spring boot jpa

2016-7-29 15:47| 发布者: zhangjf| 查看: 633| 评论: 0

摘要: spring boot 微型框架越来越流行，spring的顶级项目。boot微型框架讲究的使零配置。与XML配置说拜拜。一分钟创建的web服务。也是已经占市场35%。这也足以说明 spring boot 的魅力所在。此列子基于 boot jpa 。 ...

spring boot 微型框架越来越流行，spring的顶级项目。boot微型框架讲究的使零配置。与XML配置说拜拜。一分钟创建的web服务。也是已经占市场35%。这也足以说明 spring boot 的魅力所在。此列子基于 boot jpa 。

/**maven依赖*/
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>1.2.3.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.36</version>
</dependency>
/**application.properties*/
spring.datasource.url = jdbc:mysql://localhost:3306/test
spring.datasource.username = root
spring.datasource.password = tiger
spring.datasource.driverClassName = com.mysql.jdbc.Driver
# Show or not log for each sql query
spring.jpa.show-sql =true
# Hibernate ddl auto (create, create-drop, update)
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
/**实体*/
package com.tian.entity;
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.validation.constraints.NotNull;
@Entity
@Table(name = "t_user")
public class User implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
// The user email
@NotNull
private String email;
// The user name
@NotNull
private String name;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
/**接口*/
package com.tian.dao;
import org.springframework.data.repository.CrudRepository;
import org.springframework.transaction.annotation.Transactional;
import com.tian.entity.User;
@Transactional
public interface UserRepository extends CrudRepository<User, Long>{
public User findByEmail(String email);
}
/**控制器*/
package com.tian.boot;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.tian.dao.UserRepository;
import com.tian.entity.User;
@RestController
public class TianController {
@Autowired
private UserRepository userRepository;
@RequestMapping("/tian")
@ResponseBody
public String hello(){
User user=userRepository.findByEmail("zhangtian@163.com");
System.out.println(user);
return "applicationcontext";
}
public static void main(String[] args) {
SpringApplication.run(TianController.class, args);
}
}

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