SpringMVC-ssm案例-2023-04-23
一、准备工作
1.1、搭建普通maven项目，framework的 web项目
1.2、加载maven依赖：junit - mysql-connector-C3P01
servlet-jsp / JSTL
MyBatis MyBatis-spring
spring-webmvc / jdbc
lombok
build 资源加载问题
1.3、加载Project Structure --- > lib
1.4、连接数据库
1.5、建包 com.feijian.pojo/service/dao/controller
1.6、配置 mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"https://mybatis.org/dtd/mybatis-3-config.dtd">
<!--configuration 核心配置文件 -->
<configuration>
</configuration>1.7、配置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-2.5.xsd">
</beans>二、编写MyBatis层
2.1 配置：database.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=1234562.2 Idea连接数据库 ssmbuild
2.3 在mybatis-config.xml文件中 增加配置 ：1、别名 2、BookMapper.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>
<!--别名-->
<typeAliases>
<package name="com.feijian.pojo"/>
</typeAliases>
<mappers>
<mapper resource="com/feijian/dao/BookMapper.xml"/>
</mappers>
</configuration>2.4 编写pojo 实体例。采用注解 @Data @AllargsConstructor @ NoargsConstructor
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
private int bookID;
private String bookName;
private int bookCounts;
private String detail;
}2.5 写dao接口类
public interface BookMapper {
//增加一个Book
int addBook(Books book);
//根据id删除一个Book
int deleteBookById(int id);
//更新Book
int updateBook(Books books);
//根据id查询,返回一个Book
Books queryBookById(int id);
//查询全部Book,返回list集合
List<Books> queryAllBook();2.6 写dao接口类的 BookMapper.xml （MySql语句，用.xml文件代替接口实现类。增删改查 select / insert / update / delete ）
<?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.feijian.dao.BookMapper">
<insert id="addBook" parameterType="Books">
insert into ssmbuild.books (bookName, bookCounts, detail)
VALUES (#{bookName},#{bookCounts},#{detail});
</insert>
<delete id="deleteBookById" 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>
<select id="queryBookById" resultType="books">
select * from ssmbuild.books where bookID = #{bookId};
</select>
<select id="queryAllBook" resultType="books">
select * from ssmbuild.books;
</select>
</mapper>2.7 写Service接口类
public interface BookService {
//增加一个Book
int addBook(Books book);
//根据id删除一个Book
int deleteBookById(int id);
//更新Book
int updateBook(Books books);
//根据id查询,返回一个Book
Books queryBookById(int id);
//查询全部Book,返回list集合
List<Books> queryAllBook();2.8 写Service 实现类
public class BookServiceImpl implements BookService {
//service业务层调dao层 : 组合Dao
private BookMapper bookMapper;
public void setBookMapper(BookMapper bookMapper) {
this.bookMapper = bookMapper;
}
public int addBook(Books books) {
return bookMapper.addBook(books);
}
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();
}三、配置 (Spring 整合MyBatis 和 Service )
3.1 Spring 整合 dao层- MyBatis 连接数据库 spring-dao.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">
<!--1.关联数据库配置文件-->
<context:property-placeholder location="classpath:database.properties" />
<!--2.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（自动化的加载配置文件，而且可以自动设置到对象中！）
druid ; hikari;
-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<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>
<!--3.sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!--绑定Mybatis的配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml" />
</bean>
<!-- 4.配置扫描Dao接口包，动态实现Dao接口注入到spring容器中 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--注入SqlSessionFactory-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
<!-- 需要扫描Dao接口包 -->
<property name="basePackage" value="com.feijian.dao" />
</bean>
</beans>3.2 Spring 整合Service层 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">
<!--1.扫描service下的包-->
<context:component-scan base-package="com.feijian.service" />
<!--2.将我们的所有业务类，注入到Spring，可以通过配置，或者注解实现-->
<bean id="BookServiceImpl" class="com.feijian.service.BookServiceImpl">
<property name="bookMapper" ref="bookMapper" />
</bean>
<!--3.声明式事务配置-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!-- 注入数据库连接池 -->
<property name="dataSource" ref="dataSource" />
</bean>
<!--4.aop事务支持-->
</beans>四、SpringMVC层
4.1 配置 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">
<!--DispatcherServlet-->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<!--一定要注意:我们这里加载的是总的配置文件，之前被这里坑了！-->
<param-value>classpath:applicationContext.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>
<!--乱码过滤-->
<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>
</web-app>4.2 配置 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:mvc="http://www.springframework.org/schema/mvc"
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/mvc
https://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
<!--1.注解驱动-->
<mvc:annotation-driven />
<!--2.静态资源过滤-->
<mvc:default-servlet-handler />
<!--3.扫描包：controller-->
<context:component-scan base-package="com.feijian.controller" />
<!--4.视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!--前缀-->
<property name="prefix" value="/WEB-INF/jsp/" />
<!--后缀-->
<property name="suffix" value=".jsp" />
</bean>
</beans>4.3 applicationContext.xml 导入 三个.xml文件
第一个为：spring-dao.xml 数据库连接 也导入：database.properties 其中：spring-dao.xml中绑定了mybatis-config.xml
<!--1.关联数据库配置文件-->
<context:property-placeholder location="classpath:database.properties" /><!--绑定Mybatis的配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml" />第二个为：spring-service.xml
第三个为：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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
<import resource="spring-mvc.xml"/>
<import resource="spring-dao.xml"/>
<import resource="spring-service.xml"/>
</beans>五、Controller层 和视图层编写 在WEB-INF/下新建jsp文件夹 之后的用户自定义页面放这个文件夹之下
5.1 写Controller类
@Controller
@RequestMapping("/book")
public class BookController {
@Autowired
@Qualifier("BookServiceImpl")
BookService bookService;
//查询全部书籍，并返回一个书籍展示页面
public String list(Model model){
List<Books> books = bookService.queryAllBook();
model.addAttribute("list",books);
return "allBook";
}
}5.2 编写index.jsp 首页页面元素 注意跳转的响应 “/book/allBook”-点击就根据这个响应去controller层去找对应这个响应的方法，找到后执行方法，return的就是要转发的新地址
通过视图解析器，将return返回的值进行前后缀拼装
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>首页</title>
<style>
a{
text-decoration: none;
color: black;
font-size: 18px;
}
h3{
width: 180px;
height: 38px;
margin: 100px auto;
text-align: center;
line-height: 38px;
background: deepskyblue;
border-radius: 5px;
}
</style>
</head>
<body>
<h3>
<a href="${pageContext.request.contextPath}/book/allBook">进入书籍页面</a>
</h3>
</body>
</html>5.3 写allBook.jsp页面
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>书籍展示页面</title>
<%--BootStrap美化界面--%>
<!-- 引入 Bootstrap -->
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>书籍列表 ———— 显示所有书籍</small>
</h1>
</div>
</div>
</div>
<div class="col-md-4 column">
<%--跳转到添加书籍页面--%>
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a>
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allBook">显示全部书籍</a>
</div>
<div class="col-md-4 column"></div>
<div class="col-md-4 column">
<%--查询书籍--%>
<form class="form-inline" action="${pageContext.request.contextPath}/book/queryBook" method="post" style="float: right"> <%--form-inline:将按键显示在一行--%>
<span style="color: red;font-weight: bold">${error}</span>
<input type="text" name="queryBookName" class="form-control" placeholder="请输入要查询的书籍名称"> <%--placeholder:提示信息--%>
<input type="submit" value="查询" class="btn bt-primary">
</form>
</div>
<div class="row clearfix">
<div class="col-md-12 column">
<table class="table table-hover table-striped"><%--table-hover:鼠标放上发亮,table-striped:隔行变色--%>
<thead>
<tr>
<%-- <th>书籍编号</th>--%>
<th>书籍名称</th>
<th>书籍数量</th>
<th>书籍详情</th>
</tr>
</thead>
<%--书籍从数据库中查询出来，从这个list中遍历出来--%>
<tbody>
<c:forEach var="book" items="${list}">
<tr>
<%-- <td>${book.bookID}</td>--%>
<td>${book.bookName}</td>
<td>${book.bookCounts}</td>
<td>${book.detail}</td>
<td>
<a href="${pageContext.request.contextPath}/book/toUpdateBook/${book.bookID}">修改</a>
|
<a href="${pageContext.request.contextPath}/book/deleteBook/${book.bookID}">删除</a>
</td>
</tr>
</c:forEach>
</tbody>
</table>
</div>
</div>
</div>
</body>
</html>六、Tomcat 调试第一个页面 -查询所有书籍功能实现
