Inferred type 'S' for type parameter 'S' is not within its bound

springboot报错内容：
Inferred type ‘S’ for type parameter ‘S’ is not within its bound; should extends xxxxxx

* 根据id查询
*/
@GetMapping("/student/{id}")
public Student findById(@PathVariable("id") Integer id){
return studentRespository.findOne(id);
}

用以上方法findOne(id);报错，经过网上查询资料最后找到原因。解决办法如下，
1、springboot 版本问题，将 2.0.1 版本换成 1.5.4 版本。
2、将studentRespository.findOne(id); 改为 studentRespository.findById(id).orElse(null);
3、将studentRespository.findOne(id); 改为
return studentRespository.findById(id).get();
4、将studentRespository.findOne(id); 改为
return studentRespository.getOne(id);
以上三种办法，第二、三种方法本人试验过可以使用，第一种本人没进行验证，如有需要可以自行验证。第四种方法进行验证因为jdk版本原因并未成功，所有推荐大家使用第二三种方法。

以上均来自个人验证。

标签：ppi 版本问题 ext student jdk 使用方法 param app

原文地址：https://www.cnblogs.com/ming-blogs/p/10288954.html

Inferred type 'S' for type parameter 'S' is not within its bound相关推荐

SpringBoot:Inferred type 'S' for type parameter 'S' is not within its bound
在使用springboot 方法报错: Inferred type 'S' for type parameter 'S' is not within its bound; should extends ...
【Mybatis-Plus】【异常】Inferred type ‘E‘ for type parameter ‘E‘ is not within its bound；
问题描述今天继承Mybatis-Plus里面的BaseMapper做的Dao层接口,实现selectPage()方法,但是一直报异常,代码和报错信息如下: @Service public class ...
Spring data报错：Inferred type 'S' for type parameter 'S' is not within its bound;
Spring data报错:Inferred type 'S' for type parameter 'S' is not within its bound; 参照 org.springframewo ...
Inferred type S for type parameter S is not within its bound
springboot报错内容: Inferred type 'S' for type parameter 'S' is not within its bound; should extends xxx ...
使用SpringBoot报错：Inferred type ‘S‘ for type parameter ‘S‘ is not within its bound。【解决办法】
❌一.错误展示使用SpringBoot时出现如下错误: Inferred type 'S' for type parameter 'S' is not within its bound 错误代码: ...
2、Inferred type ‘S‘ for type parameter ‘S‘ is not within its bound； should extend ‘com.yummy.sell.da
2.Inferred type 'S' for type parameter 'S' is not within its bound; should extend 'com.yummy.sell.da ...
Failed to register Grid Infrastructure type ora.mdns.type
安装11g的集群软件的时候,在最后运行root.sh脚本时候,没有执行成功,最后提示如下错误: [root@r2 ~]# /u01/app/11.2.0/grid_1/root.sh Performi ...
FutureWarning: Passing (type, 1) or ‘1type‘ it will be understood as (type, (1,)) / ‘(1,)type‘
FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version ...
Maven报错解决：Element 'dependency' cannot have character [children], because the type's content type is
在用maven的时候遇到报错: Element 'dependency' cannot have character [children], because the type's content ty ...

Inferred type 'S' for type parameter 'S' is not within its bound

Inferred type 'S' for type parameter 'S' is not within its bound

Inferred type 'S' for type parameter 'S' is not within its bound相关推荐

最新文章

热门文章