jsp中未显示操作错误 [英] Action errors are not being displayed in jsp
本文介绍了jsp中未显示操作错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我开发了一个jsp页面，其中需要提供用户详细信息.这是jsp
I have developed a jsp page where user details needed to be given. Here is the jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Register</title>
<link rel="stylesheet" type="text/css" href="styles.css" />
</head>
<body>
<div id="form_container" align="center">
<div class="errorMessages" >
<s:actionerror/>
</div>
<s:if test="hasActionMessages()" > <!-- Print action messages if any -->
<div class="successMessages" >
<s:actionmessage/>
</div>
</s:if>
<s:form action="registerOphthalmologist" method="post">
<s:hidden key="role" label="role" value="O" />
<s:textfield key="username" label="Choose UserName" required="true"/>
<s:password key="password" label="Choose Password" required="true"/>
<s:textfield key="givenName" label="Name" required="true"/>
<s:textfield key="surname" label="Surname" required="true"/>
<s:textfield key="age" label="Age" required="true" value=""/>
<s:select key="gender" label="Gender"
list="#{'M':'Male','F':'Female'}"
required="true"/>
<s:textfield key="contactNumber" name="contactNumber" label="Contact Number" required="true"/>
<s:textfield key="email" name="email" label="email" required="true"/>
<s:textfield key="city" name="city" label="City" required="true"/>
<s:textfield key="district" name="district" label="District" required="true"/>
<s:textfield key="state" name="state" label="State" required="true"/>
<s:textfield key="country" name="country" label="country" required="true"/>
<s:textfield key="postalCode" name="postalCode" label="Postal Code" required="true"/>
<s:textfield key="degree" label="Qualification" required="true"/>
<s:textfield key="university" label="University" required="true" value=""/>
<s:textfield key="hospitalName" label="Hospital Name" required="true"/>
<s:textfield key="experience" label="Years of Experience" required="true" value=""/>
<s:checkbox key="checkMe" fieldValue="true" label="Agree to terms & Conditions"/>
<s:submit value="Register" align="center"/>
</s:form>
</div>
<div class="footer">
<p align="center">Designed and maintained by SSSIHL</p>
</div>
这将转到以下操作文件.
This goes to the following action file.
package com.ActionClasses;
import com.Daos.RegisterDao;
import com.Daos.UsernameAvailabilty;
import com.Beans.RegisterBeans;
import com.mysql.jdbc.StringUtils;
import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
@SuppressWarnings("serial")
public class RegisterAction extends ActionSupport implements Action,ModelDriven<RegisterBeans>
{
RegisterBeans registerBeans = new RegisterBeans();
public void validate(){
System.out.println("came here "+ registerBeans.getUsername());
if (StringUtils.isNullOrEmpty(registerBeans.getUsername()))
{
System.out.println("username not found "+ registerBeans.getUsername());
addFieldError("username","Username is required");
return;
}
/*boolean Available = UsernameAvailabilty.check(registerBeans.getUsername());
if(!Available){
System.out.println("username not available "+ registerBeans.getUsername());
addFieldError("username","Username is not available");
return;
}
*/
}
public String execute() throws Exception{
if(RegisterDao.save(registerBeans) == 4) /*For every registration 4 tables will be filled in database*/
return SUCCESS;
return ERROR;
}
@Override
public RegisterBeans getModel() {
return registerBeans;
}
}
RegisterBeans.java包含所有getter和setter.当我在jsp中不提供任何用户名时，我可以在控制台中看到消息来到这里".但是，当控制权回到register.jsp时，错误消息没有显示在屏幕上.我做错了什么.
RegisterBeans.java contains all getters and setters. When I don't give any username in jsp, I am able to see the message "came here " in console. But when control comes back to register.jsp, the error message is not being displayed on the screen. What is the mistake I did.
我的struts.xml代码是
My struts.xml code for this is
<action name="register*" class="com.ActionClasses.RegisterAction">
<result name="success"> /login.jsp </result>
<result name="input"> /register{1}.jsp </result>
</action>
推荐答案
如果您使用的是simple主题，则不会自动呈现字段错误".
IF you are using simple Theme, the Field Errors won't be rendered automatically.
您需要自己做:
<s:textfield key="username" label="Choose UserName" required="true"/>
<s:fielderror fieldName="username" />
还请注意，如果您使用的是最新版本的Struts2，则required ="true"应该是required ="required".
Also note that required="true" should be required="required" if you are using a recent version of Struts2.
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