我正在尝试使用play执行一个简单的java程序。我收到编译错误,因为非法启动简单表达式。我已经搜索了这个问题的答案,但我没有得到它。我的代码如下所示:
@(products :List[Product])
@main("Products catalogue")
<h1> All Products </h1>
<table class="table table-striped">
<thead>
<tr>
<th> EAN </th>
<th> NAME </th>
<th> DESCRIPTION </th>
</tr>
</thead>
<tbody>
@for(product <- products)
{
<tr>
<td><a href="@routes.Products.details(product.ean)"> @product.ean </a></td>
<td><a href="@routes.Products.details(product.ean)"> @product.name </a></td>
<td><a href="@routes.Products.details(product.ean)"> @product.description </a></td>
</tr>
}
</tbody>
</table>
我在for循环中收到错误。你可以帮我解决这个问题吗?
答案 0 :(得分:1)
花括号必须与@for
@for(product <- products){
如果在Play应用程序中使用java,请注意scala模板中的值。例如,product.ean
只有在类ean
中将public
属性声明为Product
时才有效。如果使用经典bean,则需要编写方法名称,如product.getEan
我对您的代码进行了验证,并且运行正常:
模型/ Product.java
package models;
public class Product{
private String ean;
private String name;
private String description;
public Product(){};
public String getEan(){
return ean;
}
public void setEan(String ean){
this.ean = ean;
}
public String getName(){
return name;
}
public void setName(String name){
this.name = name;
}
public String getDescription(){
return description;
}
public void setDescription(String description){
this.description = description;
}
}
控制器/ Application.java
package controllers;
import play.*;
import play.mvc.*;
import views.html.*;
import models.Product;
import java.util.List;
import java.util.ArrayList;
public class Application extends Controller {
public Result index() {
List<Product> products = new ArrayList<>();
Product product1 = new Product();
product1.setName("p 1");
product1.setEan("ean_1");
product1.setDescription("description 1");
products.add(product1);
return ok(index.render(products));
}
}
CONF /路由
# Home page
GET / controllers.Application.index()
视图/ index.scala.html
@(products :List[Product])
<h1> All Products </h1>
<table class="table table-striped">
<thead>
<tr>
<th> EAN </th>
<th> NAME </th>
<th> DESCRIPTION </th>
</tr>
</thead>
<tbody>
@for(product <- products){
<tr>
<td><a href="@routes.Application.index()"> @product.getEan </a></td>
<td><a href="@routes.Application.index()"> @product.getName </a></td>
<td><a href="@routes.Application.index()"> @product.getDescription </a></td>
</tr>
}
</tbody>
</table>
<强>结果:强>
<h1> All Products </h1>
<table class="table table-striped">
<thead>
<tr>
<th> EAN </th>
<th> NAME </th>
<th> DESCRIPTION </th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="/"> ean_1 </a></td>
<td><a href="/"> p 1 </a></td>
<td><a href="/"> description 1 </a></td>
</tr>
</tbody>
</table>
答案 1 :(得分:0)
您的观点必须是:
@(products :List[Product])
@main("Products catalogue") {
<h1> All Products </h1>
<table class="table table-striped">
<thead>
<tr>
<th> EAN </th>
<th> NAME </th>
<th> DESCRIPTION </th>
</tr>
</thead>
<tbody>
@for(product <- products) {
<tr>
<td><a href="@routes.Products.details(product.ean)"> @product.ean </a></td>
<td><a href="@routes.Products.details(product.ean)"> @product.name </a></td>
<td><a href="@routes.Products.details(product.ean)"> @product.description </a></td>
</tr>
}
</tbody>
</table>
}