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. #\u5B9A\u4E49\u521D\u59CB\u8FDE\u63A5\u6570
6. initialSize=0
7. #\u5B9A\u4E49\u6700\u5927\u8FDE\u63A5\u6570
8. maxActive=20
9. #\u5B9A\u4E49\u6700\u5927\u7A7A\u95F2
10. maxIdle=20
11. #\u5B9A\u4E49\u6700\u5C0F\u7A7A\u95F2
12. minIdle=1
13. #\u5B9A\u4E49\u6700\u957F\u7B49\u5F85\u65F6\u95F4
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：