MyEclipse2018 利用maven搭建SSM專案(二)
接上文搭建SSM專案(一),已經搭建好了maven專案,沒有的同學請去
https://blog.csdn.net/heheyixiao233/article/details/82809623
配置檔案真的很讓人頭疼,所以我會直接貼出程式碼以供複製貼上,原則上沒有順序,但如果你是第一次配置,還是跟我一起配置吧
以下內容會有我個人理解,由於我也初學,以前都是用servlet-jdbc程式設計,所以我在理解的過程中會相互類比,如有錯誤,請指正
首先先設定pom檔案,引入必要的jar包,版本都比較新
<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>com.wanmait</groupId> <artifactId>testssm</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <properties> <webVersion>4.0</webVersion> <!-- spring版本號 --> <spring.version>5.0.8.RELEASE</spring.version> <!-- mybatis版本號 --> <mybatis.version>3.4.6</mybatis.version> <jackson.version>2.9.6</jackson.version> </properties> <dependencies> <!-- jstl junit servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> <scope>provided</scope> </dependency> <!-- junit單元測試包 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <!-- 表示開發的時候引入,釋出的時候不會載入此包 --> <scope>test</scope> </dependency> <!--引入json --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>${jackson.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>${jackson.version}</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>${jackson.version}</version> </dependency> <!-- 匯入dbcp的jar包,用來在applicationContext.xml中配置資料庫 --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.12</version> </dependency> <!-- log4j.... --> <!-- /log4j-api --> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-api</artifactId> <version>2.11.0</version> </dependency> <!--log4j-core --> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> <version>2.11.0</version> </dependency> <!-- log4j-web --> <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-web</artifactId> <version>2.11.0</version> </dependency> <!-- end..... --> <!-- spring核心包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-oxm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <!-- AOP相關包 --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>1.9.1</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.1</version> </dependency> <!-- mybatis核心包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <!-- mybatis/spring包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.2</version> </dependency> <!-- 引入Mybatis分頁外掛 --> <dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> <version>4.2.1</version> </dependency> <!-- 上傳元件包 --><!-- 不需要可以不用 --> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.3</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.6</version> </dependency> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.11</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.8</version> </dependency> </dependencies> <build/> </project>
配置好了ctrl+s儲存,會自動下載依賴的jar包
這部分注意兩點
1.首先由於我使用spring5.0.8(現在的最新版),所以沒有使用log4j,而使用lo4j2,反正我用log4j配置會過期,詳細資訊看
https://blog.csdn.net/hlx20080808/article/details/81062084
2.我的資料庫連線的jar包mysql-connector是8.0.12而不是5.*的版本,所以後面連線資料庫的寫法不一樣,要注意(很多人寫法對應不上版本,明明連線不上資料庫這不誤導新人嗎)
配置好了pom檔案我們再在src/main/java下建幾個包
- controller控制器包,相當於JDBC程式設計中的servlet包
- entity物件包,相當於vo包,也有地方叫pojo,如果是新手不建議一上來用MyBatis逆向工程生成,反正我生成失敗了
- mapper包,對映包,放Mybatis對映介面的,我寫MyBatis用註解(主要是看到的教程用註解,而寫我覺得註解是趨勢,xml有點麻煩)
- service包,放service介面
- service下的impl包,service的實體包,
個人理解:上面三個包才相當於以前的Dao,service和impl兩個包就相當於以前的單一例項,不會new新的物件,因為介面對應只有一個實體物件
說這些是為了大家能看懂註釋的地方,將相應的包改成自己專案的包
包,建好的目錄結構如下
注意:service包和service.impl合併了,但實際上是兩個包,建立物件的時候我會建在兩個包中,這個MyEclipse可以設定成不合並,但我沒找到
然後在下面src/main/resources檔案中建立配置檔案,你可以一個一個配置,也可以先建好,再往裡配置內容
首先設定jdbc.properties
driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/wetalk?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8&useSSL=false
username=root
password=123456
#定義初始連線數
initialSize=0
#定義最大連線數
maxActive=20
#定義最大空閒
maxIdle=20
#定義最小空閒
minIdle=1
#定義最長等待時間
maxWait=60000
註釋的很清楚,注意driver和url,剛才我說連線資料庫的jar包,以上是8.0.12的寫法,如果是5.*的,應該是
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/wetalk?useUnicode=true&characterEncoding=UTF-8
看清楚差別,否則連線資料庫會有問題,另外別忘了修改使用者名稱密碼以及庫名
然後是spring-mvc.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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:oxm="http://www.springframework.org/schema/oxm"
xsi:schemaLocation="http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-4.3.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
<!-- 包掃描 -->
<context:component-scan base-package="com.wanmait.wetalk.controller" />
<!-- 註解驅動 -->
<mvc:annotation-driven />
<mvc:default-servlet-handler />
<!-- 檢視解析 -->
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/jsp/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<!-- 配置檔案上傳,如果沒有使用檔案上傳可以不用配置,當然如果不配,那麼配置檔案中也不必引入上傳元件包 -->
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- 預設編碼 -->
<property name="defaultEncoding" value="utf-8" />
<!-- 檔案大小最大值 -->
<property name="maxUploadSize" value="52428800" />
<!-- 記憶體中的最大值 -->
<property name="maxInMemorySize" value="40960" />
<!--捕獲異常-->
<property value="true" name="resolveLazily"/>
</bean>
</beans>
注意修改掃描包名,這裡我上傳檔案設定的大小是50M
然後是log4j2.xml
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="OFF" monitorInterval="1800">
<properties>
<property name="LOG_HOME">/WEB-INF/logs</property>
<property name="FILE_NAME">finance-pay</property>
</properties>
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
</Console>
<RollingFile name="running-log" fileName="${LOG_HOME}/${FILE_NAME}.log"
filePattern="${LOG_HOME}/$${date:yyyy-MM}/${FILE_NAME}-%d{yyyy-MM-dd}-%i.log.gz"
immediateFlush="true">
<PatternLayout
pattern="%date{yyyy-MM-dd HH:mm:ss.SSS} %level [%thread][%file:%line] - %msg%n" />
<Policies>
<TimeBasedTriggeringPolicy />
<SizeBasedTriggeringPolicy size="10 MB" />
</Policies>
<DefaultRolloverStrategy max="20" />
</RollingFile>
</Appenders>
<Loggers>
<!-- <Logger name="com.cssweb.test.app" level="trace" additivity="true">
<AppenderRef ref="running-log" /> </Logger> -->
<Root level="info">
<!-- 這裡是輸入到檔案,很重要-->
<AppenderRef ref="running-log" />
<!-- 這裡是輸入到控制檯-->
<AppenderRef ref="Console" />
</Root>
</Loggers>
</Configuration>
log4j2是列印日誌的,這個我還沒學到,原樣寫總不會錯,沒啥需要改的,不需要也能啟動成功
最後是applicationContext.xml配置上下文環境
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mybatis="http://mybatis.org/schema/mybatis-spring"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:oxm="http://www.springframework.org/schema/oxm"
xsi:schemaLocation="http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-4.3.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring.xsd">
<!-- mybatis:scan會將com.app.mapper包裡的所有介面當作mapper配置,之後可以自動引入mapper類 -->
<mybatis:scan base-package="com.wanmait.wetalk.mapper" />
<!-- 掃描com.app包下面的java檔案,有Spring的相關注解的類,則把這些類註冊為Spring的bean -->
<context:component-scan base-package="com.wanmait.wetalk" />
<!-- 引入配置檔案 -->
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties" />
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<!-- 初始化連線大小 -->
<property name="initialSize" value="${initialSize}"></property>
<!-- 連線池最大數量 -->
<property name="maxActive" value="${maxActive}"></property>
<!-- 連線池最大空閒 -->
<property name="maxIdle" value="${maxIdle}"></property>
<!-- 連線池最小空閒 -->
<property name="minIdle" value="${minIdle}"></property>
<!-- 獲取連線最大等待時間 -->
<property name="maxWait" value="${maxWait}"></property>
</bean>
<!-- 配置SqlSessionFactory,org.mybatis.spring.SqlSessionFactoryBean是Mybatis社群開發用於整合Spring的bean -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"
p:dataSource-ref="dataSource" />
<!-- JDBC事務管理器 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref="dataSource" />
<!-- 啟用支援annotation註解方式事務管理 -->
<tx:annotation-driven transaction-manager="transactionManager" />
</beans>
注意有兩個地方需要修改包名,還有剛才jdbc的設定
最後離成功只有一步了,那就是web.xml的配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">
<display-name>wetalk</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<display-name>Archetype Created Web Application</display-name>
<!-- 配置spring核心監聽器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- contextConfigLocation引數用來指定Spring的配置檔案 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- 定義Spring MVC的前端控制器 -->
<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:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- 讓Spring MVC的前端控制器攔截所有請求 -->
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 編碼過濾器 -->
<filter>
<filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- log4j2-begin -->
<listener>
<listener-class>org.apache.logging.log4j.web.Log4jServletContextListener</listener-class>
</listener>
<filter>
<filter-name>log4jServletFilter</filter-name>
<filter-class>org.apache.logging.log4j.web.Log4jServletFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>log4jServletFilter</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
<dispatcher>INCLUDE</dispatcher>
<dispatcher>ERROR</dispatcher>
</filter-mapping>
<!-- log4j2-end -->
</web-app>
貼上的注意一下對應配置檔案的名字,這個地方我對log4j2還是有些疑惑,感覺其實沒有對映上去,暫時先這樣寫吧,反正影響不大…以後如果學了我會再修改
最後在右鍵點一下專案,最後properties,選擇紅色框中所選,點選Add
選擇框中所選,點next
點選Maven 點選finish
最後
最後的步驟相當於將maven下載的jar包新增到構建路徑
這樣理論上就搭建完成了,接下來測試一下能不能成功
先在WEB-INF/jsp下建立一個User資料夾,在建立一個login.jsp
裡面寫了一句話“測試一下能不能跳轉到登陸頁面 ”
然後在controller包下建立一個UserController
目錄結構如下
Controller寫
package com.wanmait.wetalk.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/User")
public class UserController {
@RequestMapping("/login")
public void login(){
}
}
就是一個轉發的控制器
儲存好然後新增到tomcat中,啟動伺服器,在位址列中輸入
http://127.0.0.1:8080/wetalk/User/login
如果跳轉,則搭建成功,失敗的話,再來一次吧…
後面我會遷移一個我做了一半的servlet-jdbc的專案過來
如果我有精力,會記錄一下過程,有需要的可以留言