javaweb各類框架組合案例(六)：springboot+spring data jpa（hibernate）+restful

1、介紹

1.springboot是spring項目的總結+整合

　　當咱們搭smm,ssh,ssjdbc等組合框架時，各類配置不勝其煩，不只是配置問題，在添加各類依賴時也是讓人頭疼，關鍵有些jar包之間還會出現衝突，讓你的項目出現難以解決的問題。基於這種狀況，springboot橫空出世，在考慮到Struts控制層框架有漏洞，springboot放棄（大多數企業一樣如此）了Struts，轉而代之是springMVC，不過，springboot是自動集成springMVC的，不須要任何配置，不須要任何依賴，直接使用各類控制層註解。springboot是springcloud的基礎，是開啓微服務時代的鑰匙。

 

2、新建springboot工程

1. 使用idea2019新建project，選擇spring Initializr，next

 

2. 填寫座標信息，next

 

 3. web選擇Spring Web Starter，SQL選擇Spring Data JPA、MySQL Driver，next

 

 

 4. 填寫項目名已經存放位置，finish

 

3、項目構建

1. pom.xml

　　springboot工程默認，包含spring-boot-starter-web、spring-boot-starter-test、spring-boot-starter-data-jpa以及mysql驅動

 

2. 業務實現

　　實現一個用戶擁有多部手機的業務

 

3. 配置文件

　　application.properties

########################################################
###數據庫鏈接信息
########################################################
#鏈接地址
spring.datasource.url=jdbc:mysql://localhost:3306/springboot_data_jpa?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
#useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC　　設置時區，否則可能會報錯

#數據庫帳戶 
spring.datasource.username=root 
#數據庫密碼 
spring.datasource.password=root 
#數據庫驅動 
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver 
######################################################## 
### Java Persistence Api JPA相關配置 
######################################################## 
#指定數據庫類型 
spring.jpa.database=mysql 
#控制檯打印sql 
spring.jpa.show-sql=true 
#建表策略，這裏用update，即根據實體更新表結構 
spring.jpa.hibernate.ddl-auto=update 
#表中字段命名策略,這裏要引入hibernate的核心包，否則這個命名策略會報錯 
spring.jpa.hibernate.naming.implicit-strategy=org.hibernate.boot.model.naming.ImplicitNamingStrategyLegacyJpaImpl 
spring.jpa.hibernate.naming.physical-strategy=org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl 
spring.jpa.hibernate.naming.strategy=org.hibernate.cfg.ImprovedNamingStrategy 
#方言 
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5Dialect

 

4. entity實體類

package club.xcreeper.springboot_spring_data_jpa.entity;

import javax.persistence.*;

@Entity
@Table(name = "phone")
public class Phone {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    private String brand;

    public Integer getId() {
        return id;
    }

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

    public String getBrand() {
        return brand;
    }

    public void setBrand(String brand) {
        this.brand = brand;
    }

}

Phone

package club.xcreeper.springboot_spring_data_jpa.entity;

import javax.persistence.*;
import java.util.List;

@Entity
@Table(name = "user")
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    private String username;

    private String password;

    @OneToMany(targetEntity = Phone.class)
    @JoinColumn(name = "user_id")
    private List<Phone> phones;

    public List<Phone> getPhones() {
        return phones;
    }

    public void setPhones(List<Phone> phones) {
        this.phones = phones;
    }

    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;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

User

 

5. dao層

package club.xcreeper.springboot_spring_data_jpa.dao;

import club.xcreeper.springboot_spring_data_jpa.entity.User;
import org.springframework.data.jpa.repository.JpaRepository;

import java.io.Serializable;

public interface UserDao extends JpaRepository<User, Serializable> {
    User findByUsernameAndPassword(String username,String password);
}

 

6. service層

package club.xcreeper.springboot_spring_data_jpa.service;

import club.xcreeper.springboot_spring_data_jpa.entity.User;

public interface UserService {
    User findByUsernameAndPassword(String username,String password);
}

package club.xcreeper.springboot_spring_data_jpa.service.impl;

import club.xcreeper.springboot_spring_data_jpa.dao.UserDao;
import club.xcreeper.springboot_spring_data_jpa.entity.User;
import club.xcreeper.springboot_spring_data_jpa.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserDao userDao;

    @Override
    public User findByUsernameAndPassword(String username, String password) {
        return userDao.findByUsernameAndPassword(username,password);
    }
}

 

7. controller層

package club.xcreeper.springboot_spring_data_jpa.controller;

import club.xcreeper.springboot_spring_data_jpa.entity.User;
import club.xcreeper.springboot_spring_data_jpa.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    @GetMapping(value = "/getOne",params = {"username","password","username!=","password!="})//這裏屬性要用value而不能用name，name不起做用
    public User getUser(String username,String password) {
        return userService.findByUsernameAndPassword(username,password);
    }
}

 

8. 啓動程序後，數據庫表生成，須要添加數據

user表　　　　　　　　　　　　　　phone表

 

9. postman測試