get请求RequestBodyAdvice
时间: 2023-06-21 09:12:42 浏览: 55
在Spring框架中,如果我们想要对一个GET请求的请求体进行处理,则可以通过实现`RequestBodyAdvice`接口来实现。
`RequestBodyAdvice`接口有四个方法:
1. `supports(MethodParameter parameter, Type targetType, Class<? extends HttpMessageConverter<?>> converterType)`:用于判断支持哪些请求体的处理。如果返回`true`,则会调用后面三个方法对请求体进行处理;否则不会进行处理。
2. `beforeBodyRead(HttpInputMessage inputMessage, MethodParameter parameter, Type targetType, Class<? extends HttpMessageConverter<?>> converterType)`:在请求体读取之前调用,用于对请求体进行处理。
3. `afterBodyRead(Object body, HttpInputMessage inputMessage, MethodParameter parameter, Type targetType, Class<? extends HttpMessageConverter<?>> converterType)`:在请求体读取之后调用,用于对请求体进行处理。
4. `handleError(HttpMessageNotReadableException ex, HttpInputMessage inputMessage, MethodParameter parameter, Type targetType, Class<? extends HttpMessageConverter<?>> converterType)`:在读取请求体出现异常时调用。
需要注意的是,`RequestBodyAdvice`只对请求体为JSON格式的GET请求有效,对于其他格式的请求体(如form-data),需要使用其他方式进行处理。
以下是一个使用`RequestBodyAdvice`处理请求体的示例:
```java
@ControllerAdvice
public class CustomRequestBodyAdvice implements RequestBodyAdvice {
@Override
public boolean supports(MethodParameter methodParameter, Type type, Class<? extends HttpMessageConverter<?>> aClass) {
return methodParameter.getMethod().getName().equals("getUserInfo") && type.equals(UserInfo.class);
}
@Override
public Object beforeBodyRead(HttpInputMessage httpInputMessage, MethodParameter methodParameter, Type type, Class<? extends HttpMessageConverter<?>> aClass) throws IOException, HttpMessageNotReadableException {
String requestBody = StreamUtils.copyToString(httpInputMessage.getBody(), StandardCharsets.UTF_8);
JSONObject jsonObject = JSON.parseObject(requestBody);
UserInfo userInfo = new UserInfo();
userInfo.setUserName(jsonObject.getString("userName"));
userInfo.setPassword(jsonObject.getString("password"));
return userInfo;
}
@Override
public Object afterBodyRead(Object o, HttpInputMessage httpInputMessage, MethodParameter methodParameter, Type type, Class<? extends HttpMessageConverter<?>> aClass) {
return o;
}
@Override
public Object handleEmptyBody(Object o, HttpInputMessage httpInputMessage, MethodParameter methodParameter, Type type, Class<? extends HttpMessageConverter<?>> aClass) {
return o;
}
@Override
public void handleError(HttpMessageNotReadableException httpMessageNotReadableException, HttpInputMessage httpInputMessage, MethodParameter methodParameter, Type type, Class<? extends HttpMessageConverter<?>> aClass) throws IOException {
throw httpMessageNotReadableException;
}
}
```
在以上示例中,我们使用`supports`方法判断请求体是否为`UserInfo`类型,如果是则调用`beforeBodyRead`方法对请求体进行处理,将JSON格式的请求体转换成`UserInfo`对象。最后,我们返回处理后的`UserInfo`对象即可。