在Vue頁面中如何更優雅地引入圖片詳解
阿新 • • 發佈：2021-12-10
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1.新建一個maven專案，新增專案對於web的支援
在idea中連線資料庫
2.在pom.xml檔案中新增專案依賴
<dependencies> <!--Junit--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!--資料庫驅動--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.35</version> </dependency> <!--資料庫連線池 --> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <!--Servlet - JSP --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!--Mybatis--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.5.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.2</version> </dependency> <!--Spring--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.9.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.1.9.RELEASE</version> </dependency> </dependencies> <build> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> <resource> <directory>src/main/resources</directory> <includes> <include>**/*.properties</include> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources> </build>
4.新建applicationContext.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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> </beans>
5.新建database.properties配置資料庫的連線屬性，注意mysql8和mysql5配置不同
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&useUnicode=true&characterEncoding=utf8&serverTimezone=Asia/Shanghai jdbc.username=root jdbc.password=123456
6.新建mybatis-config.xml，並且設定實體類包名稱與對映檔案
<?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> <typeAliases> <package name="com.samukawa.pojo"></package> </typeAliases> <mappers> <mapper resource="com/samukawa/dao/BookMapper.xml"></mapper> </mappers> </configuration>
7.新建spring-dao.xml配置spring接管mybatis，關聯上面的database.properties
<?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 https://www.springframework.org/schema/context/spring-context.xsd"> <!-- 配置整合mybatis --> <!-- 1.關聯資料庫檔案 --> <context:property-placeholder location="classpath:database.properties"/> <!-- 2.資料庫連線池 --> <!--資料庫連線池 dbcp 半自動化操作 不能自動連線 c3p0 自動化操作（自動的載入配置檔案 並且設定到物件裡面） --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <!-- 配置連線池屬性 --> <property name="driverClass" value="${jdbc.driver}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> <!-- c3p0連線池的私有屬性 --> <property name="maxPoolSize" value="30"/> <property name="minPoolSize" value="10"/> <!-- 關閉連線後不自動commit --> <property name="autoCommitOnClose" value="false"/> <!-- 獲取連線超時時間 --> <property name="checkoutTimeout" value="10000"/> <!-- 當獲取連線失敗重試次數 --> <property name="acquireRetryAttempts" value="2"/> </bean> <!-- 3.配置SqlSessionFactory物件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 注入資料庫連線池 --> <property name="dataSource" ref="dataSource"/> <!-- 配置MyBaties全域性配置檔案:mybatis-config.xml --> <property name="configLocation" value="classpath:mybatis-config.xml"/> </bean> <!-- 4.配置掃描Dao介面包，動態實現Dao介面注入到spring容器中 --> <!--解釋 ：https://www.cnblogs.com/jpfss/p/7799806.html--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 注入sqlSessionFactory --> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!-- 給出需要掃描Dao介面包 --> <property name="basePackage" value="com.samukawa.dao"/> </bean> </beans>
8.配置spring-service.xml 使用spring整合service層，掃描service，注入service層實現類，配置事務
<?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"> <!-- 掃描service相關的bean --> <context:component-scan base-package="com.samukawa.service" /> <!--BookServiceImpl注入到IOC容器中--> <bean id="BookServiceImpl" class="com.samukawa.service.BookServiceImpl"> <property name="bookMapper" ref="bookMapper"/> </bean> <!-- 配置事務管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!-- 注入資料庫連線池 --> <property name="dataSource" ref="dataSource" /> </bean> </beans>
9.配置MVC層，編寫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: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 https://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!-- 配置SpringMVC --> <!-- 1.開啟SpringMVC註解驅動 --> <mvc:annotation-driven /> <!-- 2.靜態資源預設servlet配置--> <mvc:default-servlet-handler/> <!-- 3.配置jsp 顯示ViewResolver檢視解析器 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> <!-- 4.掃描web相關的bean --> <context:component-scan base-package="com.samukawa.controller" /> </beans>
10.配置web.xml，載入applicationContext.xml配置編碼過濾
<!--DispatcherServlet--> <servlet> <servlet-name>DispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <!--一定要注意:我們這裡載入的是總的配置檔案，之前被這裡坑了！--> <param-value>classpath:applicationContext.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>DispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!--encodingFilter--> <filter> <filter-name>encodingFilter</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>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!--Session過期時間--> <session-config> <session-timeout>15</session-timeout> </session-config>
11.整合applicationContext.xml將上述spring-mvc,spring-dao,spring-service整合到applicationContext.xml中
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <import resource="spring-dao.xml"/> <import resource="spring-service.xml"/> <import resource="spring-mvc.xml"/> </beans>
開始編碼部分
1.首先依據資料庫建立實體類pojo，生成無參，有參，get set方法。
2.在dao層新建介面，對應想要對資料庫進行的操作
package com.samukawa.dao; import com.samukawa.pojo.Books; import java.util.List; public interface BookMapper { //增加一個Book int addBook(Books book); //根據id刪除一個Book int deleteBookById(int id); //更新Book int updateBook(Books books); //根據id查詢,返回一個Book Books queryBookById(int id); //查詢全部Book,返回list集合 List<Books> queryAllBook(); }
3.在dao層新建對映檔案 .xml ，新增介面到mapper名空間
<?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"> <mapper namespace="com.samukawa.dao.BookMapper"> <!--增加一個Book--> <insert id="addBook" parameterType="Books"> insert into ssmbuild.books(bookName,bookCounts,detail) values (#{bookName}, #{bookCounts}, #{detail}) </insert> <!--根據id刪除一個Book--> <delete id="deleteBookById" parameterType="int"> delete from ssmbuild.books where bookID=#{bookID} </delete> <!--更新Book--> <update id="updateBook" parameterType="Books"> update ssmbuild.books set bookName = #{bookName},bookCounts = #{bookCounts},detail = #{detail} where bookID = #{bookID} </update> <!--根據id查詢,返回一個Book--> <select id="queryBookById" resultType="Books"> select * from ssmbuild.books where bookID = #{bookID} </select> <!--查詢全部Book--> <select id="queryAllBook" resultType="Books"> SELECT * from ssmbuild.books </select> </mapper>
4.在mybatis-config.xml中的mappers中新增mapper
<?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> <typeAliases> <package name="com.samukawa.pojo"></package> </typeAliases> <mappers> <mapper resource="com/samukawa/dao/BookMapper.xml"></mapper> </mappers> </configuration>
5.編寫service層介面和實現類
介面
package com.samukawa.service; import com.samukawa.pojo.Books; import java.util.List; public interface BookService { //增加一個Book int addBook(Books book); //根據id刪除一個Book int deleteBookById(int id); //更新Book int updateBook(Books books); //根據id查詢,返回一個Book Books queryBookById(int id); //查詢全部Book,返回list集合 List<Books> queryAllBook(); }
實現類
package com.samukawa.service; import com.samukawa.pojo.Books; import java.util.List; public class BookServiceImpl implements BookService{ public int addBook(Books book) { return 0; } public int deleteBookById(int id) { return 0; } public int updateBook(Books books) { return 0; } public Books queryBookById(int id) { return null; } public List<Books> queryAllBook() { return null; } }
向實現類新增dao層的Mapper介面，在實現類呼叫該mapper類完成資料庫操作
但是首先需要在spring-service.xml中注入實現類和mapper介面
<!--業務注入spring--> <bean id="BookServiceImpl" class="com.sa.service.BookServiceImpl"> <property name="bookMapper" ref="bookMapper"/> </bean>
並且在實現類中新增bookMapper和其set方法以便於注入
public class BookServiceImpl implements BookService{ private BookMapper bookMapper; public void setBookMapper(BookMapper bookMapper) { this.bookMapper = bookMapper; } }
實現類的其他方法，不需要特殊操作，留到controller層
package com.samukawa.service; import com.samukawa.dao.BookMapper; import com.samukawa.pojo.Books; import java.util.List; public class BookServiceImpl implements BookService{ private BookMapper bookMapper; public void setBookMapper(BookMapper bookMapper) { this.bookMapper = bookMapper; } public int addBook(Books book) { return bookMapper.addBook(book); } public int deleteBookById(int id) { return bookMapper.deleteBookById(id); } public int updateBook(Books books) { return bookMapper.updateBook(books); } public Books queryBookById(int id) { return bookMapper.queryBookById(id); } public List<Books> queryAllBook() { return bookMapper.queryAllBook(); } }
6.編寫controller層
填寫一個BookController類，用註解標記為Controller，設定請求路徑RequestMapping為("/book")
並且使用autowire註解自動注入service的實現類
package com.samukawa.controller; import com.samukawa.pojo.Books; import com.samukawa.service.BookService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import java.util.List; @Controller @RequestMapping("/book") public class BookController { @Autowired @Qualifier("BookServiceImpl") private BookService bookService; @RequestMapping("/allBook") public String allBook(Model model){ List<Books> list = bookService.queryAllBook(); model.addAttribute("list",list); System.out.println("111"); return "allbook"; } }
jsp頁面
<%-- Created by IntelliJ IDEA. User: lenovo Date: 2021/12/17 Time: 10:28 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>$Title$</title> </head> <body> <a href="${pageContext.request.contextPath}/book/allBook">點選進入列表頁</a> </body> </html>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%-- Created by IntelliJ IDEA. User: lenovo Date: 2021/12/17 Time: 12:04 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <!-- 最新版本的 Bootstrap 核心 CSS 檔案 --> <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous"> <html> <head> <title>Title</title> </head> <body> <div class="container"> <table> <thead> <tr> <th></th> <th></th> <th></th> </tr> </thead> <tbody> <c:forEach items="${list}" var="book"> <tr> <td>${book.bookID}</td> <td>${book.bookName}</td> <td>${book.bookCounts}</td> <td>${book.detail}</td> </tr> </c:forEach> </tbody> </table> </div> </body> </html>
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