简介：
此项目是一个前后端分离的小demo,
开发工具：idea+微信小程序开发工具
前端：界面布局样式和js的跳转
后端：依靠SpringBoot的业务逻辑层
项目的码云地址：
微信开发工具的使用和代码的结构及其含义参考
后端业务逻辑的完成
1.数据库的创建
工具：Navicat
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2. dao层及其方法的实现
1>bookinfo的实例化，利用@Entity完成映射
@Entity
@Table(name = "bookinfo")
public class BookinfoEntity {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int bookId;
@Column
private String bookType;
@Column
private String bookName;
@Column
private int bookNum;
@Column
private int bookState;
public int getBookId() {
return bookId;
}
public void setBookId(int bookId) {
this.bookId = bookId;
}
public String getBookType() {
return bookType;
}
public void setBookType(String bookType) {
this.bookType = bookType;
}
public String getBookName() {
return bookName;
}
public void setBookName(String bookName) {
this.bookName = bookName;
}
public int getBookNum() {
return bookNum;
}
public void setBookNum(int bookNum) {
this.bookNum = bookNum;
}
public int getBookState() {
return bookState;
}
public void setBookState(int bookState) {
this.bookState = bookState;
}
}
bookinfoentity
2>bookstate的实例化
@Entity
@Table(name = "bookstate")
public class BookstateEntity {
@Id
private int bookState;
@Column
private String bookStateinfo;
public int getBookState() {
return bookState;
}
public void setBookState(int bookState) {
this.bookState = bookState;
}
public String getBookStateinfo() {
return bookStateinfo;
}
public void setBookStateinfo(String bookStateinfo) {
this.bookStateinfo = bookStateinfo;
}
}
bookstateEntity
3>利用repository实现对对象的持久化操作，是OO的真正实现
@Repository
public interface BookInfoRepository extends JpaRepository {
}
@Repository
public interface BookstateRepository extends JpaRepository {
}
3.service层的实现、
3.1 BookinfoService接口
package com.example.demo.service;
import com.example.demo.vo.BookinfoVo;
import java.util.List;
/**
* Author: wuhen
* Date: 2018/10/9
* Time: 20:40
*/
public interface BookinfoService {
//查询书籍
BookinfoVo findbookOne(Integer bookId);
//查询所有书籍
List findbookAll();
}
BookinfoService
3.2 接口的实现
package com.example.demo.service.impl;
import com.example.demo.entity.BookinfoEntity;
import com.example.demo.entity.BookstateEntity;
import com.example.demo.repository.BookinfoRepository;
import com.example.demo.repository.BookstateRepository;
import com.example.demo.service.BookinfoService;
import com.example.demo.util.BookConverter;
import com.example.demo.vo.BookinfoVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.ArrayList;
import java.util.List;
/**
* Author: wuhen
* Date: 2018/10/9
* Time: 20:48
*/
@Service
public class BookinfoServiceImpl implements BookinfoService {
@Autowired
private BookinfoRepository bookinfoRepository;
@Autowired
private BookstateRepository bookstateRepository;
BookConverter bookConverter=new BookConverter();
@Override
public BookinfoVo findbookOne(Integer bookId) {
BookinfoEntity bookinfoEntity= bookinfoRepository.findById(bookId).get();
BookstateEntity bookstateEntity = bookstateRepository.findById(bookinfoEntity.getBookState()).get();
BookinfoVo bookinfoVo;
bookinfoVo = bookConverter.convert(bookinfoEntity, BookinfoVo.class);
bookinfoVo.setBookStateinfo(bookstateEntity.getBookStateinfo());
return bookinfoVo;
}
@Override
public List findbookAll() {
List bookinfoEntitys=bookinfoRepository.findAll();
List bookinfoVos=new ArrayList<>();
for (BookinfoEntity bookinfoEntity:bookinfoEntitys)
{
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