Java(SpringMVC03)(SSM整合)
参考视频:17. ssm整合:Mybatis层(狂神)
10. SSM整合
10.1 环境要求
- 环境:
- IDEA(我的是2021.2)
- MySQL 5.7.19(我的是5.7.38)
- Tomcat 9(我的是9.0.63)
- Maven 3.6(我的是3.6.1)
- 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。
10.2 数据库环境
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,'从入门到入土'),
(2,'MySQL',2,'从删库到跑路'),
(3,'Linux',3,'从进门到坐牢'),
(4,'白夜行',4,'东野圭吾'),
(5,'走到人生边上',5,'杨绛'),
(6,'黄金时代',6,'王小波'),
(7,'百年孤独',7,'加西亚·马尔克斯'),
(8,'百年孤独(盗版)',8,'盗版侠·马尔克斯'),
(9,'黄金时代',9,'王大波'),
(10,'黑夜行',10,'西野圭吾'),
(11,'程序员的自我修养',11,'小黄鸭调试法——典韦'),
(12,'孤独是人生的必修课',12,'卢思浩');
10.3 基本环境搭建
- 新建一Maven项目!ssmbuild , 添加web的支持
- 导入相关的pom依赖!
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.2</version>
</dependency>
<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>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>
<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>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.24</version>
</dependency>
</dependencies>
- Maven资源过滤设置
<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>
- 建立基本结构和配置框架!
- com.zach.pojo
- com.zach.dao
- com.zach.service
- com.zach.controller
?
<?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>
<?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>
10.4 Mybatis层
- 数据库配置文件 database.properties
jdbc.driver=com.mysql.jdbc.Driver
# 如果使用的是MySQL8.0+ 需要增加一个时区的配置 &serverTimezone=Asia/shanghai
jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123456
-
IDEA关联数据库 -
编写MyBatis的核心配置文件
<?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>
<settings>
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
<typeAliases>
<typeAlias type="com.zach.pojo.Books" alias="Books"/>
</typeAliases>
<mappers>
<mapper class="com.zach.dao.BookMapper"/>
</mappers>
</configuration>
- 编写数据库对应的实体类 com.kuang.pojo.Books
package com.zach.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
private int bookID;
private String bookName;
private int bookCounts;
private String detail;
}
- 编写Dao层的 Mapper接口!
package com.zach.dao;
import com.zach.pojo.Books;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface BookMapper {
int addBook(Books books);
int deleteBookById(@Param("bookId") int id);
int updateBook(Books books);
Books queryBookById(@Param("bookId") int id);
List<Books> queryAllBook();
List<Books> queryBookByName(@Param("bookName") String bookName);
int countBook();
}
- 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 Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.zach.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>
<select id="queryBookByName" resultType="Books">
select *
from ssmbuild.books
where bookName like concat('%',#{bookName},'%');
</select>
<select id="countBook" resultType="int">
select count(bookID)
from ssmbuild.books;
</select>
</mapper>
- 编写Service层的接口和实现类
package com.zach.service;
import com.zach.pojo.Books;
import java.util.List;
public interface BookService {
int addBook(Books books);
int deleteBookById(int id);
int updateBook(Books books);
Books queryBookById(int id);
List<Books> queryAllBook();
List<Books> queryBookByName(String bookName);
int countBook();
}
package com.zach.service;
import com.zach.dao.BookMapper;
import com.zach.pojo.Books;
import java.util.List;
public class BookServiceImpl implements BookService{
private BookMapper bookMapper;
public void setBookMapper(BookMapper bookMapper) {
this.bookMapper = bookMapper;
}
@Override
public int addBook(Books books) {
return bookMapper.addBook(books);
}
@Override
public int deleteBookById(int id) {
return bookMapper.deleteBookById(id);
}
@Override
public int updateBook(Books books) {
return bookMapper.updateBook(books);
}
@Override
public Books queryBookById(int id) {
return bookMapper.queryBookById(id);
}
@Override
public List<Books> queryAllBook() {
return bookMapper.queryAllBook();
}
@Override
public List<Books> queryBookByName(String bookName) {
return bookMapper.queryBookByName(bookName);
}
@Override
public int countBook() {
return bookMapper.countBook();
}
}
10.5 Spring层
-
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的相关的配置文件。
<?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:property-placeholder location="classpath:database.properties"/>
<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}"/>
<property name="maxPoolSize" value="30"/>
<property name="minPoolSize" value="10"/>
<property name="autoCommitOnClose" value="false"/>
<property name="checkoutTimeout" value="10000"/>
<property name="acquireRetryAttempts" value="2"/>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<property name="basePackage" value="com.zach.dao"/>
</bean>
</beans>
- Spring整合service层
<?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.zach.service" />
<bean id="BookServiceImpl" class="com.zach.service.BookServiceImpl">
<property name="bookMapper" ref="bookMapper"/>
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<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!对吧!
10.6 SpringMVC层
- 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">
<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>
<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>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>15</session-timeout>
</session-config>
</web-app>
- 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">
<mvc:annotation-driven/>
<mvc:default-servlet-handler/>
<context:component-scan base-package="com.zach.controller"/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
- Spring配置整合文件,
<?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!
- 可能出现问题:
- useSSL=true,改成false
- sql语句没写完整或写错
return "/allBook"; 少写/。或者其实应该在视图解析器里加个/才对。
10.7 Controller层 和 视图层 编写
- BookController 类编写 , 方法一:查询全部书籍
package com.zach.controller;
import com.zach.pojo.Books;
import com.zach.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.util.List;
@Controller
@RequestMapping("/book")
public class BookController {
@Autowired
@Qualifier("BookServiceImpl")
private BookService bookService;
@RequestMapping("/allBookPage")
public String list(Model model){
List<Books> list = bookService.queryAllBook();
model.addAttribute("list",list);
return "allBookPage";
}
}
- 编写首页 index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE HTML>
<html>
<head>
<title>首页</title>
<style type="text/css">
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: 4px;
}
</style>
</head>
<body>
<h3>
<a href="${pageContext.request.contextPath}/book/allBookPage">点击进入旧华书店</a>
</h3>
</body>
</html>
- 问题: 如果路径不能
/ 出来(不能自动生成,也不能点进去跳转),可能是以下原因: - 乱按了某些设置导致该页面红框内显示的“层次不对”。改成这样就行了。(实在不会,就重新建立工程,复制配置文件的时候注意一下就行)
- 书籍列表页面
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>欢迎进入旧华书店</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1><small>书籍列表</small></h1>
</div>
</div>
</div>
<div class="row">
<div class="col-md-2">
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/addBookPage">添加书籍</a>
</div>
<div class="col-md-2">
<a href="${pageContext.request.contextPath}/book/allBookPage" class="btn btn-primary">查看全部书籍</a>
</div>
<div class="col-md-4 column col-md-offset-4">
<%--查询书籍--%>
<form class="form-inline" action="${pageContext.request.contextPath}/book/queryBookByName" method="post">
<span style="color: red;font-weight: bold">${error}</span>
<input type="text" name="queryBookName" class="form-control" placeholder="请输入要查询的书籍名称">
<input type="submit" value="查询" class="btn btn-primary">
</form>
</div>
</div>
<div class="row clearfix">
<div class="col-md-12 column">
<table class="table table-hover table-striped">
<thead>
<tr>
<th>书籍编号</th>
<th>书籍名字</th>
<th>书籍数量</th>
<th>书籍详情</th>
<th>相关操作</th>
</tr>
</thead>
<tbody>
<c:forEach var="book" items="${list}">
<tr>
<td>${book.bookID}</td>
<td>${book.bookName}</td>
<td>${book.bookCounts}</td>
<td>${book.detail}</td>
<td>
<a href="${pageContext.request.contextPath}/book/updateBookPage?id=${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>
</div>
</body>
- BookController 类编写,方法二:添加书籍
@RequestMapping("/addBookPage")
public String addBookPage(){
return "addBookPage";
}
@RequestMapping("/addBook")
public String addBook(Books books){
bookService.addBook(books);
return "redirect:/book/allBookPage";
}
- 添加书籍页面
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>添加书籍</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<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>添加书籍</small>
</h1>
</div>
</div>
</div>
<form action="${pageContext.request.contextPath}/book/addBook" method="post">
<div class="form-group">
书籍名称:<input type="text" name="bookName" required>
</div>
<div class="form-group">
书籍数量:<input type="text" name="bookCounts" required>
</div>
<div class="form-group">
书籍详情:<input type="text" name="detail" required>
</div>
<div class="form-group">
<input type="submit" value="添加">
</div>
</form>
</div>
</body>
- BookController 类编写 , 方法三:修改书籍
@RequestMapping("/updateBookPage")
public String updateBookPage(Model model, int id){
Books books = bookService.queryBookById(id);
System.out.println(books);
model.addAttribute("bookInfo",books);
return "updateBookPage";
}
@RequestMapping("/updateBook")
public String updateBook(Model model,Books book){
bookService.updateBook(book);
Books books = bookService.queryBookById(book.getBookID());
model.addAttribute("bookInfo", books);
return "redirect:/book/allBookPage";
}
- 修改书籍页面
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>修改书籍信息</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>修改书籍信息</small>
</h1>
</div>
</div>
</div>
<form action="${pageContext.request.contextPath}/book/updateBook" method="post">
<div class="form-group">
书籍编号:${bookInfo.bookID}
<input type="hidden" name="bookID" value="${bookInfo.bookID}" readonly="readonly"/>
</div>
<div class="form-group">
书籍名称:<input type="text" name="bookName" value="${bookInfo.bookName}" required/>
</div>
<div class="form-group">
书籍数量:<input type="text" name="bookCounts" value="${bookInfo.bookCounts}" required/>
</div>
<div class="form-group">
书籍详情:<input type="text" name="detail" value="${bookInfo.detail}" required/>
</div>
<div class="form-group">
<input type="submit" value="提交"/>
</div>
</form>
</div>
</body>
- BookController 类编写 , 方法四:删除书籍
@RequestMapping("/deleteBook/{bookId}")
public String deleteBook(@PathVariable("bookId") int id){
bookService.deleteBookById(id);
return "redirect:/book/allBookPage";
}
- 扩展:根据名字模糊查询书籍
@RequestMapping("/queryBookByName")
public String queryBook(Model model, String queryBookName){
List<Books> list = bookService.queryBookByName(queryBookName);
int count = bookService.countBook();
if (list.size()==0){
list = bookService.queryAllBook();
model.addAttribute("error", "未查到");
}else if (list.size()==count){
list = bookService.queryAllBook();
model.addAttribute("error", "请输入");
}
model.addAttribute("list",list);
return "allBookPage";
}
- 配置Tomcat,测试运行。
- 到目前为止,这个SSM项目整合已经完全OK了,可以直接运行进行测试!这个练习十分地重要,大家需要保证, 不看任何东西 ,自己也可以完整地实现出来!
- 截图展示(部分):
(不全屏) (全屏) (剩下的省略…)
- 项目结构图:
(我的)
(狂神笔记上的和我有些不一样的地方,但是视频里是一样的)
10.8 小结及展望
- 这个是同学们的第一个SSM整合案例,一定要烂熟于心!
- SSM框架的重要程度是不言而喻的,学到这里,大家已经可以进行基本网站的单独开发。但是这只是增删改查的基本操作。可以说学到这里,大家才算是真正的步入了后台开发的门。也就是能找一个后台相关工作的底线。
- 或许很多人,工作就做这些事情,但是对于个人的提高来说,还远远不够!
- 我们后面还要学习一些 SpringMVC 的知识!
- 前路漫漫,认真坚持最重要!
? ?
—————— THE END ——————
?
|