上一次完成的 SSM 个人博客，由于时间的问题，没法及时整理，所以现在我要来一步一步回忆，我是怎么完成这个小项目的。
要使用 SSM 来开发个人博客，第一步就是整合 SSM 环境
- 我使用的 IDE 是 MyEclipse for Spring 2014
- tomcat7
- java version : 1.8.0_101
- spring-*-4.3.4.RELEASE.jar
- mybatis-3.4.1.jar
- mybatis-spring-1.3.0.jar
关于 SSM 的整合教程，网上的资源丰富，我是看了一个视频教程，那个教程免费而且挺好的。参考我的另外一篇 博文
或者参考 GitHub 上的教程： https://github.com/liyifeng1994/ssm
为了简便，我用的是 junit 的单元测试，下面给出配置文件的代码 applicationContext.xml ：
<?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:aop="http://www.springframework.org/schema/aop" xmlns:c="http://www.springframework.org/schema/c"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd">
<!-- 扫描 service 包下的所有 Service 组件类 -->
<context:component-scan base-package="service"></context:component-scan>
<!-- 配置数据源 -->
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="url" value="jdbc:mysql://localhost:3306/jspblog"></property>
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="username" value="root"></property>
<property name="password" value="XXXXX"></property>
</bean>
<!-- sqlSessionFactory 工厂类 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 引用数据源 -->
<property name="dataSource" ref="dataSource"></property>
<!-- Mybatis 逆向生成 xml 数据库配置文件 -->
<property name="mapperLocations">
<array>
<value>classpath:mapping/*.xml</value>
</array>
</property>
<!-- 使用分页插件的配置 -->
<property name="plugins">
<array>
<bean class="com.github.pagehelper.PageInterceptor">
<!-- 这里的几个配置主要演示如何使用，如果不理解，一定要去掉下面的配置 -->
<!--
helperDialect：分页插件会自动检测当前的数据库链接，自动选择合适的分页方式。
reasonable：分页合理化参数，默认值为false。当该参数设置为 true 时，pageNum<=0
时会查询第一页， pageNum>pages（超过总数时），会查询最后一页。默认false 时，直接根
据参数进行查询。
supportMethodsArguments：支持通过 Mapper 接口参数来传递分页参数，默认值false
utoRuntimeDialect：默认值为 false。设置为 true 时，允许在运行时根据多数据源自动
识别对应方言的分页
params：为了支持startPage(Object params)方法，增加了该参数来配置参数映射，用于从对象中根据属性名取值，
可以配置 pageNum,pageSize,count,pageSizeZero,reasonable，不配置映射的用默认值， 默认值为
pageNum=pageNum;pageSize=pageSize;count=countSql;reasonable=reasonable;
pageSizeZero=pageSizeZero
-->
<property name="properties">
<value>
helperDialect=mysql
reasonable=true
</value>
</property>
</bean>
</array>
</property>
</bean>
<!-- Mybatis 的配置，给出 mapper 接口类的基础包，运行时 Mybatis 会生成代理类对象, 引用上面的工厂类 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="mapping"></property>
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean>
<!-- 面向切面编程的配置 -->
<aop:aspectj-autoproxy />
<aop:config>
<aop:pointcut id="appService" expression="execution(* service..*Service*.*(..))" />
<aop:advisor advice-ref="txAdvice" pointcut-ref="appService" />
</aop:config>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="select*" read-only="true" />
<tx:method name="find*" read-only="true" />
<tx:method name="get*" read-only="true" />
<tx:method name="*" />
</tx:attributes>
</tx:advice>
<!-- 声明式事务管理 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
</beans>
SpringMVC 的配置文件， springMVC-servlet.xml :
<?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:aop="http://www.springframework.org/schema/aop" xmlns:c="http://www.springframework.org/schema/c"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:util="http://www.springframework.org/schema/util"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd">
<!-- 配置文件上传功能 -->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="2048000000" />
<!-- 请求的编码格式，必须和jSP的pageEncoding属性一致，以便正确读取表单的内容，默认为ISO-8859-1 -->
<property name="defaultEncoding">
<value>UTF-8</value>
</property>
</bean>
<context:component-scan base-package="controller" />
<!-- 将springmvc 不能处理的请求交给 tomcat -->
<mvc:default-servlet-handler />
<!-- 这个基于注解的配置一定要写，不然 controller 无法工作 -->
<mvc:annotation-driven>
<!-- <mvc:message-converters>
<bean class="org.springframework.http.converter.ResourceHttpMessageConverter" >
</bean>
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" >
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
</mvc:message-converters> -->
</mvc:annotation-driven>
<!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
</list>
</property>
</bean>
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->
</list>
</property>
</bean>
<!-- spring-mvc jsp视图解析器 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
<property name="prefix" value="/WEB-INF/jsp/"></property> <property name="suffix"
value=".jsp"></property> </bean>
<!-- 配置静态资源 -->
<mvc:resources mapping="/images/**" location="/WEB-INF/images/" />
<mvc:resources mapping="/js/**" location="/WEB-INF/js/" />
<mvc:resources mapping="/css/**" location="/WEB-INF/css/" />
</beans>
Mybatis 的配置文件，是空的，因为全部的配置基本在 Spring 中配置，分页插件一定要在 Spring 配置，交给 Spring 管理，因为写在 Mybatis 配置文件会报错。但是还是给出来，因为有一些命名规则还是可以选择配置的：
<?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>
<!-- 下面的配置可以不用，因为连接数据库等信息是在 Spring 4 配置文件中进行定义 -->
<!-- <environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/ssmblog"/>
<property name="username" value="root"/>
<property name="password" value="XXXX"/>
</dataSource>
</environment>
</environments> -->
<!-- <mappers>
<mapper resource="mapping/IUserinfoMapping.xml"/>
</mappers> -->
<!-- - 配置全局属性
<settings>
使用jdbc的getGeneratedKeys获取数据库自增主键值
<setting name="useGeneratedKeys" value="true" />
<setting name="useColumnLabel" value="true" />
开启驼峰命名转换:Table{create_time} -> Entity{createTime}
<setting name="mapUnderscoreToCamelCase" value="true" />
</settings>
-->
<!-- <plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor">
<property name="helperDialect" value="mysql"/>
<property name="reasonable" value="true"/>
<property name="supportMethodsArguments" value="true"/>
<property name="autoRuntimeDialect" value="true"/>
</plugin>
</plugins> -->
</configuration>
Mybatis 支持逆向生成 mapper 等文件，简化开发的过程，下面是配置文件，运行方法可以在 eclipse 安装插件运行 和 命令行运行命令，这里就省略了。
<?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">
<generatorConfiguration>
<context id="context1">
<!-- 数据库连接 -->
<jdbcConnection connectionURL="jdbc:mysql://localhost:3306/jspblog" driverClass="com.mysql.jdbc.Driver" password="XXXXX" userId="root" />
<!-- 生成 entity 类， 也就是对应数据库数据表行记录的类 -->
<javaModelGenerator targetPackage="entity" targetProject="SSMBlog" />
<!-- 生成操作数据库 xml 配置文件 -->
<sqlMapGenerator targetPackage="mapping" targetProject="SSMBlog" />
<!-- 生成 xml 配置文件对应的接口类， 相当于 Dao 接口-->
<javaClientGenerator targetPackage="mapping" targetProject="SSMBlog" type="XMLMAPPER" />
<!-- 对 jspblog 数据库的 users 表进行逆向 -->
<table schema="jspblog" tableName="users">
<generatedKey column="id" sqlStatement="mysql" identity="true" />
</table>
</context>
</generatorConfiguration>
表的结构：
下面给出 web.xml 文件：
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>SSMBlog</display-name>
<!-- 这个配置是为了获取tomcat的根目录 -->
<context-param>
<param-name>webAppRootKey</param-name>
<param-value>editormd.root</param-value>
</context-param>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>classpath:log4j.properties</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 防止中文乱码 -->
<filter>
<filter-name>charFilter</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>
</filter>
<filter-mapping>
<filter-name>charFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>springMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
Users 类：
package entity;
public class Users {
/**
*
* This field was generated by MyBatis Generator.
* This field corresponds to the database column users.id
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
private Integer id;
/**
*
* This field was generated by MyBatis Generator.
* This field corresponds to the database column users.username
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
private String username;
/**
*
* This field was generated by MyBatis Generator.
* This field corresponds to the database column users.password
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
private String password;
public Users() {
}
public Users(String un, String pw) {
username = un;
password = pw;
}
/**
* This method was generated by MyBatis Generator.
* This method returns the value of the database column users.id
*
* @return the value of users.id
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
public Integer getId() {
return id;
}
/**
* This method was generated by MyBatis Generator.
* This method sets the value of the database column users.id
*
* @param id the value for users.id
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
public void setId(Integer id) {
this.id = id;
}
/**
* This method was generated by MyBatis Generator.
* This method returns the value of the database column users.username
*
* @return the value of users.username
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
public String getUsername() {
return username;
}
/**
* This method was generated by MyBatis Generator.
* This method sets the value of the database column users.username
*
* @param username the value for users.username
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
public void setUsername(String username) {
this.username = username;
}
/**
* This method was generated by MyBatis Generator.
* This method returns the value of the database column users.password
*
* @return the value of users.password
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
public String getPassword() {
return password;
}
/**
* This method was generated by MyBatis Generator.
* This method sets the value of the database column users.password
*
* @param password the value for users.password
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
public void setPassword(String password) {
this.password = password;
}
}
UserMapper.xml 配置文件：
<?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="mapping.UsersMapper">
<resultMap id="BaseResultMap" type="entity.Users">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
<id column="id" jdbcType="INTEGER" property="id" />
<result column="username" jdbcType="VARCHAR" property="username" />
<result column="password" jdbcType="VARCHAR" property="password" />
</resultMap>
<sql id="Example_Where_Clause">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
<where>
<foreach collection="oredCriteria" item="criteria" separator="or">
<if test="criteria.valid">
<trim prefix="(" prefixOverrides="and" suffix=")">
<foreach collection="criteria.criteria" item="criterion">
<choose>
<when test="criterion.noValue">
and ${criterion.condition}
</when>
<when test="criterion.singleValue">
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue">
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue">
and ${criterion.condition}
<foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Update_By_Example_Where_Clause">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
<where>
<foreach collection="example.oredCriteria" item="criteria" separator="or">
<if test="criteria.valid">
<trim prefix="(" prefixOverrides="and" suffix=")">
<foreach collection="criteria.criteria" item="criterion">
<choose>
<when test="criterion.noValue">
and ${criterion.condition}
</when>
<when test="criterion.singleValue">
and ${criterion.condition} #{criterion.value}
</when>
<when test="criterion.betweenValue">
and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
</when>
<when test="criterion.listValue">
and ${criterion.condition}
<foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
#{listItem}
</foreach>
</when>
</choose>
</foreach>
</trim>
</if>
</foreach>
</where>
</sql>
<sql id="Base_Column_List">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
id, username, password
</sql>
<select id="selectByExample" parameterType="entity.UsersExample" resultMap="BaseResultMap">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
select
<if test="distinct">
distinct
</if>
<include refid="Base_Column_List" />
from users
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
<if test="orderByClause != null">
order by ${orderByClause}
</if>
</select>
<select id="selectByPrimaryKey" parameterType="java.lang.Integer" resultMap="BaseResultMap">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
select
<include refid="Base_Column_List" />
from users
where id = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
delete from users
where id = #{id,jdbcType=INTEGER}
</delete>
<delete id="deleteByExample" parameterType="entity.UsersExample">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
delete from users
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
</delete>
<insert id="insert" parameterType="entity.Users">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
<selectKey keyProperty="id" order="AFTER" resultType="java.lang.Integer">
SELECT LAST_INSERT_ID()
</selectKey>
insert into users (username, password)
values (#{username,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR})
</insert>
<insert id="insertSelective" parameterType="entity.Users">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
<selectKey keyProperty="id" order="AFTER" resultType="java.lang.Integer">
SELECT LAST_INSERT_ID()
</selectKey>
insert into users
<trim prefix="(" suffix=")" suffixOverrides=",">
<if test="username != null">
username,
</if>
<if test="password != null">
password,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides=",">
<if test="username != null">
#{username,jdbcType=VARCHAR},
</if>
<if test="password != null">
#{password,jdbcType=VARCHAR},
</if>
</trim>
</insert>
<select id="countByExample" parameterType="entity.UsersExample" resultType="java.lang.Long">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
select count(*) from users
<if test="_parameter != null">
<include refid="Example_Where_Clause" />
</if>
</select>
<update id="updateByExampleSelective" parameterType="map">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
update users
<set>
<if test="record.id != null">
id = #{record.id,jdbcType=INTEGER},
</if>
<if test="record.username != null">
username = #{record.username,jdbcType=VARCHAR},
</if>
<if test="record.password != null">
password = #{record.password,jdbcType=VARCHAR},
</if>
</set>
<if test="_parameter != null">
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByExample" parameterType="map">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
update users
set id = #{record.id,jdbcType=INTEGER},
username = #{record.username,jdbcType=VARCHAR},
password = #{record.password,jdbcType=VARCHAR}
<if test="_parameter != null">
<include refid="Update_By_Example_Where_Clause" />
</if>
</update>
<update id="updateByPrimaryKeySelective" parameterType="entity.Users">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
update users
<set>
<if test="username != null">
username = #{username,jdbcType=VARCHAR},
</if>
<if test="password != null">
password = #{password,jdbcType=VARCHAR},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="entity.Users">
<!--
WARNING - @mbg.generated
This element is automatically generated by MyBatis Generator, do not modify.
This element was generated on Mon Dec 18 10:49:53 CST 2017.
-->
update users
set username = #{username,jdbcType=VARCHAR},
password = #{password,jdbcType=VARCHAR}
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>
userMapper.java 接口类：
package mapping;
import entity.Users;
import entity.UsersExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;
public interface UsersMapper {
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table users
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
long countByExample(UsersExample example);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table users
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
int deleteByExample(UsersExample example);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table users
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
int deleteByPrimaryKey(Integer id);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table users
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
int insert(Users record);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table users
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
int insertSelective(Users record);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table users
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
List<Users> selectByExample(UsersExample example);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table users
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
Users selectByPrimaryKey(Integer id);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table users
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
int updateByExampleSelective(@Param("record") Users record, @Param("example") UsersExample example);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table users
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
int updateByExample(@Param("record") Users record, @Param("example") UsersExample example);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table users
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
int updateByPrimaryKeySelective(Users record);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table users
*
* @mbg.generated Mon Dec 18 10:49:53 CST 2017
*/
int updateByPrimaryKey(Users record);
}
UserService 类：
package service;
import mapping.UsersMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import entity.Users;
@Service
public class UserService {
@Autowired
private UsersMapper usersMapper;
// 返回 指定 id 的 User 对象
public Users selectUserById(int id) {
return usersMapper.selectByPrimaryKey(id);
}
}
到此配置环境基本完成了，下面写一个测试类进行测试：
package test;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import entity.Users;
import service.UserService;
@RunWith(SpringJUnit4ClassRunner.class)
// 加载 Spring 的配置文件， applicationContext.xml
@ContextConfiguration(locations = "classpath:applicationContext.xml")
public class TestSSM extends AbstractJUnit4SpringContextTests {
@Autowired
private UserService userService;
@Test
public void testSSM() {
Users user = userService.selectUserById(1);
System.out.println("user username = " + user.getUsername()
+ " user password = " + user.getPassword());
}
}
使用的是 Juni4 和 Spring 的单元测试类, 继承 AbstractJUnit4SpringContextTests 抽象类。使用 junit-4.12.jar 和 hamcrest-core-1.3.jar。
运行结果 ：
这个根据你表的记录，我的行记录是 id 为 1， username 和 password 都为 test。
新建的是 Web Project, 项目的目录结构是 ：
至此，啰里啰唆的配置完了 SSM 环境。
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