SpringMVC 整合SSM开发
9、整合SSM
环境要求
环境：
- IDEA
- MySQL 5.7.19
- Tomcat 9
- Maven 3.6
数据库环境
创建一个存放书籍数据的数据库表
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');
1.pom.xml导入依赖
顺便处理Maven资源过滤问题
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>com.kuanggroupId>
<artifactId>ssmbuildartifactId>
<version>1.0-SNAPSHOTversion>
<dependencies>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.12version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>5.1.47version>
dependency>
<dependency>
<groupId>com.mchangegroupId>
<artifactId>c3p0artifactId>
<version>0.9.5.4version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>servlet-apiartifactId>
<version>2.5version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>3.5.7version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>2.0.6version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>5.3.8version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>5.3.8version>
dependency>
<dependency>
<groupId>org.aspectjgroupId>
<artifactId>aspectjweaverartifactId>
<version>1.9.7version>
dependency>
<dependency>
<groupId>org.projectlombokgroupId>
<artifactId>lombokartifactId>
<version>1.18.10version>
dependency>
dependencies>
<build>
<resources>
<resource>
<directory>src/main/javadirectory>
<includes>
<include>**/*.propertiesinclude>
<include>**/*.xmlinclude>
includes>
<filtering>falsefiltering>
resource>
<resource>
<directory>src/main/resourcesdirectory>
<includes>
<include>**/*.propertiesinclude>
<include>**/*.xmlinclude>
includes>
<filtering>falsefiltering>
resource>
resources>
build>
project>
2、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
DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
configuration>
- applicationContext.xml
<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
1、数据库配置文件 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=123456
2、IDEA关联数据库
3、编写MyBatis的核心配置文件
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>
<package name="com.kuang.pojo"/>
typeAliases>
<mappers>
<mapper class="com.kuang.dao.BookMapper"/>
mappers>
configuration>
4、编写与数据库字段对应的实体类 com.kuang.pojo.Books
(使用了lombok插件！)
package com.kuang.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;
}
5、编写Mapper接口
package com.kuang.dao;
import com.kuang.pojo.Books;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface BookMapper {
//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();
}
6、编写接口对应的Mapper.xml文件
DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.kuang.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>
7、编写Service层的接口和实现类(service层中：接口直接同dao层，再增加接口的实现类，重写的方法中调用dao层中的方法)
- 接口：
package com.kuang.service;
import com.kuang.pojo.Books;
import org.apache.ibatis.annotations.Param;
import java.util.List;
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：
package com.kuang.service;
import com.kuang.dao.BookMapper;
import com.kuang.pojo.Books;
import java.util.List;
public class BookServiceImpl implements BookService{
//service调dao层：组合Dao，设置set方法，方便spring管理
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();
}
}
底层需求到此编写完毕！！
4、Spring层编写
1、配置Spring整合MyBatis，我们这里数据源使用c3p0连接池；
2、编写Spring整合Mybatis的相关的配置文件；spring-dao.xml
<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">
<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.kuang.dao"/>
bean>
3、Spring整合service层
<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"
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">
<context:component-scan base-package="com.kuang.service"/>
<bean id="BookServiceImpl" class="com.kuang.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层也搞定了！再次理解一下，Spring就是一个大杂烩，一个容器！对吧！
5、SpringMVC层编写
1、web.xml
<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">
<servlet>
<servlet-name>springmvcservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring-mvc.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>springmvcservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
<filter>
<filter-name>encdingFilterfilter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>utf-8param-value>
init-param>
filter>
<filter-mapping>
<filter-name>encdingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<session-config>
<session-timeout>15session-timeout>
session-config>
web-app>
2、spring-mvc.xml
<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
https://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.kuang.controller"/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
bean>
beans>
3、Spring配置整合文件，applicationContext.xml
<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>
配置文件到这里暂时结束！已经略微感受到配置地域？！
接下来是Controller 和 视图层的编写
6、Controller和视图层
Controller层再去调用service层，处理数据并处理转发重定向。
1、BookController 类编写， 方法1：查询全部书籍
@Controller
@RequestMapping("/book")
public class BookController {
//controller 调 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";
}
}
2、编写首页index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
首页
进入书籍页面
3、书籍列表页面 allbook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
书籍展示
4、BookController类编写，方法2：添加书籍
@RequestMapping("/toAddBook")
public String toAddPaper() {
return "addBook";
}
@RequestMapping("/addBook")
public String addPaper(Books books) {
System.out.println(books);
bookService.addBook(books);
return "redirect:/book/allBook";
}
5、添加书籍页面：addBook.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Titletitle>
<%--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>
<form action="${pageContext.request.contextPath}/book/addBook" method="post">
<div class="form-group">
<label>书籍名称:label>
<input type="text" name="bookName" class="form-control" required>
div>
<div class="form-group">
<label>书籍数量:label>
<input type="text" name="bookCounts" class="form-control" required>
div>
<div class="form-group">
<label>书籍描述:label>
<input type="text" name="detail" class="form-control" required>
div>
<div class="form-group">
<input type="submit" class="form-control" value="添加">
div>
form>
div>
div>
body>
html>
6、BookController 类编写 ， 方法3：修改书籍
//跳转到修改页面
@RequestMapping("/toUpdate")
public String toUpdatepaper(int id,Model model){
Books books = bookService.queryBookById(id);
model.addAttribute("QBook",books);
return "updateBook";
}
//修改书籍
@RequestMapping("/updateBook")
public String updateBook(Books books){
System.out.println("updateBook=>"+books);
bookService.updateBook(books);
return "redirect:/book/allBook";
}
7、修改书籍的页面updateBook.jsp 可以复用添加书籍的页面
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>修改书籍title>
<%--BootStrap美化界面--%>
<link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>修改书籍small>
h1>
div>
div>
<form action="${pageContext.request.contextPath}/book/updateBook" method="post">
<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">
div>
form>
div>
div>
body>
html>
8、BookController 类编写，方法4：删除书籍（用了）
//删除书籍
@RequestMapping("/deleteBook/{bookId}")
public String deleteBook(@PathVariable("bookId") int id){
bookService.deleteBookById(id);
return "redirect:/book/allBook";
}
7、现在从头到尾重新增加一个业务！（搜索功能！）
思路捋一下，新增业务应该从底层编写到高层，然后检查代码应该从高层到底层
新业务：根据书名去搜索图书！新搜索出的图书就显示在allBook.jsp中！如果搜索的是空值，会直接返回/book/queryBook并显示全部书籍！在页面上新增一个显示全部书籍的按钮！
1.BookMapper中添加方法定义
Books queryBookByName(@Param("bookName") String bookName);
2.编写BookMapper.xml
<select id="queryBookByName" resultType="Books">
select * from ssmbuild.books where bookName = #{bookName}
select>
3.同样在BookService中增加方法定义
Books queryBookByName(@Param("bookName") String bookName);
4.BookServiceImpl中调用dao
public Books queryBookByName(String bookName) {
return bookMapper.queryBookByName(bookName);
}
5、Controller层的编写
//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";
}
6、前端增加搜索栏 ，这里直接呈上最终形态
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
书籍展示
<%--BootStrap美化界面--%>
新增业务完成！从头到尾就做了这些事情！ 体会到了框架开发的简单
后面学了Ajax好像会更轻松的实现某些功能
到目前为止，这个SSM项目整合已经完全的OK了，可以直接运行进行测试！这个练习十分的重要，大家需要保证，不看任何东西，自己也可以完整的实现出来！
烂熟于心！
最后看一下项目结构图
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！
Ajax 和 Json
文件上传和下载
拦截器
前路漫漫，认真坚持最重要！
end