如何在 Struts 2 和 JSP 中的 Action class 中仅获取选定复选框的值

Question

我显示了 24 个复选框。我想获取已选中复选框的所有值 class 并将其作为新记录插入 database.Inserting 一旦我在单击按钮时成功获取已选中复选框的值就会完成。

我提到了 this link，其中我遵循了史蒂文先生回答的答案，但借助于此我只能显示布尔值，但在这里我想要选中复选框的文本值。

下面是我的 JSP 页面。

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
    <%@taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
</head>
<body>
<s:form action="eventInsertAction">
        <!-- Main content -->
        <section class="content">
          <!-- Small boxes (Stat box) -->
          
          
          <div class="row">
            <div class="contetpanel">
                <div>
                    <div class="crevtbl"> 
                        <div class="crevtblRow"> 
                            <div class="crevtblCell">Event Name</div> 
                            <div class="crevtblCell1">:</div> 
                            <div class="crevtblCell2"><input name="event.eventName" class="formtextfield" type="text"><s:fielderror fieldName="event.eventName"/></div> 
                        </div>
                        <div class="crevtblRow"> 
                            <div class="crevtblCell">Company Name</div> 
                            <div class="crevtblCell1">:</div> 
                            <div class="crevtblCell2"><input name="event.companyName" class="formtextfield" type="text" ><s:fielderror fieldName="event.companyName"/></div> 
                        </div>
                        <div class="crevtblRow"> 
                            <div class="crevtblCell">Contact Person Name</div> 
                            <div class="crevtblCell1">:</div> 
                            <div class="crevtblCell2"><input name="event.contactPerson" class="formtextfield" type="text" ><s:fielderror fieldName="event.contactPerson"/></div> 
                        </div>
                        <div class="crevtblRow"> 
                            <div class="crevtblCell">Contact</div> 
                            <div class="crevtblCell1">:</div> 
                            <div class="crevtblCell2"><input name="event.contactNumber" class="formtextfield" type="text" ><s:fielderror fieldName="event.contactNumber"/></div> 
                        </div>
                        <div class="crevtblRow"> 
                            <div class="crevtblCell">Email</div> 
                            <div class="crevtblCell1">:</div> 
                            <div class="crevtblCell2"><input name="event.emailId" class="formtextfield" type="text" ><s:fielderror fieldName="event.emailId"/></div> 
                        </div>
                        <div class="crevtblRow"> 
                            <div class="crevtblCell">Event Venue</div> 
                            <div class="crevtblCell1">:</div> 
                            <div class="crevtblCell2"><input name="event.eventVenue" class="formtextfield" type="text" ><s:fielderror fieldName="event.eventVenue"/></div> 
                        </div>
                        <div class="crevtblRow"> 
                            <div class="crevtblCell">Event Date</div> 
                            <div class="crevtblCell1">:</div> 
                            <div class="crevtblCell2">From : <input name="event.fromDate" class="formtextfield1" type="text" placeholder="YYYY/MM/DD"> &nbsp; &nbsp; &nbsp; &nbsp; To : <input name="event.toDate" class="formtextfield1" type="text" placeholder="YYYY/MM/DD"></div> 
                        </div>
                        <div class="crevtblRow"> 
                            <div class="crevtblCell">Event Time</div> 
                            <div class="crevtblCell1">:</div> 
                            <div class="crevtblCell2"><input name="event.eventTime" class="formtextfield1" type="text" placeholder="HH:MM  AM/PM" ><s:fielderror fieldName="event.eventTime"/></div> 
                        </div>
                        <div class="crevtblRow">
                            <div class="crevtblCell">License Required</div> 
                            <div class="crevtblCell1">:</div> 
                            <div class="crevtblCell2">
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Rangabhoomi</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Fire NOC</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Fire Engine</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Premises &amp; NOC</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Performance</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">PWD</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Local Police</span><br />
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Collector</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">PPL</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">IPRS</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Traffic</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Liquor License</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Ticket Selling License</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">BMC Parking</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Parking</span><br />
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Port Trust</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Novex</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Foreign Artist</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">DCP Office</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Fire Marshal</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Sale Tax NOC</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Other</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Extra</span>
                            <input name="event.licenserequired" type="checkbox" class="formcheckbox" value=""><span class="formcheckbox_content">Commission</span>
                                
                            </div> 
                        </div>
                        <div class="crevtblRow"> 
                            <div class="crevtblCell"></div> 
                            <div class="crevtblCell1"></div> 
                            <div class="crevtblCell2"><button type="submit" class="btn btn-primary">Create Event</button></div> 
                        </div>
                    </div>
                </div>
            </div>
          </div>
            

            </section>
            </s:form>
</body>
</html>

下面是我的 setter 和 getter class

package com.ca.pojo;

public class Event {
    public Event() {
        // TODO Auto-generated constructor stub
    }

    private String eventName;
    private String companyName;
    private String contactPerson;
    private String contactNumber;
    private String emailId;
    private String eventVenue;
    private String fromDate;
    private String toDate;
    private String eventTime;
    private String licenserequired;
    
    public String getEventName() {
        return eventName;
    }

    public void setEventName(String eventName) {
        this.eventName = eventName;
    }

    public String getCompanyName() {
        return companyName;
    }

    public void setCompanyName(String companyName) {
        this.companyName = companyName;
    }

    public String getContactPerson() {
        return contactPerson;
    }

    public void setContactPerson(String contactPerson) {
        this.contactPerson = contactPerson;
    }

    public String getContactNumber() {
        return contactNumber;
    }

    public void setContactNumber(String contactNumber) {
        this.contactNumber = contactNumber;
    }

    public String getEmailId() {
        return emailId;
    }

    public void setEmailId(String emailId) {
        this.emailId = emailId;
    }

    public String getEventVenue() {
        return eventVenue;
    }

    public void setEventVenue(String eventVenue) {
        this.eventVenue = eventVenue;
    }

    public String getFromDate() {
        return fromDate;
    }

    public void setFromDate(String fromDate) {
        this.fromDate = fromDate;
    }

    public String getToDate() {
        return toDate;
    }

    public void setToDate(String toDate) {
        this.toDate = toDate;
    }

    public String getEventTime() {
        return eventTime;
    }

    public void setEventTime(String eventTime) {
        this.eventTime = eventTime;
    }

    public String getLicenserequired() {
        return licenserequired;
    }

    public void setLicenserequired(String licenserequired) {
        this.licenserequired = licenserequired;
    }
    
}

下面是我的操作class

package com.ca.actions;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.ca.database.Database;
import com.ca.pojo.Event;
import com.opensymphony.xwork2.ActionSupport;

public class EventInsertAction extends ActionSupport {

    private String eventId;
    Event event;
    String name;

    public EventInsertAction() {
        // TODO Auto-generated constructor stub
    }

    
    public String getName() {
        return name;
    }


    public void setName(String name) {
        this.name = name;
    }


    public String getEventId() {
        return eventId;
    }

    public void setEventId(String eventId) {
        this.eventId = eventId;
    }

    public Event getEvent() {
        return event;
    }

    public void setEvent(Event event) {
        this.event = event;
    }

    @Override
    public String execute() throws Exception {
        
        System.out.println("Event"+event.getLicenserequired());

        // TODO Auto-generated method stub
        System.out.println("Hi Mahi"+name);

        List<Integer> ints = new ArrayList<Integer>();
        int i = 0;

        for (int i1 = 0; i1 < 10000; i1++) {
            ints.add(i1);
        }
        // Collections.shuffle(ints);

        String Id = String.valueOf(ints.get(i++));

        eventId = event.getEventName() + Id;
    
        System.out.println(eventId);
        try {
            Database database = new Database();
            Connection con = database.Get_Connection();
            System.out.println("Driver Loaded");
            PreparedStatement st = con
                    .prepareStatement("insert into event(EVENT_ID,EVENT_NAME,COMPANY_NAME,CONTACT_PERSON,CONTACT_NO,EMAIL_ID,EVENT_VENUE,FROM_DATE,TO_DATE,EVENT_TIME)"
                            + "values(?,?,?,?,?,?,?,?,?,?)");
            st.setString(1, eventId);
            st.setString(2, event.getEventName());
            st.setString(3, event.getCompanyName());
            st.setString(4, event.getContactPerson());
            st.setString(5, event.getContactNumber());
            st.setString(6, event.getEmailId());
            st.setString(7, event.getEventVenue());
            st.setString(8, event.getFromDate());
            st.setString(9, event.getToDate());
            st.setString(10, event.getEventTime());
            st.executeUpdate();
            System.out.println("success");
            con.close();
        } catch (Exception e) {
            System.out.println(e);
        }

        return "success";
    }

    @Override
    public void validate() {
        // TODO Auto-generated method stub
        super.validate();
        if (event.getEventName().isEmpty()) {
            System.out.println("Event Name");
            addFieldError("event.eventName", "Please Enter Event Name ..");
        }
        
        if (event.getCompanyName().isEmpty()) {
            addFieldError("event.companyName", "Please Enter Company Name.. ");
        }
        
        if (event.getContactNumber().isEmpty()) {
            addFieldError("event.contactNumber",
                    "Please Enter Contact Number..");
        } else {
            String expression = "^\+?[0-9\-]+\*?$";
            CharSequence inputStr = event.getContactNumber();
            Pattern pattern = Pattern.compile(expression,
                    Pattern.CASE_INSENSITIVE);
            Matcher matcher = pattern.matcher(inputStr);
            if (!matcher.matches())
                addFieldError("event.contactNumber", "Invalid Contact Number..");

        }
        
        if (event.getContactPerson().isEmpty()) {
            addFieldError("event.contactPerson",
                    "Please Enter Contact Person Name..");
        }
        
        if (event.getEmailId().isEmpty()) {
            addFieldError("event.emailId", "Please Enter Email ID..");
        } else {
            String expression = "^[\w\-]([\.\w])+[\w]+@([\w\-]+\.)+[A-Z]{2,4}$";
            CharSequence inputStr = event.getEmailId();
            Pattern pattern = Pattern.compile(expression,
                    Pattern.CASE_INSENSITIVE);
            Matcher matcher = pattern.matcher(inputStr);
            if (!matcher.matches())
                addFieldError("event.emailId", "Invalid Email Address..");
        }
        
        if (event.getEventVenue().isEmpty()) {
            addFieldError("event.eventVenue", "Please Enter Event Venue..");
        }
        
        if (event.getFromDate().isEmpty()) {
            addFieldError("event.fromDate", "Please Enter Date..");
        }
        
        if (event.getToDate().isEmpty()) {
            addFieldError("event.toDate", "Please Enter To Date..");
        }
        
        if (event.getEventTime().isEmpty()) {
            addFieldError("event.eventTime", "Please Enter Event Time..");
        }

    }

}

Answer 1

value 属性不应为空 value=""。如果您遵循链接的答案，您会看到使用了 s:checkbox 标签。呈现此标记时，它会为已选中和未选中的复选框提供字段值。并在他的书中评论 Dave Newton 的通知 "It should have values true or false the only viable values for the moment. These are only values that work correctly with checkbox interceptor."

The tag renders a single checkbox . At the time of this writing it only works well with Boolean (or boolean) properties. Attempting to preselect a checkbox with, for example, a string value only works if the string is true or false .

有一个例子 Struts 2 checkbox example，它使用了这样的 fieldValue 属性。

如果您想深入了解 checkbox 拦截器的工作原理，您可以阅读 <s:checkbox> not auto populating in struts2 form.

另一个使用多个复选框的例子Struts 2 multiple check boxes example。与 s:checkbox 不同，它不适用于任何未经检查的值，您可以使用 listKey 和 listValue 属性直接映射值。

Answer 2

我刚刚将变量的数据类型从 boolean 更改为 string[] 。它将存储所选复选框的值。下面是我的jsp。

<s:form action="resultAction" namespace="/">

        <h2>
            <input name="checkMe" type="checkbox"
                class="formcheckbox" value="Rangabhoomi"><span
                class="formcheckbox_content">Rangabhoomi</span> 
                <input
                name="checkMe" type="checkbox" class="formcheckbox"
                value="Fire Noc"><span class="formcheckbox_content">Fire NOC</span>

        </h2>

        <input type="submit" value="Submit" />

    </s:form>

下面是我的操作class

package com.checkboxInStruts2;

import com.opensymphony.xwork2.ActionSupport;

public class CheckboxAction extends ActionSupport 
{
    private String checkMe[];

    public CheckboxAction() {
        // TODO Auto-generated constructor stub
    }

    public String[] getCheckMe() {
        return checkMe;
    }

    public void setCheckMe(String[] checkMe) {
        this.checkMe = checkMe;
    }
    @Override
    public String execute() throws Exception {
        // TODO Auto-generated method stub
        for(int i=0;i<checkMe.length;i++)
        {
            System.out.println(checkMe[i]);
        }

        return "success";
            }


}

并且为了在 jsp.It 上的标签下方显示使用，将显示所选复选框的字符串值数组。

<s:property value="checkMe"/>

如何在 Struts 2 和 JSP 中的 Action class 中仅获取选定复选框的值

How to take values of only selected checkbox in Action class in Struts 2 and JSP

java

jsp

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struts2

checked