/** before方法在调用控制器方法前执行，相反的after则是控制器执行后才执行 */
@Override
protected Object before(Invocation inv) throws Exception {
HttpServletRequest request = inv.getRequest();
HttpSession session = request.getSession();
if (session == null || session.getAttribute("loginUser") == null) {
String pwd = inv.getParameter("pwd");
String userName = inv.getParameter("userName");
if (StringUtils.isNotBlank(pwd) && StringUtils.isNotBlank(userName)) {
Admin admin = adminService.queryAdmin(userName, pwd);
if (null != admin) {
UserSession loginUser = this.createAdminSession(admin);
session.setAttribute("loginUser", loginUser);
}
}
}
return true;
}
public Object[] resolve(final Invocation inv, final ParameterBindingResult parameterBindingResult)
throws Exception {
Object[] parameters = new Object[paramMetaDatas.length];
for (int i = 0; i < resolvers.length; i++) {
if (resolvers[i] == null) {
continue;
}
try {
if (logger.isDebugEnabled()) {
logger.debug(
"Resolves parameter "
+ paramMetaDatas[i].getParamType().getSimpleName()
+ " using "
+ resolvers[i].getClass().getName());
}
parameters[i] = resolvers[i].resolve(inv, paramMetaDatas[i]);
// afterPropertiesSet
if (parameters[i] instanceof InitializingBean) {
((InitializingBean) parameters[i]).afterPropertiesSet();
}
if (parameters[i] == null) {
DefValue defValudeAnnotation = paramMetaDatas[i].getAnnotation(DefValue.class);
if (defValudeAnnotation != null && paramMetaDatas[i].getParamType() == String.class) {
parameters[i] = defValudeAnnotation.value();
}
}
} catch (TypeMismatchException e) {
// 出现这个错误肯定是解析一般参数失败导致的，而非bean里面的某个属性值的解析失败
logger.debug("", e);
// 对简单类型的参数，设置一个默认值给它以支持对该方法的继续调用
if (paramMetaDatas[i].getParamType().isPrimitive()) {
DefValue defValudeAnnotation = paramMetaDatas[i].getAnnotation(DefValue.class);
if (defValudeAnnotation == null
|| DefValue.NATIVE_DEFAULT.equals(defValudeAnnotation.value())) {
// 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 (paramMetaDatas[i].getParamType() == int.class) {
parameters[i] = Integer.valueOf(0);
} else if (paramMetaDatas[i].getParamType() == long.class) {
parameters[i] = Long.valueOf(0);
} else if (paramMetaDatas[i].getParamType() == boolean.class) {
parameters[i] = Boolean.FALSE;
} else if (paramMetaDatas[i].getParamType() == double.class) {
parameters[i] = Double.valueOf(0);
} else if (paramMetaDatas[i].getParamType() == float.class) {
parameters[i] = Float.valueOf(0);
} else {
TypeConverter typeConverter = SafedTypeConverterFactory.getCurrentConverter();
parameters[i] =
typeConverter.convertIfNecessary("0", paramMetaDatas[i].getParamType());
}
} else {
TypeConverter typeConverter = SafedTypeConverterFactory.getCurrentConverter();
parameters[i] =
typeConverter.convertIfNecessary(
defValudeAnnotation.value(), paramMetaDatas[i].getParamType());
}
}
//
String paramName = parameterNames[i];
if (paramName == null) {
for (String name : paramMetaDatas[i].getParamNames()) {
if ((paramName = name) != null) {
break;
}
}
}
Assert.isTrue(paramName != null);
FieldError fieldError =
new FieldError( //
"method", // 该出错字段所在的对象的名字；对于这类异常我们统一规定名字为method
paramName, // 出错的字段的名字；取其参数名
inv.getParameter(paramName), // 被拒绝的值
true, // whether this error represents a binding failure (like a type mismatch);
// else, it is a validation failure
new String[] {e.getErrorCode()}, // "typeMismatch"
new String[] {
inv.getParameter(paramName)
}, // the array of arguments to be used to resolve this message
null // the default message to be used to resolve this message
);
parameterBindingResult.addError(fieldError);
} catch (Exception e) {
// 什么错误呢？比如很有可能是构造对象不能成功导致的错误，没有默认构造函数、构造函数执行失败等等
logger.error("", e);
throw e;
}
}
return parameters;
}
