factory.annotation.Autowired;
    4. import org.springframework.stereotype.Service;
    5.  
    6. import com.zjf.spring.mybatis.dao.IPersonDao;
    7. import com.zjf.spring.mybatis.model.Person;
    8. import com.zjf.spring.mybatis.service.IPersonService;
    9.  
    10. @Service(value="personService")
    11. public class PersonServiceImpl implements IPersonService {
    12.  
    13.    @Autowired
    14.    private IPersonDao personDao;
    15.  
    16.    public Person getPersonById(Integer id) {
    17.       // TODO Auto-generated method stub
    18.       return personDao.selectByPrimaryKey(id);
    19.    }
    20.  
    21. }

    IPersonDao.java

    1. package com.zjf.spring.mybatis.dao;
    2.  
    3. import com.zjf.spring.mybatis.model.Person;
    4.  
    5. public interface IPersonDao {
    6.  
    7.     int deleteByPrimaryKey(Integer id);
    8.  
    9.     int insert(Person record);
    10.  
    11.     int insertSelective(Person record);
    12.  
    13.     Person selectByPrimaryKey(Integer id);
    14.  
    15.     int updateByPrimaryKeySelective(Person record);
    16.  
    17.     int updateByPrimaryKey(Person record);
    18. }

    Person.java：

    1. package com.zjf.spring.mybatis.model;
    2.  
    3. public class Person {
    4.     private Integer id;
    5.  
    6.     private String name;
    7.  
    8.     private Integer age;
    9.  
    10.     private String address;
    11.  
    12.     public Integer getId() {
    13.         return id;
    14.     }
    15.  
    16.     public void setId(Integer id) {
    17.         this.id = id;
    18.     }
    19.  
    20.     public String getName() {
    21.         return name;
    22.     }
    23.  
    24.     public void setName(String name) {
    25.         this.name = name == null ? null : name.trim();
    26.     }
    27.  
    28.     public Integer getAge() {
    29.         return age;
    30.     }
    31.  
    32.     public void setAge(Integer age) {
    33.         this.age = age;
    34.     }
    35.  
    36.     public String getAddress() {
    37.         return address;
    38.     }
    39.  
    40.     public void setAddress(String address) {
    41.         this.address = address == null ? null : address.trim();
    42.     }
    43.  
    44.  
    45. }

    mybatis_PersonMapper.xml：

    1. <?xml version="1.0" encoding="UTF-8" ?>
    2. <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
    3. <mapper namespace="com.zjf.spring.mybatis.dao.IPersonDao" >
    4.   <resultMap id="BaseResultMap" type="com.zjf.spring.mybatis.model.Person" >
    5.     <id column="id" property="id" jdbcType="INTEGER" />
    6.     <result column="name" property="name" jdbcType="VARCHAR" />
    7.     <result column="age" property="age" jdbcType="INTEGER" />
    8.     <result column="address" property="address" jdbcType="VARCHAR" />
    9.   </resultMap>
    10.   <sql id="Base_Column_List" >
    11.     id, name, age, address
    12.   </sql>
    13.   <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
    14.     select
    15.     <include refid="Base_Column_List" />
    16.     from t_person
    17.     where id = #{id,jdbcType=INTEGER}
    18.   </select>
    19.   <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
    20.     delete from t_person
    21.     where id = #{id,jdbcType=INTEGER}
    22.   </delete>
    23.   <insert id="insert" parameterType="com.zjf.spring.mybatis.model.Person" >
    24.     insert into t_person (id, name, age,
    25.       address)
    26.     values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{age,jdbcType=INTEGER},
    27.       #{address,jdbcType=VARCHAR})
    28.   </insert>
    29.   <insert id="insertSelective" parameterType="com.zjf.spring.mybatis.model.Person" >
    30.     insert into t_person
    31.     <trim prefix="(" suffix=")" suffixOverrides="," >
    32.       <if test="id != null" >
    33.         id,
    34.       </if>
    35.       <if test="name != null" >
    36.         name,
    37.       </if>
    38.       <if test="age != null" >
    39.         age,
    40.       </if>
    41.       <if test="address != null" >
    42.         address,
    43.       </if>
    44.     </trim>
    45.     <trim prefix="values (" suffix=")" suffixOverrides="," >
    46.       <if test="id != null" >
    47.         #{id,jdbcType=INTEGER},
    48.       </if>
    49.       <if test="name != null" >
    50.         #{name,jdbcType=VARCHAR},
    51.       </if>
    52.       <if test="age != null" >
    53.         #{age,jdbcType=INTEGER},
    54.       </if>
    55.       <if test="address != null" >
    56.         #{address,jdbcType=VARCHAR},
    57.       </if>
    58.     </trim>
    59.   </insert>
    60.   <update id="updateByPrimaryKeySelective" parameterType="com.zjf.spring.mybatis.model.Person" >
    61.     update t_person
    62.     <set >
    63.       <if test="name != null" >
    64.         name = #{name,jdbcType=VARCHAR},
    65.       </if>
    66.       <if test="age != null" >
    67.         age = #{age,jdbcType=INTEGER},
    68.       </if>
    69.       <if test="address != null" >
    70.         address = #{address,jdbcType=VARCHAR},
    71.       </if>
    72.     </set>
    73.     where id = #{id,jdbcType=INTEGER}
    74.   </update>
    75.   <update id="updateByPrimaryKey" parameterType="com.zjf.spring.mybatis.model.Person" >
    76.     update t_person
    77.     set name = #{name,jdbcType=VARCHAR},
    78.       age = #{age,jdbcType=INTEGER},
    79.       address = #{address,jdbcType=VARCHAR}
    80.     where id = #{id,jdbcType=INTEGER}
    81.   </update>
    82. </mapper>

    注：mybatis_PersonMapper.xml中的配置将会映射成它配置的namespace接口的实现，然后每个节点（update select insert）都对应一个接口的方法。名字要与接口的方法名字一致。

    最终效果：
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  • 原文地址：https://www.cnblogs.com/xiaolang8762400/p/7010221.html
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