SpringBoot-创建RESTful风格的 http接口访问jpa 来操作数据库

1.开发工具IDE:Intellij Idea，数据库mysql

2.开始开发

2.1项目目录清单：

2.2 pom.xml内容：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion>

<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>demo</name>
<description>Demo project for Spring Boot</description>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.6.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>

<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>

<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>

</project>

2.2 Person类代码：

package com.example.demo;

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

@Entity
public class Person {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long Id;
private String firstName;
private String lastName;

public void setId(long id) {
Id = id;
}

public void setFirstName(String firstName) {
this.firstName = firstName;
}

public void setLastName(String lastName) {
this.lastName = lastName;
}

public long getId() {

return Id;
}

public String getFirstName() {
return firstName;
}

public String getLastName() {
return lastName;
}
}

2.3PersonRepository接口代码：

package com.example.demo;

import org.springframework.data.repository.PagingAndSortingRepository;
import org.springframework.data.repository.query.Param;
import org.springframework.data.rest.core.annotation.RepositoryRestResource;
import org.springframework.stereotype.Repository;

import java.util.List;

@RepositoryRestResource(collectionResourceRel = "people",path = "people")//这个注解不是必须的，只是用来改变默认路径，如果去掉这行注解，默认路径就成*****/persons了
public interface PersonRepositroy extends PagingAndSortingRepository<Person,Long> {
List<Person> findByLastName(@Param("name")String name);

}

2.4application.properties 配置文件代码:

spring.datasource.url=jdbc:mysql://localhost:3306/你的数据库
spring.datasource.username=账号
spring.datasource.password=密码
spring.jpa.hibernate.ddl-auto=create

3.测试

3.1访问htpp://locaohost:8080/ 和http://localhost:8080/people 看一下

//http:localhost:8080 的返回
{
"_links" : {
"persons" : {
"href" : "http://localhost:8080/persons{?page,size,sort}",
"templated" : true
},
"profile" : {
"href" : "http://localhost:8080/profile"
}
}
}
//http://localhost:8080/people的返回
{
"_embedded" : {
"people" : [ ]
},
"_links" : {
"self" : {
"href" : "http://localhost:8080/people{?page,size,sort}",
"templated" : true
},
"profile" : {
"href" : "http://localhost:8080/profile/people"
},
"search" : {
"href" : "http://localhost:8080/people/search"
}
},
"page" : {
"size" : 20,
"totalElements" : 0,
"totalPages" : 0,
"number" : 0
}
}

3.2

$ curl -i -X POST -H "Content-Type:application/json" -d "{  \"firstName\" : \"Frodo\",  \"lastName\" : \"Baggins\" }" http://localhost:8080/people[/code] 
-i  显示响应的头文件信息

-X POST 表明发送的是post请求，用来 添加数据

-H “Content-Type:application/json” 设置请求内容为json格式的数据

-d “{ \”firstName\” : \”Frodo\”, \”lastName\” : \”Baggins\” }”  要发送的Json数据 ,\  为转义字符表明要保留引号

3.3 其他的自己测试吧，比如findByLastName等等