今天整合了springboot+springdata-jpa+vue+swagger ui2+axios實現前後端分離寫了一套增刪改查,分頁。希望可以給初學者一些幫助。
後端(idea中SpringBoot項目)
配置文件 application.yml
#springboot數據源
spring:
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
url: jdbc:mysql://localhost:3306/studentjpa?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC
password: root
username: root
#配置spring-data-jpa
jpa:
show-sql: true #控制檯輸出sql語句
database: mysql #jpa使用的數據庫
hibernate:
ddl-auto: update
naming:
physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
server:
port: 8081
SpringBoot整合Swagger-ui 引入依賴
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.9.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.springfox/springfox-swagger-ui -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.9.2</version>
</dependency>
SpringdatajpaApplication類
package com.changan.springdatajpa;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import springfox.documentation.swagger2.annotations.EnableSwagger2;
@SpringBootApplication
/*開啓swaggerUI 的註解*/
@EnableSwagger2
public class SpringdatajpaApplication {
public static void main(String[] args) {
SpringApplication.run(SpringdatajpaApplication.class, args);
}
}
entity(實體類)
package com.changan.springdatajpa.entity;
import lombok.Data;
import javax.persistence.*;
@Data
/*對應數據庫中的表*/
@Table(name = "student")
@Entity
public class Student {
/*Id表示主鍵 主鍵有生成策略GenerationType.IDENTITY*/
/*GenerationType.AUTO*/
/*Oracle中是沒有自動增長的 設置SEQUENCE 使用序列進行增長*/
/*GeneratedValue 自動增長生成的value值*/
@Id
@GeneratedValue(strategy= GenerationType.IDENTITY)
private Integer id;
@Column(name = "name",columnDefinition = "varchar(25) comment '姓名'")
private String name;
@Column
private String sex;
private Integer gradeId;
}
Service層(實現層)的接口和類
service接口
package com.changan.springdatajpa.service;
import com.changan.springdatajpa.entity.Student;
import org.springframework.data.domain.Page;
import java.util.List;
public interface StudentService {
/**
* 新增學生信息
* @param student
* @return
*/
Student save(Student student);
/**
* 查詢所有信息
* @return
*/
List<Student> findAll();
/**
* 修改學生信息
* @param student
* @return
*/
Student update(Student student);
/**
* 刪除學生信息
* @param id
*/
void delete(Integer id);
/**
* 分頁查詢
* @param page
* @param size
* @return
*/
Page<Student> findByPage(Integer page,Integer size);
/**
* 查詢前兩行
* @return
*/
List<Student> findTop();
/**
* 根據id查詢
* @param id
* @return
*/
Student findById(Integer id);
/**
* 根據姓名模糊查詢
* @param name
* @return
*/
List<Student> findLikeName(String name);
/**
* 根據姓名模糊查詢
* @param name
* @return
*/
List<Student> findByName(String name);
}
Impl實現類
package com.changan.springdatajpa.service.impl;
import com.changan.springdatajpa.dao.StudentDao;
import com.changan.springdatajpa.entity.Student;
import com.changan.springdatajpa.service.StudentService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class StudentServiceImpl implements StudentService {
@Autowired
private StudentDao studentDao;
/**
* 新增學生信息
* @param student
* @return
*/
@Override
public Student save(Student student) {
Student s = studentDao.save(student);
return s;
}
/**
* 查詢所有信息
* @return
*/
@Override
public List<Student> findAll() {
return studentDao.findAll();
}
/**
* 修改學生信息
* @param student
* @return
*/
@Override
public Student update(Student student) {
Student s = studentDao.save(student);
return s;
}
/**
* 刪除學生信息
* @param id
*/
@Override
public void delete(Integer id) {
studentDao.deleteById(id);
}
/**
* 分頁查詢
* @param page
* @param size
* @return
*/
@Override
public Page<Student> findByPage(Integer page,Integer size) {
PageRequest of = PageRequest.of(page, size);
Page<Student> pages = studentDao.findAll(of);
return pages;
}
/**
* 查詢前兩行信息
* @return
*/
@Override
public List<Student> findTop() {
return studentDao.findTop2By();
}
/**
* 根據Id查詢
* @param id
* @return
*/
@Override
public Student findById(Integer id) {
return studentDao.findById(id).get();
}
/**
* 根據姓名模糊查詢
* @param name
* @return
*/
@Override
public List<Student> findLikeName(String name) {
return studentDao.findByNameContaining(name);
}
/**
* 根據姓名模糊查詢
* @param name
* @return
*/
@Override
public List<Student> findByName(String name) {
return studentDao.findByName(name);
}
}
Dao(數據訪問層)接口
package com.changan.springdatajpa.dao;
import com.changan.springdatajpa.entity.Student;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import java.util.List;
public interface StudentDao extends JpaRepository<Student,Integer> {
/**
* 查詢前兩行
* @return
*/
List<Student> findTop2By();
/**
* 根據姓名模糊查詢
* @param name
* @return
*/
List<Student> findByNameContaining(String name);
//select * form student where name like %name% or sex='' and gradeId = '';
//List<Student> findByNameContainingOrSexAndGradeId();
/**
* 根據姓名模糊查詢
* @param name
* @return
*/
@Query(value = "select * from Student where name like concat('%',?,'%') ",nativeQuery = true)
List<Student> findByName(String name);
}
Controller(控制層)類
package com.changan.springdatajpa.controller;
import com.changan.springdatajpa.dao.StudentDao;
import com.changan.springdatajpa.entity.Student;
import com.changan.springdatajpa.service.StudentService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.models.auth.In;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.web.bind.annotation.*;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@RestController
@RequestMapping("/api")
@Api(value = "swagger ui 註釋 api 級別")
//@Controller+@ResponseBody 以json數據進行返回
public class StudentController{
@Autowired
private StudentService studentService;
@Autowired
private StudentDao studentDao;
/*restful風格實現*/
@ApiOperation(value = "新增學生信息",notes = "新增學生信息")
@PostMapping("/save")
//@RequestMapping(method = RequestMethod.POST)
public Student save(@RequestBody Student student){
return studentService.save(student);
}
@ApiOperation(value = "查詢學生信息",notes = "查詢學生信息")
@GetMapping("/student")
public List<Student> findAll(){
return studentService.findAll();
}
@ApiOperation(value = "刪除學生信息",notes = "刪除學生信息")
@DeleteMapping("delete")
public int delete(Integer id){
try {
studentService.delete(id);
return 1;
} catch (Exception e){
e.printStackTrace();
return 0;
}
}
@ApiOperation(value = "修改學生信息",notes = "修改學生信息")
@PutMapping("/update")
public Student update(@RequestBody Student student){
return studentService.update(student);
}
@ApiOperation(value = "分頁查詢學生信息",notes = "分頁查詢學生信息")
@GetMapping("/findByPage")
public Page<Student> findByPage(Integer page,Integer size){
Page<Student> students = studentService.findByPage(page, size);
return students;
}
@ApiOperation(value = "查詢前兩行學生信息",notes = "查詢前兩行學生信息")
@GetMapping("/findtop")
public List<Student> findTop(){
return studentService.findTop();
}
@ApiOperation(value = "根據Id查詢學生信息",notes = "根據Id查詢學生信息")
@GetMapping("/findById")
public Student findById(Integer id){
return studentService.findById(id);
}
@ApiOperation(value = "根據姓名查詢學生信息",notes = "根據Id查詢學生信息")
@GetMapping("/findLikeName")
public List<Student> findLikeName(String name){
return studentService.findLikeName(name);
}
@ApiOperation(value = "根據姓名查詢學生信息",notes = "根據Id查詢學生信息")
@GetMapping("/findByName")
public List<Student> findByName(String name){
return studentService.findByName(name);
}
}
config
SwaggerConfig類
package com.changan.springdatajpa.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.ApiInfo;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;
@Configuration
@EnableSwagger2
public class SwaggerConfig {
@Bean
public Docket createRestApi() {
return new Docket(DocumentationType.SWAGGER_2)
.apiInfo(apiInfo())
.select()
.apis(RequestHandlerSelectors.basePackage("com.changan.springdatajpa.controller"))
.paths(PathSelectors.any())
.build();
}
private ApiInfo apiInfo() {
return new ApiInfoBuilder()
.title("Spring Boot中使用Swagger2實現前後端分離開發")
.description("此項目只是練習如何實現前後端分離開發的小Demo")
.termsOfServiceUrl("https://blog.csdn.net/ca1993422")
.contact("宋政宏")
.version("1.0")
.build();
}
}
運行前往https://swagger.io/tools/swagger-ui/ Swagger官網
訪問
使用其一種方法測試(此處選擇delete刪除)
成功!
前端
導入vue.js,axios.js
進入BootCDN官網:https://www.bootcdn.cn/ 查找vue.js網絡路徑。
進入Axios文檔 https://www.kancloud.cn/yunye/axios/234845 查找axios.js網絡路徑。
<!-- 通過CDN引入Vue.js -->
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<!-- 通過CDN引入axios -->
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
js代碼
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
student: {
id: '',
name: '',
sex: '',
gradeId: ''
},
students: []
},
methods: {
/* findAll: function(page) {
var _this = this;
axios.get('http://localhost:8082/api/findByPage',{
params:{
page : page,
size : '3'
}
})
.then(function(response) {
_this.students = response.data;
})
.catch(function(error) {
console.log(error);
});
}, */
//分頁查詢
findByPage:function(page,size){
axios.get('http://localhost:8082/api/findByPage', {
params: {
page:page,
size:size,
}
})
.then((response) => {
this.students = response.data;
})
.catch(function(error) {
console.log(error);
});
},
//調用分頁查詢方法
pgup:function(page){
this.findByPage(page,2);
},
//新增和修改信息
Save: function(page) {
var _this = this;
var student = JSON.stringify(_this.student)
if (student.id != null && student.id != '') { //修改
axios.put('http://localhost:8082/api/update', student, {
headers: {
"Content-Type": "application/json;charset=utf-8" //頭部信息
}
})
.then(function(response) {
//保存完之後查詢所有的信息
this.cleanstudent();
this.pgup(page)
})
.catch(function(error) {
console.log(error);
});
} else { //新增
axios.post('http://localhost:8082/api/save', student, {
headers: {
"Content-Type": "application/json;charset=utf-8" //頭部信息
}
})
.then(function(response) {
//保存完之後查詢所有的信息
if (_this.student.id != null) {
_this.student.id = null;
}
this.cleanstudent();
this.pgup(page)
})
.catch(function(error) {
console.log(error);
});
}
},
//刪除信息
Delete: function(id,page) {
var _this = this;
axios.delete('http://localhost:8082/api/delete', {
params: {
id: id
}
})
.then(function(response) {
this.cleanstudent();
this.pgup(page)
})
.catch(function(error) {
console.log(error);
});
},
Edit: function(student) {
this.student = student;
},
cleanstudent:function(){
this.student.id = null;
this.student.name = null;
this.student.sex = null;
this.student.gradeId = null;
}
},
//創建
created: function() { //創建vue對象的時候自動調用查詢所有的方法
this.findByPage(0,2);
}
})
</script>
html代碼
<div id="app">
<table border="1" cellspacing="0" cellpadding="5">
<tr>
<th>編號</th>
<th>姓名</th>
<th>性別</th>
<th>年級</th>
<th>操作</th>
</tr>
<template v-for="student in students.content">
<tr>
<td>{{student.id}}</td>
<td>{{student.name}}</td>
<td>{{student.sex}}</td>
<td>{{student.gradeId}}</td>
<td>
<a href="#" @click="Delete(student.id,students.number)">刪除</a>
<a href="#" @click="Edit(student)">編輯</a>
</td>
</tr>
</template>
<template>
<tr>
<td><a href="#" @click="pgup(0)">首頁</a></td>
<td><a href="#" @click="pgup(students.number-1)" v-if="students.number>0">上一頁</a></td>
<td><a href="#" @click="pgup(students.number+1)" v-if="students.number<students.totalPages-1">下一頁</a></td>
<td><a href="#" @click="pgup(students.totalPages-1)">尾頁</a></td>
<td>當前頁<label>{{students.number+1}}</label></td>
</tr>
</template>
<template>
<tr>
<td><input type="text" placeholder="不需要自己填充" readonly="readonly" v-model="student.id" /></td>
<td><input type="text" placeholder="請輸入用戶名" v-model="student.name" /></td>
<td><input type="text" placeholder="請輸入性別" v-model="student.sex" /></td>
<td><input type="text" placeholder="請輸入年級" v-model="student.gradeId" /></td>
<td>
<button type="button" @click="Save(students.totalPages-1)">保存</button>
</td>
</tr>
</template>
</table>
</div>
</div>
運行項目測試會發現出現一個angularjs flask跨域問題 XMLHttpRequest cannot load. No 'Access-Control-Allow-Origin’的錯誤
簡單的處理方式是再後端idea中的SpringBoot項目config包下加一個WebMvcConfig.java類
WebMvcConfig.java代碼
package com.changan.springdatajpa.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.CorsRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
//ngnix反響代理實現跨域
//ngnix負載均衡 單點故障 數據庫單點故障 容災
//redis 主從複製 投票
//跨域配置
@Bean
public WebMvcConfigurer corsConfigurer() {
return new WebMvcConfigurer() {
@Override
//重寫父類提供的跨域請求處理的接口
public void addCorsMappings(CorsRegistry registry) {
//添加映射路徑
registry.addMapping("/**")
//放行哪些原始域
.allowedOrigins("*")
//是否發送Cookie信息
.allowCredentials(true)
//放行哪些原始域(請求方式)
.allowedMethods("GET", "POST", "PUT", "DELETE")
//放行哪些原始域(頭部信息)
.allowedHeaders("*")
//暴露哪些頭部信息(因爲跨域訪問默認不能獲取全部頭部信息)
.exposedHeaders("Header1", "Header2");
}
};
}
}
再運行項目就成功了!