云尚办公-0.2.0

news2025/1/18 7:24:02

4. service层

MyBatisPlus封装了service层，只需要继承IService接口即可。并且MyBatisPlus实现了提供了接口的实现类。

package pers.beiluo.yunshangoffice.service;

import com.baomidou.mybatisplus.extension.service.IService;
import pers.beiluo.yunshangoffice.model.system.SysRole;

public interface SysRoleService extends IService<SysRole> {
}

package pers.beiluo.yunshangoffice.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.stereotype.Service;
import pers.beiluo.yunshangoffice.mapper.SysRoleMapper;
import pers.beiluo.yunshangoffice.model.system.SysRole;
import pers.beiluo.yunshangoffice.service.SysRoleService;

@Service
public class SysRoleServiceImpl extends ServiceImpl<SysRoleMapper, SysRole> implements SysRoleService{
    
    //在ServiceImpl中已经完成了mapper的注入
    //    @Autowired
    //    protected M baseMapper;

}

//测试类
package pers.beiluo.yunshangoffice;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import pers.beiluo.yunshangoffice.model.system.SysRole;
import pers.beiluo.yunshangoffice.service.SysRoleService;

import java.util.List;

@SpringBootTest
public class SysRoleServiceTest {

    @Autowired
    private SysRoleService sysRoleService;

}

4.1 查询测试

    //这里要注意，@MapperScan注解扫描位置要精确到mapper所在的包，不能写上一层或更上层的包，否则会报错
    @Test
    public void getAllTest(){
        List<SysRole> list = sysRoleService.list();
        list.forEach(System.out::println);
    }

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4.2 添加测试

    @Test
    public void insertTest(){
        SysRole sysRole = new SysRole();
        sysRole.setRoleName("角色管理员2");
        sysRole.setRoleCode("role");
        sysRole.setDescription("角色管理员2");

        boolean save = sysRoleService.save(sysRole);
        System.out.println(save);
        System.out.println(sysRole);
    }

在这里插入图片描述

4.3 修改测试

    @Test
    public void updateTest(){
        SysRole sysRole = new SysRole();
        sysRole.setId(10L);
        sysRole.setRoleCode("roleee");

        boolean b = sysRoleService.updateById(sysRole);
        System.out.println(b);
    }

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4.4 删除测试

//根据id删除
    @Test
    public void deleteByIdTest(){
        boolean b = sysRoleService.removeById(10);
        System.out.println(b);
    }

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//批量删除
    @Test
    public void deleteBatchTest(){
        boolean b = sysRoleService.removeByIds(Arrays.asList(2, 9));
        System.out.println(b);
    }

在这里插入图片描述

4.5 条件查询

    @Test
    public void selectTest(){
//        QueryWrapper<SysRole> sysRoleQueryWrapper = new QueryWrapper<>();
//        sysRoleQueryWrapper.eq("role_code", "roleee");
        LambdaQueryWrapper<SysRole> sysRoleQueryWrapper = new LambdaQueryWrapper<>();
        sysRoleQueryWrapper.eq(SysRole::getRoleCode,"roleee");
        List<SysRole> list = sysRoleService.list(sysRoleQueryWrapper);
        list.forEach(System.out::println);
    }