Struts Validator Development Guide

Reports the cause and brief description of the user's error occurrence through the information defined in the ApplicationResources.properties file.

It is shown to display the specific error message generated by the Validator framework.

Capture the wrong information of JavaScript

To capture the error message generated by JavaScript First, let's generate the JavaScript code generated by the JSP page and let the submit button trigger the corresponding check function when the user clicks the submission button. Implementation method is as follows:

First let JSP trigger the calibration function and use this HTML code:

>

Where Action specifies the action of this form, this is no different from ordinary Form, the onSubmit property specifies the verification function, its rules are: return space Validator ValidatorForm name (this)

Note that such a combination rule cannot be changed, otherwise the page error can not be verified. Please pay attention to the first letter of the ValidatorForm's name must be capitalized, regardless of whether it is capitalized in the struts-congfig.xml file. Here, you must use it as uppercase letters.

Then you have to generate a JavaScript code that you can implement in the JSP page. This step is also very simple, just add the following sentence at the end of the JSP page:

Where the FormName's name is consistent with the configuration in the struts-config.xml file. Samples of STATICJAVAScript True will use the JavaScript code to check (these JavaScript code is automatically generated by the Validator framework of Struts, we only You need to configure the validator.xml file), and StaticJavaScript When Validator will check with the server code, the check code of these serve doesn't need to be written. Written Struts Validator check password input

Using Struts's Validator check page Form is consistent, it is generally used in the check password. When the user enters two passwords, it is necessary to verify whether the user's two inputs are consistent. If it is inconsistent, it needs to be reported. Implement this function The steps are as follows:

1. Write a Validator to implement a consistent check of two fields in Form:

Package cn.com.syni.net800114.validator;

Import org.apache.commons.validator.validatorutil; import org.apache.commons.validator.field; import org.apache.commons.validator.Validator; Import Org.Apache.commons.validator.GenericValidator;

Import org.apache.struts.action.actionerro; import org.apache.struts.validator.resources;

Import javax.servlet.http.httpservletRequest;

public class ValidationUtil {public static boolean validateTwoFields (Object bean, ValidatorAction va, Field field, ActionErrors errors, HttpServletRequest request) {String value = ValidatorUtil.getValueAsString (bean, field.getProperty ()); String sProperty2 = field.getVarValue ( "secondProperty "); String value2 = validatorutil.getValueAsstring (bean, sproperty2);

IF (! genericvalidator.isblankornull (value) {try {if (! value.equals (value2)) {Errors.Add (Field.getKey (), Resources.getActionError (Request, Va, Field); Return False;} } Catch (Exception E) {Errors.Add (Field.getKey (), Resources.getActionError (Request, Va, Field)); Return False;}} Return true;}} 2. Write a Validator-Rules file, add a self Define the configuration of the checker:

Field.value; secondValue = secondfield.value;}}}}} {if (i == 0) {FOCUSFIELD = Field;} Fields [i ] = OTWOFIELDS [X] [1]; bvalid = false;} }}}}} {FOCUSFIELD.FOCUS (); Alert (Fields.Join ('/ n'));}}}}]> 3. Write JSP page

The Form is included in the field to be custom verified. Here is the two password type INPUT, the verifier will match the two fields entered by the user. If it is inconsistent, you will tell the user by pop-up dialog box:

<% @ Taglib URI = "/ Web-INF / STRUTS-Bean.TLD" prefix = "bean"%> <% @ Taglib URI = "/ Web-INF / STRUTS-HTML.TLD" prefix = "html"%> <% @ Page ContentType = "Text / HTML; Charset = GBK"%>