java SSM框架单元测试最佳实战代码

具体的代码参考链接：https://pan.baidu.com/s/1e9UTyidi4OMBwYydhwH-0g 密码：rmvs

 本教程采用的是对单元测试的dao层、service层、control层进行单元测试

其中采用的测试框架可以是junit，也可以是testNG

对应dao层的测试采用的框架是TestNg+dbunit+spring-test-dbunit框架

对应的service层的测试采用的框架是powermock+dbunit+spring-test框架

对应的control层采用的测试框架是mockmvc+dbunit+spring-test框架

项目采用的是maven进行管理：其中数据库使用的是mysql

对应的数据库文件如下：

对于的sql文件内容如下：

ssm_crud.sql

/*
Navicat MySQL Data Transfer

Source Server         : 本地电脑2
Source Server Version : 50527
Source Host           : localhost:3306
Source Database       : ssm_crud

Target Server Type    : MYSQL
Target Server Version : 50527
File Encoding         : 65001

Date: 2018-07-06 16:56:08
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for `tbl_dept`
-- ----------------------------
DROP TABLE IF EXISTS `tbl_dept`;
CREATE TABLE `tbl_dept` (
  `dept_id` int(1) NOT NULL AUTO_INCREMENT,
  `dept_name` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`dept_id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of tbl_dept
-- ----------------------------
INSERT INTO `tbl_dept` VALUES ('1', '研发部');
INSERT INTO `tbl_dept` VALUES ('2', '测试部');

-- ----------------------------
-- Table structure for `tbl_emp`
-- ----------------------------
DROP TABLE IF EXISTS `tbl_emp`;
CREATE TABLE `tbl_emp` (
  `emp_id` int(11) NOT NULL AUTO_INCREMENT,
  `emp_name` varchar(255) DEFAULT NULL,
  `gender` varchar(1) DEFAULT NULL,
  `email` varchar(255) DEFAULT NULL,
  `d_id` int(11) NOT NULL,
  PRIMARY KEY (`emp_id`),
  KEY `d-Id` (`d_id`),
  CONSTRAINT `d-Id` FOREIGN KEY (`d_id`) REFERENCES `tbl_dept` (`dept_id`)
) ENGINE=InnoDB AUTO_INCREMENT=7889 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of tbl_emp
-- ----------------------------
INSERT INTO `tbl_emp` VALUES ('10', 'admin10', 'M', '1878899@qq.com', '1');
INSERT INTO `tbl_emp` VALUES ('12', 'weqwe', 'M', 'wssfesfdfd', '2');
INSERT INTO `tbl_emp` VALUES ('200', 'kebi', null, '899090e@qq.com', '1');
INSERT INTO `tbl_emp` VALUES ('233', '33', '3', '3', '2');
INSERT INTO `tbl_emp` VALUES ('7888', 'kebi', 'M', '899090e@qq.com', '1');

项目对于的工程如下：就是一个maven整合ssm，采用springmvc+spring+mybatis的一个整合，视频可以参考尚硅谷ssm高级整合视频教程

使用到的整合的配置文件如下所示：

 我们来看下具体的每个配置文件，因为使用的maven管理，在pom文件中对jar包进行依赖管理

<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.atguigu</groupId>
    <artifactId>ssm-crud</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>


    <!--引入项目依赖的jar包 -->
    <!-- SpringMVC、Spring -->
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
    <dependencies>

        <!--引入pageHelper分页插件 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.0.0</version>
        </dependency>

        <!-- MBG -->
        <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>


        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>

        <!-- 返回json字符串的支持 -->
        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.8</version>
        </dependency>

        <!--JSR303数据校验支持；tomcat7及以上的服务器， 
        tomcat7以下的服务器：el表达式。额外给服务器的lib包中替换新的标准的el
        -->
        <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>5.4.1.Final</version>
        </dependency>


        <!-- Spring-Jdbc -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>

        <!--Spring-test -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>


        <!-- Spring面向切面编程 -->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>4.3.7.RELEASE</version>
        </dependency>

        <!--MyBatis -->
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.2</version>
        </dependency>
        <!-- MyBatis整合Spring的适配包 -->
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>

        <!-- 数据库连接池、驱动 -->
        <!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.41</version>
        </dependency>
        <!-- （jstl，servlet-api，junit） -->
        <!-- https://mvnrepository.com/artifact/jstl/jstl -->
        <dependency>
            <groupId>javax.servlet.jsp.jstl</groupId>
            <artifactId>jstl-api</artifactId>
            <version>1.2</version>
            <exclusions>
                <exclusion>
                    <groupId>javax.servlet</groupId>
                    <artifactId>servlet-api</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>javax.servlet.jsp</groupId>
                    <artifactId>jsp-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
            <scope>provided</scope>
        </dependency>


        <!-- junit -->
        <!-- https://mvnrepository.com/artifact/junit/junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        
         <!-- springmvc测试框架所需用的的包 -->
         

        <dependency>
            <groupId>com.jayway.jsonpath</groupId>
            <artifactId>json-path-assert</artifactId>
            <version>0.8.1</version>
        </dependency>
  
     <dependency>
        <groupId>com.jayway.jsonpath</groupId>
        <artifactId>json-path</artifactId>
        <version>0.8.0</version>
   </dependency>
      
      <!-- json -->
<dependency>
  <groupId>com.alibaba</groupId>
  <artifactId>fastjson</artifactId>
  <version>1.2.3</version>
</dependency>

<!-- dbutil测试工具的引入依赖 -->
<dependency>
    <groupId>com.github.springtestdbunit</groupId>
    <artifactId>spring-test-dbunit</artifactId>
    <version>1.2.0</version>
</dependency>
<dependency>
    <groupId>org.dbunit</groupId>
    <artifactId>dbunit</artifactId>
    <version>2.5.0</version>
</dependency>

<dependency>
            <groupId>org.testng</groupId>
            <artifactId>testng</artifactId>
            <version>6.8</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-all</artifactId>
            <version>1.10.19 </version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.powermock</groupId>
            <artifactId>powermock-api-mockito</artifactId>
            <version>1.6.5</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.powermock</groupId>
            <artifactId>powermock-module-testng</artifactId>
            <version>1.6.5</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.powermock</groupId>
            <artifactId>powermock-core</artifactId>
            <version>1.6.5</version>
            <scope>test</scope>
        </dependency>
     
    </dependencies>




</project>

mybatis-config.xml

<?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>
   <!-- 开启驼峰命名 -->
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
    <!-- 给下面com.atguigu.crud.bean启用别名，默认就是类名的第一个字母小写Employee对应的别名就是employee -->
    <typeAliases>
        <package name="com.atguigu.crud.bean"/>
    </typeAliases>    
    
    <!-- 需要注意的是分页插件必须放在<typeAliases>的后面 -->
    <plugins>
        <plugin interceptor="com.github.pagehelper.PageInterceptor">
            <!--分页参数合理化  -->
            <property name="reasonable" value="true"/>
        </plugin>
    </plugins>
</configuration>

dispatcher-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:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:task="http://www.springframework.org/schema/task"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans  
                        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd  
                        http://www.springframework.org/schema/context  
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd
                        http://www.springframework.org/schema/mvc  
                        http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
                        http://www.springframework.org/schema/tx
                        http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
                        http://www.springframework.org/schema/task
                        http://www.springframework.org/schema/task/spring-task-3.1.xsd
                        http://www.springframework.org/schema/aop
                        http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">

    <!-- 配置扫描控制器 ，springmvc值扫描controler，其他的对象都让spring去管理,这里use-default-filters="false"要设置成false-->
    <context:component-scan base-package="com.atguigu" use-default-filters="false">
      <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!-- 配置视图解析器 -->
    <!-- 配置视图解析器 -->  
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
    <!-- 配置视图解析器的前缀和后缀 -->  
    <property name="prefix" value="/WEB-INF/views/"></property>  
    <property name="suffix" value=".jsp"></property>  
</bean>  
 
 <!-- 配置允许访问静态资源文件 -->
 <mvc:default-servlet-handler/>
 <!-- 支持springmvc的更加高级的东西 -->
 <mvc:annotation-driven></mvc:annotation-driven>
 
 

</beans>

dbconfig.properties

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/ssm_crud
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=123456

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: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/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">

    
    <!-- Spring配置文件的核心点（数据源、与mybatis的整合，事务控制） -->
    
    <!-- 配置c3p0数据源 -->
    <!-- 引入外部的数据库配置文件 -->
    <context:property-placeholder location="classpath:dbconfig.properties"/>
    <bean id="pooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
        <property name="driverClass" value="${jdbc.driverClass}"></property>
        <property name="user" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    
    <!-- 配置spring的IOC，但是不能扫描springmvc的controller，spring 扫描service dao utils的bean
    controller由springmvc去扫描 -->
    
    <context:component-scan base-package="com.atguigu">
     <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
    
    
    
    <!--================== 配置和MyBatis的整合=============== -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 指定mybatis全局配置文件的位置 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <!-- 数据源就是上面配置的c3p0数据源 -->
        <property name="dataSource" ref="pooledDataSource"></property>
        <!-- 指定mybatis，mapper文件的位置 ，扫描mapper文件夹下面的所有配置文件-->
        <property name="mapperLocations" value="classpath:mapper/*.xml"></property>
    </bean>
        
    <!-- 配置一个可以执行批量的sqlSession -->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg>
        <constructor-arg name="executorType" value="BATCH"></constructor-arg>
    </bean>
    <!-- 通过自动扫描简化mapper的配置

前面的章节可以看到，我们的dao需要一个一个的配置在配置文件中，
如果有很多个dao的话配置文件就会非常大，这样管理起来就会比较痛苦。
幸好mybatis团队也意识到了这点，
他们利用spring提供的自动扫描功能封装了一个自动扫描dao的工具类，这样我们就可以使用这个功能简化配置： -->

    <!-- 配置扫描器，将mybatis接口的实现加入到ioc容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--扫描所有dao接口的实现，加入到ioc容器中 -->
        <property name="basePackage" value="com.atguigu.crud.dao"></property>
    </bean>
    
    <!-- ===============事务控制的配置 ================-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--控制住数据源  -->
        <property name="dataSource" ref="pooledDataSource"></property>
    </bean>
    <!--开启基于注解的事务，使用xml配置形式的事务（必要主要的都是使用配置式）  -->
    
    
    <!--配置事务增强，事务如何切入  -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <!-- 所有方法都是事务方法 -->
            <tx:method name="*"/>
            <!--以get开始的所有方法  -->
            <tx:method name="get*" read-only="true"/>
        </tx:attributes>
    </tx:advice>
    
     <!-- 配置哪些类的哪些方法使用事务（配置事务边界，配置Pointcut） -->
    <aop:config>
        <aop:pointcut id="allManagerMethod" expression="execution(* com.weiyuan.test.service.*.*(..))"/>
        <aop:advisor pointcut-ref="allManagerMethod" advice-ref="txAdvice"/>
    </aop:config> 
    
    <!-- Spring配置文件的核心点（数据源、与mybatis的整合，事务控制） -->
 
        
    
</beans>

mapper下是对应生成的mybatis的映射接口文件

DepartmentMapper.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.atguigu.crud.dao.DepartmentMapper">
  <resultMap id="BaseResultMap" type="com.atguigu.crud.bean.Department">
    <id column="dept_id" jdbcType="INTEGER" property="deptId" />
    <result column="dept_name" jdbcType="VARCHAR" property="deptName" />
  </resultMap>
  <sql id="Example_Where_Clause">
    <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">
    <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">
    dept_id, dept_name
  </sql>
  <select id="selectByExample" parameterType="com.atguigu.crud.bean.DepartmentExample" resultMap="BaseResultMap">
    select
    <if test="distinct">
      distinct
    </if>
    <include refid="Base_Column_List" />
    from tbl_dept
    <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">
    select 
    <include refid="Base_Column_List" />
    from tbl_dept
    where dept_id = #{deptId,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
    delete from tbl_dept
    where dept_id = #{deptId,jdbcType=INTEGER}
  </delete>
  <delete id="deleteByExample" parameterType="com.atguigu.crud.bean.DepartmentExample">
    delete from tbl_dept
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
  </delete>
  <insert id="insert" parameterType="com.atguigu.crud.bean.Department">
    insert into tbl_dept (dept_id, dept_name)
    values (#{deptId,jdbcType=INTEGER}, #{deptName,jdbcType=VARCHAR})
  </insert>
  <insert id="insertSelective" parameterType="com.atguigu.crud.bean.Department">
    insert into tbl_dept
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="deptId != null">
        dept_id,
      </if>
      <if test="deptName != null">
        dept_name,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="deptId != null">
        #{deptId,jdbcType=INTEGER},
      </if>
      <if test="deptName != null">
        #{deptName,jdbcType=VARCHAR},
      </if>
    </trim>
  </insert>
  <select id="countByExample" parameterType="com.atguigu.crud.bean.DepartmentExample" resultType="java.lang.Long">
    select count(*) from tbl_dept
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
  </select>
  <update id="updateByExampleSelective" parameterType="map">
    update tbl_dept
    <set>
      <if test="record.deptId != null">
        dept_id = #{record.deptId,jdbcType=INTEGER},
      </if>
      <if test="record.deptName != null">
        dept_name = #{record.deptName,jdbcType=VARCHAR},
      </if>
    </set>
    <if test="_parameter != null">
      <include refid="Update_By_Example_Where_Clause" />
    </if>
  </update>
  <update id="updateByExample" parameterType="map">
    update tbl_dept
    set dept_id = #{record.deptId,jdbcType=INTEGER},
      dept_name = #{record.deptName,jdbcType=VARCHAR}
    <if test="_parameter != null">
      <include refid="Update_By_Example_Where_Clause" />
    </if>
  </update>
  <update id="updateByPrimaryKeySelective" parameterType="com.atguigu.crud.bean.Department">
    update tbl_dept
    <set>
      <if test="deptName != null">
        dept_name = #{deptName,jdbcType=VARCHAR},
      </if>
    </set>
    where dept_id = #{deptId,jdbcType=INTEGER}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.atguigu.crud.bean.Department">
    update tbl_dept
    set dept_name = #{deptName,jdbcType=VARCHAR}
    where dept_id = #{deptId,jdbcType=INTEGER}
  </update>
</mapper>

EmployeeMapper.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.atguigu.crud.dao.EmployeeMapper">
  <resultMap id="BaseResultMap" type="com.atguigu.crud.bean.Employee">
    <id column="emp_id" jdbcType="INTEGER" property="empId" />
    <result column="emp_name" jdbcType="VARCHAR" property="empName" />
    <result column="gender" jdbcType="CHAR" property="gender" />
    <result column="email" jdbcType="VARCHAR" property="email" />
    <result column="d_id" jdbcType="INTEGER" property="dId" />
  </resultMap>
  <resultMap type="com.atguigu.crud.bean.Employee" id="WithDeptResultMap">
      <id column="emp_id" jdbcType="INTEGER" property="empId" />
    <result column="emp_name" jdbcType="VARCHAR" property="empName" />
    <result column="gender" jdbcType="CHAR" property="gender" />
    <result column="email" jdbcType="VARCHAR" property="email" />
    <result column="d_id" jdbcType="INTEGER" property="dId" />
    <!-- 指定联合查询出的部门字段的封装 -->
    <association property="department" javaType="com.atguigu.crud.bean.Department">
        <id column="dept_id" property="deptId"/>
        <result column="dept_name" property="deptName"/>
    </association>
  </resultMap>
  <sql id="Example_Where_Clause">
    <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">
    <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">
    emp_id, emp_name, gender, email, d_id
  </sql>
  <sql id="WithDept_Column_List">
      e.emp_id, e.emp_name, e.gender, e.email, e.d_id,d.dept_id,d.dept_name
  </sql>
  <!--   List<Employee> selectByExampleWithDept(EmployeeExample example);
    Employee selectByPrimaryKeyWithDept(Integer empId); 
    -->
   <!-- 查询员工同时带部门信息 -->
  <select id="selectByExampleWithDept" resultMap="WithDeptResultMap">
       select
        <if test="distinct">
          distinct
        </if>
        <include refid="WithDept_Column_List" />
        FROM tbl_emp e
        left join tbl_dept d on e.`d_id`=d.`dept_id`
        <if test="_parameter != null">
          <include refid="Example_Where_Clause" />
        </if>
        <if test="orderByClause != null">
          order by ${orderByClause}
        </if>
  </select>
  <select id="selectByPrimaryKeyWithDept" resultMap="WithDeptResultMap">
       select 
    <include refid="WithDept_Column_List" />
    FROM tbl_emp e
    left join tbl_dept d on e.`d_id`=d.`dept_id`
    where emp_id = #{empId,jdbcType=INTEGER}
  </select>
  
  <!-- 查询员工不带部门信息的 -->
  <select id="selectByExample" parameterType="com.atguigu.crud.bean.EmployeeExample" resultMap="BaseResultMap">
    select
    <if test="distinct">
      distinct
    </if>
    <include refid="Base_Column_List" />
    from tbl_emp
    <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">
    select 
    <include refid="Base_Column_List" />
    from tbl_emp
    where emp_id = #{empId,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
    delete from tbl_emp
    where emp_id = #{empId,jdbcType=INTEGER}
  </delete>
  <delete id="deleteByExample" parameterType="com.atguigu.crud.bean.EmployeeExample">
    delete from tbl_emp
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
  </delete>
  <insert id="insert" parameterType="com.atguigu.crud.bean.Employee">
    insert into tbl_emp (emp_id, emp_name, gender, 
      email, d_id)
    values (#{empId,jdbcType=INTEGER}, #{empName,jdbcType=VARCHAR}, #{gender,jdbcType=CHAR}, 
      #{email,jdbcType=VARCHAR}, #{dId,jdbcType=INTEGER})
  </insert>
  <insert id="insertSelective" parameterType="com.atguigu.crud.bean.Employee">
    insert into tbl_emp
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="empId != null">
        emp_id,
      </if>
      <if test="empName != null">
        emp_name,
      </if>
      <if test="gender != null">
        gender,
      </if>
      <if test="email != null">
        email,
      </if>
      <if test="dId != null">
        d_id,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="empId != null">
        #{empId,jdbcType=INTEGER},
      </if>
      <if test="empName != null">
        #{empName,jdbcType=VARCHAR},
      </if>
      <if test="gender != null">
        #{gender,jdbcType=CHAR},
      </if>
      <if test="email != null">
        #{email,jdbcType=VARCHAR},
      </if>
      <if test="dId != null">
        #{dId,jdbcType=INTEGER},
      </if>
    </trim>
  </insert>
  <select id="countByExample" parameterType="com.atguigu.crud.bean.EmployeeExample" resultType="java.lang.Long">
    select count(*) from tbl_emp
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    </if>
  </select>
  <update id="updateByExampleSelective" parameterType="map">
    update tbl_emp
    <set>
      <if test="record.empId != null">
        emp_id = #{record.empId,jdbcType=INTEGER},
      </if>
      <if test="record.empName != null">
        emp_name = #{record.empName,jdbcType=VARCHAR},
      </if>
      <if test="record.gender != null">
        gender = #{record.gender,jdbcType=CHAR},
      </if>
      <if test="record.email != null">
        email = #{record.email,jdbcType=VARCHAR},
      </if>
      <if test="record.dId != null">
        d_id = #{record.dId,jdbcType=INTEGER},
      </if>
    </set>
    <if test="_parameter != null">
      <include refid="Update_By_Example_Where_Clause" />
    </if>
  </update>
  <update id="updateByExample" parameterType="map">
    update tbl_emp
    set emp_id = #{record.empId,jdbcType=INTEGER},
      emp_name = #{record.empName,jdbcType=VARCHAR},
      gender = #{record.gender,jdbcType=CHAR},
      email = #{record.email,jdbcType=VARCHAR},
      d_id = #{record.dId,jdbcType=INTEGER}
    <if test="_parameter != null">
      <include refid="Update_By_Example_Where_Clause" />
    </if>
  </update>
  <update id="updateByPrimaryKeySelective" parameterType="com.atguigu.crud.bean.Employee">
    update tbl_emp
    <set>
      <if test="empName != null">
        emp_name = #{empName,jdbcType=VARCHAR},
      </if>
      <if test="gender != null">
        gender = #{gender,jdbcType=CHAR},
      </if>
      <if test="email != null">
        email = #{email,jdbcType=VARCHAR},
      </if>
      <if test="dId != null">
        d_id = #{dId,jdbcType=INTEGER},
      </if>
    </set>
    where emp_id = #{empId,jdbcType=INTEGER}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.atguigu.crud.bean.Employee">
    update tbl_emp
    set emp_name = #{empName,jdbcType=VARCHAR},
      gender = #{gender,jdbcType=CHAR},
      email = #{email,jdbcType=VARCHAR},
      d_id = #{dId,jdbcType=INTEGER}
    where emp_id = #{empId,jdbcType=INTEGER}
  </update>
</mapper>

现在我们把ssm的框架整合起来了，我们接下来查看如何进行单位

接下来我们来查看如何进行单元测试，首先对dao层进行单元测试

首先我们来查看dao层的代码

我们对EmployeeMapper进行单元测试

package com.atguigu.crud.dao;

import com.atguigu.crud.bean.Employee;
import com.atguigu.crud.bean.EmployeeExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;

public interface EmployeeMapper {
    long countByExample(EmployeeExample example);

    int deleteByExample(EmployeeExample example);

    int deleteByPrimaryKey(Integer empId);

    int insert(Employee record);

    int insertSelective(Employee record);

    List<Employee> selectByExample(EmployeeExample example);

    Employee selectByPrimaryKey(Integer empId);

    int updateByExampleSelective(@Param("record") Employee record, @Param("example") EmployeeExample example);

    int updateByExample(@Param("record") Employee record, @Param("example") EmployeeExample example);

    int updateByPrimaryKeySelective(Employee record);
    List<Employee> selectByExampleWithDept(EmployeeExample example);

    Employee selectByPrimaryKeyWithDept(Integer empId);

    int updateByPrimaryKey(Employee record);
}

对于dao层的测试我们使用到了TestNg和dbunit已经spring-test-dbunit框架

eclipse本身不支持TestNg

我们需要下载Testng的插件不清楚的看自己的博客eclipse如何集成TestNg，这里下载TestNg的时候一定要注意TestNg的版本

org.testng.eclipse_6.8.6.20130607_0745，一定要使用6.8.6版本，但是自己下载的时候使用成了org.testng.eclipse_6.9.8.201510130443

高版本在运行testNg的时候出现了socket close的问题，使用了很久才解决

关于dbunit工具的时候请看视频孔浩老师junit单元测试dbunit工具的使用

在使用dbunit工具的使用使用到了一个

<!-- dbutil测试工具的引入依赖 -->
<dependency>
<groupId>com.github.springtestdbunit</groupId>
<artifactId>spring-test-dbunit</artifactId>
<version>1.2.0</version>
</dependency>

这个工具框架，很有用，我们来看具体的dao层的测试代码

 DaoTestByTestNG.java

package com.atguigu.crud.test;

import java.io.FileWriter;
import java.util.List;

import junit.framework.Assert;

import org.dbunit.database.DatabaseConnection;
import org.dbunit.database.IDatabaseConnection;
import org.dbunit.dataset.IDataSet;
import org.dbunit.dataset.xml.FlatXmlDataSet;
import org.dbunit.dataset.xml.FlatXmlProducer;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.TestExecutionListeners;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.test.context.support.DependencyInjectionTestExecutionListener;
import org.springframework.test.context.support.DirtiesContextTestExecutionListener;
import org.springframework.test.context.testng.AbstractTestNGSpringContextTests;
import org.springframework.test.context.transaction.TransactionConfiguration;
import org.springframework.test.context.web.WebAppConfiguration;
import org.springframework.transaction.annotation.Transactional;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;
import org.xml.sax.InputSource;

import com.atguigu.crud.bean.Employee;
import com.atguigu.crud.bean.EmployeeExample;
import com.atguigu.crud.bean.EmployeeExample.Criteria;
import com.atguigu.crud.dao.DepartmentMapper;
import com.atguigu.crud.dao.EmployeeMapper;
import com.github.springtestdbunit.DbUnitTestExecutionListener;
import com.github.springtestdbunit.annotation.DatabaseOperation;
import com.github.springtestdbunit.annotation.DatabaseSetup;
import com.github.springtestdbunit.annotation.DatabaseTearDown;
import com.github.springtestdbunit.annotation.DbUnitConfiguration;
import com.github.springtestdbunit.annotation.ExpectedDatabase;
import com.github.springtestdbunit.assertion.DatabaseAssertionMode;

/**
 * 对dao进行单元测试的类
 * classpath:/dbutils_xml/expect.xml
 * */

@SuppressWarnings("deprecation")
@ContextConfiguration(locations = {"classpath:applicationContext.xml",
        "classpath:dispatcher-servlet.xml" })
//配置事务的回滚,对数据库的增删改都会回滚,便于测试用例的循环利用
@TransactionConfiguration(transactionManager = "transactionManager", defaultRollback = true)
@Transactional
@TestExecutionListeners({DbUnitTestExecutionListener.class,
    DependencyInjectionTestExecutionListener.class,
    DirtiesContextTestExecutionListener.class})
// 如果在Spring Test DbUnit中不配置其他的数据源默认使用Spring容器中id="dataSource"的数据源，Spring Test DbUnit支持配置多数据源。
@DbUnitConfiguration(databaseConnection="pooledDataSource")

public class DaoTestByTestNG extends AbstractTestNGSpringContextTests  {

    
    @Autowired
    private DepartmentMapper departmentMapper;
    
    @Autowired
    private EmployeeMapper employeeMapper;
       
      @Test
      @DatabaseSetup(type=DatabaseOperation.CLEAN_INSERT,value="classpath:/dbutils_xml/setup.xml")//setup阶段执行clean_insert操作，数据导入到数据库中，在测试之前执行
      @ExpectedDatabase(assertionMode=DatabaseAssertionMode.NON_STRICT,value="classpath:/dbutils_xml/add_expect.xml")//将测试操作后的数据库数据与期望的xml数据进行比较是否相等，来判定测试是否通过，assertionMode设置比较的模式。跑完test后执行
      @DatabaseTearDown(type=DatabaseOperation.CLEAN_INSERT,value="classpath:/dbutils_xml/setup.xml")//恢复数据库中的数据，测试之后执行。
    public void testInsert() {
        System.out.println("insert");
        Employee employee = new Employee(13, "kebi", "M", "kebi@qq.com", 2);
        employeeMapper.insert(employee);
        Employee employee2 = employeeMapper.selectByPrimaryKey(13);
        Assert.assertNotNull(employee2);
        Assert.assertEquals(employee.getEmpId(), employee2.getEmpId());
        Assert.assertEquals(employee.getEmail(), employee2.getEmail());
        Assert.assertEquals(employee.getEmpName(), employee2.getEmpName());
    }
      
      
     /**
      * 修改联系人的操作
      * */ 
      @Test
      @DatabaseSetup(type=DatabaseOperation.CLEAN_INSERT,value="classpath:/dbutils_xml/setup.xml")//setup阶段执行clean_insert操作，数据导入到数据库中，在测试之前执行
      @ExpectedDatabase(assertionMode=DatabaseAssertionMode.NON_STRICT,value="classpath:/dbutils_xml/update_expect.xml")//将测试操作后的数据库数据与期望的xml数据进行比较是否相等，来判定测试是否通过，assertionMode设置比较的模式。跑完test后执行
      @DatabaseTearDown(type=DatabaseOperation.CLEAN_INSERT,value="classpath:/dbutils_xml/setup.xml")//恢复数据库中的数据，测试之后执行。
    public void testUpdate() {
        System.out.println("update");
        Employee employee = new Employee(12, "kebi", "M", "kebi@qq.com", 2);
        employeeMapper.updateByPrimaryKeySelective(employee);
        Employee employee2 = employeeMapper.selectByPrimaryKey(12);
        Assert.assertNotNull(employee2);
        Assert.assertEquals(employee.getEmpId(), employee2.getEmpId());
        Assert.assertEquals(employee.getEmail(), employee2.getEmail());
        Assert.assertEquals(employee.getEmpName(), employee2.getEmpName());
        
    }
      
    
      /**
       * 删除联系人的操作
       * */
      
         /**
          * 修改联系人的操作
          * */ 
          @Test
          @DatabaseSetup(type=DatabaseOperation.CLEAN_INSERT,value="classpath:/dbutils_xml/setup.xml")//setup阶段执行clean_insert操作，数据导入到数据库中，在测试之前执行
          @ExpectedDatabase(assertionMode=DatabaseAssertionMode.NON_STRICT,value="classpath:/dbutils_xml/delete_expect.xml")//将测试操作后的数据库数据与期望的xml数据进行比较是否相等，来判定测试是否通过，assertionMode设置比较的模式。跑完test后执行
          @DatabaseTearDown(type=DatabaseOperation.CLEAN_INSERT,value="classpath:/dbutils_xml/delete_expect.xml")//恢复数据库中的数据，测试之后执行。
        public void testDelete() {
            System.out.println("delete");
            int deleteByPrimaryKey = employeeMapper.deleteByPrimaryKey(12);
            //此处通过update操作返回的受影响行数来断定update操作是否执行成功
        }
   
          
          /**
           * 删除联系人的操作
           * */
          
             /**
              * 获得联系人的全部信息
              * */ 
              @Test
              @DatabaseSetup(type=DatabaseOperation.CLEAN_INSERT,value="classpath:/dbutils_xml/setup.xml")//setup阶段执行clean_insert操作，数据导入到数据库中，在测试之前执行
              @ExpectedDatabase(assertionMode=DatabaseAssertionMode.NON_STRICT,value="classpath:/dbutils_xml/setup.xml")//将测试操作后的数据库数据与期望的xml数据进行比较是否相等，来判定测试是否通过，assertionMode设置比较的模式。跑完test后执行
              @DatabaseTearDown(type=DatabaseOperation.CLEAN_INSERT,value="classpath:/dbutils_xml/setup.xml")//恢复数据库中的数据，测试之后执行。
            public void testGetAllEmployees() {
                System.out.println("testGetAllEmployees");
                EmployeeExample example = new EmployeeExample();
                Criteria createCriteria = example.createCriteria();
                List<Employee> list = employeeMapper.selectByExample(example);
                Assert.assertEquals(2, list.size());
                Assert.assertEquals("admin10", list.get(0).getEmpName());
                Assert.assertEquals("weqwe", list.get(1).getEmpName());
            }
 
    
            //备份数据库文件
                @BeforeClass
                public static void testBackup(){
                    try {
                        System.out.println("@BeforeClass");
                        IDatabaseConnection con = new DatabaseConnection(DBUtils.getConnection());
                        IDataSet createDataSet = con.createDataSet();
                        FlatXmlDataSet.write(createDataSet, new FileWriter("d:/test22.xml"));
                    } catch (Exception e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    
                }
                
                //还原数据库文件
                @AfterClass
                public static void testResume(){
                    try {
                        System.out.println("@AfterClass");
                        IDatabaseConnection con = new DatabaseConnection(DBUtils.getConnection());
                        IDataSet dataSet = new FlatXmlDataSet(new FlatXmlProducer(
                                new InputSource("d:/test22.xml")));
                        //清空数据库中的数据并插入xml中的数据
                        org.dbunit.operation.DatabaseOperation.CLEAN_INSERT.execute(con,dataSet);
                    } catch (Exception e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    
                }
            
            

                


}

接下来重点对上面的代码几个关键点进行备注下：

第一需要：使用Spring-Test对Spring框架进行单元测试，需要引入下面的java包

<!--spring单元测试依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${springframework}</version>
<scope>test</scope>
</dependency>

第二：因为采用的TestNg测试框架，没有使用junit测试框架，所以在编写的单元测试类都需要继承AbstractTestNGSpringContextTests

如果使用的是junit的测试框架，直接使用注解@RunWith(SpringJUnit4ClassRunner.class)

第三：在运行单元测试框架的时候，使用首先dbunit备份数据库中的真实数据，然后在测试的过程中使用测试数据，最后单元测试完成之后再把保存的真实数据

还原到数据库中

//备份数据库文件
                @BeforeClass
                public static void testBackup(){
                    try {
                        System.out.println("@BeforeClass");
                        IDatabaseConnection con = new DatabaseConnection(DBUtils.getConnection());
                        IDataSet createDataSet = con.createDataSet();
                        FlatXmlDataSet.write(createDataSet, new FileWriter("d:/test22.xml"));
                    } catch (Exception e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    
                }
                
                //还原数据库文件
                @AfterClass
                public static void testResume(){
                    try {
                        System.out.println("@AfterClass");
                        IDatabaseConnection con = new DatabaseConnection(DBUtils.getConnection());
                        IDataSet dataSet = new FlatXmlDataSet(new FlatXmlProducer(
                                new InputSource("d:/test22.xml")));
                        //清空数据库中的数据并插入xml中的数据
                        org.dbunit.operation.DatabaseOperation.CLEAN_INSERT.execute(con,dataSet);
                    } catch (Exception e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                    
                }
            

第四：spring-test-dbunit框架的使用