SSM框架_V2
更新于(2018-7-14 20:33:35)
1、动机
SSM(Spring+SpringMVC+MyBatis)框架集由Spring、SpringMVC、MyBatis三个开源框架整合而成。
不知不觉学了SSM框架已经三个多月了，回顾之前整合的文章，发现了很多不足，有很多可以改进的地方。因此抽出了一天时间重新整理SSM框架整合笔记。
基础版已满足入门需求，说明也很详细，但实际项目中可能还需要其他插件支持，使我们的工作效率更高，这里重点介绍Mybatis的几款优秀插件，分别是： 通用Mapper 、 分页插件PageHelper 和 自动生成代码Mybatis-Generator，并运用到我的项目中。
SSM框架_V2 - [进阶版] 因此诞生！
项目地址：https://gitee.com/qq343509740/SSM_Final/tree/master/SSM_Final_V2
2、搭建
Maven创建web项目：https://blog.csdn.net/q343509740/article/details/79509261
3、部分代码
请参考 SSM框架_V1：https://blog.csdn.net/q343509740/article/details/81044611
4、改动部分
4.1、pom.xml
添加 Mapper 、 PageHelper 和 Mybatis-Generator 依赖
<?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> <!-- 指定当前POM模型的版本 -->
<groupId>com.ray</groupId> <!-- 前面设置的GroupId -->
<artifactId>SSM_Final_V2</artifactId> <!-- 前面设置的artifactId-->
<version>1.0-SNAPSHOT</version> <!-- 版本号 -->
<packaging>war</packaging> <!-- 打包方式-war -->
<name>SSM_Final_V2 Maven Webapp</name> <!-- 显示名字 -->
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<!--
配置可变版本号,也就是常说的版本管理
要针对某个依赖进行升级的时候只需要更改下面对应的版本号即可
-->
<properties>
<mysql.version>5.0.8</mysql.version> <!-- Mysql -->
<druid.version>1.1.10</druid.version> <!--Druid -->
<mybatis.version>3.4.1</mybatis.version> <!-- MyBatis -->
<mybatis_spring.version>1.3.0</mybatis_spring.version>
<mapper.version>4.0.0</mapper.version> <!--Mapper-->
<generator.version>1.3.5</generator.version> <!--Generator-->
<pagehelper.version>5.0.0</pagehelper.version> <!-- PageHelper -->
<spring.version>4.3.2.RELEASE</spring.version> <!-- Spring -->
<javax.servlet.version>3.1.0</javax.servlet.version> <!-- Servlet -->
<log4j.version>2.11.0</log4j.version> <!-- Log4j2 -->
<slf4j.version>1.7.25</slf4j.version> <!-- slf4j -->
<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>
<!-- 远程依赖库 -->
<dependencies>
<!-- Junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<!-- 测试时加载 -->
<scope>test</scope>
</dependency>
<!-- Mysql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
<!-- 运行时加载 -->
<scope>runtime</scope>
</dependency>
<!--Druid -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<!-- MyBatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis_spring.version}</version>
</dependency>
<!-- Mapper(可选) -->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>${mapper.version}</version>
</dependency>
<!-- Mybatis-Generator(可选) -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>${generator.version}</version>
</dependency>
<!-- PageHelper(可选） -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>${pagehelper.version}</version>
</dependency>
<!-- Spring -->
<!-- 1)Spring Core -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 2)Spring DAO -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 3)Spring Web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 4)Spring Test -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 5)Spring Aspect -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- Servlet -->
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${javax.servlet.version}</version>
</dependency>
<!-- Log4j2 -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j.version}</version>
</dependency>
<!--Log4j2和slf4j桥接-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>${log4j.version}</version>
</dependency>
<!-- slf4j -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
</dependencies>
<build>
<finalName>SSM_Final_V2</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<!-- Mybatis-Generator 配置(可选) -->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>${generator.version}</version>
<configuration>
<!-- 允许移动生成的文件 -->
<verbose>true</verbose>
<!-- 是否覆盖 -->
<overwrite>true</overwrite>
<!-- 配置文件位置-->
<configurationFile>src/main/resources/mybatis/generatorConfig.xml</configurationFile>
</configuration>
<!--
使用Maven Mybatis插件
如果不在plugin里面添加依赖包的话，会找不到相关的jar包
-->
<dependencies>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>${mapper.version}</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.0.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.20.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.0</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
4.2、web.xml
1）替换404页面，使页面更友善（自行添加404.html）。
2）Durid 添加登录验证
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<!-- 读取spring配置文件(与监听器配合使用) start -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring-*.xml</param-value>
</context-param>
<!-- end -->
<!-- 对SpringMVC的支持 start -->
<servlet>
<servlet-name>SpringMVC</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring-*.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- end -->
<!-- 编码过滤器 start -->
<filter>
<filter-name>EncodingFilter</filter-name>
<filter-class>
org.springframework.web.filter.CharacterEncodingFilter
</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>EncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- end -->
<!-- Druid start -->
<servlet>
<servlet-name>DruidStatView</servlet-name>
<servlet-class>
com.alibaba.druid.support.http.StatViewServlet
</servlet-class>
<init-param>
<!-- 不允许清空统计数据 -->
<param-name>resetEnable</param-name>
<param-value>false</param-value>
</init-param>
<init-param>
<!-- 用户名 -->
<param-name>loginUsername</param-name>
<param-value>admin</param-value>
</init-param>
<init-param>
<!-- 密码 -->
<param-name>loginPassword</param-name>
<param-value>admin</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>DruidStatView</servlet-name>
<url-pattern>/druid/*</url-pattern>
</servlet-mapping>
<!-- end -->
<!-- Spring监听器 start -->
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<!-- end -->
<!-- 替换404页面 start -->
<error-page>
<error-code>404</error-code>
<location>/WEB-INF/views/404.html</location>
</error-page>
<!-- end -->
</web-app>Druid效果：
404效果：
4.3、spring-mybatis.xml
1）修改 配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中(适用Mapper)
2) 去掉扫描sql配置文件mapeer注释
3）添加 PageHelper 配置
<?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:p="http://www.springframework.org/schema/p"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<!-- 配置整合mybatis过程 -->
<!-- 1.开启自动扫描 -->
<context:component-scan base-package="com.ray"/>
<!-- 2.配置数据库相关参数properties的属性：${url} -->
<!-- 使用数据库配置文件解耦 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 3.数据库连接池 -->
<!-- 下面的druid配置都是基本配置,具体优化设置可以上网查询,也可以去github上面直接搜索druid -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<!-- 配置连接池属性 -->
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!-- 配置初始化大小、最小、最大 -->
<property name="initialSize" value="${druid.initialSize}"/>
<property name="minIdle" value="${druid.minIdle}"/>
<property name="maxActive" value="${druid.maxActive}"/>
<!-- 配置获取连接等待超时的时间 -->
<property name="maxWait" value="${druid.maxWait}"/>
<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="${druid.timeBetweenEvictionRunsMillis}"/>
<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="${druid.minEvictableIdleTimeMillis}"/>
<!-- 验证连接有效与否的SQL，不同的数据配置不同 -->
<property name="validationQuery" value="${druid.validationQuery}" />
<!-- 如果空闲时间大于timeBetweenEvictionRunsMillis，执行validationQuery检测连接是否有效 -->
<property name="testWhileIdle" value="${druid.testWhileIdle}"/>
<!-- 这里建议配置为TRUE，防止取到的连接不可用 -->
<property name="testOnBorrow" value="${druid.testOnBorrow}"/>
<property name="testOnReturn" value="${druid.testOnReturn}"/>
<!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
<!-- 如果用Oracle，则把poolPreparedStatements配置为true，mysql可以配置为false。 -->
<property name="poolPreparedStatements" value="${druid.poolPreparedStatements}"/>
<property name="maxPoolPreparedStatementPerConnectionSize" value="${druid.maxPoolPreparedStatementPerConnectionSize}"/>
<!-- 这里配置提交方式，默认就是TRUE，可以不用配置 -->
<property name="defaultAutoCommit" value="${druid.defaultAutoCommit}" />
<!-- 合并多个DruidDataSource的监控数据 -->
<property name="useGlobalDataSourceStat" value="${druid.useGlobalDataSourceStat}"/>
<!-- 开启Druid的监控统计功能,StatFilter可以和其他的Filter配置使用 -->
<property name="filters" value="${druid.filters}"/>
<!-- proxyFilters属性配置,通过bean的方式配置 -->
<property name="proxyFilters">
<list>
<ref bean="log4j2-filter"/>
</list>
</property>
</bean>
<!-- 上面的druid的配置 -->
<bean id="log4j2-filter" class="com.alibaba.druid.filter.logging.Log4j2Filter">
<!-- 所有连接相关的日志 -->
<property name="connectionLogEnabled" value="false"/>
<!-- 所有Statement相关的日志 -->
<property name="statementLogEnabled" value="false"/>
<!-- 是否显示结果集 -->
<property name="resultSetLogEnabled" value="true"/>
<!-- 是否显示SQL语句 -->
<property name="statementExecutableSqlLogEnable" value="true"/>
</bean>
<!-- 4.spring和MyBatis的完美结合，不需要mybatis的配置映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 配置MyBaties全局配置文件:mybatis-config.xml -->
<property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/>
<!-- 注入数据库连接池 -->
<property name="dataSource" ref="dataSource"/>
<!-- 扫描entity包,使用别名 -->
<property name="typeAliasesPackage" value="com.ray.entity"/>
<!-- 扫描sql配置文件mapeer -->
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
<!-- 配置分页插件 -->
<property name="plugins">
<array>
<bean class="com.github.pagehelper.PageInterceptor">
<property name="properties">
<!-- 常用配置 -->
<value>
helperDialect=mysql
reasonable=true
</value>
</property>
</bean>
</array>
</property>
</bean>
<!-- 5.配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中(适用Mapper) -->
<bean class="tk.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 给出需要扫描Dao接口包 -->
<property name="basePackage" value="com.ray.dao"/>
</bean>
</beans>4.4、spring-mvc.xml
<!--若使用映射路径，则添加如下映射-->
<mvc:resources mapping="/views/**" location="/WEB-INF/views/"/>
<mvc:resources mapping="/images/**" location="/static/images/"/><?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">
<!-- 1.自动扫描包 -->
<context:component-scan base-package="com.ray.controller"/>
<!-- 2.添加注解驱动 -->
<mvc:annotation-driven/>
<!-- 3.静态资源由WEB服务器默认的Servlet来处理 -->
<mvc:default-servlet-handler/>
<!--若使用映射路径，则添加如下映射-->
<mvc:resources mapping="/views/**" location="/WEB-INF/views/"/>
<mvc:resources mapping="/images/**" location="/static/images/"/>
<!-- 4.定义跳转的文件的前后缀,视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>4.5、404.html
测试直接访问映射路径
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>自定义404页面</title>
</head>
<body>
<img src="/images/404.png">
</body>
</html>5、新增部分
5.1、generatorConfig.xml
1）配置文件位置：src/main/resources/mybatis/generatorConfig.xml
2）可选配置：继承自定义的MyMapper接口（推荐）
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<!-- 配置生成器 -->
<generatorConfiguration>
<!-- 使用数据库配置文件解耦 -->
<properties resource="jdbc.properties"/>
<!-- context 遵循严格的配置顺序 -->
<context id="MyBatis" targetRuntime="MyBatis3" defaultModelType="flat">
<!-- 指明数据库的用于标记数据库对象名的符号，比如ORACLE就是"双引号，MYSQL默认是`反引号 -->
<property name="beginningDelimiter" value="`"/>
<property name="endingDelimiter" value="`"/>
<!-- 继承该自定义MyMapper接口(可选配置) -->
<plugin type="tk.mybatis.mapper.generator.MapperPlugin">
<!--配置后生成的 Mapper 接口都会自动继承该接口-->
<property name="mappers" value="com.ray.util.MyMapper" />
<!--caseSensitive默认false，当数据库表名区分大小写时，可以将该属性设置为true-->
<property name="caseSensitive" value="true"/>
</plugin>
<!-- 移除自动生成的注释 -->
<commentGenerator>
<property name="javaFileEncoding" value="UTF-8"/>
<property name="suppressDate" value="true" />
<!-- 移除自动生成的注释 true|false -->
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!-- 配置连接池属性 -->
<jdbcConnection driverClass="${jdbc.driver}"
connectionURL="${jdbc.url}"
userId="${jdbc.username}"
password="${jdbc.password}">
</jdbcConnection>
<!-- 处理NUMERIC和DECIMAL类型的策略 -->
<javaTypeResolver>
<property name="forceBigDecimals" value="true"/>
</javaTypeResolver>
<!-- 控制生成的实体类(替换targetPackage) -->
<javaModelGenerator targetPackage="com.ray.entity"
targetProject="src/main/java">
<property name="enableSubPackages" value="true" />
<!-- 设置是否在getter方法中，对String类型字段调用trim()方法 -->
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- 生成映射文件(替换targetPackage) -->
<sqlMapGenerator targetPackage="mapper"
targetProject="src/main/resources">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!-- 生成Mapper接口(替换targetPackage) -->
<javaClientGenerator type="XMLMAPPER"
targetPackage="com.ray.dao"
targetProject="src/main/java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- 生成对应表名及类名(替换city), %表示生成全部的表-->
<!-- 去掉Mybatis-Generator生成的一堆example -->
<table tableName="city"
enableCountByExample="false"
enableUpdateByExample="false"
enableDeleteByExample="false"
enableSelectByExample="false"
selectByExampleQueryId="false">
<!-- 自动生成主键的属性(替换id) -->
<generatedKey column="id" sqlStatement="Mysql" identity="true"/>
</table>
</context>
</generatorConfiguration>5.2、MyMapper.java
1）创建自定义MyMapper,用于生成的Mapper继承该接口。
2）位置：package com.ray.util;
package com.ray.util;
import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;
/**
* @author Ray
* @date 2018/7/14 0014
* 自定义MyMapper,用于生成的Mapper继承该接口
*/
public interface MyMapper<T> extends Mapper<T>, MySqlMapper<T> {
//FIXME 特别注意，该接口不能被扫描到，否则会出错
}5.3、配置Maven插件
1）配置Command line：mybatis-generator:generate -e
2）配置Name：Mybatis-Generator
Run Configurations
6、项目结构
7、简单测试Mapper 和 PageHelper操作
7.1、创建BaseTest ，所有测试类继承该类。
/**
* @author Ray
* @date 2018/7/14 0014
*/
@RunWith(SpringJUnit4ClassRunner.class) // 使用Springtest测试框架
@ContextConfiguration({ "classpath:spring/spring-*.xml" }) // 告诉junit spring配置文件
public class BaseTest {
}7.2、创建CityTest ，测试Mapper 和 PageHelper
/**
* @author Ray
* @date 2018/7/14 0014
*/
public class CityTest extends BaseTest {
@Autowired
private CityMapper cityMapper;
@Test
public void selectByPage(){
// 分页查询,从第page页开始，每页显示rows条记录
PageHelper.startPage(2,5);
// Mapper提供的查询所有信息方法
List<City> cities = cityMapper.selectAll();
}
}7.3、测试结果
