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Java 如何在jsp中显示从hibernate查询获得的列表

java hibernate jsp struts2

Java 如何在jsp中显示从hibernate查询获得的列表,java,hibernate,jsp,struts2,xml-configuration,Java,Hibernate,Jsp,Struts2,Xml Configuration,我正在创建一个struts hibernate应用程序。我使用hibernate查询获得了一个列表，并在action类中传递了它。但我不知道如何在JSP中显示它 我已经在查询的基础上成功地获取了列表。 现在我想在JSP中显示这个列表 我已经发布了struts.xml和显示结果的JSP。 请查收。但是在JSP中什么都没有出现。 我正在使用s:iterate显示列表。但是没有运气。 甚至我也尝试过在s:iterate下打印简单文本，只是为了测试。 但它也没有出现 POJO类： package org

我正在创建一个struts hibernate应用程序。我使用hibernate查询获得了一个列表，并在action类中传递了它。但我不知道如何在JSP中显示它

我已经在查询的基础上成功地获取了列表。 现在我想在JSP中显示这个列表

我已经发布了
struts.xml
和显示结果的JSP。 请查收。但是在JSP中什么都没有出现。 我正在使用
s:iterate
显示列表。但是没有运气。 甚至我也尝试过在
s:iterate
下打印简单文本，只是为了测试。 但它也没有出现

POJO类：

package org.sachin.Model;

import java.sql.Date;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Temporal;

@Entity
@Table(name="feed")
public class FeedBack {

private FeedBack feedback;
 private int taste;
 private int waiter;
 private int infra;
 private int price;

 private int id;

 private Date date=new java.sql.Date(new java.util.Date().getTime());
public int getTaste() {
    return taste;
}
public void setTaste(int taste) {
    this.taste = taste;
}
public int getWaiter() {
    return waiter;
}
public void setWaiter(int waiter) {
    this.waiter = waiter;
}
public int getInfra() {
    return infra;
}
public void setInfra(int infra) {
    this.infra = infra;
}
public int getPrice() {
    return price;
}
public void setPrice(int price) {
    this.price = price;
}
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}


@Temporal(javax.persistence.TemporalType.DATE)
public Date getDate() {
    return date;
}
public void setDate(Date date) {
    this.date = date;
}
public FeedBack getFeedback() {
    return feedback;
}
public void setFeedback(FeedBack feedback) {
    this.feedback = feedback;
}


}

package org.sachin.action;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.sachin.Model.Datepicker;
import org.sachin.Model.FeedBack;
import org.sachin.hibernate.DateSpecific;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class SelectDateAction extends ActionSupport {

    /**
     * 
     */
private static final long serialVersionUID = -8922465133057293868L;
private Datepicker datepicker;
private List<FeedBack> list =new ArrayList<>();;

    public List<FeedBack> getList() {
    return list;
}
public void setList(List<FeedBack> list) {
    this.list = list;
}
    public String execute(){

        String date=getDatepicker().getDate1();


        DateSpecific da=new DateSpecific();

         list=da.find(date);
         for(FeedBack feed:list){
             System.out.println("price");
             System.out.println(feed.getPrice());


         }

        System.out.println("hi"+date);

        return SUCCESS;
    }


    public Datepicker getDatepicker() {
        return datepicker;
    }
    public void setDatepicker(Datepicker datepicker) {
        this.datepicker = datepicker;
    }

}

public List<FeedBack> find(String Date) {


                //  Transaction t=session.beginTransaction(); 

            String SQL_QUERY = " from FeedBack where date='"+Date+"'";
            System.out.println("i am in hiber");
            System.out.println(SQL_QUERY);
            org.hibernate.Query query = session.createQuery(SQL_QUERY);
            List<FeedBack> list = query.list();
          for(FeedBack f:list){
              System.out.println("price");
              System.out.println(f.getPrice());
          }
            return list;

        }

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<s:form>
<body>
 <h1>Struts 2 Iterator tag example</h1>

<h3>Simple Iterator</h3>
<ol>
<s:iterator value="list">
 HE<li><s:property /></li>
</s:iterator>
</ol>
  </body>
  </s:form>
  </html>
动作类：

package org.sachin.Model;

import java.sql.Date;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Temporal;

@Entity
@Table(name="feed")
public class FeedBack {

private FeedBack feedback;
 private int taste;
 private int waiter;
 private int infra;
 private int price;

 private int id;

 private Date date=new java.sql.Date(new java.util.Date().getTime());
public int getTaste() {
    return taste;
}
public void setTaste(int taste) {
    this.taste = taste;
}
public int getWaiter() {
    return waiter;
}
public void setWaiter(int waiter) {
    this.waiter = waiter;
}
public int getInfra() {
    return infra;
}
public void setInfra(int infra) {
    this.infra = infra;
}
public int getPrice() {
    return price;
}
public void setPrice(int price) {
    this.price = price;
}
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}


@Temporal(javax.persistence.TemporalType.DATE)
public Date getDate() {
    return date;
}
public void setDate(Date date) {
    this.date = date;
}
public FeedBack getFeedback() {
    return feedback;
}
public void setFeedback(FeedBack feedback) {
    this.feedback = feedback;
}


}

package org.sachin.action;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.sachin.Model.Datepicker;
import org.sachin.Model.FeedBack;
import org.sachin.hibernate.DateSpecific;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class SelectDateAction extends ActionSupport {

    /**
     * 
     */
private static final long serialVersionUID = -8922465133057293868L;
private Datepicker datepicker;
private List<FeedBack> list =new ArrayList<>();;

    public List<FeedBack> getList() {
    return list;
}
public void setList(List<FeedBack> list) {
    this.list = list;
}
    public String execute(){

        String date=getDatepicker().getDate1();


        DateSpecific da=new DateSpecific();

         list=da.find(date);
         for(FeedBack feed:list){
             System.out.println("price");
             System.out.println(feed.getPrice());


         }

        System.out.println("hi"+date);

        return SUCCESS;
    }


    public Datepicker getDatepicker() {
        return datepicker;
    }
    public void setDatepicker(Datepicker datepicker) {
        this.datepicker = datepicker;
    }

}

public List<FeedBack> find(String Date) {


                //  Transaction t=session.beginTransaction(); 

            String SQL_QUERY = " from FeedBack where date='"+Date+"'";
            System.out.println("i am in hiber");
            System.out.println(SQL_QUERY);
            org.hibernate.Query query = session.createQuery(SQL_QUERY);
            List<FeedBack> list = query.list();
          for(FeedBack f:list){
              System.out.println("price");
              System.out.println(f.getPrice());
          }
            return list;

        }

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<s:form>
<body>
 <h1>Struts 2 Iterator tag example</h1>

<h3>Simple Iterator</h3>
<ol>
<s:iterator value="list">
 HE<li><s:property /></li>
</s:iterator>
</ol>
  </body>
  </s:form>
  </html>
这是我用来显示列表的JSP

iterate.jsp
：

package org.sachin.Model;

import java.sql.Date;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Temporal;

@Entity
@Table(name="feed")
public class FeedBack {

private FeedBack feedback;
 private int taste;
 private int waiter;
 private int infra;
 private int price;

 private int id;

 private Date date=new java.sql.Date(new java.util.Date().getTime());
public int getTaste() {
    return taste;
}
public void setTaste(int taste) {
    this.taste = taste;
}
public int getWaiter() {
    return waiter;
}
public void setWaiter(int waiter) {
    this.waiter = waiter;
}
public int getInfra() {
    return infra;
}
public void setInfra(int infra) {
    this.infra = infra;
}
public int getPrice() {
    return price;
}
public void setPrice(int price) {
    this.price = price;
}
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}


@Temporal(javax.persistence.TemporalType.DATE)
public Date getDate() {
    return date;
}
public void setDate(Date date) {
    this.date = date;
}
public FeedBack getFeedback() {
    return feedback;
}
public void setFeedback(FeedBack feedback) {
    this.feedback = feedback;
}


}

package org.sachin.action;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.sachin.Model.Datepicker;
import org.sachin.Model.FeedBack;
import org.sachin.hibernate.DateSpecific;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class SelectDateAction extends ActionSupport {

    /**
     * 
     */
private static final long serialVersionUID = -8922465133057293868L;
private Datepicker datepicker;
private List<FeedBack> list =new ArrayList<>();;

    public List<FeedBack> getList() {
    return list;
}
public void setList(List<FeedBack> list) {
    this.list = list;
}
    public String execute(){

        String date=getDatepicker().getDate1();


        DateSpecific da=new DateSpecific();

         list=da.find(date);
         for(FeedBack feed:list){
             System.out.println("price");
             System.out.println(feed.getPrice());


         }

        System.out.println("hi"+date);

        return SUCCESS;
    }


    public Datepicker getDatepicker() {
        return datepicker;
    }
    public void setDatepicker(Datepicker datepicker) {
        this.datepicker = datepicker;
    }

}

public List<FeedBack> find(String Date) {


                //  Transaction t=session.beginTransaction(); 

            String SQL_QUERY = " from FeedBack where date='"+Date+"'";
            System.out.println("i am in hiber");
            System.out.println(SQL_QUERY);
            org.hibernate.Query query = session.createQuery(SQL_QUERY);
            List<FeedBack> list = query.list();
          for(FeedBack f:list){
              System.out.println("price");
              System.out.println(f.getPrice());
          }
            return list;

        }

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<s:form>
<body>
 <h1>Struts 2 Iterator tag example</h1>

<h3>Simple Iterator</h3>
<ol>
<s:iterator value="list">
 HE<li><s:property /></li>
</s:iterator>
</ol>
  </body>
  </s:form>
  </html>


Struts 2迭代器标记示例
简单迭代器
他
  •
    我已经在查询的基础上成功地获取了列表。 现在我想在JSP中显示此列表。

    使用标记：

    迭代器将迭代一个值。iterable值可以是以下任意值： 
    java.util.Collection
    ，
    java.util.Iterator
    ，
    java.util.Enumeration
    ， 
    java.util.Map
    ，或数组

    代码：

    package org.sachin.Model;

import java.sql.Date;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Temporal;

@Entity
@Table(name="feed")
public class FeedBack {

private FeedBack feedback;
 private int taste;
 private int waiter;
 private int infra;
 private int price;

 private int id;

 private Date date=new java.sql.Date(new java.util.Date().getTime());
public int getTaste() {
    return taste;
}
public void setTaste(int taste) {
    this.taste = taste;
}
public int getWaiter() {
    return waiter;
}
public void setWaiter(int waiter) {
    this.waiter = waiter;
}
public int getInfra() {
    return infra;
}
public void setInfra(int infra) {
    this.infra = infra;
}
public int getPrice() {
    return price;
}
public void setPrice(int price) {
    this.price = price;
}
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
public int getId() {
    return id;
}
public void setId(int id) {
    this.id = id;
}


@Temporal(javax.persistence.TemporalType.DATE)
public Date getDate() {
    return date;
}
public void setDate(Date date) {
    this.date = date;
}
public FeedBack getFeedback() {
    return feedback;
}
public void setFeedback(FeedBack feedback) {
    this.feedback = feedback;
}


}

    package org.sachin.action;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.sachin.Model.Datepicker;
import org.sachin.Model.FeedBack;
import org.sachin.hibernate.DateSpecific;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class SelectDateAction extends ActionSupport {

    /**
     * 
     */
private static final long serialVersionUID = -8922465133057293868L;
private Datepicker datepicker;
private List<FeedBack> list =new ArrayList<>();;

    public List<FeedBack> getList() {
    return list;
}
public void setList(List<FeedBack> list) {
    this.list = list;
}
    public String execute(){

        String date=getDatepicker().getDate1();


        DateSpecific da=new DateSpecific();

         list=da.find(date);
         for(FeedBack feed:list){
             System.out.println("price");
             System.out.println(feed.getPrice());


         }

        System.out.println("hi"+date);

        return SUCCESS;
    }


    public Datepicker getDatepicker() {
        return datepicker;
    }
    public void setDatepicker(Datepicker datepicker) {
        this.datepicker = datepicker;
    }

}

    public List<FeedBack> find(String Date) {


                //  Transaction t=session.beginTransaction(); 

            String SQL_QUERY = " from FeedBack where date='"+Date+"'";
            System.out.println("i am in hiber");
            System.out.println(SQL_QUERY);
            org.hibernate.Query query = session.createQuery(SQL_QUERY);
            List<FeedBack> list = query.list();
          for(FeedBack f:list){
              System.out.println("price");
              System.out.println(f.getPrice());
          }
            return list;

        }

    <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<s:form>
<body>
 <h1>Struts 2 Iterator tag example</h1>

<h3>Simple Iterator</h3>
<ol>
<s:iterator value="list">
 HE<li><s:property /></li>
</s:iterator>
</ol>
  </body>
  </s:form>
  </html>

    
价格：
    您已经全局声明了
    列表变量

      private List<FeedBack> list =new ArrayList<FeedBack>();//Getter & Setter Method.

    private List=new ArrayList（）//Getter和Setter方法。
    并且需要所有的Getter和Setter方法，并在本地删除您的重新声明

    List List=query.List（）更改为
    list=（list）query.list（）和转换应该是必需的
    
在jsp页面中添加struts库，最后
    

     <s:iterator value="list"/>
      Price: <s:property value="price"/><br>
 </s:iterator> 

    

    
价格：
    

    请检查以下代码
    

    <s:iterator value="list" var="item"> 
<s:property value="%{#item.price}" /> 
</s:iterator> 

    

    

    我必须为price等字段创建getter和setter吗？我对使用迭代器感到困惑，因为即使文本price也没有显示出来，而jsp显示的是struts标记？您应该为
    price
    设置getter，如果您使用的是内部类
    FeedBack
    ，则应该将其设置为外部公共类。发布您的JSP和
    struts.xml
    s:form
    应该位于
    body
    标记内。在属性标记中，使用
    反馈
    对象的属性值。是否必须为价格字段创建getter和setter？我也对使用s:iterator感到困惑，因为连文本价格都没有显示。请帮助Naveen，然后我如何打印列表字段？Sachin请尝试使用此逻辑，这可能会起作用。Naveen不是工作人员，请查看我的action类。我认为我在那里做错了什么。不知道迭代器是如何工作的。请将列表数据与对象数据共享。重写反馈类中的toString（）方法，然后发送列表数据。