快速上手SSM(Spring,SpringMVC,Mybatis)框架整合项目
环境要求：
- IDEA
- MySQL 8.0.25
- 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 ssmbooks;
USE ssmbooks;
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)
);
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');
基本环境搭建：
1、新建一Maven项目！ssmbooks ， 添加web的支持
2、导入相关的pom依赖！
<!--依赖：junit，数据库驱动，连接池，servlet，jsp，mybatis，mybatis-spring，spring，-->
<dependencies>
<!--Junit-->
<dependency>
<groupid>junit</groupid>
<artifactid>junit</artifactid>
<version>4.12</version>
</dependency>
<!--数据库驱动-->
<dependency>
<groupid>mysql</groupid>
<artifactid>mysql-connector-java</artifactid>
<version>8.0.25</version>
</dependency>
<!-- 数据库连接池 -->
<dependency>
<groupid>com.mchange</groupid>
<artifactid>c3p0</artifactid>
<version>0.9.5.2</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-->
<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>
<!--Spring-->
<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>1.18.2</version>
<scope>compile</scope>
</dependency>
</dependencies>
3、Maven资源过滤设置
<!--静态资源导出问题-->
<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>
4、建立基本结构和配置框架！
- com.bai.pojo
- com.bai.dao
- com.bai.service
- com.bai.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>
Mybatis层编写
1、数据库配置文件 database.properties
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmbooks?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=root
2、IDEA关联数据库
3、编写MyBatis的核心配置文件
<!-- 配置数据源 交给spring去做-->
<!-- 别名-->
<typealiases>
<package name="com.bai.pojo">
</package></typealiases>
<!-- 注册BookMapper.xml-->
<mappers>
<mapper class="com.bai.dao.BookMapper"></mapper>
</mappers>
4、编写数据库对应的实体类 com.bai.pojo.Books
使用lombok插件！
package com.bai.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Dao层的 Mapper接口！
package com.bai.dao;
import com.bai.pojo.Books;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface BookMapper {
// 添加一本书
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();
// 通过名字查询书籍
List<books> queryBookByName(@Param("BookName") String BookName);
}
</books></books>
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 Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.bai.dao.BookMapper">
<!-- 添加一本书-->
<insert id="addBook" parametertype="com.bai.pojo.Books">
insert into ssmbooks.books ( bookName, bookCounts, detail)
values (#{bookName},#{bookCounts},#{detail})
</insert>
<!-- 删除一本书-->
<delete id="deleteBookById" parametertype="int">
delete from ssmbooks.books where bookID = #{bookId}
</delete>
<!-- 更新一本书-->
<update id="updateBook" parametertype="com.bai.pojo.Books">
update ssmbooks.books set bookName=#{bookName},bookCounts=#{bookCounts},detail=#{detail}
where bookID=#{bookID}
</update>
<!-- 通过id查询书籍-->
<select id="queryBookById" resulttype="com.bai.pojo.Books">
select * from ssmbooks.books where bookID=#{bookId}
</select>
<!-- 查询全部的书-->
<select id="queryAllBook" resulttype="com.bai.pojo.Books">
select * from ssmbooks.books
</select>
<!-- 通过名字查询书籍-->
<select id="queryBookByName" resulttype="com.bai.pojo.Books">
select * from ssmbooks.books where bookName like concat('%',#{BookName},'%')
</select>
</mapper>
7、编写Service层的接口和实现类
接口：
package com.bai.service;
import com.bai.pojo.Books;
import java.util.List;
public interface BookService {
// 添加一本书
int addBook(Books books);
// 删除一本书
int deleteBookById(int id);
// 更新一本书
int updateBook(Books books);
// 查询一本书通过id
Books queryBookById(int id);
// 查询全部的书
List<books> queryAllBook();
// 查询一本书通过名字
List<books> queryBookByName(String BookName);
}
</books></books>
实现类：
package com.bai.service;
import com.bai.dao.BookMapper;
import com.bai.pojo.Books;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import java.util.List;
@Service("BookServiceImpl")
public class BookServiceImpl implements BookService{
//service层调dao层： 组合dao
@Autowired
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();
}
public List<books> queryBookByName(String BookName) {
return bookMapper.queryBookByName(BookName);
}
}
</books></books>
OK，到此，底层需求操作编写完毕！
Spring层
1、配置Spring整合MyBatis，我们这里数据源使用c3p0连接池；
2、我们去编写Spring整合Mybatis的相关的配置文件；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">
<!-- 配置整合mybatis -->
<!-- 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，并且可以自动设置到对象中！）-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!-- 配置连接池属性 -->
<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">
</property></property></property></property></property></property></property></property></property></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">
</property></property></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">
<!-- 1.注入 sqlSessionFactory-->
<!-- 继承就使用： sqlSessionFactoryBeanName 私有化就使用：sqlSessionTemplateBeanName-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory">
<!-- 2.扫描dao包-->
<property name="basePackage" value="com.bai.dao">
</property></property></bean>
</context:property-placeholder></beans>
3、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">
<!-- 1.扫描service下的包-->
<context:component-scan base-package="com.bai.service">
<!-- 2.将我们所有的业务类，注入到spring中，可以通过配置，或注解实现自动装配-->
<!-- <bean id="BookServiceImpl" class="com.bai.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">
</property></bean>
<!-- 4.aop事务支持-->
</context:component-scan></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！
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">
<!--DispatcherServlet-->
<servlet>
<servlet-name>DispatcherServlet</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>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--乱码配置：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过期时间-->
<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: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
https://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
https://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.扫描包：controller-->
<context:component-scan base-package="com.bai.controller">
<!-- 4.配置jsp 显示ViewResolver视图解析器-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView">
<property name="prefix" value="/WEB-INF/jsp/">
<property name="suffix" value=".jsp">
</property></property></property></bean>
</context:component-scan></mvc:default-servlet-handler></mvc:annotation-driven></beans>
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
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">
</import></import></import></beans>
Controller 和 视图层编写
1、BookController 类编写
package com.bai.controller;
import com.bai.pojo.Books;
import com.bai.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 {
//controller层调service层
@Autowired
@Qualifier("BookServiceImpl")
private BookService bookService;
//查询全部的书籍，并且返回到一个数据展示页面
@RequestMapping("/allbook")
public String list(Model model) {
List<books> list = bookService.queryAllBook();
model.addAttribute("list", list);
return "allbook";
}
// 跳转到添加书籍页面
@RequestMapping("/toAddBook")
public String toAddPaper() {
return "addBook";
}
//添加书籍的请求
@RequestMapping("/addBook")
public String addBook(Books books){
System.out.println("Books=>:"+books);
bookService.addBook(books);
return "redirect:/book/allbook";
}
//跳转到修改书籍页面
@RequestMapping("/toUpdate")
public String toUpdatePaper(int id,Model model){
Books books = bookService.queryBookById(id);
model.addAttribute("QBook", books);
return "updateBook";
}
//修改书籍请求
@RequestMapping("/updateBook")
public String UpdateBook(Books books,Model model) {
System.out.println("UpdateBook=>:"+books);
bookService.updateBook(books);
// 出现的问题：我们提交了修改的SQL请求，但是修改失败。
// 我们看一下sql语句，能否执行成功？ 执行失败：发现sql语句需要传递一个id进行修改
// Books books1 = bookService.queryBookById(books.getBookID());
// model.addAttribute("books1", books1);
return "redirect:/book/allbook";
}
//删除书籍请求
@RequestMapping("/del/{bookid}")
public String DeleteBook(@PathVariable("bookid") int id) {
bookService.deleteBookById(id);
return "redirect:/book/allbook";
}
//通过名字查询书籍请求
@RequestMapping("/queryBook")
public String queryBook(String queryBookName,Model model) {
List<books> list = bookService.queryBookByName(queryBookName);
model.addAttribute("list", list);
if (list.size()==0){
model.addAttribute("msg", "未查到数据");
}
return "allbook";
}
}
</books></books>
2、编写首页 index.jsp
<%@ page contenttype="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>首页</title>
</head>
<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>
<body>
<h3>
<a href="${pageContext.request.contextPath}/book/allbook">进入书籍页面</a>
</h3>
</body>
</html>
</%@>
3、书籍列表页面 allbook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contenttype="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>书籍列表</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- 引入 Bootstrap -->
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>书籍列表 —— 显示所有书籍</small>
</h1>
</div>
</div>
</div>
<div class="row">
<div class="col-md-4 column">
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增书籍</a>
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allbook">显示全部书籍</a>
</div>
<div class="col-md-4 column">
<form class="form-inline" action="${pageContext.request.contextPath}/book/queryBook" method="post" style="float: right">
<span style="color: red;font-weight: bold">${msg}</span>
<input type="text" name="queryBookName" class="form-control" placeholder="请输入要查询的书籍">
<input type="submit" value="查询" class="btn btn-primary">
</form>
</div>
</div>
<div class="row clearfix">
<div class="col-md-12 column">
<table class="table table-hover table-striped">
<thead>
<tr>
<th>书籍编号</th>
<th>书籍名字</th>
<th>书籍数量</th>
<th>书籍详情</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<c:foreach var="book" items="${requestScope.get('list')}">
<tr>
<td>${book.getBookID()}</td>
<td>${book.getBookName()}</td>
<td>${book.getBookCounts()}</td>
<td>${book.getDetail()}</td>
<td>
<a href="${pageContext.request.contextPath}/book/toUpdate?id=${book.getBookID()}">更改</a> | <%-- 老式的传参--%>
<a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除</a> <%-- restful风格传参--%>
</%--></%--></td>
</tr>
</c:foreach>
</tbody>
</table>
</div>
</div>
</div>
</body>
</html>
</%@></%@>
5、添加书籍页面：addBook.jsp
<%@ page contenttype="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>新增书籍</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- 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>新增书籍</small>
</h1>
</div>
</div>
</div>
<form action="${pageContext.request.contextPath}/book/addBook" method="post">
书籍名称：<input type="text" name="bookName"><br><br>
书籍数量：<input type="text" name="bookCounts"><br><br>
书籍详情：<input type="text" name="detail"><br><br>
<input type="submit" value="添加">
</form>
</div>
</body>
</html>
</%@>
7、修改书籍页面 updateBook.jsp
<%@ page contenttype="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<<title>修改信息</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<!-- 引入 Bootstrap -->
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>修改信息</small>
</h1>
</div>
</div>
</div>
<form action="${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。 我们看一下sql语句，能否执行成功？ 执行失败：发现sql语句需要传递一个id进行修改--%>
<%-- 前端传参隐藏域--%>
<input type="hidden" name="bookID" value="${QBook.getBookID()}">
书籍名称：<input type="text" name="bookName" value="${QBook.getBookName()}">
书籍数量：<input type="text" name="bookCounts" value="${QBook.getBookCounts()}">
书籍详情：<input type="text" name="detail" value="${QBook.getDetail() }">
<input type="submit" value="提交">
</%--></%--出现的问题：我们提交了修改的sql请求，但是修改失败。></form>
</div>
</body>
</html>
</%@>
配置Tomcat，进行运行！
项目结构
这里我们只是使用了SSM框架完成了基本的增删改查功能模块的网页
Original: https://www.cnblogs.com/b10100912/p/16684185.html
Author: 面向CV工程师
Title: SSM(Spring,SpringMVC,Mybatis)框架整合项目
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