用IDEA搭建第一个SpringBoot+SpringData Jpa框架

本文纯属自己的一些摸索和实践，如有写的不好的地方欢迎大家一起讨论。

首先我们来创建一个maven项目。









创建java目录并将其变为Sources Root文件夹。





3.接下来配置pom.xml文件里的一些依赖

<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/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion>
<groupId>cn.atben</groupId>
<artifactId>sboot</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>sboot Maven Webapp</name>
<url>http://maven.apache.org</url>

<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.1.RELEASE</version>
</parent>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.39</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-thymeleaf -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
<version>1.4.0.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-jpa -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>1.5.1.RELEASE</version>
</dependency>
</dependencies>
<build>
<finalName>sboot</finalName>
</build>
</project>

4.配置application.properties配置文件，放在resources目录下。

server.port=8080
server.tomcat.uri-encoding=utf-8

#MySQL
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/test?characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=123

#Spring Data JPA
spring.jpa.database=MYSQL
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
# Naming strategy
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy
# stripped before adding them to the entity manager)
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

5.到此框架配置文件就结束了，没错，springboot最大的优点就是省去了繁琐的xml配置文件，接下来我们来写一个接口试试。

/**Sboot.java**/
package cn.atben.sboot.pojo;

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

/**
* Created by atben
* 2018-01-24 14:58
*/
@Entity
@Table(name = "sboot")
public class Sboot {
@Id
@GeneratedValue
private Integer id;

private String test1;

private String test2;

public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id = id;
}

public String getTest1() {
return test1;
}

public void setTest1(String test1) {
this.test1 = test1;
}

public String getTest2() {
return test2;
}

public void setTest2(String test2) {
this.test2 = test2;
}
}

/**SbootController**/
package cn.atben.sboot.controller;

import cn.atben.sboot.repository.SbootRepositoty;
import cn.atben.sboot.pojo.Sboot;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

/**
* Created by atben
* 2018-01-24 14:31
*/
@RestController
@EnableAutoConfiguration
public class SbootController {

@Autowired
private SbootRepositoty sbootRepositoty;

@RequestMapping(value = "/hi")
public String hi(){
return "hi!";
}

@GetMapping(value = "/list")
public List<Sboot> list(){
return sbootRepositoty.findAll();
}

@GetMapping(value = "/delete")
public int deletelist(int id){
sbootRepositoty.delete(id);
return 1;
}
}

/**SbootRepositoty**/
package cn.atben.sboot.repository;

import cn.atben.sboot.pojo.Sboot;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

/**
* Created by atben
* 2018-01-24 15:11
*/
@Repository
public interface SbootRepositoty extends JpaRepository<Sboot,Integer>{
}

由于springboot集成了tomcat，不需要讲程序打包部署到tomcat服务器，我们只需要写一个入口。

/**Entry**/
package cn.atben.sboot.configuration;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;

/**
* Created by atben
* 2018-01-24 15:36
* *项目启动入口，配置包根路径
*/
@SpringBootApplication
@ComponentScan(basePackages = "cn.atben")
public class Entry {
public static void main(String[] args) throws Exception {
SpringApplication.run(Entry.class, args);
}
}

/**JpaConfiguration**/
package cn.atben.sboot.configuration;

import org.springframework.boot.autoconfigure.domain.EntityScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
* Created by atben
* 2018-01-24 15:33
*/
@Order(Ordered.HIGHEST_PRECEDENCE)
@Configuration
@EnableTransactionManagement(proxyTargetClass = true)
@EnableJpaRepositories(basePackages = "cn.atben.sboot.repository")
@EntityScan(basePackages = "cn.atben.sboot.pojo")
public class JpaConfiguration {
@Bean
PersistenceExceptionTranslationPostProcessor persistenceExceptionTranslationPostProcessor(){
return new PersistenceExceptionTranslationPostProcessor();
}
}

到此框架搭建完成，找到Entry.java右键run，即可将程序跑起来了。