Spring Cloud-RestTemplate不会注入拦截器
我在Spring Boot应用程序中创建了一个resttemplate,如下所示:
@Configurationpublic class MyConfiguration {
@LoadBalanced
@Bean
RestTemplate restTemplate() {
return new RestTemplate();
}
}
自动接线时,在所有类中都可以正常工作。但是,在我的拦截器中,这引发了nullpointer异常。
原因可能是什么?如何在拦截器中配置负载平衡(使用功能区)resttemplate?
更新:
我的拦截器:
public class MyInterceptor implements HandlerInterceptorAdapter { @Autowired
RestTemplate restTemplate;
public boolean preHandle(HttpServletRequest request,
HttpServletResponse response, Object handler)
throws Exception {
HttpHeaders headers = new HttpHeaders();
...
HttpEntity<String> entity = new HttpEntity<String>(headers);
//restTemplate is null here
ResponseEntity<String> result =
restTemplate.exchange("<my micro service url using service name>",
HttpMethod.POST, entity, String.class);
...
return true;
}
拦截器像这样添加到Spring Boot应用程序中:
@Configuration public class MyConfigAdapter extends WebMvcConfigurerAdapter {
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new MyInterceptor()).addPathPatterns("/*");
}
}
回答:
您误会了@Autowired
工作原理。一旦您new MyInterceptor()
处于@Bean
方法之外,它就不会自动连接。
执行以下操作:
@Configuration public class MyConfigAdapter extends WebMvcConfigurerAdapter {
@Autowired
MyInterceptor myInterceptor;
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(myInterceptor).addPathPatterns("/*");
}
}
以上是 Spring Cloud-RestTemplate不会注入拦截器 的全部内容, 来源链接: utcz.com/qa/421157.html