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博客园 - Neonuu

解决ollama官方下载过慢的问题(包含windows和linux) 使用java 命令运行包含main方法的class文件时,报 Error: Could not find or load main class Test Java8 list.stream()常用方法 IDEA整合SVN VUE,编辑详情时,列表数据也跟着改变 VUE二级联动,改变一级下拉框,清空二级下拉框 MySQL面试题 JVM原理 Linux服务器安装MariaDB数据库 jar包解压后,修改完配置文件,再还原成jar包 Java获取resources文件夹下properties配置文件 Java中synchronized,wait(),notify() Java中Runnable和Thread的区别(网上部分说法是错误的) JPA中getOne与findOne try catch与spring的事务回滚 Spring主动触发事务回滚 Redis五种数据类型及应用场景 Java面试题 SQL HAVING用法详解 const,var,let区别
Java中如何实现一个接口拥有多个实现类
Neonuu · 2021-08-10 · via 博客园 - Neonuu

1、接口

public interface OrdinaryService {
    JsonData queryByKeywordPagination(Integer page, Integer counts,Object parameter[]);
}

2、实现类

@Service("maintenanceService")
public class MaintenanceServiceImpl implements MaintenanceService, OrdinaryService {
    @Override
    public JsonData queryByKeywordPagination(Integer page, Integer counts, Object[] parameter) {
        return null;
    }
}
@Service("inspectionService")
public class InspectionServiceImpl implements InspectionService,OrdinaryService  {
    @Override
    public JsonData queryByKeywordPagination(Integer page, Integer counts, Object[] parameter) {
        return null;
    }
}

3、根据不同的条件调用不同的实现

方法一

@Resource(name="maintenanceService")
OrdinaryService maintenanceService;
    
@Resource(name="inspectionService")
OrdinaryService inspectionService;

方法二

@Autowired
@Qualifier("maintenanceService")
OrdinaryService maintenanceService;
 
@Autowired
@Qualifier("inspectionService")
OrdinaryService inspectionService;