Spring Data JPA进阶+ Swagger

作者: 一粒有梦想的痞老板 | 来源:发表于2018-09-29 00:12 被阅读0次

swagger的由来

随着互联网技术的发展，现在的网站架构基本都由原来的后端渲染，变成了：前端渲染、先后端分离的形态，
而且前端技术和后端技术在各自的道路上越走越远。
前端和后端的唯一联系，变成了API接口；API文档变成了前后端开发人员联系的纽带，变得越来越重要，
swagger就是一款让你更好的书写API文档的框架。

其他API文档工具

confluence
README.md
rap——API文档工具，阿里开发，rap2官网
swagger——API文档框架，swagger官网

实例

使用Spring DATA JAP原生方法
解析方法名创建查询的特性
通过注解和JPQL语句创建查询等综合操作，完成对SysUser类中的各种操作

使用方法（选了一种适度封装之后的）

在pom.xml中引入依赖

<dependency>
<groupId>com.spring4all</groupId>
<artifactId>swagger-spring-boot-starter</artifactId>
<version>1.8.0.RELEASE</version>
</dependency>

在应用主类中增加@EnableSwagger2Doc注解

@SpringBootApplication
@EnableSwagger2Doc
public class Springboot2Swagger2Application {
public static void main(String[] args) {
SpringApplication.run(Springboot2Swagger2Application.class, args);
}
}

默认情况下就能产生所有当前SpringMVC加载的请求映射文档
访问地址：hp://localhost:8080/swagger-ui.html
参数配置示例

swagger.enabled=true
swagger.title=spring-data-jpa module
swagger.description=Starter for swagger 2.x
swagger.license=Apache License, Version 2.0
swagger.licenseUrl=https://www.apache.org/licenses/LICENSE-2.0.html
swagger.termsOfServiceUrl=https://github.com/dyc87112/spring-boot-starter-swagger
swagger.contact.name=RanRan Tao
swagger.contact.url=https://www.jianshu.com/u/822585e5c69a
swagger.contact.email=16422802@qq.com
swagger.base-package=com.example.book.controller
swagger.base-path=/**
swagger.exclude-path=/error, /ops/**

SysUser实体类

package com.example.book.entity;

import lombok.Data;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import java.io.Serializable;

@Entity
@Data
public class SysUser implements Serializable {
    @Id
    @GeneratedValue
    private Long id;
    @Column(nullable = false)
    private String account;
    private  String password;
    private String nickname;
    private int fans;

    public SysUser(String account, String password, String nickname, int fans) {
        this.account = account;
        this.password = password;
        this.nickname = nickname;
        this.fans = fans;
    }
}

DAO接口 UserRepositry(正确的应该是UserRepository,代码里不小心写错了！)

package com.example.book.dao;

import com.example.book.entity.SysUser;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;

import java.util.List;

public interface UserRepositry extends JpaRepository<SysUser,Long> {
    SysUser findByAccount(String account);
     List<SysUser> findByFansBetween(Integer num1, Integer num2);
     List<SysUser> findByNicknameLike(String nickname);

    @Query("from SysUser u where u.nickname like CONCAT('%',:nickname,'%') order by u.fans desc ")
 List<SysUser> findUsers(@Param("nickname") String nickname);
}

DAO测试类

package com.example.book.dao;

import com.example.book.entity.SysUser;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

import javax.annotation.Resource;

import java.util.List;

@RunWith(SpringRunner.class)
@SpringBootTest
public class UserRepositryTest {
    @Resource
    private UserRepositry userRepositry;
@Test
    public void initData(){
    SysUser[] users={
            new SysUser("sdy@qq.com","111","素心若霞",247),
            new SysUser("yjj@qq.com","222","与君绝",283),
            new SysUser("ygkld@qq.com","333","一个快乐的退休俱乐部",1834),
    new SysUser("jrys@qq.com","444","孑然一身",732),
    new SysUser("yxyy@qq.com","555","诗心悠远",539)
    };
    for (int i=0;i<5;i++){
        userRepositry.save(users[i]);
    }
}
    @Test
 public void findOne() {
        SysUser user = userRepositry.findById(42L).get();
         System.out.println(user);
}

@Test
    public void findByFansBetween() {
        List<SysUser> sysUsers =userRepositry.findByFansBetween(200,300);
        sysUsers.forEach(sysUser -> System.out.println(sysUser));

    }

    @Test
    public void findByNicknameLike() {
        List<SysUser> sysUsers=userRepositry.findByNicknameLike("心");
        sysUsers.forEach(sysUser -> System.out.println(sysUser));
    }

    @Test
    public void findByAccount() {
    SysUser sysUser=userRepositry.findByAccount("sdy@qq.com");
        System.out.println(sysUser);
    }

    @Test
  public void findUsers() {
        List<SysUser> users = userRepositry.findUsers("心");
         users.forEach(sysUser -> System.out.println(sysUser)); }

}

Service接口

package com.example.book.service;

import com.example.book.entity.SysUser;

import java.util.List;

public interface UserService {
    SysUser save(SysUser sysUser);

    List<SysUser> getAll();

    SysUser getUser(Long id);
    List<SysUser> getUserfindByNicknameLike(String nickname);
    SysUser getUserfindByAccount(String account);
    List<SysUser> getUsersOrderByFans(String nickname);
}

Service层实现类

package com.example.book.service.Impl;


import com.example.book.dao.UserRepositry;
import com.example.book.entity.SysUser;
import com.example.book.service.UserService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.transaction.Transactional;
import java.util.List;

@Service
public class UserServiceImpl implements UserService {
    @Resource
    private UserRepositry userRepositry;

    @Override
    @Transactional
    public SysUser save(SysUser sysUser) {
        return userRepositry.save(sysUser);
    }

    @Override
    public List<SysUser> getAll() {
        return userRepositry.findAll();
    }

    @Override
 public SysUser getUser(Long id) {
        return userRepositry.findById(id).get();
        }

    @Override
    public List<SysUser> getUserfindByNicknameLike(String nickname){
        return userRepositry.findByNicknameLike(nickname);
    }
@Override
    public SysUser getUserfindByAccount(String account){
        return userRepositry.findByAccount(account);
}
    @Override
 public List<SysUser> getUsersOrderByFans(String nickname) {
        return userRepositry.findUsers(nickname);
    }
}

Controller

package com.example.book.controller;

import com.example.book.entity.SysUser;
import com.example.book.service.UserService;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.persistence.GeneratedValue;
import java.util.List;

@RestController
@RequestMapping(value = "/user")
public class UserController {
    @Resource
    private UserService userService;
    @GetMapping(value = "/all")
    public List<SysUser> getAll(){
        return userService.getAll();
    }
    @GetMapping("/{id}")
 public SysUser getUser(@PathVariable Long id) {
        return userService.getUser(id);
    }

    @GetMapping(value = "/{nickname}")
    public List<SysUser> getUserfindByNicknameLike(String nickname){
        return userService.getUserfindByNicknameLike(nickname);
    }
    @GetMapping(value = "/{account}")
    public SysUser getUserfindByAccount(String account){
        return  userService.getUserfindByAccount(account);
    }
    @GetMapping("/order")
    public List<SysUser> getUsersOrderByFans(@RequestParam String nickname) {
        return userService.getUsersOrderByFans(nickname);
        }
}

使用swagger生成在线接口文档

所有方法的截图

image.png
以getall方法获取所有信息的截图为例

image.png

使用swagger测试接口比利用postman更美观方便哦！

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Spring Data JPA进阶+ Swagger

swagger的由来

其他API文档工具

实例

使用方法（选了一种适度封装之后的）

SysUser实体类

DAO接口 UserRepositry(正确的应该是UserRepository,代码里不小心写错了！)

DAO测试类

Service接口

Service层实现类

Controller

使用swagger生成在线接口文档

使用swagger测试接口比利用postman更美观方便哦！

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