Spring Boot删除Whitelabel错误页面我正在尝试删除白标错误页面,所以我所做的是为“/ error”创建了一个控制器映射,@RestControllerpublic class IndexController {
@RequestMapping(value = "/error")
public String error() {
return "Error handling";
}}但现在我收到了这个错误。Exception in thread "AWT-EventQueue-0" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/web/servlet/config/annotation/DelegatingWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'basicErrorController' bean method
public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletR equest)to {[/error],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]}: There is already 'indexController' bean method不知道我做错了什么。请指教。编辑:已经添加 error.whitelabel.enabled=false 到application.properties文件中,仍然会收到相同的错误
3 回答
繁花如伊
TA贡献2012条经验 获得超12个赞
您需要将代码更改为以下内容:
@RestControllerpublic class IndexController implements ErrorController{ private static final String PATH = "/error"; @RequestMapping(value = PATH) public String error() { return "Error handling"; } @Override public String getErrorPath() { return PATH; }}
您的代码不起作用,因为BasicErrorController
当您没有指定实现时,Spring Boot会自动将其注册为Spring Bean ErrorController
。
要看到这个事实,只需导航到ErrorMvcAutoConfiguration.basicErrorController
这里。
慕虎7371278
TA贡献1802条经验 获得超4个赞
如果你想要一个更“JSONish”的响应页面,你可以试试这样的东西:
import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.autoconfigure.web.ErrorAttributes;import org.springframework.boot.autoconfigure.web.ErrorController;import org.springframework.util.Assert;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.context.request.RequestAttributes;import org.springframework.web.context.request.ServletRequestAttributes;import javax.servlet.http.HttpServletRequest;import java.util.Map;@RestController@RequestMapping("/error")public class SimpleErrorController implements ErrorController { private final ErrorAttributes errorAttributes; @Autowired public SimpleErrorController(ErrorAttributes errorAttributes) { Assert.notNull(errorAttributes, "ErrorAttributes must not be null"); this.errorAttributes = errorAttributes; } @Override public String getErrorPath() { return "/error"; } @RequestMapping public Map<String, Object> error(HttpServletRequest aRequest){ Map<String, Object> body = getErrorAttributes(aRequest,getTraceParameter(aRequest)); String trace = (String) body.get("trace"); if(trace != null){ String[] lines = trace.split("\n\t"); body.put("trace", lines); } return body; } private boolean getTraceParameter(HttpServletRequest request) { String parameter = request.getParameter("trace"); if (parameter == null) { return false; } return !"false".equals(parameter.toLowerCase()); } private Map<String, Object> getErrorAttributes(HttpServletRequest aRequest, boolean includeStackTrace) { RequestAttributes requestAttributes = new ServletRequestAttributes(aRequest); return errorAttributes.getErrorAttributes(requestAttributes, includeStackTrace); }}
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