springBoot

一、springBoot的作用

  简化spring框架的搭建;springboot有自己特定的配置方式

二、springboot继承web(jsp)

  1.导包
      

父模块
          <parent>
              <groupId>org.springframework.boot</groupId>
              <artifactId>spring-boot-starter-parent</artifactId>
              <version>2.0.5.RELEASE</version>
          </parent>
      子模块添加spring-boot-starter-web依赖
          <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-starter-web</artifactId>
          </dependency>
          <!-- servlet 依赖. -->
          <dependency>
              <groupId>javax.servlet</groupId>
              <artifactId>javax.servlet-api</artifactId>
              <scope>provided</scope>
          </dependency>
          <dependency>
              <groupId>javax.servlet</groupId>
              <artifactId>jstl</artifactId>
          </dependency>
          <!-- tomcat 的支持. -->
          <dependency>
             <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-tomcat</artifactId>
               <scope>provided</scope>
          </dependency>
          <dependency>
              <groupId>org.apache.tomcat.embed</groupId>
              <artifactId>tomcat-embed-jasper</artifactId>
          </dependency>

 

 2.配置application.properties对jsp的支持     

# 页面默认前缀目录
spring.mvc.view.prefix=/WEB-INF/views/
# 响应页面默认后缀
spring.mvc.view.suffix=.jsp

 

 3.controller层     

 //不适用@RestController是因为@RestController还包含@ResponBody
      @Controller 
      public class JSPController {
          @RequestMapping("/jsp")
          public String jsp(Model model){
              model.addAttribute("username", "只是测试一把");
              return "hello";
          }
      }
  4.编写jsp页面  hello.jsp
  5.运行启动服务器
      @SpringBootApplication
      public class JSPapplication {
          public static void main(String[] args){
              SpringApplication.run(JSPapplication.class,args);
          }
      }

 

三、集成freemarker

  1.导包      

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

 

  2.配置文件application.properties      

//设置文件路径,程序默认去resources文件夹下面找templates,所以下面的可以不用配置
      spring.freemarker.tempalte-loader-path=classpath:/templates
      //spring.freemarker.cache=false//缓存
      //spring.freemarker.charset=UTF-8
      //spring.freemarker.check-template-location=true
      spring.freemarker.expose-session-attributes=true//暴露session的属性
      spring.freemarker.allow-session-override=true//允许session属性覆盖
      spring.freemarker.suffix=.ftl//设置后缀

 

  3.controller层     

@Controller
@RequestMapping("/freemarker")
public class FreemarkerController {
    
    @RequestMapping("/test")
    public String test(Model model) {
        model.addAttribute("username", "怡宝测试");
        return "hello";
    }
}

  4.运行主配置类,启动服务器      

@SpringBootApplication
public class FreemarkerApplication {
    public static void main(String[] args) {
        springApplication.run(FreemarkerApplication.class, args);
    }
}

 

四、springboot-test测试

  1.导包        

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- web支持: 1、web mvc; 2、restful; 3、jackjson支持; 4、aop  -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>

 

  2.controller层代码      

@SpringBootApplication
public class SBTestApplication {
    public static void main(String[] args) {
        SpringApplication.run(SBTestApplication.class);
    }
}

 

  3.测试代码--test     

@RunWith(SpringRunner.class)
@SpringBootTest(classes = SBTestApplication.class)
//classes路径是Application的字节码文件
public class SBTest {
    @Test
    public void method() {
        System.out.println("1111111");
    }
}

 

五、springboot 持久化------集成JDBC

  1.导包        

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>    

 

    2.配置数据库连接--application.properties(yml也可以)        

spring.datasource.username=root
spring.datasource.password=root
spring.datasource.url=jdbc:mysql:///crm
spring.datasource.driverClassName=com.mysql.jdbc.Driver

 

    3.三层

        1.Dao层           

 public interface JDBCDao {
     List<Employee> findAll();
}

 

         2.Dao.Impl层            

@Repository
public class JDBCDaoImpl implements JDBCDao {
    //注入数据库操作对象JdbcTemplate
    @Autowired
    private JdbcTemplate jdbcTemplate;

    @Override
    public List<Employee> findAll() {
        String sql = "select id,username,password from t_employee";
        List<Employee> list = jdbcTemplate.query(sql, new BeanPropertyRowMapper<>(Employee.class));
        return list;
    }
}

 

         3.service层            

public interface JDBCService {
    List<Employee> findAll();
}

 

         4.service.impl层             

@Service
public class JDBCServiceImpl implements JDBCService {
    @Autowired
    private JDBCDao jdbcDao;

    @Override
    public List<Employee> findAll() {
        return jdbcDao.findAll();
    }
}

 

         5.controller层             

@Controller
public class JDBCController {
    @Autowired
    private JDBCService jdbcService;
    @RequestMapping("/findAll")
    public void findAll(){
        jdbcService.findAll();
    }

}

 

        6.Application类            

@SpringBootApplication
//ComponentScan:配置注解扫描,扫描@service/@Repository等
@ComponentScan("cn.itsource")
public class JDBCApplication {
    public static void main(String[] args){
        SpringApplication.run(JDBCApplication.class);
    }
}

 

         7.测试类            

@RunWith(SpringRunner.class)
@SpringBootTest(classes = JDBCApplication.class)
public class JdbcTest {
    @Autowired
    private JDBCService jdbcService;
    @Test
    public void method(){
        //注入service层调用方法
        List<Employee> employees = jdbcService.findAll();
        for (Employee e:employees) {
            System.out.println(e);
        }

    }

}

 

六、集成mybatis

  1.导包
    

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

    <!-- mysql 数据库驱动. -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>    
    <!--     
    spring-boot mybatis依赖:请不要使用1.0.0版本,因为还不支持拦截器插件,
        1.1.1 是博主写帖子时候的版本,大家使用最新版本即可
    -->
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
        <version>1.1.1</version>
    </dependency>
    <!-- 
        MyBatis提供了拦截器接口,我们可以实现自己的拦截器,
        将其作为一个plugin装入到SqlSessionFactory中。 
            Github上有位开发者写了一个分页插件,我觉得使用起来还可以,挺方便的。 
            Github项目地址: https://github.com/pagehelper/Mybatis-PageHelper
     -->    
    <dependency>
        <groupId>com.github.pagehelper</groupId>
        <artifactId>pagehelper</artifactId>
        <version>4.1.0</version>
    </dependency>

 

2.配置数据库

    同上
3.配置三层 和 *mapper.xml文件
    1.application类        

@SpringBootApplication
//扫描mapper层的接口
@MapperScan(basePackages = "cn.itsource.mapper")
public class EmployeeApplication {
    public static void main(String[] args){
        SpringApplication.run(EmployeeApplication.class);
    }
}

 

    2.*mapper.xml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="cn.itsource.mapper.EmployeeMapper">
<select id="selectAll" resultType="cn.itsource.domain.Employee">
        select id, username, password
        from t_employee
</select>
</mapper>

 

    3.application.properties配置文件        

spring.datasource.username=root
spring.datasource.password=root
spring.datasource.url=jdbc:mysql:///crm
spring.datasource.driverClassName=com.mysql.jdbc.Driver
//*mapper.xml扫描配置
mybatis.mapper-locations=classpath:cn/itsource/mapper/*.xml

 

    4.测试类        

@RunWith(SpringRunner.class)
@SpringBootTest(classes = EmployeeApplication.class)
public class MyTest {
    @Autowired
    private EmployeeService employeeService;
    @Test
    public void method(){
        List<Employee> employees = employeeService.findAll();
        for (Employee e:employees) {
            System.out.println(e);
        }
    }
}

 

posted @ 2019-08-25 14:46  涂小二  阅读(185)  评论(0编辑  收藏  举报