Struts2 验证中的短路

Question

假设动作类中有一个BigDecimal 类型的字段，如下所示。

@Namespace("/admin_side")
@ResultPath("/WEB-INF/content")
@ParentPackage(value = "struts-default")
public final class TestAction extends ActionSupport
{
    private BigDecimal price;

    //Setter and getter.        

    @Validations(
    requiredFields = {
        @RequiredFieldValidator(fieldName = "price", type = ValidatorType.FIELD, message = "Price is mandatory.")},
    fieldExpressions = {
        @FieldExpressionValidator(fieldName = "price", expression = "price>0", shortCircuit = true, message = "Price cannot be less than or equal to zero.")})
    @Action(value = "Add",
    results = {
        @Result(name = ActionSupport.SUCCESS, type = "redirectAction", params = {"namespace", "/admin_side", "actionName", "Test"}),
        @Result(name = ActionSupport.INPUT, location = "Test.jsp")},
    interceptorRefs = {
        @InterceptorRef(value = "defaultStack", params = {"params.acceptParamNames", "price", "validation.validateAnnotatedMethodOnly", "true"})
    })
    public String insert() {
        return ActionSupport.SUCCESS;
    }

    //This method is worth nothing. It is used just to return an initial view on page load.
    @Action(value = "Test",
    results = {
        @Result(name = ActionSupport.SUCCESS, location = "Test.jsp"),
        @Result(name = ActionSupport.INPUT, location = "Test.jsp")},
    interceptorRefs = {
        @InterceptorRef(value = "defaultStack", params = {"params.acceptParamNames", "", "params.excludeMethods", "load", "validation.validateAnnotatedMethodOnly", "true"})})
    public String load() throws Exception {
        return ActionSupport.SUCCESS;
    }
}

下面是表格。

<s:form namespace="/admin_side" action="Test" id="dataForm" name="dataForm">
    <s:fielderror fieldName="price"/>
    <s:textfield id="price" name="price"/>

    <s:submit value="Submit" action="Add"/>
</s:form>

我想实现，

1. 如果该字段留空，那么唯一的消息，价格是必填项。 应通过@RequiredFieldValidator 显示
2. 如果输入像“abc”这样的非数字值，它应该只显示来自属性文件的转换错误消息。
3. 如果尝试使用负值，那么唯一的消息，价格不能小于或等于零。应该通过@FieldExpressionValidator 出现。

一次应该出现一个转换错误或一个验证错误。

这可能吗？到目前为止，我还没有正确理解 shourtCircuit 属性的功能。

Answer 1

乍一看没见过这么多。但是看看Type Conversion Error Handling 我会说有一种方法可以处理转换错误。通过将转换验证器添加到短路验证器的配置中。 Short-circuit 表示如果此类验证器有错误，则跳过其他验证器。

 conversionErrorFields = @ConversionErrorFieldValidator(fieldName = "price", message = "Price has invalid value", shortCircuit = true) 

将此代码放在@Validations 注释下。