SpringCloud（第 001 篇）簡(jiǎn)單用戶微服務(wù)

zombieda 發(fā)布于2019-08-16 10:47 / 1327人閱讀

摘要：第篇簡(jiǎn)單用戶微服務(wù)一大致介紹通過(guò)接口來(lái)簡(jiǎn)單獲取數(shù)據(jù)庫(kù)中的用戶信息，并且數(shù)據(jù)庫(kù)中的字段與實(shí)體類的字段相互映射。添加簡(jiǎn)單用戶微服務(wù)啟動(dòng)類簡(jiǎn)單用戶微服務(wù)類。

SpringCloud（第 001 篇）簡(jiǎn)單用戶微服務(wù)

一、大致介紹

通過(guò) RestAPI 接口 /simple/{id} 來(lái)簡(jiǎn)單獲取 H2 數(shù)據(jù)庫(kù)中的用戶信息，并且數(shù)據(jù)庫(kù)中的字段與實(shí)體 User 類的字段相互映射 。

二、實(shí)現(xiàn)步驟 2.1 添加 maven 引用包



    4.0.0

    springms-simple-provider-user
    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
        

        
        
            com.h2database
            h2
            runtime
        

        
        
            org.springframework.boot
            spring-boot-starter-data-solr

2.2 添加應(yīng)用配置文件（springms-simple-provider-usersrcmainresourcesapplication.yml）

server:
  port: 8000
spring:
  application:
    name: springms-simple-provider-user  #全部小寫(xiě)
  jpa:
    generate-ddl: false
    show-sql: true
    hibernate:
      ddl-auto: none
  datasource:
    platform: h2
    schema: classpath:schema.sql
    data: classpath:data.sql
logging:
  level:
    root: INFO
    org.hibernate: INFO
    org.hibernate.type.descriptor.sql.BasicBinder: TRACE
    org.hibernate.type.descriptor.sql.BasicExtractor: TRACE
    com.springms: DEBUG

2.3 添加 H2 數(shù)據(jù)庫(kù)腳本（springms-simple-provider-usersrcmainresourcesschema.sql）

drop table user if exists;

CREATE TABLE USER(
    id BIGINT GENERATED by default as identity,
    username VARCHAR(40),
    name VARCHAR(20),
    age int(3),
    balance DECIMAL(10, 2),
    PRIMARY KEY(id)
);

2.4 插入 H2 數(shù)據(jù)庫(kù)一些初始化數(shù)據(jù)（springms-simple-provider-usersrcmainresourcesdata.sql）

INSERT into user (id, username, name, age, balance) values (1, "user1", "張三", 20, 100.00);
INSERT into user (id, username, name, age, balance) values (2, "user2", "李四", 22, 100.00);
INSERT into user (id, username, name, age, balance) values (3, "user3", "王五", 24, 100.00);
INSERT into user (id, username, name, age, balance) values (4, "user4", "趙六", 26, 100.00);
INSERT into user (id, username, name, age, balance) values (5, "user5", "李逵", 27, 100.00);
INSERT into user (id, username, name, age, balance) values (6, "user6", "張遠(yuǎn)", 10, 100.00);
INSERT into user (id, username, name, age, balance) values (7, "user7", "迪拜", 60, 100.00);
INSERT into user (id, username, name, age, balance) values (8, "user8", "哈士奇", 40, 100.00);
INSERT into user (id, username, name, age, balance) values (9, "user9", "關(guān)羽", 30, 100.00);

2.5 添加訪問(wèn)底層數(shù)據(jù)模型的DAO接口（springms-simple-provider-usersrcmainjavacomspringmscloudrepositoryUserRepository.java）

package com.springms.cloud.repository;

import com.springms.cloud.entity.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserRepository extends JpaRepository {

}

2.6 添加實(shí)體用戶類User（springms-simple-provider-usersrcmainjavacomspringmscloudentityUser.java）

package com.springms.cloud.entity;

import java.math.BigDecimal;

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 Short age;

  @Column
  private BigDecimal 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 Short getAge() {
    return this.age;
  }

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

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

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

2.7 添加用戶Web訪問(wèn)層Controller（springms-simple-provider-usersrcmainjavacomspringmscloudcontrollerMsSimpleProviderUserController.java）

package com.springms.cloud.controller;

import com.springms.cloud.entity.User;
import com.springms.cloud.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;

/**
 * 用戶微服務(wù)Controller。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017/9/17
 *
 */
@RestController
public class MsSimpleProviderUserController {

    @Autowired
    private UserRepository userRepository;

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

2.8 添加簡(jiǎn)單用戶微服務(wù)啟動(dòng)類（springms-simple-provider-usersrcmainjavacomspringmscloudMsSimpleProviderUserApplication.java）

package com.springms.cloud;

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

/**
 * 簡(jiǎn)單用戶微服務(wù)類。
 *
 * @author hmilyylimh
 *
 * @version 0.0.1
 *
 * @date 2017/9/17
 *
 */
@SpringBootApplication
public class MsSimpleProviderUserApplication {

    public static void main(String[] args) {
        SpringApplication.run(MsSimpleProviderUserApplication.class, args);
        System.out.println("【【【【【【 簡(jiǎn)單用戶微服務(wù) 】】】】】】已啟動(dòng).");
    }
}

三、測(cè)試

/****************************************************************************************
 一、簡(jiǎn)單用戶微服務(wù)接口測(cè)試：

 1、啟動(dòng) springms-simple-provider-user 模塊服務(wù)，啟動(dòng)1個(gè)端口；
 2、在瀏覽器輸入地址 http://localhost:8000/simple/1 可以看到信息成功的被打印出來(lái)。；
 ****************************************************************************************/

四、下載地址

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

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