基于SpringBoot的SSMP整合案例

 

  

 

 

标准输出 ：

 

 

 

 

 

package com.itheima.service;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.domain.Book;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
public class BookServiceTestCase {

    @Autowired
    private BookService bookService;

    @Test
    void testGetById(){
        System.out.println(bookService.getById(4));
    }

    @Test
    void testSave(){
        Book book = new Book();
        book.setType("测试数据123");
        book.setName("测试数据123");
        book.setDescription("测试数据123");
        bookService.save(book);
    }

    @Test
    void testUpdate(){
        Book book = new Book();
        book.setId(18);
        book.setType("测试数据abcdefg");
        book.setName("测试数据123");
        book.setDescription("测试数据123");
        bookService.update(book);
    }

    @Test
    void testDelete(){
        bookService.delete(16);
    }

    @Test
    void testGetAll(){
        bookService.getAll();
    }

    @Test
    void testGetPage(){
        IPage<Book> page = bookService.getPage(2, 5);
        System.out.println(page.getCurrent());
        System.out.println(page.getSize());
        System.out.println(page.getTotal());
        System.out.println(page.getPages());
        System.out.println(page.getRecords());
    }

}

 

 不要去覆盖原来的方法，留着后面如果有需要再用，我们用自己定义的

package com.itheima.service;

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.IService;
import com.itheima.domain.Book;

public interface IBookService extends IService<Book> {

    boolean saveBook(Book book);

    boolean modify(Book book);

    boolean delete(Integer id);

    IPage<Book> getPage(int currentPage, int pageSize);

    IPage<Book> getPage(int currentPage, int pageSize, Book book);

}

package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.dao.BookDao;
import com.itheima.domain.Book;
import com.itheima.service.IBookService;
import org.apache.logging.log4j.util.Strings;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class BookServiceImpl extends ServiceImpl<BookDao, Book> implements IBookService {

    @Autowired
    private BookDao bookDao;

    @Override
    public boolean saveBook(Book book) {
        return bookDao.insert(book) > 0;
    }

    @Override
    public boolean modify(Book book) {
        return bookDao.updateById(book) > 0;
    }

    @Override
    public boolean delete(Integer id) {
        return bookDao.deleteById(id) > 0;
    }

    @Override
    public IPage<Book> getPage(int currentPage, int pageSize) {
        IPage page = new Page(currentPage,pageSize);
        bookDao.selectPage(page,null);
        return page;
    }

    @Override
    public IPage<Book> getPage(int currentPage, int pageSize, Book book) {
        LambdaQueryWrapper<Book> lqw = new LambdaQueryWrapper<Book>();
        lqw.like(Strings.isNotEmpty(book.getType()),Book::getType,book.getType());
        lqw.like(Strings.isNotEmpty(book.getName()),Book::getName,book.getName());
        lqw.like(Strings.isNotEmpty(book.getDescription()),Book::getDescription,book.getDescription());
        IPage page = new Page(currentPage,pageSize);
        bookDao.selectPage(page,lqw);
        return page;
    }
}

package com.itheima.service;

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.domain.Book;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;

@SpringBootTest
public class BookServiceTest {

    @Autowired
    private IBookService bookService;

    @Test
    void testGetById(){
        System.out.println(bookService.getById(4));
    }

    @Test
    void testSave(){
        Book book = new Book();
        book.setType("测试数据123");
        book.setName("测试数据123");
        book.setDescription("测试数据123");
        bookService.save(book);
    }

    @Test
    void testUpdate(){
        Book book = new Book();
        book.setId(17);
        book.setType("-----------------");
        book.setName("测试数据123");
        book.setDescription("测试数据123");
        bookService.updateById(book);
    }

    @Test
    void testDelete(){
        bookService.removeById(18);
    }

    @Test
    void testGetAll(){
        bookService.list();
    }

    @Test
    void testGetPage(){
        IPage<Book> page = new Page<Book>(2,5);
        bookService.page(page);
        System.out.println(page.getCurrent());
        System.out.println(page.getSize());
        System.out.println(page.getTotal());
        System.out.println(page.getPages());
        System.out.println(page.getRecords());
    }

}