操作：

　　 <!--数据库操作-->
    <!-- https://mvnreposITory.COM/artifact/org.mybatis/mybatis -->
    <dePEndency>
      <groupId>org.mybatis</groupId>
      <artifactId>;mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>

    <!--负责在容器中找东西-->
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>

    <!--创建一个容器-->
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>

    <!--读spring.XMl new类-->
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>

    <!--相当于servlet-->
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>

    <!--连接池-->
    <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.10</version>
    </dependency>

    <!--MySQL-->
    <!-- https://mvnrepository.com/artifact/mySQL/mysql-connector-java -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.38</version>
    </dependency>

    <!--事务管理器-->
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-tx -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>

    <!--用于事务管理器连接数据库-->
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>4.3.8.RELEASE</version>
    </dependency>

    <!--mybatis和spring连接桥梁-->
    <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.2</version>
    </dependency>

    <!--自动转json-->
    <dependency>
      <groupId>com.fasterxML.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.9.0</version>
    </dependency>

    <!--自动转json-->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.9.0</version>
    </dependency>

    <!--自动转json-->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.0</version>
    </dependency>

/**
 *  实体类
 *
*/
public class Bank {
    private int id;
    private String name;
    private int money;
    //自行补全构造器、get/set方法、重写toString
}


/**
 *  DAO接口层
 *
*/
public interface BankDAO {
    public List<Bank> findAll();
    public Bank findOne(int id);
}


/**
 *  services层
 *
*/
@Service    // <bean id = "userService"  class = "com.zyp.myssm.services.UserService"/>
public class BankService {
    @Resource
    private BankDAO bdao;

    public List<Bank> findAll(){
        return bdao.findAll();
    }

    public Bank findOne(int id){
        return bdao.findOne(id);
    }
}


/**
 *  controller层
 *
*/
@RestController // 全是servlet ， 所有都返回json
public class InitCtrl {
    // 不写名字， spring会自动用类型去获得对象getBean(UserService.class)
    @Resource
    private BankService bs;

    // 把每个方法看成一个小的servlet
    @RequestMapping("/init.do")
    public List<Bank> init() {
        return bs.findAll();
    }

    @RequestMapping("/find.do")
    public Bank find(int id) {
        return bs.findOne(id);
    }
}