<!-- 添加data jpa依赖 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency><dependency><groupId>org.hsqldb</groupId><artifactId>hsqldb</artifactId><scope>runtime</scope></dependency>

<?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.kevin</groupId><artifactId>boot</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>boot</name><description>Demo project for Spring Boot</description><!--spring-boot-starter-parent项目中继承以获得合理的默认值。父项目提供以下功能：Java 1.8作为默认的编译器级别。UTF-8源码编码。一个依赖管理部分，从春天启动依赖性继承POM，管理公共依赖的版本。这种依赖关系管理可以让您在自己的pom中使用这些依赖关系时忽略<version>标记。明智的 资源过滤。明智的插件配置（exec插件， Git提交ID和 阴影）。明智的资源过滤application.properties和application.yml 包括配置文件特定的文件（例如application-dev.properties和 application-dev.yml）--><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.0.2.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-web</artifactId></dependency><!-- 添加data jpa依赖 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency><dependency><groupId>org.hsqldb</groupId><artifactId>hsqldb</artifactId><scope>runtime</scope></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>

spring.jpa.hibernate.ddl-auto = create-drop

package com.kevin.boot.model;import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import java.io.Serializable;/*** @author pingan.yang* @program SpringBootJpa* @description* @create 2018-05-29 19:10*/
@Entity
public class User implements Serializable {@Id@GeneratedValueprivate int id;@Column(nullable = false)private String name;@Column(nullable = false)private int age;public User() {}public User (String name, int age) {this.name = name;this.age = age;}public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}
}

package com.kevin.boot.repository;import com.kevin.boot.model.User;
import org.springframework.data.jpa.repository.JpaRepository;import java.util.List;public interface UserRepository extends JpaRepository<User, Long> {User getUserById(int id);List<User> getUserByName(String name);}

package com.kevin.boot.controller;import com.kevin.boot.model.User;
import com.kevin.boot.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;import java.util.List;/*** @author kevin.yang* @program SpringBootJpa* @description* @create 2018-05-29 19:11*/
// RestController = Controller + ResponseBody
@RestController
public class UserController {@Autowiredprivate UserRepository userRepository;@RequestMapping("/saveUser")public String saveUser(@RequestParam("name") String name, @RequestParam("age") int age) {try {User user = new User(name, age);userRepository.save(user);} catch (Exception e) {e.printStackTrace();return "error";}return "save success";}@RequestMapping("/getUserById")public User getUserById(@RequestParam("id") int id) {return userRepository.getUserById(id);}@RequestMapping("/getAllUser")public List<User> getAllUser() {return userRepository.findAll();}
}