SSM框架开发-基础案例
SSM框架整合基础案例详解
1.数据库环境
创建一个存放书籍数据的数据库表
点击查看代码
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');
2.基本环境搭建
2.1 新建一Maven项目,ssmbuild,添加web的支持
2.2 导入相关的pom依赖
点击查看代码
<!--依赖问题-->
<dependencies>
<!-- junit驱动 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<!-- mysql驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.21</version>
</dependency>
<!--数据库连接池:c3p0-->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.5</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驱动 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.7</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
<!--Spring-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.9</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.9</version>
</dependency>
</dependencies>
2.3 Maven资源过滤设置
点击查看代码
<!--静态资源导出问题-->
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
</build>
2.4 建立基本结构和配置框架
- com.mc.pojo
- com.mc.dao
- com.mc.service
- com.mc.controller
- mybatis-config.xml
<?xml version="1.0" encoding="UTF8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
</configuration>
- 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
https://www.springframework.org/schema/beans/spring-beans.xsd">
</beans>
3.Mybatis层编写
3.1 数据库配置文件database.properties
jdbc.driver=com.mysql.cj.jdbc.Driver
# 如果使用的是MySQL8.0+,增加一个时区的配置 &serverTimezone=Asia/Shanghai
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=UTF-8&allowPublicKeyRetrieval=true
jdbc.username=root
jdbc.password=mc123456
3.2 IDEA关联数据库
3.3 编写MyBatis的核心配置文件
点击查看代码
<?xml version="1.0" encoding="UTF8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<!-- configuration核心配置文件 -->
<configuration>
<!-- 可以给实体类起别名 -->
<typeAliases>
<package name="com.mc.pojo"/>
</typeAliases>
<mappers>
<mapper class="com.mc.dao.BookMapper"/>
</mappers>
</configuration>
3.4 编写数据库对应的实体类com.mc.pojo.Books
使用lombok插件!
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
private int bookID;
private String bookName;
private int bookCounts;
private String detail;
}
3.5 编写Dao层的Mapper接口
public interface BookMapper {
// 增加一本书
int addBook(Books books);
// 删除一本书
int deleteBookById(@Param("bookId") int id);
// 更新一本书
int updateBook(Books books);
// 查询一本书
Books queryBookById(@Param("bookId") int id);
// 查询全部的书
List<Books> queryAllBook();
}
3.6 编写接口对应的Mapper.xml文件,需要导入MyBatis的包
点击查看代码
<?xml version="1.0" encoding="UTF8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.mc.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>
3.7 编写Service层的接口和实现类
接口:
public interface BookService {
// 增加一本书
int addBook(Books books);
// 删除一本书
int deleteBookById(int id);
// 更新一本书
int updateBook(Books books);
// 查询一本书
Books queryBookById(int id);
// 查询全部的书
List<Books> queryAllBook();
}
实现类:
点击查看代码
public class BookServiceImpl implements BookService {
// service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();
}
}
4.Spring层编写
4.1 配置Spring整合MyBatis,我们这里数据源使用c3p0连接池
4.2 我们去编写Spring整合Mybatis的相关的配置文件:spring-dao.xml
点击查看代码
<?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
https://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.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,并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"/>
<!--当获取连按失败重试次数-->
<property name="acquireRetryAttempts" value="2"/>
</bean>
<!--3.sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!--绑定Mybatis配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>
<!--4.配置dao接口扫描包,动态的实现了Dao接口可以注入到Spring容器中!-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--注入sqlSessionFactory -->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<!--要扫描的dao包-->
<property name="basePackage" value="com.mc.dao" />
</bean>
</beans>
4.3 Spring整合service层
点击查看代码
<?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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
https://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
https://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--1.扫描service下的包-->
<context:component-scan base-package="com.mc.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.mc.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">
<!--注入数据源-->
<property name="dataSource" ref="dataSource"/>
</bean>
<!--4.aop事务支持!-->
<!--配置声明式事务-->
<bean id="transactionManage" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!--结合AOP实现事务的织入-->
<!--配置事务通知-->
<tx:advice id="txAdvice" transaction-manager="transactionManage">
<!--给哪些方法配置事务-->
<!--配置事务的传播特性: propagation-->
<tx:attributes>
<tx:method name="*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<!--配置事务切入-->
<aop:config>
<aop:pointcut id="txPointCut" expression="execution(* com.mc.dao.*.*(..))"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointCut"/>
</aop:config>
</beans>
Spring层搞定!再次理解一下,Spring就是一个大杂烩,一个容器!
5.SpringMVC层编写
5.1 web.xml
点击查看代码
<?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">
<!--配置DispatchServlet:这个是SpringMVC的核心,请求分发器,前端控制器-->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--DispatchServlet要绑定(关联)一个springmvc的配置文件:【servlet-name】-servlet.xml-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</init-param>
<!--启动级别-1-->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--配置SpringMVC的乱码过滤器-->
<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-->
<session-config>
<session-timeout>15</session-timeout>
</session-config>
</web-app>
5.1 spring-mvc.xml
点击查看代码
<?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
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--1.注解驱动-->
<mvc:annotation-driven/>
<!--2.静态资源过滤-->
<mvc:default-servlet-handler/>
<!--3.自动扫描包:controller-->
<context:component-scan base-package="com.mc.controller"/>
<!--4.视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver">
<!--前缀-->
<property name="prefix" value="/WEB-INF/jsp/"/>
<!--后缀-->
<property name="suffix" value=".jsp"/>
</bean>
</beans>
5.3 Spring配置整合文件,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
https://www.springframework.org/schema/beans/spring-beans.xsd">
<import resource="classpath:spring-dao.xml"/>
<import resource="classpath:spring-service.xml"/>
<import resource="classpath:spring-mvc.xml"/>
</beans>
配置文件,暂时结束!
6.Controller和视图层编写
6.1 BookController 类编写,方法一:查询全部书籍
点击查看代码
@Controller
@RequestMapping("/book")
public class BookController {
// controller 调 service层
@Autowired
@Qualifier("BookServiceImpl")
public BookService bookService;
// 查询全部的书籍,并返回到一个书籍展示页而
@RequestMapping("/allBook")
public String list(Model model) {
List<Books> list = bookService.queryAllBook();
model.addAttribute("list", list);
return "allBook";
}
}
6.2 编写首页index.jsp
点击查看代码
<%@ 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="${pageContext.request.contextPath}/book/allBook">进入书籍页面</a>
</h3>
</body>
</html>
6.3 书籍列表页面allbook.jsp
点击查看代码
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>书籍展示</title>
<%--BootStrap美化界面--%>
<link href= "https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
</head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<smal1>书籍列表 ———— 显示所有书籍</smal1>
</h1>
</div>
</div>
<div class="row" >
<div class="col-md-4 column">
<%--toAddBook--%>
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a>
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allBook">显示全部书籍</a>
</div>
<div class="col-md-4 column"></div>
<div class="col-md-4 column">
<%--搜索查询书籍--%>
<form class="form-inline" action="${pageContext.request.contextPath}/book/queryBook" method="post" style="float: right">
<span style="color:red;font-weight: bold">${error}</span>
<input type="text" name= "queryBookName" class="form-control" placeholder="请输入要查询的书籍名称">
<input type="submit" value="查询" class="btn btn-primary">
</form>
</div>
</div>
</div>
<div class="row clearfix">
<div class="col-md-12 column">
<table class="table table-hover table-striped">
<thead>
<tr>
<th>书籍编号</th>
<th>书籍名称</th>
<th>书籍数量</th>
<th>书籍详情</th>
<th>操作</th>
</tr>
</thead>
<%--书籍从数据库中查询出来,从这个list中遍历出来:foreach--%>
<tbody>
<c:forEach var="book" items="${list}">
<tr>
<td>${book.bookID}</td>
<td>${book.bookName}</td>
<td>${book.bookCounts}</td>
<td>${book.detail}</td>
<td>
<a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.bookID}">修改</a>
|
<a href="${pageContext.request.contextPath}/book/toDeleteBook/${book.bookID}">删除</a>
</td>
</tr>
</c:forEach>
</tbody>
</table>
</div>
</div>
</div>
</body>
</html>
6.4 BookController类编写,方法二:添加书籍
点击查看代码
// 跳转到增加书籍页面
@RequestMapping("/toAddBook")
public String toAddPaper(){
return "addBook";
}
//添加书籍的请求
@RequestMapping("/addBook")
public String addBook(Books books){
System.out.println("addBook=>"+books);
bookService.addBook(books);
return "redirect:/book/allBook";
}
6.5 添加书籍页面:addBook.jsp
点击查看代码
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>新增书籍</title>
<%--BootStrap美化界面--%>
<link href= "https://cdn.staticfile.org/twitter-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>
<smal1>新增书籍</smal1>
</h1>
</div>
</div>
</div>
<form action="${pageContext.request.contextPath}/book/addBook" method="post">
<div class="form-group">
<label>书籍名称</label>
<input type="text" name="bookName" class="form-control" required>
</div>
<div class="form-group">
<label>书籍数量</label>
<input type="text" name="bookCounts" class="form-control" required>
</div>
<div class="form-group">
<label>书籍描述</label>
<input type="text" name="detail" class="form-control" required>
</div>
<div class="form-group">
<input type="submit" class="form-control" value="添加">
</div>
</form>
</div>
</body>
</html>
6.6 BookController类编写,方法三:修改书籍
// 跳转到修改书籍页面
@RequestMapping("/toUpdateBook")
public String toUpdatePaper(int id,Model model){
Books book = bookService.queryBookById(id);
model.addAttribute("Qbook",book);
return "updateBook";
}
//修改书籍的请求
@RequestMapping("/updateBook")
public String updateBook(Books books){
System.out.println("updateBook=>"+books);
bookService.updateBook(books);
return "redirect:/book/allBook";
}
6.7 修改书籍页面:updateBook.jsp
点击查看代码
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>修改书籍</title>
<%--BootStrap美化界面--%>
<link href= "https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"/>
</head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<smal1>修改书籍</smal1>
</h1>
</div>
</div>
</div>
<form action="${pageContext.request.contextPath}/book/updateBook" method="post">
<%--出现的问题:我们提交了修改的SQL请求,但是修改失败,初次考虑,是事务问题,配置完毕事务,依旧失败!--%>
<%--看一下SQL语句,能否执行成功,SQL执行失败,修改未完成--%>
<%--前端传递隐藏域--%>
<input type="hidden" name="bookID" value="${Qbook.bookID}">
<div class="form-group">
<label>书籍名称</label>
<input type="text" name="bookName" class="form-control" required value="${Qbook.bookName}">
</div>
<div class="form-group">
<label>书籍数量</label>
<input type="text" name="bookCounts" class="form-control" required value="${Qbook.bookCounts}">
</div>
<div class="form-group">
<label>书籍描述</label>
<input type="text" name="detail" class="form-control" required value="${Qbook.detail}">
</div>
<div class="form-group">
<input type="submit" class="form-control" value="修改">
</div>
</form>
</div>
</body>
</html>
6.8 BookController类编写,方法四:删除书籍
// 删除书籍请求
@RequestMapping("/toDeleteBook/{bookId}")
public String toDeletePaper(@PathVariable("bookId") int id){
bookService.deleteBookById(id);
return "redirect:/book/allBook";
}
6.9 BookController类编写,方法五:搜索查询书籍
// 搜索查询书籍
@RequestMapping("/queryBook")
public String queryBook(String queryBookName, Model model) {
Books books = bookService.queryBookByName(queryBookName);
List<Books> list = new ArrayList<Books>();
list.add(books);
if (books == null){
list = bookService.queryAllBook();
model.addAttribute("error","未查到");
}
model.addAttribute("list",list);
return "allBook";
}
配置Tomcat,进行运行!
7.小结及展望
- 这是一个基础的SSM整合案例
- 掌握这个就已经可以进行基本网站的单独开发
- 功能只有增删改查等基本操作