基础环境搭建

1、创建一个maven工程
2、引入项目依赖的jar包
• spring
• springmvc
• mybatis
• 数据库连接池，驱动包
• 其他（jstl，servlet-api，junit）
3、引入bootstrap前端框架
4、编写ssm整合的关键配置文件
• web.xml，spring,springmvc,mybatis，使用mybatis的逆向工程生成对应的bean以
及mapper
5、测试mapper

项目图片:

pom.xml:

<!--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>jstl</groupId>        <artifactId>jstl</artifactId>        <version>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></dependencies>

web.xml:

<?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_2_5.xsd"    id="WebApp_ID" version="2.5">    <!--1、启动Spring的容器 -->    <!-- needed for ContextLoaderListener -->    <context-param>        <param-name>contextConfigLocation</param-name>        <param-value>classpath:applicationContext.xml</param-value>    </context-param>    <!-- Bootstraps the root web application context before servlet initialization -->    <listener>        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>    </listener>    <!--2、springmvc的前端控制器，拦截所有请求 -->    <!-- The front controller of this Spring Web application, responsible for         handling all application requests -->    <servlet>        <servlet-name>dispatcherServlet</servlet-name>        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>        <load-on-startup>1</load-on-startup>    </servlet>    <!-- Map all requests to the DispatcherServlet for handling -->    <servlet-mapping>        <servlet-name>dispatcherServlet</servlet-name>        <url-pattern>/</url-pattern>    </servlet-mapping>    <!-- 3、字符编码过滤器，一定要放在所有过滤器之前 -->    <filter>        <filter-name>CharacterEncodingFilter</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>forceRequestEncoding</param-name>            <param-value>true</param-value>        </init-param>        <init-param>            <param-name>forceResponseEncoding</param-name>            <param-value>true</param-value>        </init-param>    </filter>    <filter-mapping>        <filter-name>CharacterEncodingFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <!-- 4、使用Rest风格的URI，将页面普通的post请求转为指定的delete或者put请求 -->    <filter>        <filter-name>HiddenHttpMethodFilter</filter-name>        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>HiddenHttpMethodFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping>    <filter>        <filter-name>HttpPutFormContentFilter</filter-name>        <filter-class>org.springframework.web.filter.HttpPutFormContentFilter</filter-class>    </filter>    <filter-mapping>        <filter-name>HttpPutFormContentFilter</filter-name>        <url-pattern>/*</url-pattern>    </filter-mapping></web-app>

dispatcherServlet-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:context="http://www.springframework.org/schema/context"    xmlns:mvc="http://www.springframework.org/schema/mvc"    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-3.2.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">    <!--SpringMVC的配置文件，包含网站跳转逻辑的控制，配置  -->    <context:component-scan base-package="com.zhou" use-default-filters="false">        <!--只扫描控制器。  -->        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>    </context:component-scan>    <!--配置视图解析器，方便页面返回  -->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="prefix" value="/WEB-INF/views/"></property>        <property name="suffix" value=".jsp"></property>    </bean>    <!--两个标准配置  -->    <!-- 将springmvc不能处理的请求交给tomcat -->    <mvc:default-servlet-handler/>    <!-- 能支持springmvc更高级的一些功能，JSR303校验，快捷的ajax...映射动态请求 -->    <mvc:annotation-driven/></beans>

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">    <context:component-scan base-package="com.zhou">        <context:exclude-filter type="annotation"            expression="org.springframework.stereotype.Controller" />    </context:component-scan>    <!-- Spring的配置文件，这里主要配置和业务逻辑有关的 -->    <!--=================== 数据源，事务控制，xxx ================-->    <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>        <property name="dataSource" ref="pooledDataSource"></property>        <!-- 指定mybatis，mapper文件的位置 -->        <property name="mapperLocations" value="classpath:mapper/*.xml"></property>    </bean>    <!-- 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.zhou.dao"></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>    <!--=============================================  -->    <!-- ===============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）  -->    <aop:config>        <!-- 切入点表达式 -->        <aop:pointcut expression="execution(* com.zhou.service..*(..))" id="txPoint"/>        <!-- 配置事务增强 -->        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/>    </aop:config>    <!--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>    <!-- Spring配置文件的核心点（数据源、与mybatis的整合，事务控制） --></beans>

dbconfig.properties:

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/ssm_crudjdbc.driverClass=com.mysql.jdbc.Driverjdbc.user=rootjdbc.password=123456

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>    <settings>        <setting name="mapUnderscoreToCamelCase" value="true"/>    </settings>    <typeAliases>        <package name="com.zhou.bean"/>    </typeAliases>    <plugins>        <plugin interceptor="com.github.pagehelper.PageInterceptor">            <!--分页参数合理化  -->            <property name="reasonable" value="true"/>        </plugin>    </plugins></configuration>

MyBatis逆向工程:

1.pom.xml:

<!-- 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>

2.ssm_crud.sql:

DROP TABLE IF EXISTS `tbl_dept`;CREATE TABLE `tbl_dept` (  `dept_id` int(11) NOT NULL AUTO_INCREMENT,  `dept_name` varchar(255) NOT NULL,  PRIMARY KEY (`dept_id`)) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;-- ------------------------------ Records of tbl_dept-- ----------------------------INSERT INTO `tbl_dept` VALUES ('1', '开发部');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) NOT NULL,  `gender` char(1) DEFAULT NULL,  `email` varchar(255) DEFAULT NULL,  `d_id` int(11) DEFAULT NULL,  PRIMARY KEY (`emp_id`),  KEY `d_id` (`d_id`),  CONSTRAINT `tbl_emp_ibfk_1` FOREIGN KEY (`d_id`) REFERENCES `tbl_dept` (`dept_id`)) ENGINE=InnoDB AUTO_INCREMENT=22 DEFAULT CHARSET=utf8;-- ------------------------------ Records of tbl_emp-- ----------------------------INSERT INTO `tbl_emp` VALUES ('1', 'Jerry', 'M', '[e-mail]', '1');INSERT INTO `tbl_emp` VALUES ('2', 'Jerry', 'M', '[e-mail]', '1');

3.mbg.xml:

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE generatorConfigurationPUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN""http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"><generatorConfiguration>    <context id="DB2Tables" targetRuntime="MyBatis3">        <!-- 生成没有注释的代码 -->        <commentGenerator>            <property name="suppressAllComments" value="true" />        </commentGenerator>        <!-- 配置数据库连接 -->        <jdbcConnection driverClass="com.mysql.jdbc.Driver"            connectionURL="jdbc:mysql://localhost:3306/ssm_crud" userId="root"            password="123456">        </jdbcConnection>        <javaTypeResolver>            <property name="forceBigDecimals" value="false" />        </javaTypeResolver>        <!-- 指定javaBean生成的位置 -->        <javaModelGenerator targetPackage="com.zhou.bean"            targetProject=".\src\main\java">            <property name="enableSubPackages" value="true" />            <property name="trimStrings" value="true" />        </javaModelGenerator>        <!--指定sql映射文件生成的位置 -->        <sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">            <property name="enableSubPackages" value="true" />        </sqlMapGenerator>        <!-- 指定dao接口生成的位置，mapper接口 -->        <javaClientGenerator type="XMLMAPPER"            targetPackage="com.zhou.dao" targetProject=".\src\main\java">            <property name="enableSubPackages" value="true" />        </javaClientGenerator>        <!-- table指定每个表的生成策略 -->        <table tableName="tbl_emp" domainObjectName="Employee"></table>        <table tableName="tbl_dept" domainObjectName="Department"></table>    </context></generatorConfiguration>

4.MBGTest.java—运行生成代码:

public class MBGTest {    public static void main(String[] args) throws Exception {        List<String> warnings = new ArrayList<String>();        boolean overwrite = true;        File configFile = new File("mbg.xml");        ConfigurationParser cp = new ConfigurationParser(warnings);        Configuration config = cp.parseConfiguration(configFile);        DefaultShellCallback callback = new DefaultShellCallback(overwrite);        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,                callback, warnings);        myBatisGenerator.generate(null);    }}

5.对生成的逆向工程代码进行相应的修改:

1.EmployeeMapper.java中添加:

List<Employee> selectByExampleWithDept(EmployeeExample example);Employee selectByPrimaryKeyWithDept(Integer empId); 

2.EmployeeMapper.xml中添加:

<!-- 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><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><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><resultMap type="com.zhou.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.zhou.bean.Department">        <id column="dept_id" property="deptId" />        <result column="dept_name" property="deptName" />    </association></resultMap>

3.Employee.java中添加:

//希望查询员工的同时部门信息也是查询好的private Department department;public Department getDepartment() {    return department;}public void setDepartment(Department department) {    this.department = department;}

测试 Mapper-MapperTest.java:

/** * 测试dao层的工作 * @author lfy *推荐Spring的项目就可以使用Spring的单元测试，可以自动注入我们需要的组件 *1、导入SpringTest模块 *2、@ContextConfiguration指定Spring配置文件的位置 *3、直接autowired要使用的组件即可 */@RunWith(SpringJUnit4ClassRunner.class)@ContextConfiguration(locations={"classpath:applicationContext.xml"})public class MapperTest {    @Autowired    DepartmentMapper departmentMapper;    @Autowired    EmployeeMapper employeeMapper;    @Autowired    SqlSession sqlSession;    /**     * 测试DepartmentMapper     */    @Test    public void testCRUD(){    /*  //1、创建SpringIOC容器        ApplicationContext ioc = new ClassPathXmlApplicationContext("applicationContext.xml");        //2、从容器中获取mapper        DepartmentMapper bean = ioc.getBean(DepartmentMapper.class);*/        System.out.println(departmentMapper);        //1、插入几个部门//      departmentMapper.insertSelective(new Department(null, "开发部"));//      departmentMapper.insertSelective(new Department(null, "测试部"));        //2、生成员工数据，测试员工插入        employeeMapper.insertSelective(new Employee(null, "Jerry", "M", "[e-mail]", 1));        //3、批量插入多个员工；批量，使用可以执行批量操作的sqlSession。//      for(){//          employeeMapper.insertSelective(new Employee(null, , "M", "[e-mail]", 1));//      }        EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);        for(int i = 0;i<1000;i++){            String uid = UUID.randomUUID().toString().substring(0,5)+i;            mapper.insertSelective(new Employee(null,uid, "M", uid+"@zhou.com", 1));        }        System.out.println("批量完成");    }}

注意事项:

1.测试Mapper时使用到了有参构造方法，在Employee.java中添加有参构造方法时记得添加无参的构造方法