摘要：添加用戶接口實(shí)現(xiàn)類簡(jiǎn)單用戶鏈接數(shù)據(jù)庫(kù)微服務(wù)通過(guò)注解標(biāo)注該類為持久化操作對(duì)象。添加一個(gè)使用接收請(qǐng)求添加微服務(wù)啟動(dòng)類鏈接數(shù)據(jù)庫(kù)簡(jiǎn)單的集成框架訪問(wèn)數(shù)據(jù)庫(kù)。

-

1、訪問(wèn)數(shù)據(jù)庫(kù)，自然少不了一些持久化框架，而我本身也是Mybatis框架的支持者；
2、Mybatis是那種專注于sql的框架，對(duì)象映射以及輸入輸出都是由框架自動(dòng)完成；
3、因此本章節(jié)就簡(jiǎn)單小試牛刀嘗試下如何使用Mybatis持久化框架進(jìn)行對(duì)數(shù)據(jù)的操作；

    4.0.0

    springms-provider-user-mysql-mybatis
    1.0-SNAPSHOT
    jar
    
    
        com.springms.cloud
        springms-spring-cloud
        1.0-SNAPSHOT
    
    
    
        
        
            org.springframework.boot
            spring-boot-starter-data-jpa
        

        
        
            org.springframework.boot
            spring-boot-starter-web
        

        
        
            mysql
            mysql-connector-java
        

        
        
            org.mybatis.spring.boot
            mybatis-spring-boot-starter
            1.3.1
        
    

server:
  port: 8325
spring:
  application:
    name: springms-provider-user-mysql-mybatis  #全部小寫


#####################################################################################################
# mysql 屬性配置
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://ip:3306/hmilyylimh
    username: username
    password: password
#  jpa:
#    hibernate:
#      #ddl-auto: create #ddl-auto:設(shè)為create表示每次都重新建表
#      ddl-auto: update #ddl-auto:設(shè)為update表示每次都不會(huì)重新建表
#    show-sql: true
#####################################################################################################


#####################################################################################################
# 打印日志
logging:
  level:
    root: INFO
    org.hibernate: INFO
    org.hibernate.type.descriptor.sql.BasicBinder: TRACE
    org.hibernate.type.descriptor.sql.BasicExtractor: TRACE
    com.springms: DEBUG
#####################################################################################################

package com.springms.cloud.entity;


import javax.persistence.*;

/**
 *
 * Mybatis 需要加上這些注解才可以使用，不然啟動(dòng)都會(huì)報(bào)錯(cuò)；
 *
 */
@Entity
public class User {
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  private Long id;

  @Column
  private String username;

  @Column
  private String name;

  @Column
  private Integer age;

  @Column
  private String balance;

  public Long getId() {
    return this.id;
  }

  public void setId(Long id) {
    this.id = id;
  }

  public String getUsername() {
    return this.username;
  }

  public void setUsername(String username) {
    this.username = username;
  }

  public String getName() {
    return this.name;
  }

  public void setName(String name) {
    this.name = name;
  }

  public Integer getAge() {
    return this.age;
  }

  public void setAge(Integer age) {
    this.age = age;
  }

  public String getBalance() {
    return this.balance;
  }

  public void setBalance(String balance) {
    this.balance = balance;
  }
}

package com.springms.cloud.mapper;

import com.springms.cloud.entity.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;

import java.util.List;

/**
 * 用戶 mybatis 映射文件。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017-10-19
 *
 */
public interface IUserMapper {

    @Select("select * from user where id = #{id}")
    User findUserById(Long id);

    @Select("select * from user")
    List findAllUsers();

    @Insert("INSERT INTO user(username, name, age, balance) VALUES(#{username}, #{name}, #{age}, #{balance})")
    int insertUser(User user);
}

package com.springms.cloud.mapper.user;

/**
 *
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017-10-19
 *
 */
public class UserMapper {
}

package com.springms.cloud.service;

import com.springms.cloud.entity.User;

import java.util.List;

/**
 * 簡(jiǎn)單用戶鏈接Mysql數(shù)據(jù)庫(kù)微服務(wù)（通過(guò)@Service注解標(biāo)注該類為持久化操作對(duì)象）。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017-10-19
 *
 */
public interface IUserService {

    User findUserById(Long id);

    List findAllUsers();

    int insertUser(User user);
}

package com.springms.cloud.service.impl;

import com.springms.cloud.entity.User;
import com.springms.cloud.mapper.IUserMapper;
import com.springms.cloud.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * 簡(jiǎn)單用戶鏈接Mysql數(shù)據(jù)庫(kù)微服務(wù)（通過(guò)@Service注解標(biāo)注該類為持久化操作對(duì)象）。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017-10-19
 *
 */
@Service
public class UserServiceImpl implements IUserService {

    @Autowired
    IUserMapper iUserMapper;

    @Override
    public User findUserById(Long id) {
        return iUserMapper.findUserById(id);
    }

    @Override
    public List findAllUsers() {
        return iUserMapper.findAllUsers();
    }

    @Override
    public int insertUser(User user) {
        return iUserMapper.insertUser(user);
    }
}

package com.springms.cloud.controller;

import com.springms.cloud.entity.User;
import com.springms.cloud.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

/**
 * 用戶微服務(wù)Controller。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017-10-19
 *
 */
@RestController
public class ProviderUserMysqlMybatisController {

    @Autowired
    private IUserService iUserService;

    @GetMapping("/simple/{id}")
    public User findUserById(@PathVariable Long id) {
        return this.iUserService.findUserById(id);
    }

    @GetMapping("/simple/list")
    public List findUserList() {
        return this.iUserService.findAllUsers();
    }

    /**
     * 添加一個(gè)student,使用postMapping接收post請(qǐng)求
     *
     * http://localhost:8310/simple/addUser?username=user11&age=11&balance=11
     *
     * @return
     */
    @PostMapping("/simple/addUser")
    public User addUser(@RequestParam(value = "username", required=false) String username, @RequestParam(value = "age", required=false) Integer age, @RequestParam(value = "balance", required=false) String balance){
        User user=new User();

        user.setUsername(username);
        user.setName(username);
        user.setAge(age);
        user.setBalance(balance);

        int result = iUserService.insertUser(user);
        if(result > 0){
            return user;
        }

        user.setId(0L);
        user.setName(null);
        user.setUsername(null);
        user.setBalance(null);
        return user;
    }
}

package com.springms.cloud;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * 鏈接Mysql數(shù)據(jù)庫(kù)簡(jiǎn)單的集成Mybatis框架訪問(wèn)數(shù)據(jù)庫(kù)。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017-10-19
 *
 */
@SpringBootApplication
@MapperScan("com.springms.cloud.mapper.**")
public class MsProviderUserMysqlMybatisApplication {

    public static void main(String[] args) {
        SpringApplication.run(MsProviderUserMysqlMybatisApplication.class, args);
        System.out.println("【【【【【【 鏈接MysqlMybatis數(shù)據(jù)庫(kù)微服務(wù) 】】】】】】已啟動(dòng).");
    }
}

/****************************************************************************************
 注意：Mybatis 需要加上 entity 等注解才可以使用，不然啟動(dòng)都會(huì)報(bào)錯(cuò)；
 @MapperScan("com.springms.cloud.mapper.**") 或者在每個(gè) Mapper 接口文件上添加 @Mapper 也可以；

 一、簡(jiǎn)單用戶鏈接Mysql數(shù)據(jù)庫(kù)微服務(wù)（通過(guò) mybatis 鏈接 mysql 編寫數(shù)據(jù)訪問(wèn)）：

 1、啟動(dòng) springms-provider-user-mysql-mybatis 模塊服務(wù)，啟動(dòng)1個(gè)端口；
 2、在瀏覽器輸入地址 http://localhost:8325/simple/10 可以看到用戶ID=10的信息成功的被打印出來(lái)；

 3、使用 IDEA 自帶工具 Test Restful WebService 發(fā)送 HTTP POST 請(qǐng)求,并添加 username、age、balance三個(gè)參數(shù)，然后執(zhí)行請(qǐng)求，并去 mysql 數(shù)據(jù)庫(kù)查看數(shù)據(jù)是否存在，正常情況下 mysql 數(shù)據(jù)庫(kù)剛剛插入的數(shù)據(jù)成功了:
 4、使用 REST Client 執(zhí)行 "/simple/list" 接口，也正常將 mysql 數(shù)據(jù)庫(kù)中所有的用戶信息打印出來(lái)了；
 ****************************************************************************************/

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