@Configuration//表明这是一个配置类
public class WebConfig implements WebMvcConfigurer
{
            //自定义Stirng--->Pet的类型转换器
            @Override
            public void addFormatters(FormatterRegistry registry) {
                registry.addConverter(new Converter<String,Pet>() {
                    @Override
                    public Pet convert(String source)//这里的source就是对应要String--->Pet的string字符串
                    {
                        // 啊猫,3
                        if(!StringUtils.isEmpty(source)){
                            Pet pet = new Pet();
                            String[] split = source.split(",");
                            pet.setName(split[0]);
                            pet.setAge(Integer.parseInt(split[1]));
                            return pet;
                        }
                        return null;
                    }
                });
            }
};

@RestController
public class myController
{
    @GetMapping("/hello")
    //通过路径变量，占位符进行相同名字的区分
    public Map boss(Pet pet)
    {
        Map<String,Object> map = new HashMap<>();
        map.put("pet",pet);
        return map;
    }
}