Spring+SpringMVC+Mybatis整合Demo(Maven项目)

版权声明：转载望注明地址 https://blog.csdn.net/x_san3/article/details/81537461

创建项目

1. 先上项目demo目录：

2. pom.xml的完整内容为

<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/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.san</groupId>
	<artifactId>ssm-demo</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>ssm-demo Maven Webapp</name>
	<url>http://maven.apache.org</url>

	<properties>
		<spring.version>4.1.2.RELEASE</spring.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.1.0</version>
		</dependency>
		<!-- 添加Spring依赖 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context-support</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aspects</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spring.version}</version>
		</dependency>
		
		<!--mybatis依赖 -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.3.0</version>
		</dependency>
		<!-- mybatis/spring包 -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>1.2.3</version>
		</dependency>
		<!-- mysql驱动包 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.38</version>
		</dependency>
		
		<!-- Json转化依赖 -->
		<dependency>
			<groupId>net.sf.json-lib</groupId>
			<artifactId>json-lib</artifactId>
			<version>2.4</version>
			<classifier>jdk15</classifier>
		</dependency>
		<!--log4j -->
		<!-- https://mvnrepository.com/artifact/org.apache.logging.log4j/log4j-core -->
		<dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-core</artifactId>
			<version>2.8.2</version>
		</dependency>
		<!--NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config -->
		<!-- https://mvnrepository.com/artifact/jstl/jstl -->
		<dependency>
			<groupId>jstl</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>

	</dependencies>
	<build>
		<finalName>ssm-demo</finalName>
	</build>
</project>

3. web.xml中的完整内容为

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
	 
	<!-- 读取spring配置文件 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:spring-application.xml</param-value>
	</context-param>

	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<!-- 定义Spring MVC的前端控制器 -->
	<servlet>
		<servlet-name>springmvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:spring-mvc.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>

	<!-- 让Spring MVC的前端控制器拦截所有请求 -->
	<servlet-mapping>
		<servlet-name>springmvc</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	
	<!-- 编码过滤器 -->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <async-supported>true</async-supported>
        <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>
	
</web-app>

4. spring-mvc.xml的完整代码为

<?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-4.2.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd     
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.2.xsd">

	<!-- 启用注解驱动  -->
	<mvc:annotation-driven />
	
	<!-- 扫描controller（controller层注入） -->
	
	<context:component-scan
		base-package="com.san.controller" />

	<!-- 配置视图解析器,跳转的文件的前后缀 -->
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/view/" />
		<property name="suffix" value=".jsp" />
	</bean>
</beans>

5. spring-application.xml的完整代码为

<?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-4.2.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd     
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-4.2.xsd">

	<!-- 引入jdbc配置文件 -->
	<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="locations">
			<list>
				<value>classpath:jdbc.properties</value>
				<!--要是有多个配置文件，只需在这里继续添加即可 -->
			</list>
		</property>
	</bean>

	<!-- 配置数据源 -->
	<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<!-- 使用properties来配置 -->
		<property name="driverClassName">
			<value>${jdbc_driverClassName}</value>
		</property>
		<property name="url">
			<value>${jdbc_url}</value>
		</property>
		<property name="username">
			<value>${jdbc_username}</value>
		</property>
		<property name="password">
			<value>${jdbc_password}</value>
		</property>
	</bean>

	<!-- 配置Mybatis的文件 ，mapperLocations配置**Mapper.xml文件位置，configLocation配置mybatis-config文件位置 -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="mapperLocations" value="classpath:mapper/*.xml" />
		<property name="configLocation" value="classpath:mybatis-config.xml" />
	</bean>
	
	<!-- 自动扫描了所有的XxxxMapper.xml对应的mapper接口文件，这样就不用一个一个手动配置Mpper的映射了，只要Mapper接口类和Mapper映射文件对应起来就可以了 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.san.dao" />
	</bean>

	<!-- 自动扫描注解的bean -->
	<context:component-scan base-package="com.san.service" />

</beans>

6. jdbc.properties的完整代码为

jdbc_driverClassName=com.mysql.jdbc.Driver
jdbc_url=jdbc:mysql://localhost:3306/mydemo?useSSL=false
jdbc_username=root
jdbc_password=123456

7. mybatis-config.xml的完整代码为，暂没加配置项

<?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>

代码展示

1. model块的User.java代码为

 public class User {
	private Integer userId;  
    private String userName;  
    private String userPassword;  
 
    public Integer getUserId() {  
        return userId;  
    }  
  
    public void setUserId(Integer userId) {  
        this.userId = userId;  
    }  
  
    public String getUserName() {  
        return userName;  
    }  
  
    public void setUserName(String userName) {  
        this.userName = userName;  
    }  
  
    public String getUserPassword() {  
        return userPassword;  
    }  
  
    public void setUserPassword(String userPassword) {  
        this.userPassword = userPassword;  
    } 
}

2. Dao层的UserDao.java代码为

 public interface UserDao {
	public User selectUserById(Integer userId);

}

3. Service层的接口UserService.java代码为

public interface UserService {
	User selectUserById(Integer userId);  
}

4. Service层的实现UserServiceImpl.java代码为

@Service
public class UserServiceImpl implements UserService {
	@Autowired  
    private UserDao userDao;  
  
    public User selectUserById(Integer userId) {  
        return userDao.selectUserById(userId);  
          
    } 
}

5. Controller层的UserController.java代码为

@Controller
@RequestMapping("/user")
public class UserController {
	
    @Resource  
    private UserService userService;  
      
    @RequestMapping("/userhello")    
    public ModelAndView getIndex(){   
        ModelAndView mav = new ModelAndView("index");   
        User user = userService.selectUserById(1);  
        System.out.println(user.getUserName() + user.getUserPassword());
        mav.addObject("hello", "Hello Spring MVC!!!");
        mav.addObject("user", user);
        return mav;    
    }
}

6. 映射文件：UserMapper.xml代码为

<?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.san.dao.UserDao">
	<!--设置model类和数据库中表的字段一一对应，注意数据库字段和model类中的字段名称不致，此处一定要！ -->
	<resultMap id="BaseResultMap" type="com.san.model.User">
		<id column="USER_ID" property="userId" jdbcType="INTEGER" />
		<result column="USER_NAME" property="userName" jdbcType="CHAR" />
		<result column="USER_PASSWORD" property="userPassword" jdbcType="CHAR" />
	</resultMap>
	<!-- 查询单条记录 -->
	<select id="selectUserById" parameterType="int" resultMap="BaseResultMap">
		SELECT * FROM t_user WHERE USER_ID = #{userId}
	</select>
</mapper>

7. index.jsp中的代码为：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<html>
<body>
	<h2>${hello}</h2>
	<hr/>
	用户名： ${user.userName}<br>
	密码： ${user.userPassword}<br>
</body>
</html>

数据库部分

1 .创建mydemo的数据库

2. 创建表

CREATE TABLE `t_user` (
`USER_ID` int(11) NOT NULL AUTO_INCREMENT,
`USER_NAME` char(30) NOT NULL,
`USER_PASSWORD` char(10) NOT NULL,
PRIMARY KEY (`USER_ID`),
KEY `IDX_NAME` (`USER_NAME`)
)ENGINE=InnoDB AUTO_INCREMENT=11 DEFAULT CHARSET=utf8

3. 插入数据

INSERT INTO t_user (USER_ID, USER_NAME,USER_PASSWORD) VALUES (1, 'Zhang San', '654321');
INSERT INTO t_user (USER_ID, USER_NAME,USER_PASSWORD) VALUES (2, 'Li Si', '123456');

运行测试

启动tomcat，运行项目，在浏览器中输入

http://localhost:8080/user/userhello

显示结果为

注：有些同学可能需要输出项目名加映射路径才能访问，或者项目会报404，可参考：

https://blog.csdn.net/x_san3/article/details/81560608  看看是不是这个问题。

源码下载地址

CSDN：https://download.csdn.net/download/x_san3/10593561