继承，接口，注入

最新推荐文章于 2023-08-28 17:41:21 发布

原创最新推荐文章于 2023-08-28 17:41:21 发布 · 221 阅读

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继承

extends

关键字

this
super
final

重写(Override)与重载(Overload)

xxx(重载){
    重写
}

多态

抽象类

public abstract class Employee{
    private String name;
    private String address;
    private int number;

    // 抽象方法
    public abstract double computePay();

    // 其余代码
}

接口

public interface IXlsdataRunService extends IService<XlsdataRun> {
    boolean inserDataBytBatch(List list);

}

@Service
public class XlsdataRunServiceImpl extends ServiceImpl<XlsdataRunMapper, XlsdataRun> implements IXlsdataRunService {

    @Override
    public boolean inserDataBytBatch(List list) {
        return this.baseMapper.inserDataBytBatch(list);
    }

}

一个接口多个实现类，指定实现类

@Qualifier

// 1
@Autowired
@Qualifier("XlsdataRunServiceImpl")
IXlsdataRunService iXlsdataRunService;

// 2
@Resource(name = "XlsdataRunServiceImpl/XlsdataRunSI")
IXlsdataRunService iXlsdataRunService;