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Spring-Data_Jpa

1、在pom.xml中加入：

   			
    
     org.springframework.boot
    			
    
     spring-boot-starter-data-jpa
    		
   		
   			
    
     mysql
    			
    
     mysql-connector-java
    		
   

引入spring-data-jpa和mysql驱动

2、修改配置文件

spring:  profiles:    active: dev  datasource:    driver-class-name: com.mysql.jdbc.Driver    url: jdbc:mysql://127.0.0.1:3306/chenjie    username: root    password: root  jpa:    hibernate:      ddl-auto: update    show-sql: true

3、新建实体类

package cn.edu.shu.ces_chenjie;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;@Entitypublic class Person {    @Id    @GeneratedValue    private Integer id;    private Integer age;    private String name;    public Person() {    }    public Integer getId() {        return id;    }    public void setId(Integer id) {        this.id = id;    }    public Integer getAge() {        return age;    }    public void setAge(Integer age) {        this.age = age;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    @Override    public String toString() {        return "Person{" +                "id=" + id +                ", age=" + age +                ", name='" + name + '\'' +                '}';    }}

4、新建类

PersonRepository

package cn.edu.shu.ces_chenjie;import org.springframework.data.jpa.repository.JpaRepository;import java.util.List;public interface PersonRepository extends JpaRepository
   
    {    public List
    
      findByName(String name); }
    
   

5、新建类（

@Transactional

使用到了事务）

package cn.edu.shu.ces_chenjie;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component;import javax.transaction.Transactional;@Componentpublic class PersonService {    @Autowired    private PersonRepository repository;    @Transactional    public void insertTwo(){        Person personA = new Person();        personA.setName("renbo");        personA.setAge(18);        repository.save(personA);        Person personB = new Person();        personB.setName("bobo");        personB.setAge(20);        repository.save(personB);    }}

6、新建类

package cn.edu.shu.ces_chenjie;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.web.bind.annotation.*;import java.util.List;@RestControllerpublic class PersonController {    @Autowired    private PersonRepository repository;    @Autowired    private PersonService personService;    @GetMapping("/persons")    public List
   
     personList(){        return repository.findAll();    }    @PostMapping()    public String personAdd(@RequestParam("age") Integer age,@RequestParam("name") String name){        Person person = new Person();        person.setAge(age);        person.setName(name);        return repository.save(person).toString();    }    @GetMapping("persons/{name}")    public List
    
      personListByName(@PathVariable("name")String name){        return repository.findByName(name);    }    @PostMapping("persons/two")    public void personTwo(){        personService.insertTwo();    }}
    
   

7、使用IDEA 自带的 Tools->Test RESTful web service工具或者chrome postman插件测试

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