maven创建多模块化项目（二）

1.项目脚手架参考https://www.cnblogs.com/fishyy/p/10313566.html

2.在父pom.xml中添加springmvc相关dependency

<?xml version="1.0" encoding="UTF-8"?>
<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  
  <groupId>com.yyu.cms</groupId>
  <artifactId>appcms</artifactId>
  <packaging>pom</packaging>
  <version>1.0-SNAPSHOT</version>

  <name>appcms</name>
  <url>http://maven.apache.org</url>

  <dependencyManagement>
    <dependencies>
      <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>${junit.version}</version>
        <scope>test</scope>
      </dependency>
      <!-- spring mvc -->
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>4.2.6.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>4.2.6.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>4.2.6.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>4.2.6.RELEASE</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>4.2.6.RELEASE</version>
      </dependency>
    </dependencies>
  </dependencyManagement>

  <modules>
    <module>appcms-common</module>
    <module>appcms-domain</module>
    <module>appcms-dao</module>
    <module>appcms-service</module>
    <module>appcms-web</module>
  </modules>

  <properties>
    <app.version>${project.version}</app.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <java.version>1.8</java.version>
    <junit.version>3.8.1</junit.version>
  </properties>

</project>

在appcms-web中引用springmvc相关dependency

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>com.yyu.cms</groupId>
    <artifactId>appcms</artifactId>
    <version>1.0-SNAPSHOT</version>
  </parent>

  <groupId>com.yyu.cms.web</groupId>
  <artifactId>appcms-web</artifactId>
  <packaging>war</packaging>
  <name>appcms-web Maven Webapp</name>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>com.yyu.cms.service</groupId>
      <artifactId>appcms-service</artifactId>
      <version>${app.version}</version>
    </dependency>
    <!-- spring mvc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
    </dependency>
  </dependencies>

  <build>
    <finalName>appcms-web</finalName>
  </build>
</project>

3.在appcms-web中新建java包

并创建如下controller

4.创建my-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:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd">

    <context:component-scan base-package="com.yyu.cms.web.controller"/>

</beans>

5.修改web.xml，配置DispatcherServlet

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>SpringMvcApp</display-name>

  <servlet>
      <servlet-name>myDispatcherServlet</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
      <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:my-dispatcher-servlet.xml</param-value>
      </init-param>
      <load-on-startup>1</load-on-startup>
  </servlet>
    <servlet-mapping>
        <servlet-name>myDispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

6.打包发布

拷贝appcms-web.war包到tomcat webapp目录修改其名称为yyucms.war

7.运行tomcat，访问yyucms

 

8.配置ContextLoaderListener，ContextLoaderListener是一个ServletContextListener，它通过contextConfigLocation参数所指定的spring配置文件启动业务层的Spring容器。

在web.xml文件中配置ContextLoaderListener，可能我的maven版本过低，生成的web.xml文件添加ContextLoaderListener配置会报错

修改其为如下

修改后的web.xml，加入ContextLoaderListener配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         id="WebApp_ID" version="3.0">
    <display-name>SpringMvcApp</display-name>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <servlet>
        <servlet-name>myDispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:my-dispatcher-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>myDispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

9.在加入applicationContext前，先添加相关dependency

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>com.yyu.cms</groupId>
    <artifactId>appcms</artifactId>
    <version>1.0-SNAPSHOT</version>
  </parent>

  <groupId>com.yyu.cms.dao</groupId>
  <artifactId>appcms-dao</artifactId>
  <packaging>jar</packaging>
  <name>appcms-dao</name>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>com.yyu.cms.common</groupId>
      <artifactId>appcms-common</artifactId>
      <version>${app.version}</version>
    </dependency>
    <dependency>
      <groupId>com.yyu.cms.domain</groupId>
      <artifactId>appcms-domain</artifactId>
      <version>${app.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>3.0.5.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.38</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.2</version>
    </dependency>
  </dependencies>
</project>

10.添加applicationContext.xml文件

<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/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">

    <!-- 配置组件扫描器 -->
    <!-- 在my-dispatcher-servlet.xml文件中也可以配置这个属性 -->
    <context:component-scan base-package="com.yyu.cms"/>

    <!-- 数据源 -->
    <bean id="dataSource"
          class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/test" />
        <property name="username" value="root" />
        <property name="password" value="yyu010383" />
    </bean>

    <!-- 配置session工厂 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>

    <!-- 事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 配置AOP通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <!-- 配置事务属性 -->
        <tx:attributes>
            <!-- 添加事务管理的方法 -->
            <tx:method name="save*" propagation="REQUIRED"/>
            <tx:method name="delete*" propagation="REQUIRED"/>
            <tx:method name="update*" propagation="REQUIRED"/>
            <tx:method name="select*" read-only="true"/>
        </tx:attributes>
    </tx:advice>

    <!-- 配置AOP，为添加事务管理的操作配置AOP -->
    <aop:config>
        <!-- 引入的Spring定义的事务通知，需要使用aop:advisor -->
        <!-- 下面难 -->
        <aop:advisor advice-ref="txAdvice"
                     pointcut="execution(* com.yyu.cms.service.*.*(..))"
        />
    </aop:config>
</beans>

11.添加mybstis-config.xml文件

<?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>
    <!-- 设置驼峰匹配 -->
    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>
    <!-- 设置包扫描(别名) -->
    <typeAliases>
        <package name="com.yyu.cms.domain"/>
    </typeAliases>
    <!-- 配置环境：可以配置多个环境，default：配置某一个环境的唯一标识，表示默认使用哪个环境 -->
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <!-- 配置连接信息 -->
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/test"/>
                <property name="username" value="root"/>
                <property name="password" value="yyu010383"/>
            </dataSource>
        </environment>
    </environments>
    <!-- 配置映射文件：用来配置sql语句和结果集类型等 -->
    <mappers>
        <!--<mapper resource="UserMapper.xml"/>-->
    </mappers>
</configuration>

12.添加service类

TestService.java

package com.yyu.cms.service;


public interface TestService {
    int calc(int a, int b);
}

TestServiceImpl.java

package com.yyu.cms.service.impl;

import com.yyu.cms.service.TestService;
import org.springframework.stereotype.Service;

@Service
public class TestServiceImpl implements TestService{
    public int calc(int a, int b) {
        return a + b;
    }
}

要在appcms-service中使用@Service注解，需加入spring-context

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>com.yyu.cms</groupId>
    <artifactId>appcms</artifactId>
    <version>1.0-SNAPSHOT</version>
  </parent>

  <groupId>com.yyu.cms.service</groupId>
  <artifactId>appcms-service</artifactId>
  <packaging>jar</packaging>
  <name>appcms-service</name>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>com.yyu.cms.dao</groupId>
      <artifactId>appcms-dao</artifactId>
      <version>${app.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
    </dependency>
  </dependencies>
</project>

13.在controller中使用service

package com.yyu.cms.web.controller;

import com.yyu.cms.service.TestService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping(value = "/test")
public class TestController {
    @Autowired
    private TestService testService;

    @RequestMapping(value = "/hello/{name}", method = RequestMethod.GET)
    @ResponseBody
    public String welcome(@PathVariable String name) {
        return "hello " + name;
    }

    @RequestMapping(value = "/calc/{a}/{b}", method = RequestMethod.GET)
    @ResponseBody
    public String calc(@PathVariable int a, @PathVariable int b) {
        int result = testService.calc(a, b);
        return a + "加" + b + "的结果为" + result;
    }
}

14.这次不采取打包发布到tomcat中进行测试，直接使用IDEA运行测试

可以正常访问这两条路径

 

 

之前由于appcms-dao层的spring-jdbc的版本为5.1.3.RELEASE，spring的版本为4.2.6.RELEASE，spring-jdbc的版本过高，导致jar包兼容问题，访问http://localhost:8080/test/calc/1/1报错，出现以下错误，具体参考https://blog.csdn.net/z4331016/article/details/78257165

 

ps：辛亏现在有了springboot，否则真要被这些奇葩问题烦死>.<

降低spring-jdbc版本后，再次访问，响应如下图

这是中文乱码的问题，需要配置针对string类型的http消息转换的转换器

修改my-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:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">

    <!-- 扫描web层的bean -->
    <context:component-scan base-package="com.yyu.cms.web.controller"/>

    <mvc:annotation-driven>
        <mvc:message-converters register-defaults="true">
            <!-- 解决Controller返回中文字符串乱码问题 -->
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>text/html;charset=UTF-8</value>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

</beans>

访问OK