Java WebDataBinder.getBindingResult方法代碼示例

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
/**
 * Throws MethodArgumentNotValidException if validation fails.
 * @throws HttpMessageNotReadableException if {@link RequestBody#required()}
 * is {@code true} and there is no body content or if there is no suitable
 * converter to read the content with.
 */
@Override
public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
		NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {

	Object arg = readWithMessageConverters(webRequest, parameter, parameter.getGenericParameterType());
	String name = Conventions.getVariableNameForParameter(parameter);

	WebDataBinder binder = binderFactory.createBinder(webRequest, arg, name);
	if (arg != null) {
		validateIfApplicable(binder, parameter);
		if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
			throw new MethodArgumentNotValidException(parameter, binder.getBindingResult());
		}
	}
	mavContainer.addAttribute(BindingResult.MODEL_KEY_PREFIX + name, binder.getBindingResult());

	return arg;
}
 

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
/**
 * Resolve the argument from the model or if not found instantiate it with
 * its default if it is available. The model attribute is then populated
 * with request values via data binding and optionally validated
 * if {@code @java.validation.Valid} is present on the argument.
 * @throws BindException if data binding and validation result in an error
 * and the next method parameter is not of type {@link Errors}.
 * @throws Exception if WebDataBinder initialization fails.
 */
@Override
public final Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
		NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {

	String name = ModelFactory.getNameForParameter(parameter);
	Object attribute = (mavContainer.containsAttribute(name) ?
			mavContainer.getModel().get(name) : createAttribute(name, parameter, binderFactory, webRequest));

	WebDataBinder binder = binderFactory.createBinder(webRequest, attribute, name);
	if (binder.getTarget() != null) {
		bindRequestParameters(binder, webRequest);
		validateIfApplicable(binder, parameter);
		if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
			throw new BindException(binder.getBindingResult());
		}
	}

	// Add resolved attribute and BindingResult at the end of the model
	Map<String, Object> bindingResultModel = binder.getBindingResult().getModel();
	mavContainer.removeAttributes(bindingResultModel);
	mavContainer.addAllAttributes(bindingResultModel);

	return binder.convertIfNecessary(binder.getTarget(), parameter.getParameterType(), parameter);
}
 

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
private void validate(WebDataBinder binder, MethodParameter parameter) throws Exception, MethodArgumentNotValidException {

		Annotation[] annotations = parameter.getParameterAnnotations();
		for (Annotation annot : annotations) {
			if (annot.annotationType().getSimpleName().startsWith("Valid")) {
				Object hints = AnnotationUtils.getValue(annot);
				binder.validate(hints instanceof Object[] ? (Object[]) hints : new Object[] {hints});
				BindingResult bindingResult = binder.getBindingResult();
				if (bindingResult.hasErrors()) {
					if (isBindExceptionRequired(binder, parameter)) {
						throw new MethodArgumentNotValidException(parameter, bindingResult);
					}
				}
				break;
			}
		}
	}
 

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
protected void validateComponent(WebDataBinder binder, MethodParameter parameter) throws BindException {

        boolean validateParameter = validateParameter(parameter);
        Annotation[] annotations = binder.getTarget().getClass().getAnnotations();
        for (Annotation annot : annotations) {
            if (annot.annotationType().getSimpleName().startsWith("Valid") && validateParameter) {
                Object hints = AnnotationUtils.getValue(annot);
                binder.validate(hints instanceof Object[] ? (Object[]) hints : new Object[]{hints});
            }
        }

        if (binder.getBindingResult().hasErrors()) {
            if (isBindExceptionRequired(binder, parameter)) {
                throw new BindException(binder.getBindingResult());
            }
        }
    }
 

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
protected void validateComponent(WebDataBinder binder, MethodParameter parameter) throws BindException {
    
    boolean validateParameter = validateParameter(parameter);
    Annotation[] annotations = binder.getTarget().getClass().getAnnotations();
    for (Annotation annot : annotations) {
        if (annot.annotationType().getSimpleName().startsWith("Valid") && validateParameter) {
            Object hints = AnnotationUtils.getValue(annot);
            binder.validate(hints instanceof Object[] ? (Object[]) hints : new Object[] {hints});
        }
    }

    if (binder.getBindingResult().hasErrors()) {
        if (isBindExceptionRequired(binder, parameter)) {
            throw new BindException(binder.getBindingResult());
        }
    }
}
 

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
/**
 * Resolve the argument from the model or if not found instantiate it with
 * its default if it is available. The model attribute is then populated
 * with request values via data binding and optionally validated
 * if {@code @java.validation.Valid} is present on the argument.
 * @throws BindException if data binding and validation result in an error
 * and the next method parameter is not of type {@link Errors}.
 * @throws Exception if WebDataBinder initialization fails.
 */
@Override
public final Object resolveArgument(
		MethodParameter parameter, ModelAndViewContainer mavContainer,
		NativeWebRequest request, WebDataBinderFactory binderFactory)
		throws Exception {

	String name = ModelFactory.getNameForParameter(parameter);
	Object attribute = (mavContainer.containsAttribute(name)) ?
			mavContainer.getModel().get(name) : createAttribute(name, parameter, binderFactory, request);

	WebDataBinder binder = binderFactory.createBinder(request, attribute, name);
	if (binder.getTarget() != null) {
		bindRequestParameters(binder, request);
		validateIfApplicable(binder, parameter);
		if (binder.getBindingResult().hasErrors()) {
			if (isBindExceptionRequired(binder, parameter)) {
				throw new BindException(binder.getBindingResult());
			}
		}
	}

	// Add resolved attribute and BindingResult at the end of the model

	Map<String, Object> bindingResultModel = binder.getBindingResult().getModel();
	mavContainer.removeAttributes(bindingResultModel);
	mavContainer.addAllAttributes(bindingResultModel);

	return binder.getTarget();
}
 

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
private void doBind(WebDataBinder binder, NativeWebRequest webRequest, boolean validate,
		Object[] validationHints, boolean failOnErrors) throws Exception {

	doBind(binder, webRequest);
	if (validate) {
		binder.validate(validationHints);
	}
	if (failOnErrors && binder.getBindingResult().hasErrors()) {
		throw new BindException(binder.getBindingResult());
	}
}
 

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
/**
 * @param object 需要校驗的隊形
 * @param <T>
 * @return
 * @throws ConstraintViolationException 約束違反異常
 */
public static <T>T validate(T object) throws BindException {
    WebDataBinder binder = new WebDataBinder(object, object.getClass().getSimpleName());
    validator.validate(object, binder.getBindingResult());
    if (binder.getBindingResult().hasErrors() ) {
        throw new BindException(binder.getBindingResult());
    }
    return  object;
}
 

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
/**
 *  校驗對象的某個參數
 * @param object 需要校驗的對象
 * @param propertyName 校驗的參數
 * @param <T>
 * @return
 * @throws BindException 字段綁定異常
 */
public static <T>T  validateProperty(T object, String propertyName) throws BindException {
    WebDataBinder binder = new WebDataBinder(object, object.getClass().getSimpleName());
    validator.validateProperty(object, propertyName, binder.getBindingResult());
    if (binder.getBindingResult().hasErrors() ) {
        throw new BindException(binder.getBindingResult());
    }

    return  object;
}
 

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
@Override
public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
		NativeWebRequest request, WebDataBinderFactory binderFactory) throws Exception {
	
	String name = ModelFactory.getNameForParameter(parameter);
	Object attribute = (mavContainer.containsAttribute(name)) ?
			mavContainer.getModel().get(name) : createAttribute(name, parameter, binderFactory, request);

	WebDataBinder binder = binderFactory.createBinder(request, attribute, name);
	if (binder.getTarget() != null) {
		//XXX: thinking 增加一個參數MethodParameter方便使用注解
		bindRequestParameters(binder, request,parameter);
		validateIfApplicable(binder, parameter);
		if (binder.getBindingResult().hasErrors()) {
			if (isBindExceptionRequired(binder, parameter)) {
				throw new BindException(binder.getBindingResult());
			}
		}
	}

	// Add resolved attribute and BindingResult at the end of the model

	Map<String, Object> bindingResultModel = binder.getBindingResult().getModel();
	mavContainer.removeAttributes(bindingResultModel);
	mavContainer.addAllAttributes(bindingResultModel);

	return binder.getTarget();
	
}
 

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
/**
 * Resolve the argument from the model or if not found instantiate it with
 * its default if it is available. The model attribute is then populated
 * with request values via data binding and optionally validated
 * if {@code @java.validation.Valid} is present on the argument.
 *
 * @throws org.springframework.validation.BindException
 *                   if data binding and validation result in an error
 *                   and the next method parameter is not of type {@link org.springframework.validation.Errors}.
 * @throws Exception if WebDataBinder initialization fails.
 */
public final Object resolveArgument(MethodParameter parameter,
                                    ModelAndViewContainer mavContainer,
                                    NativeWebRequest request,
                                    WebDataBinderFactory binderFactory) throws Exception {
    String name = parameter.getParameterAnnotation(FormModel.class).value();

    Object target = (mavContainer.containsAttribute(name)) ?
            mavContainer.getModel().get(name) : createAttribute(name, parameter, binderFactory, request);

    WebDataBinder binder = binderFactory.createBinder(request, target, name);
    target = binder.getTarget();
    if (target != null) {
        bindRequestParameters(mavContainer, binderFactory, binder, request, parameter);

        validateIfApplicable(binder, parameter);
        if (binder.getBindingResult().hasErrors()) {
            if (isBindExceptionRequired(binder, parameter)) {
                throw new BindException(binder.getBindingResult());
            }
        }
    }

    target = binder.convertIfNecessary(binder.getTarget(), parameter.getParameterType());
    mavContainer.addAttribute(name, target);

    return target;
}
 

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
/**
 * Resolve the argument from the model or if not found instantiate it with 
 * its default if it is available. The model attribute is then populated 
 * with request values via data binding and optionally validated
 * if {@code @java.validation.Valid} is present on the argument.
 * @throws BindException if data binding and validation result in an error
 * and the next method parameter is not of type {@link Errors}.
 * @throws Exception if WebDataBinder initialization fails.
 */
public final Object resolveArgument(MethodParameter parameter,
                                    ModelAndViewContainer mavContainer,
                                    NativeWebRequest request,
                                    WebDataBinderFactory binderFactory) throws Exception {
    String name = parameter.getParameterAnnotation(FormModel.class).value();
    
    Object target = (mavContainer.containsAttribute(name)) ?
            mavContainer.getModel().get(name) : createAttribute(name, parameter, binderFactory, request);
    
    WebDataBinder binder = binderFactory.createBinder(request, target, name);
    target = binder.getTarget();
    if (target != null) {
        bindRequestParameters(mavContainer, binderFactory, binder, request, parameter);
        
        validateIfApplicable(binder, parameter);
        if (binder.getBindingResult().hasErrors()) {
            if (isBindExceptionRequired(binder, parameter)) {
                throw new BindException(binder.getBindingResult());
            }
        }
    }
    
    target = binder.convertIfNecessary(binder.getTarget(), parameter.getParameterType());
    mavContainer.addAttribute(name, target);
    
    return target;
}
 

import org.springframework.web.bind.WebDataBinder; //導入方法依賴的package包/類
@Override
@UsesJava8
public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
		NativeWebRequest request, WebDataBinderFactory binderFactory) throws Exception {

	HttpServletRequest servletRequest = request.getNativeRequest(HttpServletRequest.class);
	assertIsMultipartRequest(servletRequest);

	MultipartHttpServletRequest multipartRequest =
			WebUtils.getNativeRequest(servletRequest, MultipartHttpServletRequest.class);

	Class<?> paramType = parameter.getParameterType();
	boolean optional = paramType.getName().equals("java.util.Optional");
	if (optional) {
		parameter.increaseNestingLevel();
		paramType = parameter.getNestedParameterType();
	}

	String partName = getPartName(parameter);
	Object arg;

	if (MultipartFile.class == paramType) {
		Assert.notNull(multipartRequest, "Expected MultipartHttpServletRequest: is a MultipartResolver configured?");
		arg = multipartRequest.getFile(partName);
	}
	else if (isMultipartFileCollection(parameter)) {
		Assert.notNull(multipartRequest, "Expected MultipartHttpServletRequest: is a MultipartResolver configured?");
		arg = multipartRequest.getFiles(partName);
	}
	else if (isMultipartFileArray(parameter)) {
		Assert.notNull(multipartRequest, "Expected MultipartHttpServletRequest: is a MultipartResolver configured?");
		List<MultipartFile> files = multipartRequest.getFiles(partName);
		arg = files.toArray(new MultipartFile[files.size()]);
	}
	else if ("javax.servlet.http.Part".equals(paramType.getName())) {
		assertIsMultipartRequest(servletRequest);
		arg = servletRequest.getPart(partName);
	}
	else if (isPartCollection(parameter)) {
		assertIsMultipartRequest(servletRequest);
		arg = new ArrayList<Object>(servletRequest.getParts());
	}
	else if (isPartArray(parameter)) {
		assertIsMultipartRequest(servletRequest);
		arg = RequestPartResolver.resolvePart(servletRequest);
	}
	else {
		try {
			HttpInputMessage inputMessage = new RequestPartServletServerHttpRequest(servletRequest, partName);
			arg = readWithMessageConverters(inputMessage, parameter, parameter.getNestedGenericParameterType());
			WebDataBinder binder = binderFactory.createBinder(request, arg, partName);
			if (arg != null) {
				validateIfApplicable(binder, parameter);
				if (binder.getBindingResult().hasErrors() && isBindExceptionRequired(binder, parameter)) {
					throw new MethodArgumentNotValidException(parameter, binder.getBindingResult());
				}
			}
			mavContainer.addAttribute(BindingResult.MODEL_KEY_PREFIX + partName, binder.getBindingResult());
		}
		catch (MissingServletRequestPartException ex) {
			// handled below
			arg = null;
		}
	}

	RequestPart requestPart = parameter.getParameterAnnotation(RequestPart.class);
	boolean isRequired = ((requestPart == null || requestPart.required()) && !optional);

	if (arg == null && isRequired) {
		throw new MissingServletRequestPartException(partName);
	}
	if (optional) {
		arg = Optional.ofNullable(arg);
	}

	return arg;
}