SSM整合
作者：互联网
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` (
`id` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id',
`name` VARCHAR(100) NOT NULL COMMENT '书名',
`count` 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');
基本环境搭建
1、新建一Maven项目！ssmbuild ， 添加web的支持
2、导入相关的pom依赖！
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.19.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.16</version>
</dependency>
<!-- 数据库连接池-->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.5</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.25</version>
</dependency>
<!-- Mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.9</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.7</version>
</dependency>
<!-- Servlet API-->
<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>2.2.1-b03</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
3、Maven资源过滤设置
<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>
4、建立基本结构和配置框架！
-
com.gao.pojo
-
com.gao.mapper
-
com.gao.service
-
com.gao.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
driver=com.mysql.jdbc.Driver
# 如果使用的是MysQL8.0+，增加一个时区的配置;&serverTimezone=Asia/Shanghai
url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8&useJDBCCompliantTimezoneShift=true&serverTimezone=UTC
name=root
password=123456
2、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>
<typeAliases>
<package name="com.gao.pojo"/>
</typeAliases>
<mappers>
<mapper class="com.gao.mapper.BookMapper"/>
</mappers>
</configuration>
3、编写数据库对应的实体类 com.gao.pojo.Books
使用lombok插件！
package com.kuang.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Books {
private int id;
private String name;
private int count;
private String detail;
}
5、编写Dao层的 Mapper接口！
package com.gao.mapper;
import com.gao.pojo.Books;
import java.util.List;
public interface BookMapper {
int addBook(Books books);
int deleteBook(int id);
int updateBook(Books books);
Books queryBook(int id);
List<Books> queryAllBooks();
Books queryBookByName(String name);
}
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.gao.mapper.BookMapper">
<insert id="addBook" parameterType="Books">
insert into books (name,count,detail) values (#{name},#{count},#{detail});
</insert>
<delete id="deleteBook" parameterType="_int">
delete from books where id = #{id}
</delete>
<update id="updateBook" parameterType="Books">
update books set name = #{name},count =#{count},detail=#{detail}
where id = #{id}
</update>
<select id="queryBook" resultType="Books">
select * from books where id = #{id}
</select>
<select id="queryAllBooks" resultType="Books">
select * from books
</select>
<select id="queryBookByName" resultType="Books">
select * from books where name = #{name}
</select>
</mapper>
7、编写Service层的接口和实现类
接口：
package com.gao.service;
import com.gao.pojo.Books;
import java.util.List;
public interface BookService {
int addBook(Books books);
int deleteBook(int id);
int updateBook(Books books);
Books queryBook(int id);
List<Books> queryAllBooks();
Books queryBookByName(String name);
}
实现类：
package com.gao.service;
import com.gao.mapper.BookMapper;
import com.gao.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 deleteBook(int id) {
return bookMapper.deleteBook(id);
}
@Override
public int updateBook(Books books) {
return bookMapper.updateBook(books);
}
@Override
public Books queryBook(int id) {
return bookMapper.queryBook(id);
}
@Override
public List<Books> queryAllBooks() {
return bookMapper.queryAllBooks();
}
@Override
public Books queryBookByName(String name) {
return bookMapper.queryBookByName(name);
}
}
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-mapper.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
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、数据库关联文件-->
<context:property-placeholder location="classpath:db.properties"/>
<!--2、数据库连接池-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${driver}"/>
<property name="jdbcUrl" value="${url}"/>
<property name="user" value="${name}"/>
<property name="password" value="${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" />
<!--获取连接超时时问-->
<property name="checkoutTimeout" value="1080"/>
<!--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"/>
<property name="configLocation" value="classpath:mybatis-config.xml"/>
</bean>
<!--4、配置dao扫描包，动态的实现Mapper接口可以注入到Spring中-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 注入sqlSessionFactory-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
<!-- 要扫描的mapper包-->
<property name="basePackage" value="com.gao.mapper"/>
</bean>
</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
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、扫描service下的包-->
<context:component-scan base-package="com.gao.service"/>
<!-- 2、将我们的所有业务类，注入到Spring中，可以通过配置或者注解实现-->
<bean id="bookServiceImpl" class="com.gao.service.BookServiceImpl">
<property name="bookMapper" ref="bookMapper"/>
</bean>
<!-- 3、声明式事务配置-->
<bean id="transactionManger" 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">
<!-- DispatcherServlet-->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<!--这里一定要注意是加载总的配置文件-->
<param-value>classpath:applicationContext.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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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/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-->
<context:component-scan base-package="com.gao.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、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="spring-mapper.xml"/>
<import resource="spring-service.xml"/>
<import resource="spring-mvc.xml"/>
</beans>
配置文件，暂时结束！Controller 和 视图层编写
1、BookController 类编写 ， 方法一：查询全部书籍
@Controller
@RequestMapping("/book")
public class BookController {
@Autowired
@Qualifier("bookServiceImpl")
private BookService bookService;
@RequestMapping("/allBook")
public String list(Model model){
List<Books> list = bookService.queryAllBooks();
model.addAttribute("list",list);
return "allBook";
}
}
2、编写首页 index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
<style>
a{
text-decoration: none;
color: black;
font-size: 18px;
}
h3{
width: 180px;
height: 38px;
margin: 350px auto;
text-align: center;
line-height: 38px;
background: deepskyblue;
border-radius: 5px;
}
</style>
</head>
<body>
<h3>
<a href="${pageContext.request.contextPath}/book/allBook">进入书籍展示界面</a>
</h3>
</body>
</html>
3、书籍列表页面 allbook.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>书籍展示界面</title>
<link href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row ui-helper-clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>书籍列表————————显示书籍</small>
</h1>
</div>
</div>
</div>
<div class="row">
<div class="col-md-4 column">
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增</a>
<a class="btn btn-primary" href="${pageContext.request.contextPath}/book/allBook">显示全部书籍</a>
</div>
<div class="col-md-4 column"></div>
<div class="col-md-4 column">
<span style="color: red;font-weight: bold">${error}</span>
<form class="form-inline" action="${pageContext.request.contextPath}/book/queryBookByName" method="post" style="float: right">
<input type="text" name="queryName" class="form-control" placeholder="请输入要查询的书籍名称">
<input type="submit" value="查询" class="btn btn-primary">
</form>
</div>
</div>
<div class="row ui-helper-clearfix">
<div class="col-md-12 column">
<table class="table table-hover table-striped">
<thead>
<th>书籍编号</th>
<th>书籍名称</th>
<th>书籍数量</th>
<th>书籍详情</th>
</thead>
<tbody>
<c:forEach var="book" items="${list}">
<tr>
<td>${book.id}</td>
<td>${book.name}</td>
<td>${book.count}</td>
<td>${book.detail}</td>
<td>
<a href="${pageContext.request.contextPath}/book/toUpdate?id=${book.getId()}">修改</a> |
<a href="${pageContext.request.contextPath}/book/deleteBook/${book.getId()}">删除</a>
</td>
</tr>
</c:forEach>
</tbody>
</table>
</div>
</div>
</div>
</body>
</html>
4、BookController 类编写 ， 方法二：添加书籍
@RequestMapping("/toAddBook")
public String toAddBooks(){
return "addBook";
}
@RequestMapping("/addBook")
public String addBook(Books 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>新增书籍</title>
<!-- 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="${pageContext.request.contextPath}/book/addBook" method="post">
书籍名称：<input type="text" class="form-control" name="name" required><br><br><br>
书籍数量：<input type="text" class="form-control" name="count" required><br><br><br>
书籍详情：<input type="text" class="form-control" name="detail" required><br><br><br>
<input type="submit" value="添加">
</form>
</div>
</body>
</html>
6、BookController 类编写 ， 方法三：修改书籍
@RequestMapping("/toUpdate")
public String toUpdateBook(int id,Model model){
Books books = bookService.queryBook(id);
model.addAttribute("QBook",books);
return "updateBook";
}
@RequestMapping("/updateBook")
public String updateBook(Books books){
bookService.updateBook(books);
return "redirect:/book/allBook";
}
7、修改书籍页面 updateBook.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>修改界面</title>
<!-- 引入 Bootstrap -->
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container">
<div class="row clearfix">
<div class="col-md-12 column">
<div class="page-header">
<h1>
<small>修改书籍</small>
</h1>
</div>
</div>
</div>
<form action="${pageContext.request.contextPath}/book/updateBook" method="post">
<input type="hidden" name="id" value="${QBook.id}">
书籍名称：<input type="text" class="form-control" name="name" value="${QBook.name}" required><br><br><br>
书籍数量：<input type="text" class="form-control" name="count" value="${QBook.count}" required><br><br><br>
书籍详情：<input type="text" class="form-control" name="detail" value="${QBook.detail}" required><br><br><br>
<input type="submit" value="修改">
</form>
</div>
</body>
</html>
8、BookController 类编写 ， 方法四：删除书籍
@RequestMapping("/deleteBook/{id}")
public String deleteBook(@PathVariable("id") int id){
bookService.deleteBook(id);
return "redirect:/book/allBook";
}
进行功能拓展：搜索功能
注意，在进行拓展时一定要从底层开始写起（底层代码和jsp代码已经粘贴在了上面）
BookController 类编写
@RequestMapping("/queryBookByName")
public String queryBookByName(String queryName,Model model){
Books books = bookService.queryBookByName(queryName);
List<Books> list = new ArrayList<Books>();
list.add(books);
if (books==null){
list =bookService.queryAllBooks();
model.addAttribute("error","未查询到书籍");
}
model.addAttribute("list",list);
return "allBook";
}
遇见的问题;
-
导入依赖时，一定要确保依赖的正确性，如:
- javax.servlet.jsp.jstl 和 jstl，当导入第一个时包时，web项目运行时就会报错
-
在进行spring-mvc.xml的视图解析器的配置时，注意/WEB-INF和WEB-INF的区别
- 不加
/的WEB-INF他是跳转到和自己同级目录下的页面。
加/,的话他会跳转到整个网站的根目录下，如果在自己电脑上测试的的话，就是跳转到http://localhost:8080/ - 这取决于你在class外部加没加@RequestMapping，如果加了代表有两层，需要用/WEB-INF，如果没加，一层就用WEB-INF
- 不加
-
MysQL8.0+，配置文件的url中要增加一个时区的配置
-
页面的加载有时会报500的异常错误：
-
org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is java.sql.SQLException: An attempt by a client to checkout a Connection has timed out -
如果确定时区的配置没有问题，刷新页面即可
-
建完项目，导完包后，要手动建立ArtiFacts中WEB-INF下建立lib文件添加依赖
要点：
- 熟悉ssm的框架搭建和相关配置
- 对于功能的拓展要从底层开始实现
- 掌握页面间的跳转和controller，jsp之间的关联
标签：int,书籍,public,SSM,Books,books,整合,id 来源： https://www.cnblogs.com/Serendipity-gao/p/16083627.html