Struts2 - 如何将 JSP 页面的结果作为操作类中的字符串获取(用于电子邮件)

2022-01-16 00:00:00 html java jsp struts2 velocity

我想同时实现这两件事.

I want to achieve the 2 things at the same time.

我在 Struts2 中有一个常规的 jsp 页面.xx/yy/zz/email.jsp

I have a regular jsp page in Struts2. xx/yy/zz/email.jsp

<html>
<head>
</head>
<body>
    <s:property value="email"/>
</body>
</html>

这个页面的url可以是xx/yy/zz/myEmail.action，而一些action类会处理它...

The url of this page could be xx/yy/zz/myEmail.action, while some action class will handle it...

public class MyEmailAction {
    private String email;
    public String execute(){
        this.email = 'abc@xyz.com''
    }
    //setter and getter for 'email'
    ......
}

现在，我想做另一个动作，将 xx/yy/zz/myEmail.action 页面的结果作为电子邮件发送.

Now, I would like to have another action, which sends the result of the page of xx/yy/zz/myEmail.action as email.

public class MyEmailAction {
    private String email;
    public String execute(){
        this.email = 'abc@xyz.com''
    }

    public String send() {
        this.email = 'abc@xyz.com''
        Map mapping;
        //put this.email into the mapping
        String result = getResultOfJSP('../../../xx/yy/zz/email.jsp', mapping);
        Email.send('me@me.com', 'you@you.com', 'My Subject', result);
    }
    //setter and getter for 'email'
    ......
}

所以问题是:如何将渲染的 JSP 的结果作为字符串获取?

So the question is that: HOW CAN I GET THE RESULT OF A RENDERED JSP AS A STRING?

我想要这个的原因显然是我想在一个地方管理这个模板(email.jsp).

This reason why I want this is obviously that I want to manage this template in one place (email.jsp).

我知道我可以使用另一个速度 (vm) 页面，它与 jsp 具有完全相同的 html，但使用速度标记.但是每当我需要对这个模板进行更改时，我都必须在两个地方都这样做.

I know I could use another velocity (vm) page which has exact the same html as the jsp but with velocity markups instead. But then whenever I need to make a change to this template, I have to do it on both places.

我想我也可以使用 URL 来获取结果，但我不喜欢使用这种方式，因为它是对服务器的另一个请求.

I think I could also use URL to grab the result, but I prefer not to use this way as it's another request to the server.

谢谢

推荐答案

我在使用邮件 servlet 时遇到了这个问题，使用它来获取 jsp 的结果作为字符串:

I had this problem with using a mailing servlet use this to get the result of the jsp as a string:

HttpServletResponseWrapper responseWrapper = new HttpServletResponseWrapper(response) {
private final StringWriter sw = new StringWriter();

@Override
public PrintWriter getWriter() throws IOException {
    return new PrintWriter(sw);
}

@Override
public String toString() {
    return sw.toString();
}
};
request.getRequestDispatcher("email.jsp").include(request,
    responseWrapper);
String result = responseWrapper.toString();

设置邮箱给html内容:

Set the email to give html content:

Email.send('me@me.com', 'you@you.com', 'My Subject', result);

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