如何使用Struts更新和读取Arraylist对象中的单选按钮选择值(每行一个) [英] How to update and read radio button choice value(one for each row) in Arraylist object using struts

问题描述

我正在使用struts 1.3开发一些员工注册应用程序.在一个jsp页面上，一张表显示了所有注册请求，包括该行特定员工的所有详细信息(每个员工注册请求一行).每行包含两个批准和拒绝单选按钮.管理员必须选择任何一个，他可以跳过几行(以使其处于待处理状态).按提交按钮后，如何根据管理员的选择逐个读取所有单选按钮值以更新数据库.

I am developing some employee registration application using struts 1.3. On one jsp page a table shows all the registration requests, including all the details of that particular employee row-wise(One row for each employee registration request). Each row contains two radio buttons approved and reject. Admin has to select any one either he can skip for few rows(for making it pending). After pressing submit button how to read all radio buttons values one by one to update the database according to admin's selection.

我尝试过的:

1. DataAccess.java类(用于处理集合的Bean)

1. DataAccess.java class(Bean for handling collection)

public class DataAccess {

    private String regid,fname,lname,email,eid,contact,address,jdate,qualification,designation,adminchoice,imagepath;
    private String reqdate,approvedate,rejectdate,ipaddress;

    ArrayList<DataAccess> userList;

    //write the public constructors....        
    public DataAccess(){ }

    public DataAccess(String regid,String fname, String lname,String email,String eid,String contact,String address,String jdate,String qualification,String designation,String adminchoice,String imagepath,String reqdate,String approvedate,String rejectdate,String ipaddress)
    {
        this.regid=regid;
        this.fname=fname;
        this.lname=lname;
        this.email=email;
        this.eid=eid;
        this.contact=contact;
        this.address=address;
        this.jdate=jdate;
        this.qualification=qualification;
        this.designation=designation;
        this.adminchoice=adminchoice;
        this.imagepath=imagepath;
        this.reqdate=reqdate;
        this.approvedate=approvedate;
        this.rejectdate=rejectdate;
        this.ipaddress=ipaddress;
    }

    //Setter and getter methods for all properties...

    //for registration id....
    public void setRegid(String regid) { this.regid=regid;}
    public String getRegid(){ return regid;}

    // for first name....   
    public void setFname(String fname) { this.fname=fname;}
    public String getFname() { return fname;}

    //for last name....
    public void setLname(String lname) { this.lname=lname;}
    public String getLname(){ return lname;}

    //for email....
    public void setEmail(String email) { this.email=email;}
    public String getEmail(){ return email;}

    //for eid....
    public void setEid(String eid) { this.eid=eid;}
    public String getEid(){ return eid;}

    //for contact no....
    public void setContact(String contact) { this.contact=contact;}
    public String getContact() { return contact; }

    //for address....
    public void setAddress(String address){ this.address=address;}
    public String getAddress(){ return address;}

    //for joining date....
    public void setJdate(String jdate){ this.jdate=jdate;}
    public String getJdate(){ return jdate;}

    //for qualification....
    public void setQualification(String qualification) { this.qualification=qualification;}
    public String getQualification(){ return qualification; }

    //for experience....
    public void setDesignation(String designation) { this.designation=designation;}
    public String getDesignation() { return designation;}

    //for admin choice....
    public void setAdminchoice(String adminchoice){ this.adminchoice=adminchoice;}
    public String getAdminchoice(){ return adminchoice; }

    //for image path....
    public void setImagepath(String imagepath){ this.imagepath=imagepath;}
    public String getImagepath(){ return imagepath; }

    //for registration request date....
    public void setReqdate(String reqdate) { this.reqdate=reqdate;}
    public String getReqdate(){ return reqdate;}

    //for registration approval date....
    public void setApprovedate(String approvedate) { this.approvedate=approvedate;}
    public String getApprovedate(){ return approvedate;}

    //for registration rejection date....
    public void setRejectdate(String rejectdate) { this.rejectdate=rejectdate;}
    public String getRejectdate(){ return rejectdate;}

    //for ip address....
    public void setIpaddress(String ipaddress) { this.ipaddress=ipaddress;}
    public String getIpaddress(){ return ipaddress;}

    public ArrayList<DataAccess> createList()
    {
        userList=new ArrayList<DataAccess>();
        return userList;
    }

    public void addData(DataAccess da)
    {
        userList.add(da);
    }
}

在我的ActionForm类中

In my ActionForm class

private ArrayList<DataAccess> dataList;
public void setDataList(ArrayList<DataAccess> dataList) {this.dataList = dataList;}
public ArrayList<DataAccess> getDataList() {return dataList;}

在我的Action类中，执行method():此方法将控件发送到一个jsp页面(Pending.jsp)，在其中显示所有未决请求.此页面控件转到相同DispatchAction类的approveUsers(----)方法以更新数据库之后.

In my Action class execute method():this method sends the control to a jsp page(Pending.jsp) where I am displaying all pending requests. After this page control goes to approveUsers(----) method of same DispatchAction class to update the database.

DataAccess dtacs=new DataAccess();
ArrayList<DataAccess> userList=dtacs.createList();

do{
    if(rs3.next())
    {
        System.out.println("BBB.");
        jdate_string=new SimpleDateFormat("dd/MMM/YYYY").format(rs2.getDate(7));
        reqdate_string=new SimpleDateFormat("hh:mm:ss a
        dd/MMM/YYYY").format(rs2.getTimestamp(14)); 

        userList.add(new DataAccess(rs2.getString(1),rs2.getString(3),rs2.getString(4),
        rs3.getString(1),  rs2.getString(13),rs2.getString(5),rs2.getString(6),jdate_string,
        rs2.getString(8),rs2.getString(9),"no",rs2.getString(12),reqdate_string,"Not Approved",
        "Not Rejected",rs3.getString(2)));

        System.out.println(userList.size());
    }//if closing..

} while(rs1.next());

req.setAttribute("data", userList);
return map.findForward("gopending");

我的Jsp页面代码(Pending.jsp)

My Jsp page code(Pending.jsp)

<logic:iterate id="item" name="data" indexId="idx">
    <tr>
        <td><bean:write name="idx"/></td>
        <td><bean:write name="item" property="regid"/></td>
        <td><bean:write name="item" property="eid"/></td>
        <td><bean:write name="item" property="fname"/></td>
        <td><bean:write name="item" property="lname"/></td>
        <td><bean:write name="item" property="designation"/></td>
        <td><bean:write name="item" property="email"/></td>
        <td><bean:write name="item" property="contact"/></td>
        <td><bean:write name="item" property="address"/></td>
        <td><bean:write name="item" property="qualification"/></td>
        <td><bean:write name="item" property="jdate"/></td>
        <td><bean:write name="item" property="reqdate"/></td>
        <td><bean:write name="item" property="ipaddress"/></td>
        <td><html:radio name="item" property="dataList"  indexed="true" value="approved"/></td>
        <td><html:radio name="item" property="dataList"  indexed="true" value="rejected"/></td> 
    </tr>
</logic:iterate>

问题是，如果我不按下单选按钮，它将无法正确显示数据.当我尝试放置单选按钮时(供管理员选择批准还是拒绝) 我收到此错误:

problem is,if I am not putting radio buttons it is displaying data properly. while I am trying to put radio buttons(for admin choice of approv or reject) I am getting this error:

javax.servlet.jsp.JspException: No getter method available for property dataList for bean under name item

我还尝试将这些获取器和设置器放入DataAccess.java(用于收集的Bean类)和AppForm类(FormBean)中，但是没有运气.

I also tried to put these getter and setter in DataAccess.java(Bean class for collection) and AppForm class (FormBean) but no luck..

public void setItem(int index,DataAccess value){this.dataList.add(index,value);}
public DataAccess getItem(int index){return this.dataList.get(index);}

任何帮助，建议将不胜感激.

Any Help, suggestion will be appreciated.

推荐答案

最后，我解决了这个问题.

Finally I solved this problem.

以下是解决此问题的一些建议

Here are some suggestions to handle this issue

1)Follow the above steps.
2)I did a silly mistake, while taking the radio buttons put property="adminchoice" (in my case).
3) Read the corresponding admin choice in the execute method of Action class where control goes after submitting form.

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