整合的方式

• 新建 maven 项目

• 引入依赖包

• 配置资源文件

案例实操

新建 maven 项目

新建 maven 项目 spring_mybatis

目录结构如下:

主目录包:

com.xxx.dao、

com.xxx.mapper、

com.xxx.service、

com.xxx.service.impl

测试包：spring_mybatis

引入依赖包

打开 pom.xml 开始添加依赖包

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="xml" contenteditable="false" cid="n26" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(255, 255, 255); position: relative !important; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;"><?xml version="1.0" encoding="UTF-8"?>
​
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
​
<groupId>com.xxx</groupId>
<artifactId>test-xxxms</artifactId>
<version>1.0-SNAPSHOT</version>
​
<name>test-xxxms</name>

<url>http://www.example.com</url>
​
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
​
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
​

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.2.RELEASE</version>
</dependency>
​

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.2.RELEASE</version>
</dependency>
​

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.2.RELEASE</version>
</dependency>
​

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.2.RELEASE</version>
</dependency>
​

<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
​

<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.1</version>
</dependency>
​

<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
​

<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.39</version>
</dependency>
​

<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.2</version>
</dependency>
​
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.2</version>
</dependency>
</dependencies>
​
<build>
<finalName>tpl-web</finalName>
​
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>/.xml</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>/.xml</include>
<include>*/.properties</include>
</includes>
</resource>
</resources>
</build>
</project></pre>

配置资源文件

a) Spring 文件 spring.xml

b) Mybatis 文件 mybatis.xml

c) 数据库连接 properties 文件 db.properties

d) 日志输出文件 log4j.properties

spring.xml 文件配置

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="xml" contenteditable="false" cid="n34" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(255, 255, 255); position: relative !important; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;"><?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.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
​
<context:component-scan base-package="com.xxx"/>
​
<context:property-placeholder location="db.properties"/>
​
<tx:annotation-driven transaction-manager="txManager"/>
​

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="{jdbc.url}"></property>
<property name="user" value="{jdbc.password}"></property>
</bean>
​
<bean id="txManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
​
​

​

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

<property name="dataSource" ref="dataSource"></property>

<property name="configLocation" value="classpath:mybatis.xml" />

<property name="mapperLocations" value="classpath:com/xxx/dao/mapper/*.xml" />
</bean>
​

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

<property name="basePackage" value="com.xxx.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
​
​
</beans></pre>

mybatis.xml 文件配置

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="xml" contenteditable="false" cid="n37" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(255, 255, 255); position: relative !important; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;"><?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
​
<configuration>
​

<typeAliases>
<package name="com.xxx.model"/>
</typeAliases>
​
</configuration>
</pre>

db.properties 文件配置（对于其它数据源属性配置，见 c3p0 配置讲解，这里采用默认属性配置）

建立数据库 mybatis（注意数据库，用户名，密码以自己本地数据库为准 ）

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="xml" contenteditable="false" cid="n41" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(255, 255, 255); position: relative !important; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">jdbc.driver=com.mysql.jdbc.Driver
​
jdbc.url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=
​
utf8
​
jdbc.username=root
​
jdbc.password= </pre>

log4j.properties

便于控制台日志输出

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="xml" contenteditable="false" cid="n44" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(255, 255, 255); position: relative !important; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;"># Global logging configuration
log4j.rootLogger=DEBUG, stdout

Console output...

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n </pre>

扩展

开始编写 helloworld

User 实体类定义

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="java" contenteditable="false" cid="n51" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(255, 255, 255); position: relative !important; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">public class User {
​
private int id;
​
private String userName;
​
private String userPwd;
​
public int getId() {
​
return id;
​
}
​
public void setId(int id) {
​
this.id = id;
​
}
​
public String getUserName() {
​
return userName;
​
}
​
public void setUserName(String userName) {
​
this.userName = userName;
​
}
​
public String getUserPwd() {
​
return userPwd;
​
}
​
public void setUserPwd(String userPwd) {
​
this.userPwd = userPwd;
​
}
​
@Override
​
public String toString() {
​
return "User [id=" + id + ", userName=" + userName + ", userPwd="
​
+ userPwd + "]";
​
}
​
} </pre>

UseDao 接口与映射文件定义

UserDao 接口

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="java" contenteditable="false" cid="n54" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(255, 255, 255); position: relative !important; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">public interface UserDao {
​
public User queryUserById(int id);
​
} </pre>

UserMapper.xml(注意：此时映射文件命名空间定义要符合规则：接口包名.接口类

名,否则不按规则出牌，测试会报错，然后你就蒙圈了！！！)

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="xml" contenteditable="false" cid="n58" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(255, 255, 255); position: relative !important; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;"><?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.xxx.dao.UserDao">
​
<select id="queryUserById" parameterType="int" resultType="user">
​
select id,userName,userPwd from user where id=#{id}
​
</select>
​
</mapper> </pre>

UserService 接口类与实现类定义

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="java" contenteditable="false" cid="n61" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(255, 255, 255); position: relative !important; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">public interface UserService {
​
public User queryUserById();
​
} </pre>

UserServiceImpl 实现类(此时直接注入我们的 UserDao 接口即可，然后直接调用

其方法，事已至此，离成功仅差一步！)

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="java" contenteditable="false" cid="n64" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(255, 255, 255); position: relative !important; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">@Service
​
public class UserServiceImpl implements UserService{
​
@Resource
​
private UserDao userDao;
​
public User queryUserById(){
​
return userDao.queryUserById(7);
​
}
​
} </pre>

junit 测试

因为与 spring 框架集成，我们采用 spring 框架测试 spring Test

<pre spellcheck="false" class="md-fences md-end-block ty-contain-cm modeLoaded" lang="java" contenteditable="false" cid="n67" mdtype="fences" style="box-sizing: border-box; overflow: visible; font-family: var(--monospace); font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; white-space: normal; background-image: inherit; background-position: inherit; background-size: inherit; background-repeat: inherit; background-attachment: inherit; background-origin: inherit; background-clip: inherit; background-color: rgb(255, 255, 255); position: relative !important; width: inherit; color: rgb(51, 51, 51); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">@RunWith(SpringJUnit4ClassRunner.class)
​
@ContextConfiguration(locations = {"classpath:spring.xml"} )
​
public class TestSpringMybatis {
​
@Autowired
​
private UserService userService;
​
@Test
​
public void testQueryUserById() {
​
System.out.println(userService.queryUserById(1));
​
}
​
} </pre>

结果输出