【SSM】—— Spring+SpringMVC+MyBatis整合使用-编程知识

SSM整合流程

1、创建工程

2、SSM整合

1)Spring

2)MyBatis

3)SpringMVC

3、功能模块

表与实体类

dao（接口+自动代理）

service（接口+实现类）

controller

4、测试

SSM整合流程

1、创建工程

新建模块可参考：【SpringMVC】—— 如何配置使用SpringMVC（详细步骤）-CSDN博客

pom.xml加入以下坐标

<properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><maven.compiler.source>1.8</maven.compiler.source><maven.compiler.target>1.8</maven.compiler.target></properties>  <dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.2.10.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.2.10.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>5.2.10.RELEASE</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.6</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.0</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.47</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.1.16</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version><scope>test</scope></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version><scope>provided</scope></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.9.0</version></dependency></dependencies><build><plugins><plugin><groupId>org.apache.tomcat.maven</groupId><artifactId>tomcat7-maven-plugin</artifactId><version>2.1</version><configuration><port>80</port><path>/</path></configuration></plugin></plugins></build>

2、SSM整合

项目目录结构如下：

1)Spring

SpringConfig

@Configuration
@ComponentScan({"com.spring.service"})
@PropertySource("classpath:jdbc.properties")
@Import({JdbcConfig.class, MyBatisConfig.class})
public class SpringConfig {
}

2)MyBatis

MybatisConfig

public class MyBatisConfig {@Beanpublic SqlSessionFactoryBean sqlSessionFactoryBean(DataSource dataSource){SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();factoryBean.setDataSource(dataSource);factoryBean.setTypeAliasesPackage("com.spring.domain");return factoryBean;}@Beanpublic MapperScannerConfigurer mapperScannerConfigurer(){MapperScannerConfigurer msc = new MapperScannerConfigurer();msc.setBasePackage("com.spring.dao");return msc;}
}

JdbcConfig

public class JdbcConfig {@Value("${jdbc.driver}")private String driver;@Value("${jdbc.url}")private String url;@Value("${jdbc.username}")private String username;@Value("${jdbc.password}")private String password;@Beanpublic DataSource dataSource(){DruidDataSource dataSource = new DruidDataSource();dataSource.setDriverClassName(driver);dataSource.setUrl(url);dataSource.setUsername(username);dataSource.setPassword(password);return dataSource;}
}

jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm
jdbc.username=root
jdbc.password=你的密码

3)SpringMVC

ServletConfig

public class ServletConfig extends AbstractAnnotationConfigDispatcherServletInitializer {protected Class<?>[] getRootConfigClasses() {return new Class[]{SpringConfig.class};}protected Class<?>[] getServletConfigClasses() {return new Class[]{SpringMvcConfig.class};}protected String[] getServletMappings() {return new String[]{"/"};}
}

SpringMvcConfig

@Configuration
@ComponentScan("com.spring.controller")
@EnableWebMvc
public class SpringMvcConfig {
}

3、功能模块

表与实体类

数据库建表

create database ssm;
use ssm;
create table tbl_book(id int primary key auto_increment,type varchar(20),name varchar(50),description varchar(255)
);

insert into tbl_book values(1,'理论','操作系统','op')

Book

public class Book {private Integer id;private String type;private String name;private String description;public String toString(){return "Book{" +"id=" + id +",type='" + type + '\'' +", name='" + name + '\''+",description='" + description + '\''+'}';}public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getType() {return type;}public void setType(String type) {this.type = type;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}}

dao（接口+自动代理）

BookDao

public interface BookDao {@Insert("insert into tbl_book values(null,#{type},#{name},#{description})")public void save(Book book);@Update("update tbl_book set type = #{type}, name = #{name}, description = #{description} where id = #{id}")public void update(Book book);@Delete("delete from tbl_book where id = #{id}")public void delete(Integer id);@Select("select * from tbl_book where id = #{id}")public Book getById(Integer id);@Select("select * from tbl_book")public List<Book> getAll();
}

service（接口+实现类）

BookService

public interface BookService {/** 保存*/public boolean save(Book book);/** 修改*/public boolean update(Book book);/** 根据id删除*/public boolean delete(Integer id);/** 根据id查询*/public Book getById(Integer id);/** 查询全部*/public List<Book> getAll();
}

BookServiceImpl

@Service
public class BookServiceImpl implements BookService {@Autowiredprivate BookDao bookDao;public boolean save(Book book) {bookDao.save(book);return true;}public boolean update(Book book) {bookDao.update(book);return true;}public boolean delete(Integer id) {bookDao.delete(id);return true;}public Book getById(Integer id) {return bookDao.getById(id);}public List<Book> getAll() {return bookDao.getAll();}
}

controller

BookController

@RestController
@RequestMapping("/books")
public class BookController {@Autowiredprivate BookService bookService;@PostMappingpublic boolean save(@RequestBody Book book) {return bookService.save(book);}@PutMappingpublic boolean update(@RequestBody Book book) {return bookService.update(book);}@DeleteMapping("/{id}")public boolean delete(@PathVariable Integer id) {return bookService.delete(id);}@GetMapping("/{id}")public Book getById(@PathVariable Integer id) {return bookService.getById(id);}@GetMappingpublic List<Book> getAll() {return bookService.getAll();}
}

4、测试

BookServiceTest

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfig.class)
public class BookServiceTest {@Autowiredprivate BookService bookService;@Testpublic void testGetById(){Book book = bookService.getById(1);System.out.println(book);}@Testpublic void testGetAll(){List<Book> all = bookService.getAll();System.out.println(all);}
}