Spring Boot整合SpringJPA

Spring Boot整合SpringJPA

pom文件引入依赖

<parent>
        <groupId>org.springframework.bootgroupId>
        <artifactId>spring-boot-starter-parentartifactId>
        <version>1.4.2.RELEASEversion>
    parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-data-jpaartifactId>
        dependency>
        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
        dependency>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
    dependencies>

配置文件引入

spring.datasource.url=jdbc:mysql://localhost:3306/springboot
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

创建User实体类

package com.cc.springboot.entity;

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

@Entity(name = "users")
public class User {

    @Id
    @GeneratedValue
    private Integer id;
    @Column
    private String username;
    public Integer getId() {
        return id;
    }
    public void setId(Integer id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }


}

创建UserDao

package com.cc.springboot.dao;

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

import com.cc.springboot.entity.User;


public interface UserDao extends JpaRepository<User, Integer> {

}

创建IndexController

package com.cc.springboot.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.cc.springboot.dao.UserDao;
import com.cc.springboot.entity.User;

@RestController
public class IndexController {
    @Autowired
    private UserDao userDao;

    @RequestMapping("/index")
    public String index(Integer id) {

        User findUser = userDao.findOne(id);
        System.out.println(findUser.getUsername());
        return "success";
    }

}

启动项目

package com.cc.springboot.app;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.orm.jpa.EntityScan;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;

@ComponentScan(basePackages = { "com.cc.springboot.controller" })
@EnableJpaRepositories(basePackages = "com.cc.springboot.dao")
@EnableAutoConfiguration
@EntityScan(basePackages = "com.cc.springboot.entity")
// @SpringBootApplication
public class App {

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

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