springBoot

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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
      public class FreemarkerController
          @RequestMapping("/freemarker")
          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);
               
           
       

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