摘要：添加一個(gè)使用接收請(qǐng)求添加用戶微服務(wù)啟動(dòng)類鏈接數(shù)據(jù)庫(kù)通過(guò)編寫數(shù)據(jù)庫(kù)訪問(wèn)。

-

1、本章節(jié)開(kāi)始講解一下訪問(wèn)數(shù)據(jù)庫(kù)的操作，不過(guò)其實(shí)這還不算是SpringCloud的范疇，應(yīng)該說(shuō)是SpringBoot的操作范疇，這些就先拋開(kāi)了，我們就還是講解數(shù)據(jù)庫(kù)的操作；
2、JpaRepository操作數(shù)據(jù)庫(kù)訪問(wèn)，其實(shí)有許多同事都建議最好不要采用，因?yàn)槲覀兤匠５臉I(yè)務(wù)處理中并沒(méi)有用到Jpa的額外的方法；
3、而且我也找了一篇文章提到了關(guān)于對(duì)JpaRepository的一些看法，鏈接地址為 http://jtuts.com/2014/08/26/difference-between-crudrepository-and-jparepository-in-spring-data-jpa;
4、而本章節(jié)我們僅僅只是講解了一下如何集成操作Mysql數(shù)據(jù)庫(kù)，采用JpaRepository來(lái)訪問(wèn)而已，不涉及什么深層次的業(yè)務(wù)；
5、另外配置文件中的mysql數(shù)據(jù)庫(kù)配置，那么就得大家自己用自己的了哈；

Mysql數(shù)據(jù)庫(kù)安裝步驟

    4.0.0

    springms-provider-user-mysql-jparepository
    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
        
    

server:
  port: 8310
spring:
  application:
    name: springms-provider-user-mysql-jparepository  #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.repository;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

import com.springms.cloud.entity.User;

@Repository
public interface UserRepository extends JpaRepository {

}

package com.springms.cloud.entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@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.controller;

import com.springms.cloud.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import com.springms.cloud.entity.User;

import java.util.List;

/**
 * 用戶微服務(wù)Controller。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 17/10/18
 *
 */
@RestController
public class ProviderUserMysqlController {

    @Autowired
    private UserRepository userRepository;

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

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

    /**
     * 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);

        return userRepository.save(user);
    }
}

package com.springms.cloud;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * 鏈接Mysql數(shù)據(jù)庫(kù),通過(guò)JpaRepository編寫數(shù)據(jù)庫(kù)訪問(wèn)。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 17/10/18
 *
 */
@SpringBootApplication
public class MsProviderUserMysqlApplication {

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

/****************************************************************************************
 一、鏈接Mysql數(shù)據(jù)庫(kù),通過(guò)JpaRepository編寫數(shù)據(jù)庫(kù)訪問(wèn)：

 1、啟動(dòng) springms-provider-user-mysql-jparepository 模塊服務(wù)，啟動(dòng)1個(gè)端口；
 2、在瀏覽器輸入地址 http://localhost:8310/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；
 ****************************************************************************************/

https://gitee.com/ylimhhmily/SpringCloudTutorial.git

SpringCloudTutorial交流QQ群: 235322432

SpringCloudTutorial交流微信群: 微信溝通群二維碼圖片鏈接

歡迎關(guān)注，您的肯定是對(duì)我最大的支持!!!