Validation 我们可以在Struts2 fieldexpression中使用参数调用方法吗？_Validation_Struts2_Expression

Validation 我们可以在Struts2 fieldexpression中使用参数调用方法吗？

validation struts2

Validation 我们可以在Struts2 fieldexpression中使用参数调用方法吗？,validation,struts2,expression,Validation,Struts2,Expression,我已将sturts2应用程序配置为使用验证xml进行操作。我也有现场表达工作是否可以从表达式中的操作调用方法。例如： *******和jsp页面 <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%> <%@ taglib prefix="s" uri="/struts-tags"%> <%@ taglib prefi

我已将sturts2应用程序配置为使用验证xml进行操作。我也有现场表达工作

是否可以从表达式中的操作调用方法。例如：

*******和jsp页面

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%@ taglib prefix="sj" uri="/struts-jquery-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<s:form name="formtest" action="Test2Action">
<s:actionerror/>
<s:fielderror></s:fielderror>
<s:textfield name="tbox1" label="box1"></s:textfield>
<s:textfield name="tbox2" label="box1"></s:textfield>
<s:textfield name="user.username" label="boxuser"></s:textfield>
<s:submit></s:submit>
</s:form>
</body>
</html>


在此处插入标题

查看我更新的工作验证程序文件。对于fieldexpression中的字段tbox1，我直接引用该方法，因为它是我的操作，将在VS上。 tbox1和user.username是jsp页面上的项目（也存在于操作中）

我试着用静态方法进行实验，但没有成功，（现在没有时间进行研究）。希望这有帮助
谢谢戴夫的意见。

****更新的验证xml

<!DOCTYPE validators PUBLIC  
            "-//OpenSymphony Group//XWork Validator 1.0.2//EN"  
            "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
<validators>
    <field name="tbox1">
        <field-validator type="fieldexpression">
            <param name="expression"><![CDATA[isCaptchaOk(tbox1, user.username)]]></param>
            <message>function call message here</message>
        </field-validator>
    </field>
    <field name="tbox2">
        <field-validator type="fieldexpression">
            <param name="expression"><![CDATA[(@uk.co.nhbc.userRegistration.action.Test2Action@isFuncOk(tbox2))]]></param>
            <message>func okk function call message here</message>
        </field-validator>
    </field>
    <field name="user.username">
        <field-validator type="fieldexpression">
            <param name="expression"><![CDATA[(!(tbox2 == "aa" && user.username.equals("")))]]></param>
            <message>tbox2 eq aa and username is empty messssage2 here</message>
        </field-validator>

    </field>

</validators>

为了在表达式（必须是OGNL）中调用静态方法，您应该通过向struts.xml文件添加以下常量来启用struts.OGNL.allowStaticMethodAccess：

你试过了吗？（我很确定你的意思是“比我女朋友的还多”，除非你交易人。）hy Dave，是的，我试过了，我已经在上面添加了我的实际（原始）测试代码文件。不，它没有，请查看我的代码，并请指出我们的任何错误是

按键串

和

用户响应

？（请注意，我不确定静态方法调用是否有效。您的配置中是否启用了静态方法？）

package uk.co.nhbc.userRegistration.action;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import uk.co.nhbc.common.action.BaseAction;
import uk.co.nhbc.userRegistration.model.Users;

public class Test2Action extends BaseAction {
    private String tbox1;
    private String tbox2;
    private Users user;
    private static final Log log = LogFactory.getLog(Test2Action.class);

    public String execute() {
        return SUCCESS;
    }

    public String getTbox2() {
        return tbox2;
    }

    public void setTbox2(String tbox2) {
        this.tbox2 = tbox2;
    }

    public String getTbox1() {
        return tbox1;
    }

    public void setTbox1(String tbox1) {
        this.tbox1 = tbox1;
    }

    public Users getUser() {
        log.debug("get user called");
        return user;
    }

    public void setUser(Users user) {
        log.debug("set user called");
        this.user = user;
    }

    public boolean isCaptchaOk(String challenge, String response) {
        //dummy test function
        log.debug("captcha function called");
        if (response.equals("true"))
            return true;
        return false;

    }
    public String getString (){
        log.debug("getString function called");
        return "hello";

    }

}

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%@ taglib prefix="sj" uri="/struts-jquery-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<s:form name="formtest" action="Test2Action">
<s:actionerror/>
<s:fielderror></s:fielderror>
<s:textfield name="tbox1" label="box1"></s:textfield>
<s:textfield name="tbox2" label="box1"></s:textfield>
<s:textfield name="user.username" label="boxuser"></s:textfield>
<s:submit></s:submit>
</s:form>
</body>
</html>

<!DOCTYPE validators PUBLIC  
            "-//OpenSymphony Group//XWork Validator 1.0.2//EN"  
            "http://struts.apache.org/dtds/xwork-validator-1.0.2.dtd">
<validators>
    <field name="tbox1">
        <field-validator type="fieldexpression">
            <param name="expression"><![CDATA[isCaptchaOk(tbox1, user.username)]]></param>
            <message>function call message here</message>
        </field-validator>
    </field>
    <field name="tbox2">
        <field-validator type="fieldexpression">
            <param name="expression"><![CDATA[(@uk.co.nhbc.userRegistration.action.Test2Action@isFuncOk(tbox2))]]></param>
            <message>func okk function call message here</message>
        </field-validator>
    </field>
    <field name="user.username">
        <field-validator type="fieldexpression">
            <param name="expression"><![CDATA[(!(tbox2 == "aa" && user.username.equals("")))]]></param>
            <message>tbox2 eq aa and username is empty messssage2 here</message>
        </field-validator>

    </field>

</validators>

package uk.co.nhbc.userRegistration.action;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import uk.co.nhbc.common.action.BaseAction;
import uk.co.nhbc.userRegistration.model.Users;

public class Test2Action extends BaseAction {
    private String tbox1;
    private String tbox2;
    private Users user;
    private static final Log log = LogFactory.getLog(Test2Action.class);

    public String execute() {
        return SUCCESS;
    }

    public String getTbox2() {
        return tbox2;
    }

    public void setTbox2(String tbox2) {
        this.tbox2 = tbox2;
    }

    public String getTbox1() {
        return tbox1;
    }

    public void setTbox1(String tbox1) {
        this.tbox1 = tbox1;
    }

    public Users getUser() {
        log.debug("get user called");
        return user;
    }

    public void setUser(Users user) {
        log.debug("set user called");
        this.user = user;
    }

    public boolean isCaptchaOk(String challenge, String response) {
        //dummy test function
        log.debug("captcha function called");
        log.debug("captcha function called"+challenge+response);
        if (response.equals("true"))
            return true;
        return false;

    }
    public String getString (){
        log.debug("getString function called");
        return "hello";

    }

    public static boolean isFuncOk (String response){
        log.debug("isFuncOk function called"+response);
        if (response.equals("true"))
            return true;
        return false;

    }

}