我是框架工作的新手，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>
有人可以帮我解决这个问题吗？我需要用数组值填充下拉列表，并且填充的数据只是括号 --> "[]"
最佳答案
Play 框架提供模板帮助程序库，该库提供使用选项和选定值构建选择下拉列表的功能。 一旦正确理解，使用起来非常简单。
View 中的@helper.select()方法采用与选择类型的输入字段相关的各种参数。第一个参数是表单字段，因为这里没有任何表单，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[因为这将是选择字段的 name 属性的值]。 第二个参数将是选项映射，其中键和值分别对应于选项标记的值和选项标记中包含的文本。
Controller 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>
}
关于java - 使用游戏框架中数据库中的值填充下拉列表，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/29433509/