SpringBoot整合各种主流组件实战

怼烎@ 2023-02-21 02:24 47阅读 0赞

## 1、 SpringBoot整合Mybatis ##

> 添加Mybatis的起步依赖

<dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>2.1.2</version>
    </dependency>
    
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
    </dependency>

> 添加数据库连接信息

在application.properties中添加数据量的连接信息

#DB Configuration:
    spring:
      datasource:
        url: jdbc:mysql://127.0.0.1:3306/ssm?characterEncoding=utf8&useSSL=false&serverTimezone=UTC&rewriteBatchedStatements=true
        driver-class-name: com.mysql.cj.jdbc.Driver
        username: root
        password: root

> 创建user表

在test数据库中创建user表

-- ----------------------------
    -- Table structure for `user`
    -- ----------------------------
    DROP TABLE IF EXISTS `user`;
    CREATE TABLE `user` (
      `id` int(11) NOT NULL AUTO_INCREMENT,
      `username` varchar(50) DEFAULT NULL,
      `password` varchar(50) DEFAULT NULL,
      PRIMARY KEY (`id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;
    
    -- ----------------------------
    -- Records of user
    -- ----------------------------
    INSERT INTO `user` VALUES ('1', 'zhangsan', '123');
    INSERT INTO `user` VALUES ('2', 'lisi', '123');

> 创建实体Bean

/** * @author 迷迷糊糊 * @date 2020/6/5 */
    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class User { 
        
        private int id;
        private String username;
        private String password;
    
    }

> 编写Mapper

@Mapper
    public interface UserMapper { 
    	public List<User> queryUserList();
    }

注意：@Mapper标记该类是一个mybatis的mapper接口，可以被spring boot自动扫描到spring上下文中

> 配置Mapper映射文件

在src\\main\\resources\\mapper路径下加入UserMapper.xml配置文件"

<?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.itheima.mapper.UserMapper">
        <select id="queryUserList" resultType="user">
            select * from user
        </select>
    </mapper>

> 在application.properties中添加mybatis的信息

#spring集成Mybatis环境
    mybatis:
      type-aliases-package: com.example.entity
      mapper-locations: mapper/*Mapper.xml

> service层

/** * @author 迷迷糊糊 * @date 2020/6/5 */
    public interface IUserService { 
    
        /** * 获取用户信息 * @return */
        List<User> getAllUsers();
    
    }
    
    @Service
    public class UserServiceImpl implements IUserService { 
    
        @Resource
        private UserMapper userMapper;
    
        @Override
        public List<User> getAllUsers() { 
            return userMapper.queryUserList();
        }
    }

> 编写测试Controller

/** * @author 迷迷糊糊 * @date 2020/6/5 */
    @Controller
    @RequestMapping("/user")
    public class UserController { 
    
        @Resource
        private IUserService userService;
    
        @GetMapping
        @ResponseBody
        public List<User> getUsers(){ 
            return userService.getAllUsers();
        }
    }

> 测试

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzUzMjk5OA_size_16_color_FFFFFF_t_70]

## 2、SpringBoot整合Junit ##

> 添加Junit的起步依赖

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>

> 编写测试类

package com.itheima.test;
    
    import com.itheima.MySpringBootApplication;
    import com.itheima.domain.User;
    import com.itheima.mapper.UserMapper;
    import org.junit.Test;
    import org.junit.runner.RunWith;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.test.context.SpringBootTest;
    import org.springframework.test.context.junit4.SpringRunner;
    
    import java.util.List;
    
    @RunWith(SpringRunner.class)
    @SpringBootTest(classes = MySpringBootApplication.class)
    public class DemoApplicationTests { 
    
        @Resource
        private UserMapper userMapper;
    
        @Test
        void testUser() { 
            System.out.println(userMapper.queryUserList());
        }
    
    }

> 控制台打印信息  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzUzMjk5OA_size_16_color_FFFFFF_t_70 1]

## 3、德鲁伊数据源 ##

/** * @author 迷迷糊糊 * @date 2020/6/5 */
    @Configuration
    public class DruidConfig { 
        
        @ConfigurationProperties(prefix = "spring.datasource")
        @Bean
        public DataSource druid() { 
            return new DruidDataSource();
        }
    }

spring:
      datasource:
        username: root
        password: root
        driver-class-name: com.mysql.cj.jdbc.Driver
        url: jdbc:mysql://127.0.0.1:3306/ssm?characterEncoding=utf8&useSSL=false&serverTimezone=UTC&rewriteBatchedStatements=true
        type: com.alibaba.druid.pool.DruidDataSource
        # 数据源其他配置
        initialSize: 5
        minIdle: 5
        maxActive: 20
        maxWait: 60000
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: SELECT 1 FROM DUAL
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        poolPreparedStatements: true
        # 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
        filters: stat,wall
        maxPoolPreparedStatementPerConnectionSize: 20
        useGlobalDataSourceStat: true
        connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

重新运行  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzUzMjk5OA_size_16_color_FFFFFF_t_70 2]

看后台已经切换了

还有监控呢？

完善配置文件

/** * @author 迷迷糊糊 * @date 2020/6/5 */
    @Configuration
    public class DruidConfig { 
    
        /** * 注入数据源 * @return */
        @ConfigurationProperties(prefix = "spring.datasource")
        @Bean
        public DataSource druid() { 
            return new DruidDataSource();
        }
    
    
        /** * 配置监控 * @return */
        @Bean
        public ServletRegistrationBean statViewServlet(){ 
            ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
            HashMap<String, String> map = new HashMap<>(2);
            map.put("loginUsername","xinzhi");
            map.put("loginPassword","123456");
            bean.setInitParameters(map);
            return bean;
        }
    
        @Bean
        public FilterRegistrationBean webStatFilter(){ 
            FilterRegistrationBean<Filter> bean = new FilterRegistrationBean<>();
            bean.setFilter(new WebStatFilter());
            HashMap<String, String> map = new HashMap<>(8);
            map.put("exclusions","*.js");
            bean.setInitParameters(map);
            bean.setUrlPatterns(Arrays.asList("/*"));
            return bean;
        }
    
    }

搞定

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzUzMjk5OA_size_16_color_FFFFFF_t_70 3]

## 4、Thymeleaf模板引擎 ##

**Thymeleaf整合SpringBoot**

> 在pom.xml文件引入thymeleaf

<dependency> 
         <groupId>org.springframework.boot</groupId> 
         <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>

> 在application.properties（application.yml）文件中配置thymeleaf

> 新建编辑控制层代码HelloController，在request添加了name属性，返回到前端hello.html再使用thymeleaf取值显示。

@GetMapping("/login")
    public String toLogin(HttpServletRequest request){ 
        request.setAttribute("user","zhangsan");
        return "login";
    }

> 新建编辑模板文件，在resources文件夹下的templates目录，用于存放HTML等模板文件，在这新增hello.html，添加如下代码。

<!DOCTYPE html> 
    <html lang="en" xmlns:th="http://www.thymeleaf.org"> 
    <head> 
        <meta charset="UTF-8"/> 
        <title>springboot-thymeleaf demo</title> 
    </head> 
    
    <body> 
        <p th:text="'hello, ' + ${name} + '!'" /> 
    </body> 
    </html>

切记：使用Thymeleaf模板引擎时，必须在html文件上方添加该行代码使用支持Thymeleaf。

1.  启动项目，访问http://localhost:8080/user/login，看到如下显示证明SpringBoot整合Thymeleaf成功。

![在这里插入图片描述][20200628115752913.png]

8、路径映射

如果觉得写controller太麻烦一次性多映射一些常用的地址

@Override
    protected void addViewControllers(ViewControllerRegistry registry) {
    registry.addViewController("/login").setViewName("login.html");
    registry.addViewController("/register").setViewName("register.html");
    super.addViewControllers(registry);
    }

## 5、集成Swagger终极版 ##

<dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger2</artifactId>
        <version>2.9.2</version>
    </dependency>
    
    <dependency>
        <groupId>io.springfox</groupId>
        <artifactId>springfox-swagger-ui</artifactId>
        <version>2.9.2</version>
    </dependency>

/** * @author 迷迷糊糊 * @date 2020/6/6 */
    @EnableSwagger2
    @Configuration
    public class SwaggerConfig { 
        @Bean
        public Docket customDocket() { 
            return new Docket(DocumentationType.SWAGGER_2)
                    .apiInfo(apiInfo())
                    .select()
                    .apis(RequestHandlerSelectors.basePackage("com.example.controller"))
                            .build();
        }
    
        private ApiInfo apiInfo() { 
            return new ApiInfoBuilder()
                    //文档说明
                    .title("迷糊测试专用")
                    //文档版本说明
                    .version("1.0.0")
                    .description("迷糊测试专用2")
                    .license("Apache 2.0")
                    .build();
        }
    }

/** * @author 迷迷糊糊 * @date 2020/6/5 */
    @Controller
    @RequestMapping("/user")
    @Api("用户接口测试")
    public class UserController { 
    
        @Resource
        private IUserService userService;
    
        @GetMapping("/toLogin")
        public String toLogin(HttpServletRequest request) { 
            request.setAttribute("user", "zhangsan");
            return "login";
        }
    
        @GetMapping
        @ResponseBody
        @ApiImplicitParams(
                { 
    
                }
        )
        public List<User> getUsers() { 
            return userService.getAllUsers();
        }
    
        @GetMapping("/{id}")
        @ResponseBody
        @ApiImplicitParam(name = "id", value = "用户id", dataType = "int")
        @ApiResponse(code = 200,message = "查找成功")
        public User getUserById(@PathVariable int id) { 
            return new User(1,"qwe","ewrwe");
        }
    
        @PostMapping("/login")
        @ResponseBody
        @ApiImplicitParams({ 
                @ApiImplicitParam(name = "username", value = "用户名", dataType = "string"),
                @ApiImplicitParam(name = "password", value = "密码", dataType = "string")
        })
        @ApiResponses({ 
                @ApiResponse(code = 200,message = "登录成功"),
                @ApiResponse(code = 500,message = "登录失败"),
        })
        public User login(String username,String password) { 
            return new User(12,username,password);
        }
    }

## 6、SpringBoot整合Redis ##

> 添加redis的起步依赖

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>

> 配置redis的连接信息

#Redis
    spring.redis.host=127.0.0.1
    spring.redis.port=6379

> 注入RedisTemplate测试redis操作

/** * @author 迷迷糊糊 * @date 2020/6/6 */
    @RunWith(SpringRunner.class)
    @SpringBootTest(classes = MySpringBootApplication.class)
    public class RedisTest { 
    
        @Resource
        private UserMapper userMapper;
    
        @Autowired
        private RedisTemplate<String, String> redisTemplate;
    
        @Test
        public void test() throws JsonProcessingException { 
    
            BoundHashOperations<String, Object, Object> hash = redisTemplate.boundHashOps("user:1");
            hash.put("username","zhangsan");
            hash.put("age","12");
            hash.put("password","1233");
    
    
            BoundValueOperations<String, String> userList = redisTemplate.boundValueOps("user:list");
    
            //从redis缓存中获得指定的数据
            String usersJson = userList.get();
            //如果redis中没有数据的话
            if(null==usersJson){ 
                //查询数据库获得数据
                List<User> users = userMapper.queryUserList();
                //转换成json格式字符串
                ObjectMapper om = new ObjectMapper();
                usersJson = om.writeValueAsString(users);
                //将数据存储到redis中，下次在查询直接从redis中获得数据，不用在查询数据库
                redisTemplate.boundValueOps("user:list").set(usersJson);
    
                System.out.println("===============从数据库获得数据===============");
            }else{ 
                System.out.println("===============从redis缓存中获得数据===============");
            }
    
            System.out.println(usersJson);
    
        }
    }

> 第一次

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzUzMjk5OA_size_16_color_FFFFFF_t_70 4]

> 第二次

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzUzMjk5OA_size_16_color_FFFFFF_t_70 5]

## 7、定时任务 ##

@EnableScheduling
    public class MySpringBootApplication

/** * @author 迷迷糊糊 * @date 2020/6/7 */
    @Component
    public class MySchedule { 
    
        @Scheduled(fixedDelay = 3000)
        public void fixedDelay(){ 
            System.out.println("fixedDelay:"+new Date());
        }
    
        @Scheduled(fixedRate = 3000)
        public void fixedRate(){ 
            System.out.println("fixedRate:"+new Date());
        }
    
    
        @Scheduled(initialDelay = 1000,fixedDelay = 2000)
        public void initialDelay(){ 
            System.out.println("initialDelay:"+new Date());
        }
    
        @Scheduled(cron = "0 * * * * ?")
        public void cron(){ 
            System.out.println("cron:"+new Date());
        }
    
    }

结果

fixedRate:Sun Jun 07 11:16:17 CST 2020
    fixedDelay:Sun Jun 07 11:16:17 CST 2020
    2020-06-07 11:16:17.337  INFO 11928 --- [           main] com.example.MySpringBootApplication      : Started MySpringBootApplication in 6.028 seconds (JVM running for 8.211)
    initialDelay:Sun Jun 07 11:16:18 CST 2020
    fixedRate:Sun Jun 07 11:16:20 CST 2020
    fixedDelay:Sun Jun 07 11:16:20 CST 2020
    initialDelay:Sun Jun 07 11:16:20 CST 2020
    initialDelay:Sun Jun 07 11:16:22 CST 2020
    fixedRate:Sun Jun 07 11:16:23 CST 2020
    fixedDelay:Sun Jun 07 11:16:23 CST 2020
    initialDelay:Sun Jun 07 11:16:24 CST 2020
    fixedRate:Sun Jun 07 11:16:26 CST 2020
    fixedDelay:Sun Jun 07 11:16:26 CST 2020
    initialDelay:Sun Jun 07 11:16:26 CST 2020
    initialDelay:Sun Jun 07 11:16:28 CST 2020
    fixedRate:Sun Jun 07 11:16:29 CST 2020
    fixedDelay:Sun Jun 07 11:16:29 CST 2020
    initialDelay:Sun Jun 07 11:16:30 CST 2020

> 区别

1、fixedDelay控制方法执行的间隔时间，是以上一次方法执行完开始算起，如上一次方法执行阻塞住了，那么直到上一次执行完，并间隔给定的时间后，执行下一次。

2、fixedRate是按照一定的速率执行，是从上一次方法执行开始的时间算起，如果上一次方法阻塞住了，下一次也是不会执行，但是在阻塞这段时间内累计应该执行的次数，当不再阻塞时，一下子把这些全部执行掉，而后再按照固定速率继续执行。

3、cron表达式可以定制化执行任务，但是执行的方式是与fixedDelay相近的，也是会按照上一次方法结束时间开始算起。

4、initialDelay 。如： @Scheduled(initialDelay = 10000,fixedRate = 15000  
这个定时器就是在上一个的基础上加了一个initialDelay = 10000 意思就是在容器启动后,延迟10秒后再执行一次定时器,以后每15秒再执行一次该定时器

> quartz自学

## 8、集成shiro（先学shiro） ##

## 9、整合Spring Data JPA（自学） ##

> 添加Spring Data JPA的起步依赖

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>

> 添加数据库驱动依赖

<dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>

> 在application.properties中配置数据库和jpa的相关属性

#DB Configuration:
    spring.datasource.driverClassName=com.mysql.jdbc.Driver
    spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=utf8
    spring.datasource.username=root
    spring.datasource.password=root
    
    #JPA Configuration:
    spring.jpa.database=MySQL
    spring.jpa.show-sql=true
    spring.jpa.generate-ddl=true
    spring.jpa.hibernate.ddl-auto=update
    spring.jpa.hibernate.naming_strategy=org.hibernate.cfg.ImprovedNamingStrategy

> 创建实体配置实体

@Entity
    public class User { 
        // 主键
        @Id
        @GeneratedValue(strategy = GenerationType.IDENTITY)
        private Long id;
        // 用户名
        private String username;
        // 密码
        private String password;
        // 姓名
        private String name;
     
        //此处省略setter和getter方法... ...
    }

> 编写UserRepository

public interface UserRepository extends JpaRepository<User,Long>{ 
        public List<User> findAll();
    }

> 编写测试类

@RunWith(SpringRunner.class)
    @SpringBootTest(classes=MySpringBootApplication.class)
    public class JpaTest { 
    
        @Autowired
        private UserRepository userRepository;
    
        @Test
        public void test(){ 
            List<User> users = userRepository.findAll();
            System.out.println(users);
        }
    
    }

> 控制台打印信息

![在这里插入图片描述][20200628115945912.png]

注意：如果是jdk9，执行报错如下：

![在这里插入图片描述][20200628115954152.png]

原因：jdk缺少相应的jar

解决方案：手动导入对应的maven坐标，如下：

<dependency>
        <groupId>javax.xml.bind</groupId>
        <artifactId>jaxb-api</artifactId>
        <version>2.3.0</version>
    </dependency>

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzUzMjk5OA_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200628115702598.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzUzMjk5OA==,size_16,color_FFFFFF,t_70
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzUzMjk5OA_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20200628115738398.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzUzMjk5OA==,size_16,color_FFFFFF,t_70
[20200628115752913.png]: https://img-blog.csdnimg.cn/20200628115752913.png
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[20200628115945912.png]: https://img-blog.csdnimg.cn/20200628115945912.png
[20200628115954152.png]: https://img-blog.csdnimg.cn/20200628115954152.png