java – Populating使用play框架中的数据库值下拉

我是新玩框架工作,我发现它有点困难.
我正在从数据库中检索客户端名称列表并将其填充到下拉列表中,这是我的client.java 代码

   package models;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.sqlException;
import java.sql.Statement;
import java.util.*;

import play.db.ebean.Model;
public class Client extends Model {

    /**
     * 
     */
    private static final long serialVersionUID = -1932214701504374792L;
    public static String ClientName;
    public static ArrayList<String> Clientdetail= new ArrayList<>();
    public static ArrayList<String> PopulateClient() {
        try {
            Class.forName("com.microsoft.sqlserver.jdbc.sqlServerDriver").newInstance();
            Connection conn = DriverManager.getConnection("jdbc:sqlserver://localhost:1433","SUMEET","sumeet");
            Statement sta = conn.createStatement();
            String sql = "select * from client";
            ResultSet rs = sta.executeQuery(sql);
            while (rs.next()) {
                ClientName = rs.getString("ClientName");
                Clientdetail.add(ClientName);
               }

        } catch (InstantiationException | illegalaccessexception
                | ClassNotFoundException |sqlException e) {
            // Todo Auto-generated catch block
            e.printstacktrace();
        }
        return(Clientdetail);

    }

}

这是我的application.java代码

package controllers;

import models.Client;

import play.mvc.*;
import views.html.*;

public class Application extends Controller {


    public static Result index(){

        return ok(index.render(Client.PopulateClient()));
    }

}

这是我的index.scala.html

    @(ClientDetails: java.util.ArrayList[String])

@main("ADMS") {

   <center>
    <form id="select">
   <a>CONSULTANT</a>
       <select name=Consultant>
           <option value="lokesh">Lokesh</option>
           <option>@ClientDetails</option>
           <option>Vidyasekar</option>
           <option>Abhishek</option>
           <option>Naveen</option>
           <option>Nanda</option>
       </select>
     <table border="1">
       <tr>
       <td width=50px>Client</td>
       <td width=50px>Project</td>
       <td width=50px>Task</td>
       <td width=50px>Date</td>
       <td width=50px>Consultant</td>
       <td width=50px>Role</td>
       <td width=80px>Is Billable</td>
       </tr>
       <tr>
       <td>@ClientDetails</td>
       </tr>
       </table>
      </form>
   </center>
}

main.scala.html

@(title: String)(Content: Html)


<!DOCTYPE html>

<html>
    <head>
        <title>@title</title>
   </head>
    <body>
    @Content
    </body>
</html>

有人可以帮我弄这个吗？我需要使用数组值填充下拉列表,并且填充的数据只是括号 – > “[]”

解决方法:

Play框架提供模板帮助程序库,它提供了使用选项和选定值构建选择下拉列表的功能.
一旦理解正确,使用起来非常简单.

视图中的@helper.select()方法采用与select类型的输入字段相关的各种参数.第一个参数是表单字段,因为这里我们没有任何形式,我们可以创建一个临时表单并在其中创建一个名为Consultant的新字段[因为这将是select字段的name属性的值].
第二个参数是选项的映射,其中键和值分别对应于选项标签的值和选项标签中包含的文本.

控制器代码

package controllers;

import models.Client;

import play.mvc.*;
import views.html.*;

public class Application extends Controller {


    public static Result index(){

        return ok(index.render(Client.getClientDetails()));
    }

}

型号代码

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.sqlException;
import java.sql.Statement;
import java.util.*;

import play.db.ebean.Model;
public class Client extends Model {

    /**
     * 
     */
    private static final long serialVersionUID = -1932214701504374792L;
    public static String ClientName;
    public static HashMap<String, String> Clientdetail= new HashMap<String, String>();
    public static HashMap<String, String> getClientDetails() {
        try {
            Class.forName("com.microsoft.sqlserver.jdbc.sqlServerDriver").newInstance();
            Connection conn = DriverManager.getConnection("jdbc:sqlserver://localhost:1433","SUMEET","sumeet");
            Statement sta = conn.createStatement();
            String sql = "select * from client";
            ResultSet rs = sta.executeQuery(sql);
            while (rs.next()) {
                ClientName = rs.getString("ClientName");
                Clientdetail.put(ClientName,ClientName);
               }

        } catch (InstantiationException | illegalaccessexception
                | ClassNotFoundException |sqlException e) {
            // Todo Auto-generated catch block
            e.printstacktrace();
        }
        return(Clientdetail);

    }

}

查看代码：index.scala.html

@(ClientDetails: java.util.HashMap[String, String])

@import helper._

@main("ADMS") {

   <center>
    <form id="select">
   <a>CONSULTANT</a>
   @select(Form.form()("Consultant"),           
       options(ClientDetails),
       'value -> "clientName1"[any value that should be selected by default])
     <table border="1">
       <tr>
       <td width=50px>Client</td>
       <td width=50px>Project</td>
       <td width=50px>Task</td>
       <td width=50px>Date</td>
       <td width=50px>Consultant</td>
       <td width=50px>Role</td>
       <td width=80px>Is Billable</td>
       </tr>
       <tr>
       <td>@ClientDetails</td>
       </tr>
       </table>
      </form>
   </center>
}

java – Populating使用play框架中的数据库值下拉

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