SSM整合_demo

整合流程

code：https://github.com/Albertzzd/ssm_demo_case

  • 创建maven工程

  • 创建文件目录结构：config、dao、domain、Service、controller

  • Spring环境搭建

    • xml坐标导入-springmvc

      <?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>ssm_code</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <!-- 依赖管理 -->
    <dependencies>
        <!-- SpringMVC（底层依赖Spring）-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.10.RELEASE</version>
        </dependency>

    </dependencies>
    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>

</project>

    • SpringConfig

      @Configuration
@ComponentScan("com.itcase.service")
public class SpringConfig {
}

    • domain实体类

  • Spring整合Mybatis：业务层和持久层

    • xml坐标导入

              <!-- Spring整合Mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>

        <!-- Spring JDBC : 声明式事务 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.10.RELEASE</version>
        </dependency>

        <!-- Spring整合Junit -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.2.10.RELEASE</version>
        </dependency>

        <!-- MySQL -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>

        <!-- Mybatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.6</version>
        </dependency>

        <!-- druid连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.1</version>
        </dependency>

        <!-- Junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

    • jdbc配置

      jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/ssm_db?useSSL=false&characterEncoding=utf8
jdbc.username=root
jdbc.password=root

    • JdbcConfig配置：配置连接池、事务管理器

      //配置：连接池、事务管理器
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;

    //设置连接池
    @Bean
    public DataSource dataSource(){
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName(driver);
        dataSource.setUrl(url);
        dataSource.setUsername(username);
        dataSource.setPassword(password);
        return dataSource;
    }

    //设置事务管理器 (声明式事务)
    @Bean
    public PlatformTransactionManager transactionManager(DataSource dataSource){
        //PlatformTransactionManager是DataSourceTransactionManager的父接口
        DataSourceTransactionManager dstm = new DataSourceTransactionManager();
        dstm.setDataSource(dataSource);
        return dstm;
    }
}

    • MybatisConfig配置

      //Mybatis配置类
public class MybatisConfig {
    @Bean
    public SqlSessionFactoryBean getSqlSessionFactoryBean(DataSource ds){
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        //设置pojo的包扫描
        factoryBean.setTypeAliasesPackage("com.itcase.domain");
        //设置连接池
        factoryBean.setDataSource(ds);
        return factoryBean;
    }

    @Bean
    public MapperScannerConfigurer mapperScannerConfigurer(){
        MapperScannerConfigurer msc = new MapperScannerConfigurer();
        //设置dao层的接口扫描
        msc.setBasePackage("com.itcase.dao");
        return msc;
    }
}

      更新SpringConfig配置类

      @Configuration//Spring配置类
@ComponentScan("com.itcase.service")//扫描指定包下的类，并添加到Ioc容器
@PropertySource("classpath:db.properties")//加载外部配置文件
@Import({JdbcConfig.class,MybatisConfig.class})//引入配置类
@EnableWebMvc//开启事物管理支持
public class SpringConfig {
}

    • dao层代码

    • service层代码：接口+实现类

      增加@Transactional事务声明

  • SpringMVC整合：业务层和表现层

    • XML坐标导入：JSON、Servlet

              <!-- Servlet -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <!-- Jackson : 实现json格式和javabean之间的数据转换 -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.0</version>
        </dependency>

    • SpringMVC配置

      @Configuration
@ComponentScan("com.itcase.controller")
@EnableWebMvc //JSON自动转换
public class SpringmvcConfig {
}

    • Web容器配置

      public class ServletInitConfig extends AbstractAnnotationConfigDispatcherServletInitializer {
    @Override
    protected Class<?>[] getRootConfigClasses() {
        //指定spring配置类加载(根配置)
        return new Class[]{SpringConfig.class};
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        //指定springmvc配置类加载
        return new Class[]{SpringmvcConfig.class};
    }

    @Override
    protected String[] getServletMappings() {
        //配置springmvc拦截路径为 / (全路径)
        return new String[]{"/"};
    }

    //中文乱码过滤器
    @Override
    protected Filter[] getServletFilters() {
        CharacterEncodingFilter encodingFilter = new CharacterEncodingFilter();
        encodingFilter.setEncoding("utf-8");
        return new Filter[]{encodingFilter};
    }
}

    • 编写Controller层代码

      @RestController
@RequestMapping("/book")
public class BookController {
    @Autowired
    private BookService bookService;

    @PostMapping
    public boolean save(@RequestBody Book book) {
        return bookService.saveBook(book);
    }

    @PutMapping
    public boolean update(@RequestBody Book book) {
        return bookService.updateBook(book);
    }

    @DeleteMapping("/{id}")
    public boolean delete(@PathVariable Integer id) {
        return bookService.deleteBookById(id);
    }

    @GetMapping("/{id}")
    public Book getById(@PathVariable Integer id) {
        return bookService.getBookById(id);
    }

    @GetMapping
    public List<Book> getAll() {
        return bookService.getAllBook();
    }
}

    • Tomcat配置

  • 联合postman测试

  • 封装表现层数据

  • SpringMVC异常处理器

    @RestControllerAdvice
public class ProjectExceptionAdvice {
    //专门处理业务功能导致的异常
    @ExceptionHandler(BusinessException.class)
    public Result doBusinessException(BusinessException ex){
        //发送对应消息传递给用户，提醒规范操作
        return new Result(ex.getCode(),ex.getMessage());
    }

    //专门处理系统异常
    @ExceptionHandler(SystemException.class)
    public Result doSystemException(SystemException ex){
        //发送固定消息传递给用户，安抚用户
        //发送特定消息给运维人员，提醒维护
        //记录日志
        return new Result(ex.getCode(),ex.getMessage());
    }

    //处理其他未知异常
    @ExceptionHandler(Exception.class)
    public Result doException(Exception ex){
        //发送固定消息传递给用户，安抚用户
        //发送特定消息给编程人员，提醒维护
        //记录日志
        return new Result(Code.SYSTEM_UNKNOW_ERR,"服务器正在维护,请稍后访问");
    }
}

  • SpringMVC拦截器使用

    自定义拦截器(通知)

    配置拦截器拦截规则(切入点)

    修改SpringmvcConfig配置(新增扫描config包)

文件目录结构

posted @   Albert-ZZD  阅读(45)  评论(0)  编辑  收藏  举报
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