Question

我想用struts2在display标签中创建编辑，删除链接。这是我的jsp代码

<%@ page contentType="text/html; charset=UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<%@taglib uri="http://displaytag.sf.net" prefix="display" %>
<html>
<head>

    <title>Contact Manager - display tag Example</title>
    <link href="css/style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<display:table  name="contactList" requestURI="" pagesize="10" export="true" cellpadding="1" uid="sr"  cellspacing="1" size="50"
    defaultorder="ascending" sort="list" style="width:850"
     id="row">
            <display:column property="id" title="serial no" sortable="true"   />
            <display:column property="lastName" title="TV Show" sortable="true"   />
            <display:column property="firstName" title="User Name" sortable="true"  />
            <display:column property="emailId" title="Email Id" sortable="true"  />

            <display:column media="html"
    title="Delete"
    style="text-align:center">
    <s:url id="deleteUrl" action="deleteLink">
    <s:param name="id1" value="#attr.row.id" />
    </s:url>
    <s:a href="%{deleteUrl}">
         Delete
    </s:a>
</display:column>

<display:column media="html"
title="edit"
style="text-align:center">
<a href="deleteLink?id=<s:property value="id"/>">edit</a>
</display:column>

             <display:setProperty name="export.excel.filename" value="ActorDetails.xls"/>
            <display:setProperty name="export.pdf.filename" value="ActorDetails.pdf"/>
            <display:setProperty name="export.pdf" value="true" />
        </display:table>



</body>
</html>

这是我的动作类：

    package net.viralpatel.contact.view;

    import java.util.List;

    import net.viralpatel.contact.controller.ContactManager;
    import net.viralpatel.contact.model.Contact;

    import com.opensymphony.xwork2.ActionSupport;


    public class ContactAction extends ActionSupport implements ModelDriven<Contact>,Preparable {

        private static final long serialVersionUID = 9149826260758390091L;

        private Contact contact;
        private List<Contact> contactList;


        private ContactManager linkController;

        public ContactAction() {
            linkController = new ContactManager();
        }



        public String getRecords()
        {
            contactList =linkController.lSist();

            return SUCCESS;
        } 

        public String deleteRecord()
        {
           System.out.println(contact.getId());

            return SUCCESS;
        } 

        public Contact getContact() {
            return contact;
        }

        public List<Contact> getContactList() {
            return contactList;
        }

        public void setContact(Contact contact) {
            this.contact = contact;
        }

        public void setContactList(List<Contact> contactsList) {
            this.contactList = contactsList;
        }


@Override
    public Contact getModel() {

        return contact;
    }

    @Override
    public void prepare() throws Exception {
        // TODO Auto-generated method stub
        contact = new Contact();
    }
    }

如何将我从jsp页面删除的行中的属性值获取到ContactAction类中的deleteRecord（）方法？在这里声明

System.out.println("ID IS "+contact.getId());

给出一个输出：ID IS null

请提出一些解决方案。

由于

这是Contact bean

package net.viralpatel.contact.model;

import java.io.Serializable;
import java.sql.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="Contacts")
public class Contact implements Serializable{

    private static final long serialVersionUID = -8767337896773261247L;

    private Long id;
    private String firstName;
    private String lastName;
    private String emailId;
    private String cellNo;
    private Date birthDate;
    private String website;

    private Date created;

    @Id
    @GeneratedValue
    @Column(name="id")
    public Long getId() {
        return id;
    }
    @Column(name="firstname")
    public String getFirstName() {
        return firstName;
    }
    @Column(name="lastname")
    public String getLastName() {
        return lastName;
    }
    @Column(name="email_id")
    public String getEmailId() {
        return emailId;
    }
    @Column(name="cell_no")
    public String getCellNo() {
        return cellNo;
    }
    @Column(name="birthdate")
    public Date getBirthDate() {
        return birthDate;
    }
    @Column(name="website")
    public String getWebsite() {
        return website;
    }
    @Column(name="created")
    public Date getCreated() {
        return created;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }
    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
    public void setEmailId(String emailId) {
        this.emailId = emailId;
    }
    public void setCellNo(String cellNo) {
        this.cellNo = cellNo;
    }
    public void setBirthDate(Date birthDate) {
        this.birthDate = birthDate;
    }
    public void setCreated(Date created) {
        this.created = created;
    }
    public void setWebsite(String website) {
        this.website = website;
    }
}

Answer 1

您可以使用

#attr.uidOfYourTable.property

在你的情况下

<display:column media="html" title="edit" style="text-align:center">
   <a href="deleteLink?id=<s:property value="#attr.sr.id"/>">edit</a>
</display:column>

（省略您的编辑链接指向DeleteLink操作的事实：o）

Answer 2

以下是the documentation关于display：table tag：

的内容

id：见“uid”。

uid：用于标识此表的唯一ID。 表示当前行的对象也会以此名称添加到pageContext中，以便您可以使用$ {uid} 在列体中引用它。您还可以使用uid_rowNum来引用当前行号。同一页面中的两个表不能具有相同的ID（分页和排序会影响两者）。如果没有指定“htmlId”，则相同的值将用于生成的表的html id。

（强调我的）

因此，在您的代码中选择id和uid（并且不要指定两次ID，而不是同时使用两者），然后（假设您保留uid），请使用$ {sr}来引用当前元素：

<s:param name="id1" value="${sr.id}" />

Answer 3

这里，我们可以使用<s:bean>来实例化bean类，然后<s:param>充当setter方法，可以使用bean类的getter方法在action类中检索其值接触

<display:column media="html"
    title="Delete"
    style="text-align:center">
    <s:url id="deleteUrl" action="deleteLink">
    <s:bean name="net.viralpatel.contact.model.Contact"></s:bean>
    <s:param name="id" value="#attr.row.id"></s:param>
    <s:param name="firstName" value="#attr.row.firstName"></s:param>
    </s:url>
    <s:a href="%{deleteUrl}">
         Delete
    </s:a>
</display:column>

Answer 4

你可以这样写：

     <display:column property="status" title="Status" sortable="true" paramId="aid" paramProperty="aid" href="/MsgSystem/adminread" />

如何使用display tag从struts2中的jsp将要删除/编辑的行中的值传递给action类？

4 个答案: