Question

尝试在把手上渲染一些对象的变量时遇到以下问题：

我已经宣布了一个静态对象

public static class Banana
{
    public static String name = "PAPI PAPI";
    public static int id= 9;

    public Banana( )
    {

    }

    @Override
    public String toString() {
        return "Banana{" +
                       "id=" + id +
                       ", name='" + name + '\'' +
                       '}';
    }
}

下一步是尝试在把手上呈现我的对象变量。为此，我做了以下工作：

static void test(RoutingContext ctx)
{
    HttpServerRequest req = ctx.request();
    HttpServerResponse resp = ctx.response();
    resp.setChunked(true);

    resp.putHeader("content-type", "text/html");

    ctx.put("banana", new Banana());
    engine.render(ctx, "src/main/java/templates","/banana.hbs",
         res -> {
             if (res.succeeded()) {
                 ctx.response().end(res.result());
             } else {
                 ctx.fail(res.cause());
             }});
}

我的模板（banana.hbs）如下：

<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
    <h1>{{banana.id}}</h1>
    <h1>{{banana.name}}</h1>
</body>

问题是我的Html是空的：

<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
    <h1></h1>
    <h1></h1>
</body>

有人可以帮忙吗？提前谢谢，

Answer 1

我认为您的问题是，您尝试在您的上下文中放置id的非静态实例，并且通过getter无法访问name和public class Banana { private String name; private Integer id; public Banana(Integer id, String name) { this.name = name; this.id = id; } // ... toString, Getters and setters ... static class Default() { private static final Banana instance = new Banana(9, "PAPI PAPI"); public static Banana getInstance() { return instance; } } }属性/ setter方法。

我认为您可以尝试更改类定义：

ctx.put("banana", Banana.Default.getInstance());

然后：

import bs4 , requests
# ask how many links he will pass
print('How many links do you want wo scrape ?')
link_numb = int(input())

# get the links 
print('please enter full Ebay link  ..')
links = [input() for _ in range(link_numb)]

def ebayprice(link):
    res = requests.get(link)
    res.raise_for_status()

    txt = bs4.BeautifulSoup(res.text , 'html.parser')
    csselement = txt.select('#mm-saleDscPrc')
    return csselement[0].text.strip()

for link in links:
    price = ebayprice(link)
    print(price)

HandleBars不呈现对象变量

1 个答案: