基于maven的SSM项目环境搭建
- maven构建SSM工程
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要求
实现 SSM 工程构建,规范依赖管理。场景:根据 id 展示商品信息。 -
数据库
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IDEA下创建maven工程
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创建maven工程,勾选maven的webapp框架,如图:
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在pom.xml中导入jar坐标
<?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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>cn.mumu</groupId> <artifactId>maven_01</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <!--maven工程要导入jar包的坐标,就必须要考虑解决jar包冲突。 解决jar包冲突的方式一: 第一声明优先原则:哪个jar包的坐标在靠上的位置,这个jar包就是先声明的。 先声明的jar包坐标下的依赖包,可以优先进入项目中。 maven导入jar包中的一些概念: 直接依赖:项目中直接导入的jar包,就是该项目的直接依赖包。 传递依赖:项目中没有直接导入的jar包,可以通过项目直接依赖jar包传递到项目中去。 解决jar包冲突的方式二: 路径近者优先原则。直接依赖路径比传递依赖路径近,那么最终项目进入的jar包会是路径近的直接依赖包。 解决jar包冲突的方式三【推荐使用】: 直接排除法。 当我们要排除某个jar包下依赖包,在配置exclusions标签的时候,内部可以不写版本号。 因为此时依赖包使用的版本和默认和本jar包一样。 --> <!-- 统一管理jar包版本 --> <properties> <spring.version>5.0.2.RELEASE</spring.version> <slf4j.version>1.6.6</slf4j.version> <log4j.version>1.2.12</log4j.version> <shiro.version>1.2.3</shiro.version> <mysql.version>5.1.6</mysql.version> <mybatis.version>3.4.5</mybatis.version> <spring.security.version>5.0.1.RELEASE</spring.security.version> </properties> <!-- maven工程是可以分父子依赖关系的。 凡是依赖别的项目后,拿到的别的项目的依赖包,都属于传递依赖。 比如:当前A项目,被B项目依赖。那么我们A项目中所有jar包都会传递到B项目中。 B项目开发者,如果再在B项目中导入一套ssm框架的jar包,对于B项目是直接依赖。 那么直接依赖的jar包就会把我们A项目传递过去的jar包覆盖掉。 为了防止以上情况的出现。我们可以把A项目中主要jar包的坐标锁住,那么其他依赖该项目的项目中, 即便是有同名jar包直接依赖,也无法覆盖。 --> <!-- 锁定jar包版本 --> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> </dependencies> </dependencyManagement> <!-- 项目依赖jar包 --> <dependencies> <!-- spring --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.6.8</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- log start --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> </dependency> <!-- log end --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.0</version> </dependency> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.2</version> <type>jar</type> <scope>compile</scope> </dependency> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>5.1.2</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-web</artifactId> <version>${spring.security.version}</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-config</artifactId> <version>${spring.security.version}</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-core</artifactId> <version>${spring.security.version}</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-taglibs</artifactId> <version>${spring.security.version}</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.0.9</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> </dependencies> <!-- 添加tomcat7插件 --> <build> <plugins> <plugin> <groupId>org.apache.tomcat.maven</groupId> <artifactId>tomcat7-maven-plugin</artifactId> <version>2.2</version> </plugin> </plugins> </build> </project>
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配置web.xml文件头声明
<!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 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_3_0.xsd" version="3.0"> <!--文件头结束--> </web-app>
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补充项目目录
- 设置java为Sources Root
- 设置resources为Resources Root
- 将test目录下的java设置为Test Resources Root
- 创建如下的文件目录:
- 设置java为Sources Root
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创建domain层,Items.java
package cn.mumu.domain; import java.util.Date; public class Items { private Integer id; private String name; private Double price; private String pic; private Date createtime; private String detail; public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Double getPrice() { return price; } public void setPrice(Double price) { this.price = price; } public String getPic() { return pic; } public void setPic(String pic) { this.pic = pic; } public Date getCreatetime() { return createtime; } public void setCreatetime(Date createtime) { this.createtime = createtime; } public String getDetail() { return detail; } public void setDetail(String detail) { this.detail = detail; } }
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创建dao层,ItemsDao.java
package cn.mumu.dao; import cn.mumu.domain.Items; public interface ItemsDao { public Items findById(Integer id); }
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创建mapper配置文件,ItemsDao.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"> <!--命名空间--> <mapper namespace="cn.mumu.dao.ItemsDao"> <select id="findById" parameterType="int" resultType="items"><!--待会再applicationContext.xml文件中记得配置别名--> select * from items where id = #{id} </select> </mapper>
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创建Spring配置文件,applicationContext.xml。dao层的配置:
<?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" 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/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--1.文件头结束--> <!--dao层配置文件开始--> <!--2.配置连接池--> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <!--数据库驱动--> <property name="driverClassName" value="com.mysql.jdbc.Driver"/> <!--数据库地址--> <property name="url" value="jdbc:mysql:///maven"/> <!--数据库用户名--> <property name="username" value="root"/> <!--数据库密码--> <property name="password" value="123456"/> </bean> <!--3.配置生产SqlSession对象的工厂--> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!--需要数据库连接--> <property name="dataSource" ref="dataSource"/> <!--扫描pojo包,给包下所有pojo对象起_*别名*_--> <property name="typeAliasesPackage" value="cn.mumu.domain"/> </bean> <!--4.扫描接口包路径,生成包下所有接口的代理对象,并且放入spring容器中--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="cn.mumu.dao"/> </bean> <!--dao层配置文件结束-->
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测试一下,创建test\java\cn\mumu\test\ItemsTest.java:
package cn.mumu.test; import cn.mumu.dao.ItemsDao; import cn.mumu.domain.Items; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class ItemsTest { @Test public void findById(){ //获取spring容器 ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml"); //dao测试 //从容器中拿到所需的dao的代理对象 ItemsDao itemsDao = ac.getBean(ItemsDao.class); //调用方法 Items items = itemsDao.findById(1); System.out.println(items.getName()); } }
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测试结果:
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创建service层
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创建service层接口,ItemsService.java
package cn.mumu.service; import cn.mumu.domain.Items; public interface ItemsService { public Items findById(Integer id); }
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创建实现类实现ItemsService接口,ItemsServiceImpl.java
package cn.mumu.service.impl; import cn.mumu.dao.ItemsDao; import cn.mumu.domain.Items; import cn.mumu.service.ItemsService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; @Service public class ItemsServiceImpl implements ItemsService { @Autowired //自动注入 private ItemsDao itemsDao; public Items findById(Integer id) { return itemsDao.findById(id); } }
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添加service层配置文件,applicationContext.xml。service(业务)层的配置:
<!--service层配置文件开始--> <!--组件扫描配置,启动@service注解的作用--> <context:component-scan base-package="cn.mumu.service"/> <!--aop面向切面编程,切面就是切入点和通知的组合--> <!--配置事务管理器--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"/> </bean> <!--配置事务的通知--> <tx:advice id="advice"> <tx:attributes> <tx:method name="save*" propagation="REQUIRED"/><!--保存事务--> <tx:method name="update*" propagation="REQUIRED"/><!--更新事务--> <tx:method name="delete*" propagation="REQUIRED"/><!--删除事务--> <tx:method name="find*" read-only="true"/><!--查找事务--> <tx:method name="*" propagation="REQUIRED"/> </tx:attributes> </tx:advice> <!--配置切面--> <aop:config> <aop:pointcut id="pointcut" expression="execution(* cn.mumu.service.impl.*.*(..))"/> <!--将“通知”和“切面”整合在一起--> <aop:advisor advice-ref="advice" pointcut-ref="pointcut"/> </aop:config> <!--service层配置文件结束-->
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测试
package cn.mumu.test; import cn.mumu.domain.Items; import cn.mumu.service.ItemsService; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; public class ItemsTest { @Test public void findById(){ //获取spring容器 ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml"); //service测试 ItemsService itemsService = ac.getBean(ItemsService.class); //调用方法 Items items = itemsService.findById(1); System.out.println(items.getName()); } }
测试结果:
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创建web层
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创建controller包下的ItemsController.java
package cn.mumu.controller; import cn.mumu.domain.Items; import cn.mumu.service.ItemsService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; @Controller @RequestMapping("/items") public class ItemsController { @Autowired private ItemsService itemsService; @RequestMapping("/findDetail") public String findDetail(Model model){ Items items = itemsService.findById(1); model.addAttribute("item", items); return "itemDetail"; } }
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创建前端配置文件springmvc.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" 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/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--1.文件头结束--> <!--2.组件扫描,启动@controller注解的作用--> <context:component-scan base-package="cn.mumu.controller"/> <!--3.1处理器映射器,3.2处理器适配器--> <mvc:annotation-driven/> <!--4.视图解析器--> <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/pages/"/><!--前缀--> <property name="suffix" value=".jsp"/><!--后缀--> </bean> <!--5.释放静态资源--> <mvc:default-servlet-handler/> </beans>
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创建/WEB-INF/pages/itemDetail.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> </head> <body> <form> <table width="100%" border=1> <tr> <td>商品名称</td> <td> ${item.name } </td> </tr> <tr> <td>商品价格</td> <td> ${item.price } </td> </tr> <tr> <td>生成日期</td> <td> <fmt:formatDate value="${item.createtime}" pattern="yyyy-MM-dd HH:mm:ss"/> </td> </tr> <tr> <td>商品简介</td> <td>${item.detail} </td> </tr> </table> </form> </body> </html>
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在web.xml下配置
<!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 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_3_0.xsd" version="3.0"> <!--文件头结束--> <!--1.编码过滤器--> <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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!--2.1配置spring核心监听器--> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!--2.2重新指定spring配置文件的路径--> <context-param> <param-name>contextConfigLocation</param-name> <!--applicationContext.xml文件路径--> <param-value>classpath:applicationContext.xml</param-value> </context-param> <!--3.springmvc的核心servlet--> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <!--springmvc.xml文件路径--> <param-value>classpath:springmvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
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测试
- 启动maven的tomcat
- 如图所示启动成功,在浏览器访问项目地址:http://localhost:8080/maven_ssm
- 访问方法:http://localhost:8080/maven_ssm/items/findDetail,得到数据库数据表示访问成功。
- 启动maven的tomcat
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