java - 如何在 Struts 2 和 JSP 的 Action 类中仅获取选定复选框的值

标签 java jsp checkbox struts2 checked

我正在显示 24 个复选框。我想获取操作类中选中复选框的所有值，并将其作为新记录插入到数据库中。一旦我在单击按钮时成功获取选中复选框的值，就会完成插入。

我提到了 this我在其中遵循史蒂文先生回答的答案的链接，但借助该链接我只能显示 boolean 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 类

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 Action 类

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..");
        }

    }

}

最佳答案

value属性不应为空 value="" .如果您遵循链接的答案，您会看到 s:checkbox使用标签。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。并评论 Dave Newton 在他的书中的通知“它应该具有值 true 或 false 目前唯一可行的值。这些是唯一可以与 checkbox 拦截器一起正常工作的值。”

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 ，它正在使用这样的 fieldValue属性。

如果您想深入了解如何 checkbox拦截器正在工作你可以阅读 <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 .不同于 s:checkbox它不适用于任何未经检查的值，您可以使用 listKey 直接映射值和 listValue属性。

关于java - 如何在 Struts 2 和 JSP 的 Action 类中仅获取选定复选框的值，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37027868/

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