SSM框架整合
SSM-CRUD
Sam:SpringMVC+Spring+Mybatis
CRUD:
Create（创建）
Retrieve（查询）
Update（更新）
Delete（删除）
环境要求：
+ Idea
+ MySSQL
+ Tomcat
+ Maven
要求：
需要熟练掌握MySQL数据库，Spring，JavaWEB及MyBatis知识，简单的前端知识；
Mybatis层
1.数据库环境
1 DROP TABLE IF EXISTS `books`;
2 CREATE TABLE books (
3
4 bookID int NOT NULL COMMENT '书id',
5
6 bookName varchar(100) NOT NULL COMMENT '书名',
7
8 bookCounts int NOT NULL COMMENT '数量',
9
10 detail varchar(200) NOT NULL COMMENT '描述',
11
12 PRIMARY KEY (bookID)
13
14 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb3;
15
16 -- Records of books
17
18 BEGIN;
19
20 INSERT INTO books VALUES (1001, 'Java', 1, '从入门到放弃');
21
22 INSERT INTO books VALUES (1002, 'MySQL', 10, '从删库到炮路');
23
24 INSERT INTO books VALUES (1003, 'Linux', 5, '从进门到进牢');
2.基本环境搭建
新建—Maven项目！ssmbuild,添加web的支持
导入相关的pom依赖
1 <!--依赖：junit,数据库驱动，连接池，servlet,jsp,mybatis,mybatis-spring,spring-->
2 <dependencies>
3 <!--Junit-->
4 <dependency>
5 <groupId>junit</groupId>
6 <artifactId>junit</artifactId>
7 <version>4.12</version>
8 </dependency>
9 <!--数据库驱动-->
10 <!-- mysql驱动 -->
11 <dependency>
12 <groupId>mysql</groupId>
13 <artifactId>mysql-connector-java</artifactId>
14 <version>8.0.26</version>
15 </dependency>
16 <!-- 数据库连接池 c3p0-->
17 <dependency>
18 <groupId>com.mchange</groupId>
19 <artifactId>c3p0</artifactId>
20 <version>0.9.5.2</version>
21 </dependency>
22
23 <!--Servlet - JSP -->
24 <dependency>
25 <groupId>javax.servlet</groupId>
26 <artifactId>servlet-api</artifactId>
27 <version>2.5</version>
28 </dependency>
29 <dependency>
30 <groupId>javax.servlet.jsp</groupId>
31 <artifactId>jsp-api</artifactId>
32 <version>2.2</version>
33 </dependency>
34 <dependency>
35 <groupId>javax.servlet</groupId>
36 <artifactId>jstl</artifactId>
37 <version>1.2</version>
38 </dependency>
39
40 <!--mybatis-->
41 <dependency>
42 <groupId>org.mybatis</groupId>
43 <artifactId>mybatis</artifactId>
44 <version>3.5.2</version>
45 </dependency>
46 <dependency>
47 <groupId>org.mybatis</groupId>
48 <artifactId>mybatis-spring</artifactId>
49 <version>2.0.2</version>
50 </dependency>
51
52 <!--Spring-->
53 <dependency>
54 <groupId>org.springframework</groupId>
55 <artifactId>spring-webmvc</artifactId>
56 <version>5.1.9.RELEASE</version>
57 </dependency>
58 <dependency>
59 <groupId>org.springframework</groupId>
60 <artifactId>spring-jdbc</artifactId>
61 <version>5.1.9.RELEASE</version>
62 </dependency>
63 </dependencies>
64 Maven资源过滤设置
65
66 <!--静态资源导出-->
67 <build>
68 <!--资源插件：处理src/main/java目录中的xml-->
69 <resources>
70 <resource>
71 <directory>src/main/java</directory><!--所在的目录-->
72 <includes><!--包括目录下的.properties,.xml 文件都会扫描到-->
73 <include>**/*.properties</include>
74 <include>**/*.xml</include>
75 </includes>
76 <filtering>false</filtering>
77 </resource>
78 <resource>
79 <directory>src/main/resources</directory><!--所在的目录-->
80 <includes><!--包括目录下的.properties,.xml 文件都会扫描到-->
81 <include>**/*.properties</include>
82 <include>**/*.xml</include>
83 </includes>
84 <filtering>false</filtering>
85 </resource>
86 </resources>
87 </build>
建立基本结构和配置框架！
com.kuang.pojo
com.kuang.dao
com.kuang.service
com.kuang.controller
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>
</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
http://www.springframework.org/schema/beans/spring-beans.xsd">
</beans>
3.Mybatis层编写
1、数据课配置文件
database.properties
jdbc.dirver=com.mysql.jdbc.Driver
# 如果使用的是MySQL8.0以上的，增加一个时区的配置；&serverTimezone=Asia/Shanghai
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useUnicode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=123456
2、IDEA关联数据库
3、编写MyBatis的核心配置文件
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>
<!--配置数据源，交给Spring去做-->
<!--别名-->
<typeAliases>
<package name="com.kuang.pojo"/>
</typeAliases>
<mappers>
<mapper class="com.kuang.dao.BookMapper" />
</mappers>
</configuration>
4、编写数据库对应的实体类 com.kuang.pojo.Books
使用lombok插件
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
private int bookID;
private String bookName;
private String bookCounts;
private String detail;
}
5、编写Dao层的Mapper接口
package com.kuang.dao;
import com.kuang.pojo.Books;
import org.apache.ibatis.annotations.Param;
import java.util.List;
/**
* Data time:2021/10/15 10:13
* StudentID:2019112118
* Author:hgw
* Description:
*/
public interface BookMapper {
//增加一本书
int addBoos(Books book);
//删除一本书
int deleteBookByID(@Param("bookId") int id);
//更新一本书
int updateBook(Books book);
//查询一本书
Books quertBookById(@Param("booId") int id);
//查询全部书
List<Books> queryAllBook();
//查询一本书(书名)
Books queryBookByName(@Param("bookName") String bookName);
}
6、编写接口对应的Mapper.xml文件。需要导入MyBatis的包：
<?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.kuang.dao.BookMapper">
<insert id="addBoos" parameterType="Books" >
INSERT INTO books (bookName, bookCounts, detail)
VALUES (#{bookName},#{bookCounts},#{detail});
</insert>
<delete id="deleteBookByID" parameterType="int" >
delete from books where bookID = #{bookId}
</delete>
<update id="updateBook" parameterType="Books" >
update books
set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}
where bookID=#{bookID}
</update>
<select id="quertBookById" resultType="Books" >
select * from books
where bookID = #{booId}
</select>
<select id="queryAllBook" resultType="Books" >
select *
from books;
</select>
<select id="queryBookByName" resultType="Books">
select *
from books
where bookName = #{bookName}
</select>
</mapper>
7、编写Service层的接口和实现类
接口：
package com.kuang.service;
import com.kuang.pojo.Books;
import java.util.List;
/**
* Data time:2021/10/15 10:47
* StudentID:2019112118
* Author:hgw
* Description:
*/
public interface BookService {
//增加一本书
int addBoos(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 quertBookById(int id);
//查询全部书
List<Books> queryAllBook();
}
实现类：
package com.kuang.service;
import com.kuang.dao.BookMapper;
import com.kuang.pojo.Books;
import java.util.List;
/**
* Data time:2021/10/15 10:49
* StudentID:2019112118
* Author:hgw
* Description:
*/
public class BookServiceImpl implements BookService {
//service 调用 dao层： 组合Dao
private BookMapper bookMapper;
public void setBookMapper(BookMapper bookMapper) {
this.bookMapper = bookMapper;
}
public int addBoos(Books books) {
return bookMapper.addBoos(books);
}
public int deleteBookByID(int id) {
return bookMapper.deleteBookByID(id);
}
public int updateBook(Books books) {
return bookMapper.updateBook(books);
}
public Books quertBookById(int id) {
return bookMapper.quertBookById(id);
}
public List<Books> queryAllBook() {
return bookMapper.queryAllBook();
}
}
OK，到此，底层需求操作编写完毕！
Spring层
1.Spring整合MyBatis
配置Spring整合MyBatis，我们这里数据源使用c3p0连接池；
我们去编写Spring整合MyBatis的相关配置文件；
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.链接池
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" >
<!-- 配置连接池属性 -->
<property name="driverClass" value="${jdbc.dirver}" />
<property name="jdbcUrl" value="${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i文件-->
<property name="configLocation" value="classpath:mybatis-config.xml" />
</bean>
<!--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.kuang.dao" />
</bean>
</beans>
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:conetxt="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--> <conetxt:component-scan base-package="com.kuang.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.kuang.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> </beans>
Spring层搞定！再次理解一下，Spring就是一个大杂烩，一个容器！
SpringMVC层
1、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"> <!--DispatchServlet--> <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> <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> <!--Session--> <session-config> <session-timeout>15</session-timeout> </session-config> </web-app>
2、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 http://www.springframework.org/schema/mvc/spring-cache.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.kuang.controller" /> <!--4.视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" > <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> </beans>
3、Srping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 http://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！
Controller 和 视图层编写
1.BookController类编写，增删改查
package com.kuang.controller;
import com.kuang.pojo.Books;
import com.kuang.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.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import java.awt.print.Book;
import java.util.ArrayList;
import java.util.List;
/**
* Data time:2021/10/15 15:37
* StudentID:2019112118
* Author:hgw
* Description:
*/
@Controller
@RequestMapping("/book")
public class BookController {
//controller 调用 service层
@Autowired
@Qualifier("BookServiceImpl")
private BookService bookService;
//查询全部的书籍，并且返回到一个书籍展示页面
@RequestMapping("/allBook")
public String list(Model model) {
List<Books> list = bookService.queryAllBook();
model.addAttribute("list", list);
return "allBook";
}
//跳转到增加书籍页面
@RequestMapping("/toAddBook")
public String toAddPage() {
return "addBook";
}
//添加书籍的请求
@RequestMapping("/addBook")
public String addBook(Books books) {
System.out.println("addBook=>" + books );
bookService.addBoos(books);
return "redirect:/book/allBook"; //重定向到我们的@RequestMapping("/allbook")请求；
}
//跳转到修改页面
@RequestMapping("/toUpdate")
public String toUpdatePaper(int id,Model model) {
Books books = bookService.quertBookById(id);
model.addAttribute("QBook", books);
return "updateBook";
}
//修改书籍
@RequestMapping("/updateBook")
public String updateBook(Books books) {
System.out.println("updateBook=>" + books );
int i = bookService.updateBook(books);
if (i>0) {
System.out.println("添加成功" + books);
}
List<Books> list = bookService.queryAllBook();
list.forEach(li-> System.out.println(li));
return "redirect:/book/allBook"; //重定向到我们的@RequestMapping("/allbook")请求；
}
//删除书籍
@RequestMapping("/deleteBook/{bookId}")
public String deleteBook(@PathVariable("bookId") int id){
bookService.deleteBookByID(id);
return "redirect:/book/allBook"; //重定向到我们的@RequestMapping("/allbook")请求；
}
//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";
}
}
2.前端页面编写
index.jsp
<%@ 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="${pageContext.request.contextPath}/book/allBook" >进入书籍页面</a>
</h3>
</body>
</html>
allBook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>书籍展示页面</title>
<%--BootStrap美化界面--%>
<link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column" >
<div class="page-header">
<h1>
<small>书籍列表 —— 显示所有书籍</small>
</h1>
</div>
</div>
<div class="row" >
<div class="col-md-4 column">
<%--toAddBook--%>
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a>
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allBook">显示全部书籍</a>
</div>
<div class="col-md-4 column"></div>
<div class="col-md-4 column">
<%--查询书籍--%>
<form class="form-inline" action="${pageContext.request.contextPath}/book/queryBook" method="post" style="float: right">
<span style="color: red;font-weight: bold">${error}</span>
<input type="text" name="queryBookName" class="form-control" placeholder="请输入要查询的书籍名称">
<input type="submit" value="查询" class="btn btn-primary">
</form>
</div>
</div>
</div>
</div>
<div class="row clearfix">
<div class="col-md-12 column" >
<table class="table table-hover table-striped" >
<thead>
<tr>
<th>书籍编号</th>
<th>书籍名称</th>
<th>书籍数量</th>
<th>书籍详情</th>
</tr>
</thead>
<%--书籍从数据库查询出来，从这个list中遍历出来：foreach--%>
<tbody>
<c:forEach var="book" items="${list}">
<tr>
<td>${book.bookID}</td>
<td>${book.bookName}</td>
<td>${book.bookCounts}</td>
<td>${book.detail}</td>
<td>
<a href="${pageContext.request.contextPath}/book/toUpdate?id=${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>
</body>
</html>
addBook.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>增加书籍</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>
<small>新增书籍</small>
</h1>
</div>
</div>
</div>
<form action="${pageContext.request.contextPath}/book/addBook" method="post">
<div class="form-group">
<label>书籍名称：</label>
<input type="text" name="bookName" class="form-control" required>
</div>
<div class="form-group">
<label >书籍数量：</label>
<input type="text" name="bookCounts" class="form-control" required>
</div>
<div class="form-group">
<label>书籍描述：</label>
<input type="text" name="detail" class="form-control" required>
</div>
<div class="form-group">
<input type="submit" class="form-control" value="添加" required>
</div>
</form>
</div>
</body>
</html>
updateBook.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>修改书籍</title>
<%--BootStrap美化界面--%>
<link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column" >
<div class="page-header">
<h1>
<small>修改书籍</small>
</h1>
</div>
</div>
</div>
<form action="${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="${QBook.bookID}">
<div class="form-group">
<label>书籍名称：</label>
<input type="text" name="bookName" class="form-control" value="${QBook.bookName}" required>
</div>
<div class="form-group">
<label >书籍数量：</label>
<input type="text" name="bookCounts" class="form-control" value="${QBook.bookCounts}" required>
</div>
<div class="form-group">
<label>书籍描述：</label>
<input type="text" name="detail" class="form-control" value="${QBook.detail}" required>
</div>
<div class="form-group">
<input type="submit" class="form-control" value="修改" required>
</div>
</form>
</div>
</body>
</html>
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