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<dependencies> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.12</version> </dependency> <!--Junit--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> </dependency> <!--数据库驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency> <!-- 数据库连接池 --> <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> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>1.1.2</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> <!--maven资源过滤--> <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>
`ssmbuild``books`CREATE DATABASE `ssmbuild`; USE `ssmbuild`; DROP TABLE IF EXISTS `books`; CREATE TABLE `books` ( `bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id', `bookName` VARCHAR(100) NOT NULL COMMENT '书名', `bookCounts` INT(11) NOT NULL COMMENT '数量', `detail` VARCHAR(200) NOT NULL COMMENT '描述', KEY `bookID` (`bookID`) ) ENGINE=INNODB DEFAULT CHARSET=utf8 INSERT INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES (1,'Java',1,'从入门到放弃'), (2,'MySQL',10,'从删库到跑路'), (3,'Linux',5,'从进门到进牢');
建立pojo包,然后建立对应的实体类Books
package com.zhou.pojo; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; @Data @AllArgsConstructor @NoArgsConstructor public class Books { private int bookID; private String bookName; private String bookCounts; private String detail; }
mybatis-config.xml
<?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> <!--由spring 接管--> <!--<properties resource="db.properties"/>--> <typeAliases> <package name="com.zhou.pojo"/> </typeAliases> <!--<environments default="development">--> <!--<environment id="development">--> <!--<transactionManager type="JDBC"/>--> <!--<dataSource type="POOLED">--> <!--<property name="driver" value="${driver}"/>--> <!--<property name="url" value="${url}"/>--> <!--<property name="username" value="${user}"/>--> <!--<property name="password" value="${password}"/>--> <!--</dataSource>--> <!--</environment>--> <!--</environments>--> <mappers> <mapper resource="com/zhou/mapper/BookMapper.xml"/> </mappers> </configuration>
在此处注释掉的内容为后续mybatis测试数据库提供了一定的支持,后续由于有spring,则被spring接管,便被注释掉了!!
数据源文件:db.properties
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
# username=root
# password=123456
此处注释是由于测试时,总说用户和密码的问题,为防止名字和一些参数混淆,所以直接在后面采用固定的写法,所以注释掉
BookMapper
package com.zhou.mapper; import com.zhou.pojo.Books; import java.util.List; public interface BookMapper { //查询全部书 List<Books> getAllBooks(); //根据id 查询书 Books getBookByID(int id); //增加书籍 int addBook(Books books); //根据id删除书籍 int deleteBook(int id); //修改书籍 int updateBook(Books books); }
BookMapper.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"> <mapper namespace="com.zhou.mapper.BookMapper"> <!--根据对应的接口编写对应的xml--> <select id="getAllBooks" resultType="Books"> select * from ssmbuild.books </select> <select id="getBookByID" resultType="Books"> select * from ssmbuild.books where bookID=#{id} </select> <!--主键会自增!!!--> <insert id="addBook" parameterType="Books"> insert into ssmbuild.books(bookName,bookCounts,detail)values (#{bookName},#{bookCounts},#{detail}); </insert> <delete id="deleteBook" parameterType="int"> delete from ssmbuild.books where bookID=#{bookID} </delete> <update id="updateBook" parameterType="Books"> update ssmbuild.books set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail} where bookID=#{bookID} </update> </mapper>
mybatis整合完毕,进行相应的测试:
@org.junit.Test
public void Test1() throws IOException {
// InputStream is = BookMapper.class.getClassLoader().getResourceAsStream("db.properties");
String resource="mybatis-config.xml";
InputStream is = Resources.getResourceAsStream(resource);
SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(is);
SqlSession sqlSession = sessionFactory.openSession();
BookMapper bookMapper = sqlSession.getMapper(BookMapper.class);
List<Books> allBooks = bookMapper.getAllBooks();
for (Books allBook : allBooks) {
System.out.println(allBook);
}
}
在实际业务中,service是业务层,可以调用mapper层,故编写service层的接口和实现类,方便spring的接管
BookService
package com.zhou.service; import com.zhou.pojo.Books; import java.util.List; public interface BookService { //查询全部书 List<Books> getAllBooks(); //根据id 查询书 Books getBookByID(int id); //增加书籍 int addBook(Books books); //根据id删除书籍 int deleteBook(int id); //修改书籍 int updateBook(Books books); }
BookServiceImpl
import java.util.List; @Service public class BookServiceImpl implements BookService { @Autowired//自动将bean注入 private BookMapper bookMapper; public List<Books> getAllBooks() { List<Books> allBooks = bookMapper.getAllBooks(); return allBooks; } public Books getBookByID(int id) { return bookMapper.getBookByID(id); } public int addBook(Books books) { return bookMapper.addBook(books); } public int deleteBook(int id) { return bookMapper.deleteBook(id); } public int updateBook(Books books) { return bookMapper.updateBook(books); } }
此处采用注解的方式,将mapper层的对应bean进行注入,简单高效!
在这里将写四个配置文件:
applicationContext.xml 引入其他三个
spring-mapper.xml
spring-mvc.xml
spring-service.xml
spring-mapper.xml:需要引入数据元的配置文件,定义数据库连接池,获得sqlSession,方便操作直接数据库
<?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"> <!--引入数据源--> <context:property-placeholder location="classpath:db.properties"/> <!-- 2.数据库连接池 --> <!--数据库连接池 dbcp 半自动化操作 不能自动连接 c3p0 自动化操作(自动的加载配置文件 并且设置到对象里面) --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <!-- 配置连接池属性 --> <property name="driverClass" value="${driver}"/> <property name="jdbcUrl" value="${url}"/> <property name="user" value="root"/> <property name="password" value="123456"/> <!-- c3p0连接池的私有属性 --> <property name="maxPoolSize" value="30"/> <property name="minPoolSize" value="10"/> <!-- 关闭连接后不自动commit --> <property name="autoCommitOnClose" value="false"/> <!-- 获取连接超时时间 --> <property name="checkoutTimeout" value="10000"/> <!-- 当获取连接失败重试次数 --> <property name="acquireRetryAttempts" value="2"/> </bean> <!--sessionFactory--> <bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sessionFactory"> <property name="dataSource" ref="dataSource"/> <property name="configLocation" value="classpath:mybatis-config.xml"/> </bean> <!--session--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" id="mapperScannerConfigurer"> <property name="sqlSessionFactoryBeanName" value="sessionFactory"/> <property name="basePackage" value="com.zhou.mapper"/> </bean> </beans>
spring-service.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 https://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="com.zhou.service"/> <!--<import resource="spring-mapper.xml"/>--> <bean class="com.zhou.service.BookServiceImpl"> <!--<property name="bookMapper" ref="bookMapper"/>--> </bean> <!-- 配置事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!-- 注入数据库连接池 --> <property name="dataSource" ref="dataSource" /> </bean> </beans>
在此处进行了事务的配置,以及将mapper层的bean进行了注册,并且开启了自动扫描service层的包。
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"> <!--扫描相关的bean--> <context:component-scan base-package="com.zhou.controller"/> <!--开启注解驱动--> <mvc:default-servlet-handler/> <mvc:annotation-driven/> <!--<import resource="spring-service.xml"/>--> <!--视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> </bean> <bean class="com.zhou.service.BookServiceImpl" id="bookService"/> </beans>
此处的整合可以详细参考springmvc的博客
博客地址
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">
<import resource="spring-mapper.xml"/>
<import resource="spring-mvc.xml"/>
<import resource="spring-service.xml"/>
</beans>
在这里必须将项目添加web的支持
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0"> <!--注册DispatcherServlet--> <servlet> <servlet-name>DispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> <!--<param-value>classpath:spring-mvc.xml</param-value>--> </init-param> </servlet> <servlet-mapping> <servlet-name>DispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!--乱码过滤器--> <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过期时间--> <session-config> <session-timeout>15</session-timeout> </session-config> </web-app>
注意此处关联的配置文件为:applicationContext.xml
编写controller层
Bookcontroller
package com.zhou.controller; import com.zhou.pojo.Books; import com.zhou.service.BookService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import java.util.List; //调用业务层 @Controller @RequestMapping("/book") public class Bookcontroller { @Autowired private BookService bookService; @RequestMapping("/allbook") public String allbook(Model model) { System.out.println("Bookcontroller进来了"); List<Books> list = bookService.getAllBooks(); model.addAttribute("list",list); System.out.println(list); return "allBooks"; } // 新增书籍 @RequestMapping("/toaddBook") public String toaddBook(){ return "addBook"; } @RequestMapping("/addBookget") public String addBook(Books book){ //注意是从前台获得增加的书籍,添加到后台 bookService.addBook(book); System.out.println("增加的书:"+book); return "redirect:/book/allbook"; } //修改书籍 携带书的id进行跳转 @RequestMapping("/toupdateBook") public String toupdate(int id,Model model){ //根据书的id进行查询 Books book = bookService.getBookByID(id); System.out.println("修改的书籍为:"+book); model.addAttribute("updatebook",book); return "updateBook"; } @RequestMapping("/updateBookget") public String update(Books book){ bookService.updateBook(book); Books book1 = bookService.getBookByID(book.getBookID()); // model.addAttribute("book1",book1); System.out.println("修改好的书籍为:"+book1); return "redirect:/book/allbook"; } //删除书籍 @RequestMapping("/deleteBook") public String delete(int id){ int i = bookService.deleteBook(id); System.out.println("删除的书籍"+i); return "redirect:/book/allbook"; } }
此处是书籍增删改查全部执行程序,接下来分开详细进行介绍,注意开程序编写时,要多进行调试,确实程序没有问题,才接着往下写!!
index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>书籍列表</title>
</head>
<body>
<a href="${pageContext.request.contextPath}/book/allbook">点击进入列表</a>
</body>
</html>
样式比较丑,可以后期进行修改!
全部书籍显示:
allBooks.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%--上面的必须加,否则无法引入标签--%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>全部书籍</title> </head> <div style=" width:100% " > <table> <thead > <tr> <td>书籍编号</td> <td>书籍名称</td> <td>书籍数量</td> <td>书籍详情</td> <td> <a href="${pageContext.request.contextPath}/book/toaddBook">新增</a> </td> </tr> </thead> <tbody> <c:forEach var="book" items="${list}"> <tr> <td>${book.bookID}</td> <td>${book.bookName}</td> <td>${book.getBookCounts()}</td> <td>${book.getDetail()}</td> <td> <a href="${pageContext.request.contextPath}/book/toupdateBook?id=${book.bookID}">更改</a> <a href="${pageContext.request.contextPath}/book/deleteBook?id=${book.bookID}">删除</a> </td> </tr> </c:forEach> </tbody> </table> </div> <body> </body> </html>
此处由于要循环遍历,所以引入了标签库
新增书籍:
addBook.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>新增书籍</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/book/addBookget">
书籍名称:<input type="text" name="bookName"><br>
书籍数量:<input type="text" name="bookCounts"><br>
书籍详情:<input type="text" name="detail"><br>
<input type="submit" value="添加">
</form>
</body>
</html>
通过表单进行提交,由于id可以自增,所以不需要管!!
修改书籍
updateBook.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>修改书籍</title> </head> <body> <form action="${pageContext.request.contextPath}/book/updateBookget"> <input type="hidden" name="bookID" value="${updatebook.getBookID()}"> 书籍名称:<input type="text" name="bookName" value="${updatebook.getBookName()}"><br> 书籍数量:<input type="text" name="bookCounts"value="${updatebook.getBookCounts()}"><br> 书籍详情:<input type="text" name="detail"value="${updatebook.getDetail()}"><br> <input type="submit" value="修改"> </form> </body> </html>
删除书籍:
删除书籍不需要进行页面跳转,所以直接在控制层根据id删除即可
以上就是项目的整体程序以及运行结果!!
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