總體知識框架
maven高級應用:
1,maven基礎回顧。
2,maven傳統的web工程做一個數據查詢操作。
3,maven工程拆分與聚合的思想。
4,把第二階段做好的web工程修改成maven拆分與聚合的形式。
5,私服【遠程倉庫】。
6,如何安裝第三方jar包。【把第三方jar包安裝到本地倉庫,把第三方jar包安裝到私服。】
maven基礎知識回顧:
maven是一個項目管理工具。
依賴管理:maven對項目中jar包的管理過程。傳統工程我們直接把jar包放置在項目中。
maven工程真正的jar包放置在倉庫中,項目中只用放置jar包的座標。
倉庫的種類:本地倉庫,遠程倉庫【私服】,中央倉庫。
倉庫之間的關係:當我們啓動一個maven工程的時候,maven工程會通過pom文件中jar包的座標去本地倉庫找對應jar包。
默認情況下,如果本地倉庫沒有對應jar包,maven工程會自動去中央倉庫下載jar包到本地倉庫。
在公司中,如果本地沒有對應jar包,會先從私服下載jar包,
如果私服沒有jar包,可以從中央倉庫下載,也可以從本地上傳。
一鍵構建:maven自身集成了tomcat插件,可以對項目進行編譯,測試,打包,安裝,發佈等操作。
maven常用命令:clean,compile,test,package,install,deploy。
maven三套生命週期:清理生命週期,默認生命週期,站點生命週期。
創建一個 maven 工程
知識點
依賴傳遞
定義:包依賴的包也會出現在了我們的 maven 工程中,這些包就是傳遞依賴。
解決:爲了解決依導入包和依賴包的衝突,maven 自動按照下邊的原則調解:
- 第一聲明者優先原則
誰先聲明就用誰! - 路徑近者優先原則
誰少調用或直接用就用誰!
排除依賴:標籤可以排除依賴的標籤.
鎖定版本:用在標籤裏面寫鎖定標籤,還可以把版本號提取出來,使用標籤設置成變量。
——注意:在工程中鎖定依賴的版本並不代表在工程中添加了依賴,如果工程需要添加鎖定版本的依賴則需要單獨添加標籤。
pom.xml的定義
1)鎖定依賴版本
2)添加依賴
(SSM常用jar座標)
<?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.itcast.ssm_maven</groupId>
<artifactId>ssm_maven</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<spring.version>5.0.2.RELEASE</spring.version>
<springmvc.version>5.0.2.RELEASE</springmvc.version>
<mybatis.version>3.4.5</mybatis.version>
</properties>
<!--鎖定依賴版本-->
<dependencyManagement>
<dependencies>
<!-- Mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!-- springMVC -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${springmvc.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- spring --> <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</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-expression</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-aspects</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-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<!--添加依賴-->
<dependencies>
<!-- Mybatis 和 mybatis 與 spring 的整合 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<!-- MySql 驅動 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.32</version>
</dependency>
<!-- druid 數據庫連接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.9</version>
</dependency>
<!-- springMVC 核心-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
</dependency>
<!-- spring 相關 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</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-context-support</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
</dependency>
<!-- junit 測試 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<!-- jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<!-- 設置編譯版本爲 1.8 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version >
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>/</path>
<port>8080</port>
</configuration>
</plugin>
</plugins>
</build>
</project>
dao層
- pojo
- dao 層代碼
- 配置文件
xxxdao.xml
————sql語句
applicationContext.xml,如下:
《Spring配置文件頭部聲明》
<?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">
<!--dao層配置文件開始-->
<!--配置連接池-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql:///maven"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</bean>
<!--配置生產SqlSession對象的工廠-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!--掃描pojo包,給包下所有pojo對象起別名-->
<property name="typeAliasesPackage" value="com.itheima.domain"/>
</bean>
<!--掃描接口包路徑,生成包下所有接口的代理對象,並且放入spring容器中-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.itheima.dao"/>
</bean>
<!--dao層配置文件結束-->
</beans>
log4j.properties
# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE debug info warn error fatal
log4j.rootCategory=debug, CONSOLE, LOGFILE
# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE
# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n
# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=E://logs/error.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n
- 單元測試——ItemsTest
package com.itheima.test;
import com.itheima.domain.Items;
import com.itheima.service.ItemsService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class ItemsTest {
@Test
public void findById(){
//獲取spring容器
ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
//dao測試
//從容器中拿到所需的dao的代理對象
ItemsDao itemsDao = ac.getBean(ItemsDao.class);
//調用方法
Items items = itemsDao.findById(1);
System.out.println(items.getName());
}
}
Service層
- ItemsService.java(interface)
public Items findById(Integer id);
- ItemsServiceImpl.java
@Service
public class ItemsServiceImpl implements ItemsService {
@Autowired
private ItemsDao itemsDao;
public Items findById(Integer id) {
return itemsDao.findById(id);
}
}
- applicationContext.xml
<!--service層配置文件開始-->
<!--組件掃描配置-->
<context:component-scan base-package="com.itheima.service"/>
<!--aop面向切面編程,切面就是切入點和通知的組合-->
<!--配置事務管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--配置事務的通知-->
<tx:advice id="advice">
<tx:attributes>
<!--先掃部分掃描-->
<tx:method name="save*" propagation="REQUIRED"/>
<tx:method name="update*" propagation="REQUIRED"/>
<tx:method name="delete*" propagation="REQUIRED"/>
<tx:method name="find*" read-only="true"/>
<!--再掃全局掃描-->
<tx:method name="*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<!--配置切面-->
<aop:config>
<aop:pointcut id="pointcut" expression="execution(* com.itheima.service.impl.*.*(..))"/>
<aop:advisor advice-ref="advice" pointcut-ref="pointcut"/>
</aop:config>
<!--service層配置文件結束-->
- ItemsTest
//service測試
ItemsService itemsService = ac.getBean(ItemsService.class);
//調用方法
Items items = itemsService.findById(1);
System.out.println(items.getName());
Web層
- ItemsController(interface)
@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";
}
}
- springmvc.xml
《springmvc.xml配置文件頭部聲明》
<?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">
<!--組件掃描-->
<context:component-scan base-package="com.itheima.controller"/>
<!--處理器映射器,處理器適配器-->
<mvc:annotation-driven/>
<!--視圖解析器-->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!--釋放靜態資源-->
<mvc:default-servlet-handler/>
</beans>
- itemDetail.jsp
<form>
<table width="100%" border=1>
<tr>
<td>商品名稱</td>
<td> ${item.name } </td>
</tr>
<tr>
<td>商品價格</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>商品簡介</td>
<td>${item.detail} </td>
</tr>
</table>
</form>
- web.xml
<!--編碼過濾器-->
<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>
<!--配置spring核心監聽器-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!--重新指定spring配置文件的路徑-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!--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>
<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>
————> 運行與調試(maven自帶的tomcat7插件)