选择在运行时注入哪种实现

用

@Component("implForRq1")

@Component("implForRq2")

然后将它们都注入并使用：

class Runner {    @Autowired @Qualifier("implForRq1")    private MyInterface runnerOfRq1;    @Autowired @Qualifier("implForRq2")    private MyInterface runnerOfRq2;    void run(int rq) {        switch (rq) { case 1: runnerOfRq1.run(); case 2: runnerOfRq2.run(); ...        }    }}...@AutowiredRunner runner;void run(int rq) {    runner.run(rq);}