簡易的SSM框架整合小案例
一、創建一個web工程的maven項目
1、項目名隨便起
2、選擇好你的maven路徑，然后finish
二、配置pom.xml文件
<!-- SpringMVC-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.2.7.RELEASE</version>
</dependency>
<!-- Spring JDBC-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.2.7.RELEASE</version>
</dependency>
<!-- Spring AOP-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.2.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.2.7.RELEASE</version>
</dependency>
<!-- MyBatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.5</version>
</dependency>
<!-- MyBatis整合Spring-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.5</version>
</dependency>
<!-- MySql驅動-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.20</version>
</dependency>
<!-- C3P0-->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.5.5</version>
</dependency>
<!-- JSTL -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- ServletAPI-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
</dependency>
<!-- lombok-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
</dependency>
再在下面添加上加載資源配置
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>false</filtering>
</resource>
</resources>
三、創建java和resource文件夾，並將它們標記
1、未標記的可以手動右鍵文件夾標記，如上圖文件夾的顏色（新版的idea會自動標記）
2、在resources文件夾下先創建一個空的springmvc.xml和spring.xml配置文件放着先
四、配置web.xml文件
直接全復制粘貼就好
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<!-- 啟動Spring -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Spring MVC -->
<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:springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 字符編碼過濾器 -->
<filter>
<filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 加載靜態資源 -->
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.js</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.css</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.jpg</url-pattern>
</servlet-mapping>
</web-app>
五、創建數據庫
為方便部分老鐵，sql語句就奉上了
CREATE DATABASE `ssm`;
USE `ssm`;
DROP TABLE IF EXISTS `t_user`;
CREATE TABLE `t_user` (
`id` int(10) NOT NULL AUTO_INCREMENT,
`username` varchar(50) DEFAULT NULL,
`password` varchar(50) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
insert into `t_user`(`id`,`username`,`password`) values (1,'ximen','12345'),(2,'admin','admin'),(3,'giao','123'),(4,'root','root');
六、創建entity和repository文件夾並創建實體類和mapper文件
1、創建實體類
注：第一次使用Lombok的要先去IDEA插件中心去下載Lombok插件
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data//生成get和set方法
@NoArgsConstructor//生成無參構造
@AllArgsConstructor//生成有參構造
public class User {
private int id;
private String username;
private String password;
}
2、創建一個空的mapper.xml文件先放着
3、再在resource文件夾下創建一個名為config.xml的mybatis配置文件
先創建一個空的就好
七、在 spring.xml 中配置 MyBatis 和 Spring 的整合
<?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-3.2.xsd
">
<!-- 整合MyBatis -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="root"/>
<property name="password" value="root"/>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/ssm?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC"/>
<property name="driverClass" value="com.mysql.cj.jdbc.Driver"/>
<property name="initialPoolSize" value="5"/>
<property name="maxPoolSize" value="10"/>
</bean>
<!-- 配置MyBatis SqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mapperLocations" value="classpath:com/ximen/repository/*.xml"/>
<property name="configLocation" value="classpath:config.xml"/>
</bean>
<!-- 掃描自定義的Mapper接口 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.ximen.repository"/>
</bean>
</beans>
八、在config.xml 配置一些 MyBatis 輔助信息，比如打印 SQL 等
<?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>
<!-- 打印SQL-->
<setting name="logImpl" value="STDOUT_LOGGING" />
</settings>
<typeAliases>
<!-- 指定一個包名，MyBatis會在包名下搜索需要的JavaBean-->
<package name="com.ximen.entity"/>
</typeAliases>
</configuration>
九、配置springmv.xml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"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<!-- 啟動注解驅動 -->
<mvc:annotation-driven/>
<!-- 掃描業務代碼 -->
<context:component-scan base-package="com.ximen"/>
<!-- 配置視圖解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
十、創建repository接口和配置mapper文件
1、創建repository定義一個查找方法
import java.util.List;
public interface UserRepository {
public List<User> findAll();
}
2、配置mapper.xml文件
<?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.ximen.repository.UserRepository">
<select id="findAll" resultType="User">
select * from t_user
</select>
</mapper>
十一、創建service層
1、創建service接口並實現一個查找方法
import java.util.List;
public interface UserService {
public List<User> findAll();
}
2、創建service接口實現類
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserServiceImpl implements UserService{
@Autowired
private UserRepository userRepository;
@Override
public List<User> findAll() {
return userRepository.findAll();
}
}
十二、創建controller控制層
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping("/user")
public class UserHandler {
@Autowired
private UserService userService;
@GetMapping("/findAll")
public ModelAndView findAll(){
ModelAndView modelAndView = new ModelAndView();
modelAndView.setViewName("index");
modelAndView.addObject("list",userService.findAll());
return modelAndView;
}
}
十三、寫index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@page isELIgnored="false" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<c:forEach items="${list}" var="user">
${user.id}--${user.username}--${user.password}
</c:forEach>
</body>
</html>
十四、配置Tomcat，啟動
然后就整合成功了，其他CRUD的功能應該都會了吧