SSM的练习 :
        1开发环境
        数据库：mysql5.5以上版本。
        Jdk：1.7
        开发环境：Eclipse mars2
        Spring：4.2.4
        Mybatis：3.2.7
        Tomcat：7
        2数据库
        数据库使用mysql 数据库。

        1、创建crm数据库
        2、将参考资料中的sql脚本导入到数据库中

        3工程搭建
        工程使用Springmvc、spring、mybatis框架整合完成。

        Dao层：SqlMapConfig.xml(空)
                applicationContext-dao.xml:数据库连接池、SqlSessionFactory、Mapper的扫描器。
        Service层：
            配置包扫描器，扫描所有带@Service注解的类。事务管理器、切面。
        表现层：
                Springmvc.xml:包扫描器@Controller、配置注解驱动、视图解析器。
                Jsp：bootstrap
        Web.xml:配置spring监听器，前端控制器。
        3.1SqlMapConfig.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>

        </configuration>
        3.2applicationContext-dao.xml
        <beans xmlns="http://www.springframework.org/schema/beans"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
            xmlns:context="http://www.springframework.org/schema/context"
            xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
            xmlns:task="http://www.springframework.org/schema/task" 
            xsi:schemaLocation="http://www.springframework.org/schema/beans 
                http://www.springframework.org/schema/beans/spring-beans-4.2.xsd 
                http://www.springframework.org/schema/mvc 
                http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd 
                http://www.springframework.org/schema/context 
                http://www.springframework.org/schema/context/spring-context-4.2.xsd 
                http://www.springframework.org/schema/aop 
                http://www.springframework.org/schema/aop/spring-aop-4.2.xsd 
                http://www.springframework.org/schema/tx 
                http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
                http://www.springframework.org/schema/task
                http://www.springframework.org/schema/task/spring-task-4.2.xsd">

            <!-- 配置 读取properties文件 jdbc.properties -->
            <context:property-placeholder location="classpath:jdbc.properties" />

            <!-- 配置 数据源 -->
            <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
                <!-- 驱动 -->
                <property name="driverClassName" value="${jdbc.driver}" />
                <!-- url -->
                <property name="url" value="${jdbc.url}" />
                <!-- 用户名 -->
                <property name="username" value="${jdbc.username}" />
                <!-- 密码 -->
                <property name="password" value="${jdbc.password}" />
            </bean>

            <!-- 配置 Mybatis的工厂 -->
            <bean class="org.mybatis.spring.SqlSessionFactoryBean">
                <!-- 数据源 -->
                <property name="dataSource" ref="dataSource" />
                <!-- 配置Mybatis的核心 配置文件所在位置 -->
                <property name="configLocation" value="classpath:SqlMapConfig.xml" />
                <!-- 配置pojo别名 -->
                <property name="typeAliasesPackage" value="cn.baidu.core.bean"></property>
            </bean>

            <!-- 配置 1：原始Dao开发 接口实现类 Mapper.xml 三个 2：接口开发 接口 不写实现类 Mapper.xml 二个 （UserDao、ProductDao 
                、BrandDao。。。。。。。） 3：接口开发、并支持扫描 cn.baidu.core.dao(UserDao。。。。。） 写在此包下即可被扫描到 -->
            <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
                <property name="basePackage" value="cn.baidu.core.dao" />
            </bean>

        </beans>

        Jdbc.properties
        jdbc.driver=com.mysql.jdbc.Driver
        jdbc.url=jdbc:mysql://localhost:3306/crm?characterEncoding=utf-8
        jdbc.username=root
        jdbc.password=root
        3.3applicationContext-service.xml
        <beans xmlns="http://www.springframework.org/schema/beans"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
            xmlns:context="http://www.springframework.org/schema/context"
            xmlns:aop="http://www.springframework.org/schema/aop" 
            xmlns:tx="http://www.springframework.org/schema/tx"
            xmlns:task="http://www.springframework.org/schema/task"
            xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
            xsi:schemaLocation="http://www.springframework.org/schema/beans 
                http://www.springframework.org/schema/beans/spring-beans-4.2.xsd 
                http://www.springframework.org/schema/mvc 
                http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd 
                http://www.springframework.org/schema/context 
                http://www.springframework.org/schema/context/spring-context-4.2.xsd 
                http://www.springframework.org/schema/aop 
                http://www.springframework.org/schema/aop/spring-aop-4.2.xsd 
                http://www.springframework.org/schema/tx 
                http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
                http://www.springframework.org/schema/task
                http://www.springframework.org/schema/task/spring-task-4.2.xsd
                http://code.alibabatech.com/schema/dubbo        
                http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
                
                
                <!-- 配置  扫描   @Service -->
                <context:component-scan base-package="cn.baidu.core.service"/>
                
                
                
        </beans>

        3.4applicationContext-trans.xml
        <?xml version="1.0" encoding="UTF-8"?>
        <beans xmlns="http://www.springframework.org/schema/beans"
            xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
            xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
            http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
            http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd">
            <!-- 事务管理器 -->
            <bean id="transactionManager"
                class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
                <!-- 数据源 -->
                <property name="dataSource" ref="dataSource" />
            </bean>
            <!-- 通知 -->
            <tx:advice id="txAdvice" transaction-manager="transactionManager">
                <tx:attributes>
                    <!-- 传播行为 -->
                    <tx:method name="save*" propagation="REQUIRED" />
                    <tx:method name="insert*" propagation="REQUIRED" />
                    <tx:method name="add*" propagation="REQUIRED" />
                    <tx:method name="create*" propagation="REQUIRED" />
                    <tx:method name="delete*" propagation="REQUIRED" />
                    <tx:method name="update*" propagation="REQUIRED" />
                    <tx:method name="find*" propagation="SUPPORTS" read-only="true" />
                    <tx:method name="select*" propagation="SUPPORTS" read-only="true" />
                    <tx:method name="get*" propagation="SUPPORTS" read-only="true" />
                </tx:attributes>
            </tx:advice>
            <!-- 切面 -->
            <aop:config>
                <aop:advisor advice-ref="txAdvice"
                    pointcut="execution(* cn.baidu.core.service.*.*(..))" />
            </aop:config>
        </beans>
        3.5Springmvc.xml
        <beans xmlns="http://www.springframework.org/schema/beans"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
            xmlns:context="http://www.springframework.org/schema/context"
            xmlns:aop="http://www.springframework.org/schema/aop" 
            xmlns:tx="http://www.springframework.org/schema/tx"
            xmlns:task="http://www.springframework.org/schema/task"
            xsi:schemaLocation="http://www.springframework.org/schema/beans 
                http://www.springframework.org/schema/beans/spring-beans-4.2.xsd 
                http://www.springframework.org/schema/mvc 
                http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd 
                http://www.springframework.org/schema/context 
                http://www.springframework.org/schema/context/spring-context-4.2.xsd 
                http://www.springframework.org/schema/aop 
                http://www.springframework.org/schema/aop/spring-aop-4.2.xsd 
                http://www.springframework.org/schema/tx 
                http://www.springframework.org/schema/tx/spring-tx-4.2.xsd
                http://www.springframework.org/schema/task
                http://www.springframework.org/schema/task/spring-task-4.2.xsd">        
                <!-- 加载属性文件 -->
                <context:property-placeholder location="classpath:resource.properties"/>
                <!-- 配置扫描 器 -->
                <context:component-scan base-package="cn.baidu.core.web.controller"/>
                <!-- 配置处理器映射器  适配器 -->
                <mvc:annotation-driven/>
                
                <!-- 配置视图解释器 jsp -->
                <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
                    <property name="prefix" value="/WEB-INF/jsp/"/>
                    <property name="suffix" value=".jsp"/>
                </bean>
                
        </beans>

        3.6Web.xml
        <?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">
            <welcome-file-list>
                <welcome-file>customer.action</welcome-file>
            </welcome-file-list>
            <!-- 上下文的位置 -->
            <context-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:applicationContext-*.xml</param-value>
            </context-param>
            <!-- Spring的监听器 -->
            <listener>
                <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
            </listener>


            <!-- POST提交过滤器 UTF-8 -->
            <filter>
                <filter-name>encoding</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>encoding</filter-name>
                <url-pattern>*.action</url-pattern>
            </filter-mapping>
            <!-- 前端控制器 -->
            <servlet>
                <servlet-name>crm</servlet-name>
                <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
                <init-param>
                    <param-name>contextConfigLocation</param-name>
                    <!-- 此处不配置 默认找 /WEB-INF/[servlet-name]-servlet.xml -->
                    <param-value>classpath:springmvc.xml</param-value>
                </init-param>
                <load-on-startup>1</load-on-startup>
            </servlet>
            <servlet-mapping>
                <servlet-name>crm</servlet-name>
                <!-- 1:*.do *.action 拦截以.do结尾的请求 (不拦截 jsp png jpg .js .css) 2:/ 拦截所有请求 
                    （不拦截.jsp) 建议使用此种 方式 （拦截 .js.css .png) (放行静态资源） 3:/* 拦截所有请求（包括.jsp) 此种方式 不建议使用 -->
                <url-pattern>*.action</url-pattern>
            </servlet-mapping>
        </web-app>


        3.7加入jsp及分页标签

        Tld文件需要放到WEB-INF目录下， tomcat的规定。当tomcat启动时会自动加载。

        Jsp中使用标签：



        4查询条件初始化
        4.1需求

        初始化查询条件下拉列表。

        4.2Sql
        SELECT * from base_dict WHERE dict_type_code='006'
        4.3Dao
        <?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.baidu.crm.dao.BaseDictDao">
            <select id="getBaseDictList" parameterType="string" resultType="BaseDict">
                SELECT * from base_dict WHERE dict_type_code=#{typeCode}
            </select>
        </mapper>

        4.4Service
        @Service
        public class BaseDictServiceImpl implements BaseDictService {

            @Autowired
            private BaseDictDao baseDictDao;
            
            @Override
            public List<BaseDict> getBaseDictList(String typeCode) {
                List<BaseDict> list = baseDictDao.getBaseDictList(typeCode);
                return list;
            }

        }

        4.5Controller












        规则：子容器可以访问父容器的对象，父容器不能访问子容器的对象。
        public class CustomerController {
            
            @Autowired
            private BaseDictService baseDictService;
            @Value("${customer.source.code}")
            private String CustomerSourceCode;
            @Value("${customer.industry.code}")
            private String CustomerIndustryCode;
            @Value("${customer.level.code}")
            private String CustomerLevelCode;

            @RequestMapping("/list")
            public String showCustomerList(Model model) {
                //查询字典表初始化下拉列表
                List<BaseDict> custSourceList = baseDictService.getBaseDictList(CustomerSourceCode);
                List<BaseDict> custIndustryList = baseDictService.getBaseDictList(CustomerIndustryCode);
                List<BaseDict> custLevelList = baseDictService.getBaseDictList(CustomerLevelCode);
                //把列表传递给jsp页面
                model.addAttribute("fromType", custSourceList);
                model.addAttribute("industryType", custIndustryList);
                model.addAttribute("levelType", custLevelList);
                
                return "customer";
            }
        }

        5客户列表展示
        5.1需求

        展示商品列表，并且可以根据查询条件过滤查询结果，并且实现分页处理。

        5.2Sql
        SELECT
            a.cust_id,
            a.cust_name,
            a.cust_user_id,
            a.cust_create_id,
            b.dict_item_name cust_source,
            c.dict_item_name cust_industry,
            d.dict_item_name cust_level,
            a.cust_linkman,
            a.cust_phone,
            a.cust_mobile,
            a.cust_zipcode,
            a.cust_address,
            a.cust_createtime
        FROM
            customer a
        LEFT JOIN base_dict b ON a.cust_source = b.dict_id
        LEFT JOIN base_dict c ON a.cust_industry = c.dict_id
        LEFT JOIN base_dict d ON a.cust_level = d.dict_id
        WHERE
            cust_name LIKE '%马%'
        AND cust_source = 6
        AND cust_industry = 2
        AND cust_level = 22

        5.3Dao
        <select id="getCustList" parameterType="QueryVo" resultType="customer">
                SELECT
                    a.cust_id,
                    a.cust_name,
                    a.cust_user_id,
                    a.cust_create_id,
                    b.dict_item_name cust_source,
                    c.dict_item_name cust_industry,
                    d.dict_item_name cust_level,
                    a.cust_linkman,
                    a.cust_phone,
                    a.cust_mobile,
                    a.cust_zipcode,
                    a.cust_address,
                    a.cust_createtime
                FROM
                    customer a
                LEFT JOIN base_dict b ON a.cust_source = b.dict_id
                LEFT JOIN base_dict c ON a.cust_industry = c.dict_id
                LEFT JOIN base_dict d ON a.cust_level = d.dict_id
                <where>
                    <if test="custName!=null and custName!=''">
                        AND    cust_name LIKE '%${custName}%'
                    </if>
                    <if test="custSource!=null and custSource!=''">
                        AND cust_source = #{custSource}
                    </if>
                    <if test="custIndustry!=null and custIndustry!=''">
                        AND cust_industry = #{custIndustry}
                    </if>
                    <if test="custLevel!=null and custLevel!=''">
                        AND cust_level = #{custLevel}
                    </if>
                </where>
                LIMIT #{start},#{rows}
            </select>

        增加count后的dao
        <mapper namespace="com.baidu.crm.dao.CustomerDao">
            
            <sql id="cust_query_where">
                <where>
                    <if test="custName!=null and custName!=''">
                        AND    cust_name LIKE '%${custName}%'
                    </if>
                    <if test="custSource!=null and custSource!=''">
                        AND cust_source = #{custSource}
                    </if>
                    <if test="custIndustry!=null and custIndustry!=''">
                        AND cust_industry = #{custIndustry}
                    </if>
                    <if test="custLevel!=null and custLevel!=''">
                        AND cust_level = #{custLevel}
                    </if>
                </where>
            </sql>
            
            <select id="getCustList" parameterType="QueryVo" resultType="customer">
                SELECT
                    a.cust_id,
                    a.cust_name,
                    a.cust_user_id,
                    a.cust_create_id,
                    b.dict_item_name cust_source,
                    c.dict_item_name cust_industry,
                    d.dict_item_name cust_level,
                    a.cust_linkman,
                    a.cust_phone,
                    a.cust_mobile,
                    a.cust_zipcode,
                    a.cust_address,
                    a.cust_createtime
                FROM
                    customer a
                LEFT JOIN base_dict b ON a.cust_source = b.dict_id
                LEFT JOIN base_dict c ON a.cust_industry = c.dict_id
                LEFT JOIN base_dict d ON a.cust_level = d.dict_id
                <include refid="cust_query_where"/>
                LIMIT #{start},#{rows}
            </select>
            <select id="getCustListCount" parameterType="QueryVo" resultType="int">
                SELECT count(*)
                FROM
                    customer a
                LEFT JOIN base_dict b ON a.cust_source = b.dict_id
                LEFT JOIN base_dict c ON a.cust_industry = c.dict_id
                LEFT JOIN base_dict d ON a.cust_level = d.dict_id
                <include refid="cust_query_where"/>
            </select>
        </mapper>

        5.4Service
        根据查询条件查询数据库得到客户列表。分页条件。
        接收查询条件QueryVo接收，使用page接收页码。
        1、通过page计算start。
        2、调用dao查询客户列表。
        3、做count处理。计算出此查询条件*查询到多少条记录。

        返回结果：Page对象。
        条件：QueryVo
        @Service
        public class CustomerServiceImpl implements CustomerService {

            @Autowired
            private CustomerDao customerDao;
            
            @Override
            public Page<Customer> getCustList(QueryVo queryVo) {
        queryVo.setStart((queryVo.getPage() - 1) * queryVo.getRows());
                List<Customer> custList = customerDao.getCustList(queryVo);
                Page<Customer> page = new Page<Customer>();
                //设置客户列表
                page.setRows(custList);
                page.setPage(queryVo.getPage());
                page.setSize(queryVo.getRows());
                //计算查询总记录数
                int total = customerDao.getCustListCount(queryVo);
                page.setTotal(total);
                return page;
            }

        }

        5.5Controller
        5.5.1分析
        1、接收页面提交的查询参数：
        保证jsp页面提交的表单中的input 的name属性和QueryVo中的属性一致
        2、调用Service查询客户列表
        3、把客户列表传递给页面。


        @RequestMapping("/list")
            public String showCustomerList(Model model, QueryVo queryVo) throws Exception {
                
                String custName = queryVo.getCustName();
                if (custName != null && !"".equals(custName)) {
                    custName = new String(custName.getBytes("iso8859-1"), "utf-8");
                    queryVo.setCustName(custName);
                }
                //查询字典表初始化下拉列表
                List<BaseDict> custSourceList = baseDictService.getBaseDictList(CustomerSourceCode);
                List<BaseDict> custIndustryList = baseDictService.getBaseDictList(CustomerIndustryCode);
                List<BaseDict> custLevelList = baseDictService.getBaseDictList(CustomerLevelCode);
                //查询客户列表
                Page<Customer> page = customerService.getCustList(queryVo);
                //把page放到request中
                model.addAttribute("page", page);
                
                //把列表传递给jsp页面
                model.addAttribute("fromType", custSourceList);
                model.addAttribute("industryType", custIndustryList);
                model.addAttribute("levelType", custLevelList);
                
                //页面回显
                model.addAttribute("custName", queryVo.getCustName());
                model.addAttribute("custSource", queryVo.getCustSource());
                model.addAttribute("custIndustry", queryVo.getCustIndustry());
                model.addAttribute("custLevel", queryVo.getCustLevel());
                
                
                return "customer";
            }


        6修改客户信息
        6.1需求

        1、点击客户列表中的“修改”按钮弹出客户信息修改对话框，并初始化客户信息
        2、点击“保存修改”按钮将修改后的结果保存到数据库中

        6.2展示客户信息

        6.2.1分析
        请求的url：
        customer/edit.action
        参数：cust_id客户id
        返回值：响应json数据，直接由Customer转换而来。需要使用@ResponseBody注解。

        6.2.2Dao层
        根据客户id查询客户信息。
        <select id="getCustomerById" parameterType="long" resultType="customer">
                select * from customer where cust_id = #{custId}
            </select>

        6.2.3Service层
            @Override
            public Customer getCustomerById(long custId) {
                Customer customer = customerDao.getCustomerById(custId);
                return customer;
            }

        6.2.4Controller
        要求返回json数据
        请求的url：
        customer/edit.action
        参数：cust_id客户id
        返回值：响应json数据
        @RequestMapping("/edit")
            @ResponseBody
            public Customer getCustomerById(Long id) {
                Customer customer = customerService.getCustomerById(id);
                return customer;
            }


        6.3提交修改
        6.3.1分析
        请求的url：customer/update.action
        请求的方法：post
        参数：表单中的数据。
        返回结果：OK

        6.3.2Dao层
        <update id="updateCustomerById" parameterType="customer">
                UPDATE customer
                <set>
                    <if test="cust_name!=null">
                    cust_name=#{cust_name},
                    </if>
                    <if test="cust_user_id!=null">
                    cust_user_id=#{cust_user_id},
                    </if>
                    <if test="cust_create_id!=null">
                    cust_create_id=#{cust_create_id},
                    </if>
                    <if test="cust_source!=null">
                    cust_source=#{cust_source},
                    </if>
                    <if test="cust_industry!=null">
                    cust_industry=#{cust_industry},
                    </if>
                    <if test="cust_level!=null">
                    cust_level=#{cust_level},
                    </if>
                    <if test="cust_linkman!=null">
                    cust_linkman=#{cust_linkman},
                    </if>
                    <if test="cust_phone!=null">
                    cust_phone=#{cust_phone},
                    </if>
                    <if test="cust_mobile!=null">
                    cust_mobile=#{cust_mobile},
                    </if>
                    <if test="cust_zipcode!=null">
                    cust_zipcode=#{cust_zipcode},
                    </if>
                    <if test="cust_address!=null">
                    cust_address=#{cust_address},
                    </if>
                    <if test="cust_createtime!=null">
                    cust_createtime=#{cust_createtime},
                    </if>
                </set>
                WHERE
                    cust_id = #{cust_id}
            </update>
        6.3.3Service层
        @Override
            public void updateCustomerById(Customer customer) {
                customerDao.updateCustomerById(customer);
            }

        6.3.4Controller
        接收参数：Customer接收。
        响应结果：OK字符串。使用@ResponseBody
        请求的url：customer/update.action
        @RequestMapping(value="/update", method=RequestMethod.POST)
            @ResponseBody
            public String updateCustomer(Customer customer) {
                customerService.updateCustomerById(customer);
                //直接向浏览器响应字符串需要使用@ResponseBody
                return "OK";
                
            }

        7删除客户
        7.1需求

        点击客户列表中的删除按钮，提示“警告信息”

        点击确定后删除用户信息，并刷新页面。

        分析：
        请求的url：customer/delete.action

        参数：id（客户id）
        响应的内容：OK（字符串需要使用@ResponseBody）