整合SSM

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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>

整合SSM

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

 整合SSM

 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();
}

整合SSM

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>

整合SSM

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

整合SSM

 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();
    }
}

整合SSM

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();
}

整合SSM

 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;
    }
}

整合SSM

 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>

整合SSM

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);
            }
        }
    }
}

 整合SSM

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>

整合SSM

 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>

整合SSM

 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;
    }
}

整合SSM

④测试

整合SSM

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>

整合SSM

 2.2 spring中注入mapper :就是把service的代码补充完整 

整合SSM

2.3 测试

整合SSM

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>

整合SSM

 3.2 在controller中注入service:把controller里的代码补全 

整合SSM

3.3 测试:部署tomcat,测试

整合SSM

 

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