e3mall——项目搭建

一、Maven项目搭建

1）在父工程中进行依赖管理，并没有导入jar包

  1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  2          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  3     <modelVersion>4.0.0</modelVersion>
  4     <groupId>cn.e3mall</groupId>
  5     <artifactId>e3-parent</artifactId>
  6     <version>0.0.1-SNAPSHOT</version>
  7     <modules>
  8         <module>e3-common</module>
  9         <module>e3-manager</module>
 10     </modules>
 11     <packaging>pom</packaging>
 12     <!-- 集中定义依赖版本号 -->
 13     <properties>
 14         <junit.version>4.12</junit.version>
 15         <spring.version>4.2.4.RELEASE</spring.version>
 16         <mybatis.version>3.2.8</mybatis.version>
 17         <mybatis.spring.version>1.2.2</mybatis.spring.version>
 18         <mybatis.paginator.version>1.2.15</mybatis.paginator.version>
 19         <mysql.version>5.1.32</mysql.version>
 20         <slf4j.version>1.6.4</slf4j.version>
 21         <jackson.version>2.4.2</jackson.version>
 22         <druid.version>1.0.9</druid.version>
 23         <httpclient.version>4.3.5</httpclient.version>
 24         <jstl.version>1.2</jstl.version>
 25         <servlet-api.version>2.5</servlet-api.version>
 26         <jsp-api.version>2.0</jsp-api.version>
 27         <joda-time.version>2.5</joda-time.version>
 28         <commons-lang3.version>3.3.2</commons-lang3.version>
 29         <commons-io.version>1.3.2</commons-io.version>
 30         <commons-net.version>3.3</commons-net.version>
 31         <pagehelper.version>3.2.3</pagehelper.version>
 32         <!--<pagehelper.version>3.4.2-fix</pagehelper.version>-->
 33         <jsqlparser.version>0.9.1</jsqlparser.version>
 34         <commons-fileupload.version>1.3.1</commons-fileupload.version>
 35         <jedis.version>2.7.2</jedis.version>
 36         <solrj.version>4.10.3</solrj.version>
 37         <dubbo.version>2.5.3</dubbo.version>
 38         <zookeeper.version>3.4.7</zookeeper.version>
 39         <zkclient.version>0.1</zkclient.version>
 40         <activemq.version>5.11.2</activemq.version>
 41         <freemarker.version>2.3.23</freemarker.version>
 42         <quartz.version>2.2.2</quartz.version>
 43     </properties>
 44 
 45     <!--这里只是对依赖进行管理，并没有导入jar包-->
 46     <dependencyManagement>
 47         <dependencies>
 48             <!-- 时间操作组件 -->
 49             <dependency>
 50                 <groupId>joda-time</groupId>
 51                 <artifactId>joda-time</artifactId>
 52                 <version>${joda-time.version}</version>
 53             </dependency>
 54             <!-- Apache工具组件 -->
 55             <dependency>
 56                 <groupId>org.apache.commons</groupId>
 57                 <artifactId>commons-lang3</artifactId>
 58                 <version>${commons-lang3.version}</version>
 59             </dependency>
 60             <dependency>
 61                 <groupId>org.apache.commons</groupId>
 62                 <artifactId>commons-io</artifactId>
 63                 <version>${commons-io.version}</version>
 64             </dependency>
 65             <dependency>
 66                 <groupId>commons-net</groupId>
 67                 <artifactId>commons-net</artifactId>
 68                 <version>${commons-net.version}</version>
 69             </dependency>
 70             <!-- Jackson Json处理工具包 -->
 71             <dependency>
 72                 <groupId>com.fasterxml.jackson.core</groupId>
 73                 <artifactId>jackson-databind</artifactId>
 74                 <version>${jackson.version}</version>
 75             </dependency>
 76             <!-- httpclient -->
 77             <dependency>
 78                 <groupId>org.apache.httpcomponents</groupId>
 79                 <artifactId>httpclient</artifactId>
 80                 <version>${httpclient.version}</version>
 81             </dependency>
 82             <!-- quartz任务调度框架 -->
 83             <dependency>
 84                 <groupId>org.quartz-scheduler</groupId>
 85                 <artifactId>quartz</artifactId>
 86                 <version>${quartz.version}</version>
 87             </dependency>
 88             <!-- 单元测试 -->
 89             <dependency>
 90                 <groupId>junit</groupId>
 91                 <artifactId>junit</artifactId>
 92                 <version>${junit.version}</version>
 93                 <scope>test</scope>
 94             </dependency>
 95             <!-- 日志处理 -->
 96             <dependency>
 97                 <groupId>org.slf4j</groupId>
 98                 <artifactId>slf4j-log4j12</artifactId>
 99                 <version>${slf4j.version}</version>
100             </dependency>
101             <!-- Mybatis -->
102             <dependency>
103                 <groupId>org.mybatis</groupId>
104                 <artifactId>mybatis</artifactId>
105                 <version>${mybatis.version}</version>
106             </dependency>
107             <dependency>
108                 <groupId>org.mybatis</groupId>
109                 <artifactId>mybatis-spring</artifactId>
110                 <version>${mybatis.spring.version}</version>
111             </dependency>
112             <dependency>
113                 <groupId>com.github.miemiedev</groupId>
114                 <artifactId>mybatis-paginator</artifactId>
115                 <version>${mybatis.paginator.version}</version>
116             </dependency>
117             <dependency>
118                 <groupId>com.github.pagehelper</groupId>
119                 <artifactId>pagehelper</artifactId>
120                 <version>${pagehelper.version}</version>
121             </dependency>
122             <!-- MySql -->
123             <dependency>
124                 <groupId>mysql</groupId>
125                 <artifactId>mysql-connector-java</artifactId>
126                 <version>${mysql.version}</version>
127             </dependency>
128             <!-- 连接池 -->
129             <dependency>
130                 <groupId>com.alibaba</groupId>
131                 <artifactId>druid</artifactId>
132                 <version>${druid.version}</version>
133             </dependency>
134             <!-- Spring -->
135             <dependency>
136                 <groupId>org.springframework</groupId>
137                 <artifactId>spring-context</artifactId>
138                 <version>${spring.version}</version>
139             </dependency>
140             <dependency>
141                 <groupId>org.springframework</groupId>
142                 <artifactId>spring-beans</artifactId>
143                 <version>${spring.version}</version>
144             </dependency>
145             <dependency>
146                 <groupId>org.springframework</groupId>
147                 <artifactId>spring-webmvc</artifactId>
148                 <version>${spring.version}</version>
149             </dependency>
150             <dependency>
151                 <groupId>org.springframework</groupId>
152                 <artifactId>spring-jdbc</artifactId>
153                 <version>${spring.version}</version>
154             </dependency>
155             <dependency>
156                 <groupId>org.springframework</groupId>
157                 <artifactId>spring-aspects</artifactId>
158                 <version>${spring.version}</version>
159             </dependency>
160             <dependency>
161                 <groupId>org.springframework</groupId>
162                 <artifactId>spring-jms</artifactId>
163                 <version>${spring.version}</version>
164             </dependency>
165             <dependency>
166                 <groupId>org.springframework</groupId>
167                 <artifactId>spring-context-support</artifactId>
168                 <version>${spring.version}</version>
169             </dependency>
170             <!-- JSP相关 -->
171             <dependency>
172                 <groupId>jstl</groupId>
173                 <artifactId>jstl</artifactId>
174                 <version>${jstl.version}</version>
175             </dependency>
176             <dependency>
177                 <groupId>javax.servlet</groupId>
178                 <artifactId>servlet-api</artifactId>
179                 <version>${servlet-api.version}</version>
180                 <scope>provided</scope>
181             </dependency>
182             <dependency>
183                 <groupId>javax.servlet</groupId>
184                 <artifactId>jsp-api</artifactId>
185                 <version>${jsp-api.version}</version>
186                 <scope>provided</scope>
187             </dependency>
188             <!-- 文件上传组件 -->
189             <dependency>
190                 <groupId>commons-fileupload</groupId>
191                 <artifactId>commons-fileupload</artifactId>
192                 <version>${commons-fileupload.version}</version>
193             </dependency>
194             <!-- Redis客户端 -->
195             <dependency>
196                 <groupId>redis.clients</groupId>
197                 <artifactId>jedis</artifactId>
198                 <version>${jedis.version}</version>
199             </dependency>
200             <!-- solr客户端 -->
201             <dependency>
202                 <groupId>org.apache.solr</groupId>
203                 <artifactId>solr-solrj</artifactId>
204                 <version>${solrj.version}</version>
205             </dependency>
206             <!-- dubbo相关 -->
207             <dependency>
208                 <groupId>com.alibaba</groupId>
209                 <artifactId>dubbo</artifactId>
210                 <version>${dubbo.version}</version>
211             </dependency>
212             <dependency>
213                 <groupId>org.apache.zookeeper</groupId>
214                 <artifactId>zookeeper</artifactId>
215                 <version>${zookeeper.version}</version>
216             </dependency>
217             <dependency>
218                 <groupId>com.github.sgroschupf</groupId>
219                 <artifactId>zkclient</artifactId>
220                 <version>${zkclient.version}</version>
221             </dependency>
222             <dependency>
223                 <groupId>org.apache.activemq</groupId>
224                 <artifactId>activemq-all</artifactId>
225                 <version>${activemq.version}</version>
226             </dependency>
227             <dependency>
228                 <groupId>org.freemarker</groupId>
229                 <artifactId>freemarker</artifactId>
230                 <version>${freemarker.version}</version>
231             </dependency>
232 
233         </dependencies>
234     </dependencyManagement>
235 
236     <build>
237         <finalName>${project.artifactId}</finalName>
238         <plugins>
239             <!-- 资源文件拷贝插件 -->
240             <plugin>
241                 <groupId>org.apache.maven.plugins</groupId>
242                 <artifactId>maven-resources-plugin</artifactId>
243                 <version>2.7</version>
244                 <configuration>
245                     <encoding>UTF-8</encoding>
246                 </configuration>
247             </plugin>
248             <!-- java编译插件 -->
249             <plugin>
250                 <groupId>org.apache.maven.plugins</groupId>
251                 <artifactId>maven-compiler-plugin</artifactId>
252                 <version>3.2</version>
253                 <configuration>
254                     <source>1.7</source>
255                     <target>1.7</target>
256                     <encoding>UTF-8</encoding>
257                 </configuration>
258             </plugin>
259         </plugins>
260         <pluginManagement>
261             <plugins>
262                 <!-- 配置Tomcat插件 -->
263                 <plugin>
264                     <groupId>org.apache.tomcat.maven</groupId>
265                     <artifactId>tomcat7-maven-plugin</artifactId>
266                     <version>2.2</version>
267                 </plugin>
268             </plugins>
269         </pluginManagement>
270     </build>
271 </project>
272 
273 
274         <!--
275             <scope>provided</scope>
276             编译测试都用它，运行是不用（tomcat会提供，可能引起冲突）
277 
278             设置资源路径
279         -->
父工程的pom.xml

2）pojo层（什么都不引入）

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0"
 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5     <parent>
 6         <artifactId>e3-manager</artifactId>
 7         <groupId>cn.e3mall</groupId>
 8         <version>0.0.1-SNAPSHOT</version>
 9     </parent>
10     <modelVersion>4.0.0</modelVersion>
11 
12     <artifactId>e3-manager-pojo</artifactId>
13 
14 
15 
16 </project>
View Code

3）dao层（引入Mybatis，MySQL，连接池，pojo层）

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0"
 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5     <parent>
 6         <artifactId>e3-manager</artifactId>
 7         <groupId>cn.e3mall</groupId>
 8         <version>0.0.1-SNAPSHOT</version>
 9     </parent>
10     <modelVersion>4.0.0</modelVersion>
11 
12     <artifactId>e3-manager-dao</artifactId>
13     <dependencies>
14         <dependency>
15             <groupId>cn.e3mall</groupId>
16             <artifactId>e3-manager-pojo</artifactId>
17             <version>0.0.1-SNAPSHOT</version>
18         </dependency>
19 
20         <!-- Mybatis -->
21         <dependency>
22             <groupId>org.mybatis</groupId>
23             <artifactId>mybatis</artifactId>
24         </dependency>
25         <dependency>
26             <groupId>org.mybatis</groupId>
27             <artifactId>mybatis-spring</artifactId>
28         </dependency>
29         <dependency>
30             <groupId>com.github.miemiedev</groupId>
31             <artifactId>mybatis-paginator</artifactId>
32         </dependency>
33         <dependency>
34             <groupId>com.github.pagehelper</groupId>
35             <artifactId>pagehelper</artifactId>
36         </dependency>
37         <!-- MySql -->
38         <dependency>
39             <groupId>mysql</groupId>
40             <artifactId>mysql-connector-java</artifactId>
41         </dependency>
42         <!-- 连接池 -->
43         <dependency>
44             <groupId>com.alibaba</groupId>
45             <artifactId>druid</artifactId>
46         </dependency>
47     </dependencies>
48 
49 </project>
View Code

4）interface层（引入pojo层）

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0"
 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5     <parent>
 6         <artifactId>e3-manager</artifactId>
 7         <groupId>cn.e3mall</groupId>
 8         <version>0.0.1-SNAPSHOT</version>
 9     </parent>
10     <modelVersion>4.0.0</modelVersion>
11 
12     <artifactId>e3-manager-interface</artifactId>
13     <dependencies>
14         <dependency>
15             <groupId>cn.e3mall</groupId>
16             <artifactId>e3-manager-pojo</artifactId>
17             <version>0.0.1-SNAPSHOT</version>
18         </dependency>
19     </dependencies>
20 
21 
22 </project>
View Code

5）Service层（引入interface层，dao层，Spring）

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0"
 3          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 5     <parent>
 6         <artifactId>e3-manager</artifactId>
 7         <groupId>cn.e3mall</groupId>
 8         <version>0.0.1-SNAPSHOT</version>
 9     </parent>
10     <modelVersion>4.0.0</modelVersion>
11 
12     <artifactId>e3-manager-service</artifactId>
13     <dependencies>
14         <dependency>
15             <groupId>cn.e3mall</groupId>
16             <artifactId>e3-manager-dao</artifactId>
17             <version>0.0.1-SNAPSHOT</version>
18         </dependency>
19         <dependency>
20             <groupId>cn.e3mall</groupId>
21             <artifactId>e3-manager-interface</artifactId>
22             <version>0.0.1-SNAPSHOT</version>
23         </dependency>
24         <!-- Spring -->
25         <dependency>
26             <groupId>org.springframework</groupId>
27             <artifactId>spring-context</artifactId>
28         </dependency>
29         <dependency>
30             <groupId>org.springframework</groupId>
31             <artifactId>spring-beans</artifactId>
32         </dependency>
33         <dependency>
34             <groupId>org.springframework</groupId>
35             <artifactId>spring-webmvc</artifactId>
36         </dependency>
37         <dependency>
38             <groupId>org.springframework</groupId>
39             <artifactId>spring-jdbc</artifactId>
40         </dependency>
41         <dependency>
42             <groupId>org.springframework</groupId>
43             <artifactId>spring-aspects</artifactId>
44         </dependency>
45         <dependency>
46             <groupId>org.springframework</groupId>
47             <artifactId>spring-jms</artifactId>
48         </dependency>
49         <dependency>
50             <groupId>org.springframework</groupId>
51             <artifactId>spring-context-support</artifactId>
52         </dependency>
53     </dependencies>
54 
55 
56 </project>
View Code

6）引入JSP相关

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3          xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 4     <parent>
 5         <artifactId>e3-manager</artifactId>
 6         <groupId>cn.e3mall</groupId>
 7         <version>0.0.1-SNAPSHOT</version>
 8     </parent>
 9 
10     <modelVersion>4.0.0</modelVersion>
11     <packaging>war</packaging>
12 
13     <name>e3-manager-web</name>
14     <artifactId>e3-manager-web</artifactId>
15 
16     <dependencies>
17         <dependency>
18             <groupId>cn.e3mall</groupId>
19             <artifactId>e3-manager-service</artifactId>
20             <version>0.0.1-SNAPSHOT</version>
21         </dependency>
22 
23         <!-- JSP相关 -->
24         <dependency>
25             <groupId>jstl</groupId>
26             <artifactId>jstl</artifactId>
27         </dependency>
28         <dependency>
29             <groupId>javax.servlet</groupId>
30             <artifactId>servlet-api</artifactId>
31             <scope>provided</scope>
32         </dependency>
33         <dependency>
34             <groupId>javax.servlet</groupId>
35             <artifactId>jsp-api</artifactId>
36             <scope>provided</scope>
37         </dependency>
38     </dependencies>
39 
40 </project>
View Code

二、SSM项目搭建

1）Springmvc

<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!--*****************配置各种 注解******************-->

    <context:component-scan base-package="cn.e3mall.controller" />　　<!--*******-->
    <!-- 配置注解驱动（由于默认的已经过时），用于扫描RequestMapping等注解 -->
    <mvc:annotation-driven />

    <!--
    视图解释器
        modelAndView.setViewName("/WEB-INF/jsp/itemList.jsp");  ==>  modelAndView.setViewName("itemList");
    -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>



</beans>

2）applicationContext-dao.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:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">



    <!-- ****************整合Mybatis**************** -->

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

    <!-- 设置数据库连接池 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
          destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClass}" />
        <property name="url" value="${jdbc.jdbcUrl}" />
        <property name="username" value="${jdbc.user}" />
        <property name="password" value="${jdbc.password}" />
        <property name="maxActive" value="10" />
        <property name="maxIdle" value="5" />
    </bean>

    <!-- 建立Mybatis的SQLSessionFactory工厂 -->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入连接池 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 核心配置文件的位置 -->
        <property name="configLocation" value="classpath:sqlMapConfig.xml"/>
    </bean>

    <!-- Mapper动态代理开发   扫描 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 基本包，会自动扫描子包 -->
        <property name="basePackage" value="cn.e3mall.mapper"/>
    </bean>



</beans>

3）applicationContext-service.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:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">


    <!-- 扫描@Controler，@Service...   -->
    <context:component-scan base-package="cn.e3mall.service"/>



</beans>

4）applicationContext-transaction.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:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">



    <!--******************配置 注解 事务********************-->

    <!-- 配置事务核心管理器,封装了所有事务操作. 依赖于连接池 -->
    <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" >
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!-- 开启使用注解管理aop事务 -->
    <tx:annotation-driven/>

</beans>

5）web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

    <!-- 处理POST提交乱码问题 -->
    <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>/*</url-pattern>
    </filter-mapping>

    <!-- 配置寻找的配置文件+监听器 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/applicationContext-*.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- Spring MVC的前端控制器 -->
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/springmvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <!--
        1. /*  拦截所有   jsp  js png .css  真的全拦截   建议不使用
        2. *.action *.do 拦截以do action 结尾的请求     肯定能使用   ERP
        3. /  拦截所有 （不包括jsp) (包含.js .png.css)  强烈建议使用     前台 面向消费者  www.jd.com/search   /对静态资源放行
         -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

6）sqlMapConfig.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>
    <!-- 设置别名 -->
    <typeAliases>
        <!-- 指定扫描包，会把包内所有的类都设置别名，别名的名称就是类名，大小写不敏感 -->
        <package name="cn.x5456.domain" />
    </typeAliases>

    <!--<mappers>-->
        <!--<package name="cn.x5456.dao"/>　　<!–配置扫描mapper接口（一定要配）–>-->
    <!--</mappers>-->

</configuration>

三、小Demo

由于使用的是逆向工程的方法，dao，pojo不用我们整

1）Service层（逆向工程条件查询）

@Service
@Transactional
public class ItemServiceImpl implements ItemService {

    @Autowired
    private TbItemMapper itemMapper;

    @Override
    public TbItem getItemById(Long id) {
        // 逆向工程两种通过主键查询的方法
        // 方法一：
        // itemMapper.selectByPrimaryKey(id);
        // 方法二：
        TbItemExample example = new TbItemExample();
        // 1.设置查询条件
        Criteria criteria = example.createCriteria();
        criteria.andIdEqualTo(id);
        // 2.执行查询
        List<TbItem> itemList = itemMapper.selectByExample(example);
        // 3.返回
        if (itemList!=null&&itemList.size()>0){
            return itemList.get(0);
        }

        return null;
    }
}

2）Controller层（引入路径接收参数的方法）

@Controller
public class ItemController {

    @Autowired
    private ItemService itemService;

    // 又一种接收参数的方法，路径接受
    @RequestMapping("/item/{itemId}")
    @ResponseBody    // 返回一个json
    private TbItem getItemById(@PathVariable Long itemId){

        return itemService.getItemById(itemId);

    }

}

原因

此异常的原因是由于mapper接口编译后在同一个目录下没有找到mapper映射文件而出现的。由于maven工程在默认情况下src/main/java目录下的mapper文件是不发布到target目录下的。

解决方法1

在e3-manager-dao工程的pom文件中添加如下内容：（原理：将配置文件路径，改到java目录下）

<!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 -->
	<build>
		<resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>
	</build>

解决方法2：

将映射文件放到resources目录下

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原文地址：https://www.cnblogs.com/x54256/p/8619877.html