springcloud搭建（三）服務提供者

1.引入依賴jar包

<dependencies>
      <dependency>
          <groupId>com.java1234.springcloud</groupId>
          <artifactId>microservice-common</artifactId>
         <version>${project.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
    </dependency>
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid</artifactId>
    </dependency>
    <!-- 修改後立即生效，熱部署 -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>springloaded</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
    </dependency>
  </dependencies>

2.加入連接池配置文件application.yml：

server:
  port: 1001
  context-path: /
 
# 數據源配置
spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/db_springcloud
    username: root
    password: 123456
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true

3.創建dao層：

package com.java1234.repository;

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;

import com.java1234.entity.Student;

/**
 * 學生Repository接口
 * @author Administrator
 *
 */
public interface StudentRepository extends JpaRepository<Student, Integer>,JpaSpecificationExecutor<Student>{

}

4.service層：

package com.java1234.service;
 
import java.util.List;
 
import com.java1234.entity.Student;
 
/**
 * 學生信息Service接口
 * @author Administrator
 *
 */
public interface StudentService {
 
    /**
     * 添加或者修改學生信息
     * @param student
     */
    public void save(Student student);
     
    /**
     * 根據id查找學生信息
     * @param id
     * @return
     */
    public Student findById(Integer id);
     
    /**
     * 查詢學生信息
     * @return
     */
    public List<Student> list();
     
    /**
     * 根據id刪除學生信息
     * @param id
     */
    public void delete(Integer id);
     
     
}





package com.java1234.service.impl;
 
import java.util.List;
 
import javax.annotation.Resource;
 
import org.springframework.stereotype.Service;
 
import com.java1234.entity.Student;
import com.java1234.repository.StudentRepository;
import com.java1234.service.StudentService;
 
/**
 * 學生信息Service實現類
 * @author Administrator
 *
 */
@Service("studentService")
public class StudentServiceImpl implements StudentService{
 
    @Resource
    private StudentRepository studentRepository;
     
    @Override
    public void save(Student student) {
        studentRepository.save(student);
    }
 
    @Override
    public Student findById(Integer id) {
        return studentRepository.findOne(id);
    }
 
    @Override
    public List<Student> list() {
        return studentRepository.findAll();
    }
 
    @Override
    public void delete(Integer id) {
        studentRepository.delete(id);
    }
 
}

5.controller層：

package com.java1234.controller;
 
import java.util.List;
 
import javax.annotation.Resource;
 
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
 
import com.java1234.entity.Student;
import com.java1234.service.StudentService;
 
/**
 * 服務提供者-學生信息控制器
 * @author Administrator
 *
 */
@RestController
@RequestMapping("/student")
public class StudentProviderController {
 
    @Resource
    private StudentService studentService;
     
    /**
     * 添加或者修改學生信息
     * @param student
     * @return
     */
    @PostMapping(value="/save")
    // 自定義實體類需要加上@RequestBody，否則收到數據爲null
    public boolean save(@RequestBody Student student){
        try{
            studentService.save(student);  
            return true;
        }catch(Exception e){
            return false;
        }
    }
     
    /**
     * 查詢學生信息
     * @return
     */
    @GetMapping(value="/list")
    public List<Student> list(){
        return studentService.list();
    }
     
    /**
     * 根據id查詢學生信息
     * @return
     */
    @GetMapping(value="/get/{id}")
    public Student get(@PathVariable("id") Integer id){
        return studentService.findById(id);
    }
     
    /**
     * 根據id刪除學生信息
     * @return
     */
    @GetMapping(value="/delete/{id}")
    public boolean delete(@PathVariable("id") Integer id){
        try{
            studentService.delete(id);
            return true;
        }catch(Exception e){
            return false;
        }
    }
}

 

6.最後創建啓動類：

package com.java1234;

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

@SpringBootApplication
public class StudentProviderApplication_1001 {

	public static void main(String[] args) {
		SpringApplication.run(StudentProviderApplication_1001.class, args);
	}
}