在构造方法里获取当前类的泛型

定义

public class MyClass<T> {

    private Class<T> clazz;

    public MyClass() {
        Type type = this.getClass().getGenericSuperclass();
        if (type instanceof ParameterizedType parameterizedType) {
            if (parameterizedType.getActualTypeArguments() != null && parameterizedType.getActualTypeArguments().length > 0) {
                this.clazz = (Class<T>) parameterizedType.getActualTypeArguments()[0];
            }
        }
    }

    public String getGenericTypeName() {
        return this.clazz.getName();
    }

}

子类

public class MyStringClass extends MyClass<String> {
}

验证

    @Test
    void test() {
        MyStringClass myClass = new MyStringClass();
        System.out.println(myClass.getGenericTypeName());
    }

输出：java.lang.String