容易练习使用tk/mybatis/mapper/common/Mapper
项目结构
day02MyBatis/
├── day02MyBatis.iml
├── pom.xml
└── src/
├── main/
│ ├── java/
│ │ └── com/
│ │ └── zhang/
│ │ ├── entity/
│ │ │ ├── Book.java
│ │ │ └── BookType.java
│ │ ├── mapper/
│ │ │ ├── BookMapper.java
│ │ │ ├── BookMapper.xml
│ │ │ ├── BookTypeMapper.java
│ │ │ └── BookTypeMapper.xml
│ │ └── service/
│ │ └── impl/
│ │ └── BookServiceImpl.java
│ └── resources/
│ ├── SqlMapConfig.xml
│ ├── applicationContext.xml
│ ├── db.properties
│ ├── log4j.properties
│ └── generator/
│ ├── generatorConfig.xml
│ └── logback.xml
└── test/
└── java/
└── com/
└── zhang/
└── Test.java该项目是一个基于Spring+MyBatis的 书籍信息管理demo ，主要实现书籍数据的查询功能，使用tk.mybatis.mapper.common.Mapper减少代码量，具体特点如下：
核心功能
数据库交互
- 通过MyBatis实现与MySQL数据库的连接与操作，配置文件为
db.properties - 提供书籍信息的查询功能，通过
getBookList方法获取全部书籍列表
- 通过MyBatis实现与MySQL数据库的连接与操作，配置文件为
技术架构
- Spring框架 ：实现依赖注入和事务管理，配置文件为
applicationContext.xml - MyBatis ：提供ORM映射，通过通用Mapper简化CRUD操作，实体类为
Book.java - 分页支持 ：集成PageHelper插件实现分页查询
- Spring框架 ：实现依赖注入和事务管理，配置文件为
代码结构
- 采用经典的分层架构：Entity(实体层) → Mapper(数据访问层) → Service(业务逻辑层)
- 测试类
Test.java验证查询功能
关键实现
- 通过通用Mapper接口
BookMapper继承基础CRUD方法 - 业务层实现类
BookServiceImpl调用MyBatis查询接口 - Spring事务管理配置确保数据操作的一致性
实体类
@Table(name = "book")
public class Book
{
@Id
@GeneratedValue(generator = "JDBC")
private Integer bookid;
private String bookname;
private Double price;
private Date pubtime;
private String author;
private Integer typeid;
/*忽略get set*/
}
@Table(name = "booktype")
public class BookType
{
@Id
@GeneratedValue(generator = "JDBC")
private Integer typeid;
private String typename;
/*忽略get set*/
}mapper.java
package com.zhang.mapper;
import com.zhang.entity.Book;
import tk.mybatis.mapper.common.Mapper;
public interface BookMapper extends Mapper<
Book> {
}
package com.zhang.mapper;
import com.zhang.entity.BookType;
import tk.mybatis.mapper.common.Mapper;
public interface BookTypeMapper extends Mapper<
BookType> {
}mapper.xml
<?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.zhang.mapper.BookMapper" >
<resultMap id="BaseResultMap" type="com.zhang.entity.Book" >
<!--
WARNING - @mbg.generated
-->
<id column="bookid" property="bookid" jdbcType="INTEGER" />
<result column="bookname" property="bookname" jdbcType="VARCHAR" />
<result column="price" property="price" jdbcType="DOUBLE" />
<result column="pubtime" property="pubtime" jdbcType="DATE" />
<result column="author" property="author" jdbcType="VARCHAR" />
<result column="typeid" property="typeid" jdbcType="INTEGER" />
</resultMap>
</mapper>
<?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.zhang.mapper.BookTypeMapper" >
<resultMap id="BaseResultMap" type="com.zhang.entity.BookType" >
<!--
WARNING - @mbg.generated
-->
<id column="typeid" property="typeid" jdbcType="INTEGER" />
<result column="typename" property="typename" jdbcType="VARCHAR" />
</resultMap>
</mapper>service
import com.zhang.entity.Book;
import java.util.List;
public interface BookService {
List<
Book> getBookList();
}
import com.zhang.entity.Book;
import com.zhang.mapper.BookMapper;
import com.zhang.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class BookServiceImpl
implements BookService {
@Autowired
public BookMapper bookMapper;
@Override
public List<
Book> getBookList() {
return bookMapper.selectAll();
}
}测试类
package com.zhang;
import com.zhang.entity.Book;
import com.zhang.service.BookService;
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 java.util.List;
//学注解点进去看看
@RunWith(SpringJUnit4ClassRunner.class)
//启动spring集成的JUnit测试框架
////加载spring的配置文件
@ContextConfiguration(locations = {
"classpath:applicationContext.xml"
})
public class Test
{
@Autowired
private BookService bookService;
@org.junit.Test
public void getEmpList(){
List<
Book> books = bookService.getBookList();
if (null!=books){
for (Book book : books) {
System.out.println(book);
}
}
}
}配置文件
generatorConfig.xml 生成实体类和mapper
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<!-- 引用外部的数据库的配置属性-->
<properties resource="db.properties"/>
<!--mybatis运行环境-->
<context id="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">
<property name="beginningDelimiter" value="`"/>
<property name="endingDelimiter" value="`"/>
<!--通用mapper的配置-->
<plugin type="tk.mybatis.mapper.generator.MapperPlugin">
<property name="mappers" value="tk.mybatis.mapper.common.Mapper"/>
<property name="caseSensitive" value="true"/>
</plugin>
<!--数据库数据-->
<jdbcConnection driverClass="${jdbc.driver}"
connectionURL="${jdbc.url}"
userId="${jdbc.username}"
password="${jdbc.password}">
</jdbcConnection>
<!--实体类位置-->
<javaModelGenerator targetPackage="com.zhang.entity"
targetProject="src/main/java"/>
<!--XXXMapper.xml-->
<!-- ??-->
<sqlMapGenerator targetPackage="mapper"
targetProject="src/main/java/com/zhang"/>
<!--XXXMapper-->
<javaClientGenerator targetPackage="com.zhang.mapper"
targetProject="src/main/java"
type="XMLMAPPER"/>
<table tableName="Book" domainObjectName="Book">
<!-- 指定表中主键的名字，所以建表的时候要有主键-->
<generatedKey column="bookid" sqlStatement="JDBC"/>
</table>
<table tableName="BookType" domainObjectName="BookType">
<generatedKey column="typeid" sqlStatement="JDBC"/>
</table>
</context>
</generatorConfiguration>logback.xml 日志配置
这里只是到控制台，没配置到文件
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<!--输出日志到控制台-->
<appender name="consoleLog" class="ch.qos.logback.core.ConsoleAppender">
<!--负责把事件转成字符串，格式化日志信息的输出-->
<layout>
<pattern>
<!--%d是日期，%msg是日志消息%n换行-->
[%p]%d-%msg%n
</pattern>
</layout>
</appender>
<appender name="fileLog" class="ch.qos.logback.core.rolling.RollingFileAppender">
<filter class="ch.qos.logback.classic.filter.LevelFilter">
<level>debug</level>
<onMatch>DENY</onMatch>
</filter>
<encoder>
<pattern>
[%p]%d-%msg%n
</pattern>
</encoder>
<!-- 指定文件的输出位置-->
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>
D:/logs/%d.log
</fileNamePattern>
</rollingPolicy>
</appender>
<root level="info">
<appender-ref ref="consoleLog"></appender-ref>
<appender-ref ref="fileLog"></appender-ref>
</root>
</configuration>applicationContext.xml spring mvc的配置bean
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
<!--改成业务层接口所在的包-->
<
context:component-scan base-package="com.zhang.service"></context:component-scan>
<!-- 配置数据库连接池 -->
<!-- 加载配置文件 -->
<
context:property-placeholder location="classpath:db.properties"/>
<!-- 数据库连接池 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
destroy-method="close">
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="driverClassName" value="${jdbc.driver}" />
<property name="maxActive" value="10" />
<property name="minIdle" value="5" />
</bean>
<!-- 配置sqlsessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configLocation" value="classpath:SqlMapConfig.xml"></property>
<property name="dataSource" ref="dataSource"></property>
<!--修改的位置，实体类的包-->
<property name="typeAliasesPackage" value="com.zhang.entity"></property>
<!--修改的位置，DAO映射配置文件的包-->
<property name="mapperLocations" value="classpath:com/zhang/mapper/*.xml"></property>
</bean>
<!-- 配置扫描包，加载mapper代理对象 -->
<bean class="tk.mybatis.spring.mapper.MapperScannerConfigurer">
<!--修改的位置，Mapper接口的包-->
<property name="basePackage" value="com.zhang.mapper"></property>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!-- 数据源 -->
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 通知 -->
<
tx:advice id="txAdvice" transaction-manager="transactionManager">
<
tx:attributes>
<!-- 传播行为 -->
<
tx:method name="save*" propagation="REQUIRED"/>
<
tx:method name="insert*" propagation="REQUIRED"/>
<
tx:method name="add*" propagation="REQUIRED"/>
<
tx:method name="create*" propagation="REQUIRED"/>
<
tx:method name="delete*" propagation="REQUIRED"/>
<
tx:method name="update*" propagation="REQUIRED"/>
<
tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
<
tx:method name="select*" propagation="SUPPORTS" read-only="true"/>
<
tx:method name="get*" propagation="SUPPORTS" read-only="true"/>
</tx:attributes>
</tx:advice>
<!-- 切面 -->
<
aop:config>
<
aop:advisor advice-ref="txAdvice" pointcut="execution(* com.zhang.service.*.*(..))"/>
</aop:config>
</beans>db.properties 数据库连接信息
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test?characterEncoding=utf-8
jdbc.username=root
jdbc.password=1234log4j.properties 日志信息配置
log4j.rootLogger=DEBUG, Console
#Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
log4j.logger.java.sql.ResultSet=INFO
log4j.logger.org.apache=INFO
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUGSqlMapConfig.xml 分页插件配置
<?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>
<settings>
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
<plugins>
<!-- 配置分页插件 -->
<plugin interceptor="com.github.pagehelper.PageInterceptor">
<property name="reasonable" value="true"/>
</plugin>
</plugins>
</configuration>pom.xml
<?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.zhang</groupId>
<artifactId>day02MyBatis</artifactId>
<version>1.0-SNAPSHOT</version>
<name>day02MyBatis</name>
<!-- FIXME change it to the project's website -->
<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>
<jdk.version>1.7</jdk.version>
<junit.version>4.12</junit.version>
<spring.version>4.2.4.RELEASE</spring.version>
<mybatis.version>3.2.8</mybatis.version>
<mybatis.spring.version>1.2.2</mybatis.spring.version>
<mybatis.paginator.version>1.2.15</mybatis.paginator.version>
<tk.mybatis.version>4.0.4</tk.mybatis.version>
<mysql.version>8.0.33</mysql.version>
<slf4j.version>1.6.4</slf4j.version>
<jackson.version>2.4.2</jackson.version>
<druid.version>1.0.9</druid.version>
<jstl.version>1.2</jstl.version>
<servlet-api.version>2.5</servlet-api.version>
<jsp-api.version>2.0</jsp-api.version>
<commons-lang3.version>3.3.2</commons-lang3.version>
<commons-io.version>1.3.2</commons-io.version>
<commons-net.version>3.3</commons-net.version>
<pagehelper.version>5.1.2</pagehelper.version>
<commons-fileupload.version>1.3.1</commons-fileupload.version>
</properties>
<dependencies>
<!-- Apache工具组件 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependency>
<groupId>commons-net</groupId>
<artifactId>commons-net</artifactId>
<version>${commons-net.version}</version>
</dependency>
<!-- Jackson Json处理工具包 -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- 单元测试 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<!-- 日志处理 -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- Mybatis框架 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!--spring整合Mybatis的插件-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!-- 通用Mapper -->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>${tk.mybatis.version}</version>
</dependency>
<!-- 分页插件 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>${pagehelper.version}</version>
</dependency>
<!-- MySql数据库 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- 阿里巴巴连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<!-- Spring支持 -->
<!-- IOC容器 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 扩展IOC容器，添加任务调度 邮件服务等 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- spring mvc框架 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- spring context的扩展，用于mvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- spring jdbc的简单封装 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 面向切面编程 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 测试 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- JSP相关 -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>${servlet-api.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>${jsp-api.version}</version>
<scope>provided</scope>
<exclusions>
<exclusion>
<artifactId>servlet-api</artifactId>
<groupId>javax.servlet</groupId>
</exclusion>
</exclusions>
</dependency>
<!-- 文件上传组件 -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>${commons-fileupload.version}</version>
<exclusions>
<exclusion>
<artifactId>commons-io</artifactId>
<groupId>commons-io</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${commons-io.version}</version>
</dependency>
</dependencies>
<build>
<finalName>booksys</finalName>
<plugins>
<!--tomcat的插件-->
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>/</path>
<port>8080</port>
</configuration>
</plugin>
<!--maven编译的插件-->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>${jdk.version}</source>
<target>${jdk.version}</target>
</configuration>
</plugin>
<!--通用mapper的插件-->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<configurationFile>
<!--自动生成代码的配置文件-->
${basedir}/src/main/resources/generator/generatorConfig.xml
</configurationFile>
<overwrite>true</overwrite>
<verbose>true</verbose>
</configuration>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>${tk.mybatis.version}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
<!--资源文件打包的配置信息-->
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.*</include>
</includes>
</resource>
</resources>
</build>
</project>
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