Can';t将隐藏项映射到javabean struts2 我有一个动态表单供用户输入他们的教育信息。一个用户可以有多个教育信息。我使用隐藏字段来存储用户的教育ID。但看起来隐藏字段无法映射到javabean项。当我提交包含现有项的表单时,服务器端该项的ID始终为0,而不是其实际ID 我想为用户提供删除和取消删除项目的能力。当用户删除一个项目时,我将所有元素设置为display:none,并将一个隐藏字段值设置为true(这个隐藏字段旨在让我知道在迭代列表时删除了哪个项目)。但当我提交表单时,javabean列表中被删除的项取空值
那么,我如何将隐藏元素映射到javabean对象,或者有另一种方法来实现我的概念呢 这是我的密码: jsp: 插入数据:Can';t将隐藏项映射到javabean struts2 我有一个动态表单供用户输入他们的教育信息。一个用户可以有多个教育信息。我使用隐藏字段来存储用户的教育ID。但看起来隐藏字段无法映射到javabean项。当我提交包含现有项的表单时,服务器端该项的ID始终为0,而不是其实际ID 我想为用户提供删除和取消删除项目的能力。当用户删除一个项目时,我将所有元素设置为display:none,并将一个隐藏字段值设置为true(这个隐藏字段旨在让我知道在迭代列表时删除了哪个项目)。但当我提交表单时,javabean列表中被删除的项取空值,java,struts2,Java,Struts2,那么,我如何将隐藏元素映射到javabean对象,或者有另一种方法来实现我的概念呢 这是我的密码: jsp: 插入数据: package com.education.serivces; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.apache.log4j.Logger; import org.hibernate.Query; import org.hibern
package com.education.serivces;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.log4j.Logger;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import com.education.bean.Education;
import com.education.utils.HibernateUltils;
public class DataConnect {
Session sess;
Transaction transaction;
List<Education> educations;
private Logger logger = Logger.getLogger(this.getClass());
public void inserEducation(List<Education> edu)
{
try
{
sess = HibernateUltils.getSession();
transaction = sess.beginTransaction();
for(Iterator<Education> educations = edu.iterator(); educations.hasNext();)
{
Education education = educations.next();
sess.saveOrUpdate(education);
}
transaction.commit();
}
catch (Exception e)
{
transaction.rollback();
logger.error(e);
}
finally
{
sess.close();
}
}
@SuppressWarnings({ "unchecked", "finally" })
public List<Education> getEducation()
{
try
{
sess = HibernateUltils.getSession();
sess.beginTransaction();
Query query = sess.createQuery("from Education");
this.educations = (List<Education>) query.list();
}
catch(Exception e)
{
logger.error(e);
}
finally
{
sess.close();
return educations;
}
}
}
package com.education.serivces;
导入java.util.ArrayList;
导入java.util.Iterator;
导入java.util.List;
导入org.apache.log4j.Logger;
导入org.hibernate.Query;
导入org.hibernate.Session;
导入org.hibernate.Transaction;
导入com.education.bean.education;
导入com.education.utils.HibernateUltils;
公共类数据连接{
会议sess;
交易;
列出教育;
私有记录器=Logger.getLogger(this.getClass());
公共空间减少(列表edu)
{
尝试
{
sess=HibernateUltils.getSession();
事务=sess.beginTransaction();
for(Iterator educations=edu.Iterator();educations.hasNext();)
{
教育=教育。下一步();
sess.saveOrUpdate(教育);
}
commit();
}
捕获(例外e)
{
transaction.rollback();
错误(e);
}
最后
{
sess.close();
}
}
@SuppressWarnings({“unchecked”,“finally”})
公众教育(
{
尝试
{
sess=HibernateUltils.getSession();
sess.beginTransaction();
Query Query=sess.createQuery(“来自教育”);
this.educations=(List)query.List();
}
捕获(例外e)
{
错误(e);
}
最后
{
sess.close();
回归教育;
}
}
}
我建议您在服务器端只保留一个名为indexesToRemove的单独字符串变量,并将其映射到jsp中的一个隐藏值。
它将使用一些分隔符分隔已删除的EduId的值
例:2-5-8意味着EduID 2、5和8必须从列表中删除。
现在,每次用户删除/取消删除时,您都可以使用JS代码修改它的值
使用此字符串值,您可以在提交时处理列表,或者根据需要处理某些服务器端操作
关于第一部分:
我不知道隐藏值不能映射到JavaBean属性的任何限制。我想问题是你有:
<input type="hidden" name="education[${ status.index }].eduID" value="${ educations[status.index].index }" />
为什么不是:
value=“${educations[status.index].eduID}”
?理论上可以,我试试看。你对问题1有什么想法吗?每当我试图提交一个包含已存在项的表单时,该项的ID
总是为0。哦,我的错。我太笨拙了,非常感谢你指出了我的问题,但它仍然不能解决问题:D。我使用<代码>教育>代码>而不是<代码>教育> /代码>,它是错错:请考虑用更少的代码来说明你的问题。对不起,事实上,我不知道哪一部分是错的,所以我试着给大家尽可能多的信息
package com.education.actions;
import java.util.List;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;
import com.education.bean.Education;
import com.education.dao.DataConnectDao;
import com.opensymphony.xwork2.ActionSupport;
public class SaveEdu extends ActionSupport
{
/**
*
*/
private static final long serialVersionUID = 1L;
private List<Education> educations;
public List<Education> getEducations() {
return educations;
}
public void setEducations(List<Education> educations) {
this.educations = educations;
}
@Action(value="/save", results={
@Result(name="success", type="redirect", location="/list.action"),
@Result(name="input", type="redirect", location="/list.action")
})
public String execute()
{
DataConnectDao connect = new DataConnectDao();
connect.insertDetailDao(this.educations);
return SUCCESS;
}
}
package com.education.bean;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
public class Education {
@GeneratedValue(strategy=GenerationType.AUTO)
private int eduID;
private String school;
private String degree;
private float scored;
private String startDate;
private String endDate;
private int index;
private boolean deleted;
public Education()
{
deleted = false;
}
public int getEduID() {
return eduID;
}
public void setEduID(int eduID) {
this.eduID = eduID;
}
public String getSchool() {
return school;
}
public void setSchool(String school) {
this.school = school;
}
public String getDegree() {
return degree;
}
public void setDegree(String degree) {
this.degree = degree;
}
public float getScored() {
return scored;
}
public void setScored(float scored) {
this.scored = scored;
}
public String getStartDate() {
return startDate;
}
public void setStartDate(String startDate) {
this.startDate = startDate;
}
public String getEndDate() {
return endDate;
}
public void setEndDate(String endDate) {
this.endDate = endDate;
}
public int getIndex() {
return index;
}
public void setIndex(int index) {
this.index = index;
}
public boolean isDeleted() {
return deleted;
}
public void setDeleted(boolean deleted) {
this.deleted = deleted;
}
}
package com.education.serivces;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.log4j.Logger;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import com.education.bean.Education;
import com.education.utils.HibernateUltils;
public class DataConnect {
Session sess;
Transaction transaction;
List<Education> educations;
private Logger logger = Logger.getLogger(this.getClass());
public void inserEducation(List<Education> edu)
{
try
{
sess = HibernateUltils.getSession();
transaction = sess.beginTransaction();
for(Iterator<Education> educations = edu.iterator(); educations.hasNext();)
{
Education education = educations.next();
sess.saveOrUpdate(education);
}
transaction.commit();
}
catch (Exception e)
{
transaction.rollback();
logger.error(e);
}
finally
{
sess.close();
}
}
@SuppressWarnings({ "unchecked", "finally" })
public List<Education> getEducation()
{
try
{
sess = HibernateUltils.getSession();
sess.beginTransaction();
Query query = sess.createQuery("from Education");
this.educations = (List<Education>) query.list();
}
catch(Exception e)
{
logger.error(e);
}
finally
{
sess.close();
return educations;
}
}
}
<input type="hidden" name="education[${ status.index }].eduID" value="${ educations[status.index].index }" />