public boolean supports(ParamMetaData metaData) {
if (ClassUtils.isPrimitiveOrWrapper(metaData.getParamType())) {
return true;
}
SimpleTypeConverter simpleTypeConverter = SafedTypeConverterFactory.getCurrentConverter();
return simpleTypeConverter.findCustomEditor(metaData.getParamType(), null) != null
|| simpleTypeConverter.getDefaultEditor(metaData.getParamType()) != null;
}
public Object resolve(Invocation inv, ParamMetaData metaData) {
String toConvert = null;
//
FlashParam flashParam = metaData.getAnnotation(FlashParam.class);
if (flashParam != null) {
toConvert = inv.getFlash().get(flashParam.value());
}
for (String paramName : metaData.getParamNames()) {
if (paramName != null) {
toConvert = inv.getRequest().getParameter(paramName);
if (toConvert != null) {
break;
}
}
}
if (toConvert == null) {
DefValue defValudeAnnotation = metaData.getAnnotation(DefValue.class);
if (defValudeAnnotation != null
&& !DefValue.NATIVE_DEFAULT.equals(defValudeAnnotation.value())) {
toConvert = defValudeAnnotation.value();
}
}
if (toConvert != null) {
SimpleTypeConverter typeConverter = SafedTypeConverterFactory.getCurrentConverter();
return typeConverter.convertIfNecessary(toConvert, metaData.getParamType());
}
if (metaData.getParamType().isPrimitive()) {
// 对这最常用的类型做一下if-else判断，其他类型就简单使用converter来做吧
if (metaData.getParamType() == int.class) {
return Integer.valueOf(0);
} else if (metaData.getParamType() == long.class) {
return Long.valueOf(0);
} else if (metaData.getParamType() == boolean.class) {
return Boolean.FALSE;
} else if (metaData.getParamType() == double.class) {
return Double.valueOf(0);
} else if (metaData.getParamType() == float.class) {
return Float.valueOf(0);
} else {
SimpleTypeConverter typeConverter = SafedTypeConverterFactory.getCurrentConverter();
return typeConverter.convertIfNecessary("0", metaData.getParamType());
}
}
return null;
}
/**
* 得到参数列表
*
* @param method
* @param model
* @param request
* @param response
* @param c
* @return
*/
@SuppressWarnings("unchecked")
public static Object[] getArgs(
Method method,
Map<String, Object> model,
HttpServletRequest request,
HttpServletResponse response,
Class<?> c) {
Class<?>[] paramTypes = method.getParameterTypes();
Object[] args = new Object[paramTypes.length];
Map<String, Object> argMap = new HashMap<String, Object>(args.length);
Map<String, String> pathValues = null;
PathPattern pathPattern = method.getAnnotation(PathPattern.class);
if (pathPattern != null) {
String path = request.getRequestURI();
int index = path.lastIndexOf('.');
if (index != -1) {
path = path.substring(0, index);
String[] patterns = pathPattern.patterns();
pathValues = getPathValues(patterns, path);
}
}
MapBindingResult errors = new MapBindingResult(argMap, "");
ParameterNameDiscoverer parameterNameDiscoverer =
new LocalVariableTableParameterNameDiscoverer();
for (int i = 0; i < paramTypes.length; i++) {
Class<?> paramType = paramTypes[i];
MethodParameter methodParam = new MethodParameter(method, i);
methodParam.initParameterNameDiscovery(parameterNameDiscoverer);
GenericTypeResolver.resolveParameterType(methodParam, c.getClass());
String paramName = methodParam.getParameterName();
// map
if (Map.class.isAssignableFrom(paramType)) {
args[i] = model;
}
// HttpServletRequest
else if (HttpServletRequest.class.isAssignableFrom(paramType)) {
args[i] = request;
}
// HttpServletResponse
else if (HttpServletResponse.class.isAssignableFrom(paramType)) {
args[i] = response;
}
// HttpSession
else if (HttpSession.class.isAssignableFrom(paramType)) {
args[i] = request.getSession();
}
// Errors
else if (Errors.class.isAssignableFrom(paramType)) {
args[i] = errors;
}
// MultipartFile
else if (MultipartFile.class.isAssignableFrom(paramType)) {
MultipartFile[] files = resolveMultipartFiles(request, errors, paramName);
if (files != null && files.length > 0) {
args[i] = files[0];
}
}
// MultipartFile[]
else if (MultipartFile[].class.isAssignableFrom(paramType)) {
args[i] = resolveMultipartFiles(request, errors, paramName);
} else {
// 简单数据类型
if (BeanUtils.isSimpleProperty(paramType)) {
SimpleTypeConverter converter = new SimpleTypeConverter();
Object value;
// 是否是数组
if (paramType.isArray()) {
value = request.getParameterValues(paramName);
} else {
Object[] parameterAnnotations = methodParam.getParameterAnnotations();
value = null;
if (parameterAnnotations != null && parameterAnnotations.length > 0) {
if (pathValues != null && pathValues.size() > 0) {
for (Object object : parameterAnnotations) {
if (PathVariable.class.isInstance(object)) {
PathVariable pv = (PathVariable) object;
if (StringUtils.isEmpty(pv.value())) {
value = pathValues.get(paramName);
} else {
value = pathValues.get(pv.value());
}
break;
}
}
}
} else {
value = request.getParameter(paramName);
}
}
try {
args[i] = converter.convertIfNecessary(value, paramType, methodParam);
model.put(paramName, args[i]);
} catch (TypeMismatchException e) {
errors.addError(new FieldError(paramName, paramName, e.getMessage()));
}
} else {
// 复杂数据类型POJO类
if (paramType.isArray()) {
ObjectArrayDataBinder binder =
new ObjectArrayDataBinder(paramType.getComponentType(), paramName);
args[i] = binder.bind(request);
model.put(paramName, args[i]);
} else {
Object bindObject = BeanUtils.instantiateClass(paramType);
SummerServletRequestDataBinder binder =
new SummerServletRequestDataBinder(bindObject, paramName);
binder.bind(request);
BindException be = new BindException(binder.getBindingResult());
List<FieldError> fieldErrors = be.getFieldErrors();
for (FieldError fieldError : fieldErrors) {
errors.addError(fieldError);
}
args[i] = binder.getTarget();
model.put(paramName, args[i]);
}
}
}
}
return args;
}
