org.springframework.web.bind.annotation.RequestParam#defaultValue ( )源码实例Demo

/**
 * Build params parameter.
 *
 * @param parameterInfo the parameter info
 * @param components the components
 * @param requestMethod the request method
 * @param jsonView the json view
 * @return the parameter
 */
public Parameter buildParams(ParameterInfo parameterInfo, Components components,
		RequestMethod requestMethod, JsonView jsonView) {
	MethodParameter methodParameter = parameterInfo.getMethodParameter();
	RequestHeader requestHeader = parameterInfo.getRequestHeader();
	RequestParam requestParam = parameterInfo.getRequestParam();
	PathVariable pathVar = parameterInfo.getPathVar();
	CookieValue cookieValue = parameterInfo.getCookieValue();

	RequestInfo requestInfo;

	if (requestHeader != null) {
		requestInfo = new RequestInfo(ParameterIn.HEADER.toString(), parameterInfo.getpName(), requestHeader.required(),
				requestHeader.defaultValue());
		return buildParam(parameterInfo, components, requestInfo, jsonView);

	}
	else if (requestParam != null && !parameterBuilder.isFile(parameterInfo.getMethodParameter())) {
		requestInfo = new RequestInfo(ParameterIn.QUERY.toString(), parameterInfo.getpName(), requestParam.required() && !methodParameter.isOptional(),
				requestParam.defaultValue());
		return buildParam(parameterInfo, components, requestInfo, jsonView);
	}
	else if (pathVar != null) {
		requestInfo = new RequestInfo(ParameterIn.PATH.toString(), parameterInfo.getpName(), !methodParameter.isOptional(), null);
		return buildParam(parameterInfo, components, requestInfo, jsonView);
	}
	else if (cookieValue != null) {
		requestInfo = new RequestInfo(ParameterIn.COOKIE.toString(), parameterInfo.getpName(), cookieValue.required(),
				cookieValue.defaultValue());
		return buildParam(parameterInfo, components, requestInfo, jsonView);
	}
	// By default
	DelegatingMethodParameter delegatingMethodParameter = (DelegatingMethodParameter) methodParameter;
	if (RequestMethod.GET.equals(requestMethod)
			|| (parameterInfo.getParameterModel() != null && (ParameterIn.PATH.toString().equals(parameterInfo.getParameterModel().getIn())))
			|| delegatingMethodParameter.isParameterObject())
		return this.buildParam(QUERY_PARAM, components, parameterInfo, !methodParameter.isOptional(), null, jsonView);

	return null;
}
 

RequestParamNamedValueInfo(RequestParam annotation) {
	super(annotation.name(), annotation.required(), annotation.defaultValue());
}
 

public RequestParamNamedValueInfo(RequestParam annotation) {
	super(annotation.name(), annotation.required(), annotation.defaultValue());
}
 

RequestParamNamedValueInfo(RequestParam annotation) {
	super(annotation.name(), annotation.required(), annotation.defaultValue());
}
 

public RequestParamNamedValueInfo(RequestParam annotation) {
	super(annotation.name(), annotation.required(), annotation.defaultValue());
}
 

public RequestParamNamedValueInfo(RequestParam annotation) {
    super((annotation.name() != null && annotation.name() != "") ? annotation.name() : annotation.value(),
        annotation.required(), annotation.defaultValue());

}
 

@Override
protected String pureReadDefaultValue(RequestParam requestParam) {
  return requestParam.defaultValue();
}
 

public RequestParamNamedValueInfo(RequestParam annotation) {
	super(annotation.name(), annotation.required(), annotation.defaultValue());
}
 

public RequestParamNamedValueInfo(RequestParam annotation) {
    super(annotation.name(), annotation.required(), annotation.defaultValue());
}
 

public RequestParamNamedValueInfo(RequestParam annotation) {
	super(annotation.name(), annotation.required(), annotation.defaultValue());
}
 

protected void handleArg(MultiValueMap<String, Object> values, ApiClientMethodParameter mp, final Object pvalue, boolean parameterNameAsPrefix){
		if(pvalue instanceof ApiArgumentTransformer){
			Object val = ((ApiArgumentTransformer)pvalue).asApiValue();
			values.add(mp.getParameterName(), val);
			return ;
		}
		
		String prefix = "";
		Object paramValue = pvalue;
		//下列情况，强制使用名称作为前缀
		if(mp.hasParameterAnnotation(RequestParam.class)){
			RequestParam params = mp.getParameterAnnotation(RequestParam.class);
			if(pvalue==null && params.required() && (paramValue=params.defaultValue())==ValueConstants.DEFAULT_NONE){
				throw new BaseException("parameter["+params.name()+"] must be required : " + mp.getParameterName());
			}
			parameterNameAsPrefix = true;
		}else if(isUriVariables(mp) || mp.hasParameterAnnotation(FieldName.class)){
			parameterNameAsPrefix = true;
		}else if(beanToMapConvertor.isMappableValue(pvalue)){//可直接映射为值的参数
			parameterNameAsPrefix = true;
		}
		
		if(parameterNameAsPrefix){
			prefix = mp.getParameterName();
		}
		beanToMapConvertor.flatObject(prefix, paramValue, (k, v, ctx)->{
			values.add(k, v);
		});
		
		/*if(falatable){
//			beanToMapConvertor.flatObject(mp.getParameterName(), paramValue, (k, v, ctx)->{
			beanToMapConvertor.flatObject(mp.getParameterName(), paramValue, (k, v, ctx)->{
				if(v instanceof Enum){
					Enum<?> e = (Enum<?>)v;
					if(e instanceof ValueEnum){
						v = ((ValueEnum<?>)e).getValue();
					}else{//默认使用name
						v = e.name();
					}
				}else if(v instanceof Resource){
					//ignore，忽略，不转为string
				}else{
					v = v.toString();
				}
				if(ctx!=null){
//					System.out.println("ctx.getName():"+ctx.getName());
					values.add(ctx.getName(), v);
				}else{
					values.add(k, v);
				}
//				values.add(k, v);
			});
		}else{
			values.add(mp.getParameterName(), pvalue);
		}*/
	}
 

@Override
protected String getDefaultValue(final RequestParam annotation) {
    return annotation.defaultValue();
}