什么是SSM?
spring 业务层 逻辑(声明式事务)
springMVC 表示层 跟用户交互
mybatis 持久层 对数据库操作
整合思路
使用spring(容器)来整合springMVC和mybatis
具体实现步骤
1.先各自搭建SSM的环境
1.1 搭建mybatis环境
①创建数据库和数据表,准备数据环境
-- 创建学生表
CREATE TABLE student(
number VARCHAR(10) UNIQUE, -- 学号
name VARCHAR(10), -- 姓名
birthday DATE, -- 生日
address VARCHAR(200) -- 地址
);
-- 添加数据
INSERT INTO student VALUES ('hm001','张三','1995-05-05','北京市昌平区');
INSERT INTO student VALUES ('hm002','李四','1996-06-06','北京市海淀区');
INSERT INTO student VALUES ('hm003','王五','1997-07-07','北京市朝阳区');
INSERT INTO student VALUES ('hm004','赵六','1998-08-08','北京市丰台区');
INSERT INTO student VALUES ('hm005','周七','1999-09-09','北京市顺义区');
INSERT INTO student VALUES ('hm006','孙悟空','2000-01-01','花果山水帘洞');
INSERT INTO student VALUES ('hm007','猪八戒','2001-02-02','高老庄翠兰家');
INSERT INTO student VALUES ('hm008','沙和尚','2002-03-03','流沙河河底');
INSERT INTO student VALUES ('hm009','唐玄奘','2003-04-04','东土大唐');
②创建web项目,导入依赖
<dependencies>
<!--mybatis相关-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.1.15</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.1</version>
</dependency>
<!--spring相关-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.7</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
</dependency>
<!--spring跟mybatis整合-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.5</version>
</dependency>
<!--json转换-->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.8</version>
</dependency>
<!--辅助-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.22</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
</dependencies>
③创建实体类
package com.ning.domain;
import com.fasterxml.jackson.annotation.JsonFormat;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import java.util.Date;
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Student {
private String number;//学号
private String name;//姓名
//手动指定json转换格式 设置好日期格式和时区
@JsonFormat(pattern = "yyyy-MM-dd",timezone = "Asia/Shanghai")
private Date birthday;//生日
private String address;//住址
④创建mapper
package com.ning.mapper;
import com.ning.domain.Student;
import org.apache.ibatis.annotations.Select;
import java.util.List;
public interface StudentMapper {
//查询所有
@Select("select * from student ")
List<Student> findAll();
}
⑤ 加入配置文件
<?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>
<!-- 导入外部配置文件 -->
<properties resource="jdbc.properties"></properties>
<!-- 数据环境 -->
<environments default="dev">
<environment id="dev">
<!-- 事务管理器 -->
<transactionManager type="JDBC"></transactionManager>
<!-- 数据源 -->
<dataSource type="POOLED">
<property name="driver" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</dataSource>
</environment>
</environments>
<!-- 扫描映射包 -->
<mappers>
<package name="com.ning.mapper"/>
</mappers>
</configuration>
⑥加入日志配置文件
### 设置###
log4j.rootLogger = debug,stdout
### è¾åºä¿¡æ¯å°æ§å¶æ¬ ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
⑦测试
package com.ning.test;
import com.ning.domain.Student;
import com.ning.mapper.StudentMapper;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
public class StudentMapperTest {
@Test
public void testFindAll() throws IOException {
//1.读取配置文件,将配置文件读成数据流
InputStream inputStream = Resources.getResourceAsStream("mybatis-config.xml");
//2.获取sqlSessionFactory
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
//3.获取sqlSession
SqlSession sqlSession = sqlSessionFactory.openSession();
//4.获取Mapper,执行操作
StudentMapper mapper = sqlSession.getMapper(StudentMapper.class);
List<Student> studentList = mapper.findAll();
for (Student student : studentList) {
System.out.println(student);
}
//5.提交事务
sqlSession.commit();
//6.释放资源
sqlSession.close();
}
}
1.2 搭建Spring环境
①创建service接口
package com.ning.service;
import com.ning.domain.Student;
import java.util.List;
public interface StudentService {
//查询全部
List<Student> findAll();
}
②创建service实现类
package com.ning.service.impl;
import com.ning.domain.Student;
import com.ning.mapper.StudentMapper;
import com.ning.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class StudentServiceImpl implements StudentService {
//todo 这块代码暂时缺失,等到spring和mybatis整合完毕,就可以使用了
@Autowired
private StudentMapper studentMapper;
@Override
public List<Student> findAll() {
//todo 这块代码暂时缺失,等到spring和mybatis整合完毕,就可以使用了
//return studentMapper.findAll();
System.out.println("查询成功");
return null;
}
}
③加入配置文件
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 注解扫描 -->
<context:component-scan base-package="com.ning.service"></context:component-scan>
</beans>
④测试
package com.ning.test;
import com.ning.domain.Student;
import com.ning.service.StudentService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import java.util.List;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class StudentServiceTest {
@Autowired
private StudentService studentService;
@Test
public void testFindAll() {
List<Student> studentList = studentService.findAll();
if (studentList != null) {
for (Student student : studentList) {
System.out.println(student);
}
}
}
}
1.3 搭建SpringMVC环境
① 创建配置文件springmvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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/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">
<!-- 注解扫描 -->
<context:component-scan base-package="com.ning.controller"></context:component-scan>
<!-- 注解驱动 -->
<mvc:annotation-driven/>
</beans>
②配置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">
<!-- 前端控制器 -->
<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:spring-mvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 中文乱码过滤器 -->
<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>
</web-app>
③编写处理器
package com.ning.controller;
import com.ning.domain.Student;
import com.ning.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
@RestController
public class StudentController {
//todo 整合之后再来获取
//@Autowired
private StudentService studentService;
@GetMapping("/user")
public List<Student> findAll(){
//todo 整合之后再来获取
//List<Student> studentList = studentService.findAll();
List<Student> studentList = new ArrayList<Student>();
studentList.add(new Student("bm001","网三",new Date(),"北京"));
studentList.add(new Student("bm002","网四",new Date(),"北京"));
return studentList;
}
}
④测试
2.使用spring整合mybatis
2.1转移配置文件
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 注解扫描 -->
<context:component-scan base-package="com.ning.service"></context:component-scan>
<!-- 导入外部配置文件 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 数据源 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driver" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!-- 事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 指定mapper接口所在的包 -->
<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.ning.mapper"></property>
</bean>
<!-- 创建工厂类 -->
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
</bean>
</beans>
2.2 spring中注入mapper :就是把service的代码补充完整
2.3 测试
3.使用spring整合springMVC
3.1 在web.xml配置一个监听器:在xml里,配置监视器
<!-- 监听器 -->
<!-- 指定spring启动使用的配置文件 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
3.2 在controller中注入service:把controller里的代码补全
3.3 测试:部署tomcat,测试
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