java - 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)

Question

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，表格显示所有注册请求，包括该特定员工的所有详细信息(每个员工注册请求一行)。每行包含两个单选按钮批准和拒绝。管理员必须选择任何一个，或者他可以跳过几行(以使其处于待处理状态)。按提交按钮后，如何一一读取所有单选按钮的值，以根据管理员的选择更新数据库。

我尝试过:

1. DataAccess.java类(用于处理集合的Bean)

   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);
       }
   }
   

2. 在我的 ActionForm 类中

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

3. 在我的 Action 类中执行 method():此方法将控件发送到 jsp 页面(Pending.jsp)，我在其中显示所有待处理的请求。此页面控件转到同一 DispatchAction 类的approveUsers(----)方法后更新数据库。

   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");
   

4. 我的Jsp页面代码(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，如果我没有放置单选按钮，它就会正确显示数据。当我尝试放置单选按钮时(供管理员选择批准或拒绝)我收到此错误:

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

我还尝试将这些 getter 和 setter 放入 DataAccess.java(用于收集的 Bean 类)和 AppForm 类(FormBean)中，但没有成功..

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。

Answer 1

终于解决了这个问题。

以下是处理此问题的一些建议

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.