java.lang.IllegalStateException: An Errors/BindingResult argument is expected to be declared immediately after the model attribute, the @RequestBody or the @RequestPart arguments to which they apply: public org.springframework.http.ResponseEntity com.example.mybatisplusspringboot.controller.UserController.getUserById(java.lang.String,org.springframework.validation.BindingResult)
时间: 2023-10-09 10:06:53 浏览: 94
这个异常是因为你的 Spring MVC 控制器方法中,`BindingResult` 参数不是紧跟在 `@ModelAttribute`、`@RequestBody` 或 `@RequestPart` 参数之后声明的。`BindingResult` 参数必须紧跟在它所对应的数据绑定参数之后声明。
例如,如果你的控制器方法是这样的:
```java
@RequestMapping(value = "/users/{id}", method = RequestMethod.GET)
public ResponseEntity<User> getUserById(@PathVariable("id") String id, @Valid User user, BindingResult bindingResult) {
// ...
}
```
那么 `BindingResult` 参数就不是紧跟在 `@Valid User user` 参数之后声明的,应该改为这样:
```java
@RequestMapping(value = "/users/{id}", method = RequestMethod.GET)
public ResponseEntity<User> getUserById(@PathVariable("id") String id, @Valid @ModelAttribute User user, BindingResult bindingResult) {
// ...
}
```
这样就能避免这个异常了。
相关问题
java.lang.IllegalStateException: Invalid host: lb://xbmall_product
引用\[1\]:根据提供的代码和错误提示,可以看出在filter方法中,当routeUri的scheme为"lb"且routeUri的host为空时,会抛出java.lang.IllegalStateException异常,异常信息为"Invalid host: lb://xbmall_product"。这个异常的原因是routeUri的host为空,而在这个场景下,host不能为空。因此,需要检查代码中的routeUri的赋值和处理逻辑,确保在使用时host不为空。
#### 引用[.reference_title]
- *1* [根据代码分析java.lang.IllegalStateException: Invalid host: lb://anfang_security_service异常](https://blog.csdn.net/saygood999/article/details/118723361)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^koosearch_v1,239^v3^insert_chatgpt"}} ] [.reference_item]
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Caused by: java.lang.IllegalStateException: No Acknowledgment available as an argument, the listener container must have a MANUAL AckMode to populate the Acknowledgment.
This error usually occurs when using Spring Kafka to consume messages from a Kafka topic. The error message indicates that the listener container is not configured with a MANUAL AckMode, which is required to acknowledge message receipt.
To fix this error, you need to configure your listener container with a MANUAL AckMode. You can do this by setting the following property in your application.yml or application.properties file:
```
spring.kafka.listener.ack-mode=manual
```
Alternatively, you can set the AckMode programmatically in your KafkaListener annotation by setting the ackMode property to AckMode.MANUAL:
```
@KafkaListener(topics = "my-topic", groupId = "my-group", ackMode = AckMode.MANUAL)
public void listen(ConsumerRecord<String, String> record, Acknowledgment acknowledgment) {
// process the message
acknowledgment.acknowledge();
}
```
Note that when using MANUAL AckMode, you need to explicitly acknowledge each message receipt by calling the `acknowledge()` method on the provided `Acknowledgment` object.