将 HTTP 状态代码映射到描述的 Java 库？

Java library to map HTTP status code to description?

提问by Andrzej Doyle

I'm in the situation where I'm writing custom error pages for a webapp (primarily to reduce information disclosure from the servlet container's default error pages). Since I needan error page for each error status code, I'm going to have to have a sensible response for each code. As far as I can tell, these error pages don't have to be particularly user-friendly, but simply redirecting everything to a single "it went wrong" error page is going to make diagnosing problems very difficult.

我正在为 webapp 编写自定义错误页面（主要是为了减少来自 servlet 容器的默认错误页面的信息泄露）。因为我需要每个错误状态代码的错误页面，所以我必须对每个代码做出合理的响应。据我所知，这些错误页面不必对用户特别友好，但简单地将所有内容重定向到一个“出错了”的错误页面会使诊断问题变得非常困难。

So I'm wondering if there is a Java library that provides a good mapping between HTTP status codes and a brief human-readable description of them (ideally a 2-4 word "summary", for use as a page title, as well as a 1-3 sentence message expanding on the summary). Then I could just use this in a JSP to provide some feedback on the class of the error. If not I'm sure I can write one myself, but if wheels have been invented I'm happy to use them.

所以我想知道是否有一个 Java 库可以在 HTTP 状态代码和它们的简短人类可读描述之间提供良好的映射（理想情况下是一个 2-4 个单词的“摘要”，用作页面标题，以及扩展摘要的 1-3 句消息）。然后我可以在 JSP 中使用它来提供有关错误类别的一些反馈。如果没有，我确定我可以自己写一个，但如果轮子已经发明了，我很乐意使用它们。

回答by skaffman

So I'm wondering if there is a Java library that provides a good mapping between HTTP status codes and a brief human-readable description of them (ideally a 2-4 word "summary", for use as a page title, as well as a 1-3 sentence message expanding on the summary).

所以我想知道是否有一个 Java 库可以在 HTTP 状态代码和它们的简短人类可读描述之间提供良好的映射（理想情况下是一个 2-4 个单词的“摘要”，用作页面标题，以及扩展摘要的 1-3 句消息）。

Yes, Apache Commons HttpClienthas this functionality. The HttpStatusclass has the same list of intconstants that you'll find elsewhere, but it also has a static String getStatusText(int)method that returns a human-readable description of the status code.

是的，Apache Commons HttpClient具有此功能。该HttpStatus班有相同的列表int常量，你会发现其他地方，但它也有一个static String getStatusText(int)返回的状态代码的可读性的描述方法。

Here is the Mavendependency:

这是Maven依赖项：

<dependency>
    <groupId>commons-httpclient</groupId>
    <artifactId>commons-httpclient</artifactId>
    <version>3.1</version>
</dependency>

Example code:

示例代码：

import org.apache.commons.httpclient.HttpStatus;

String responseMessage = HttpStatus.getStatusText(HttpStatus.SC_OK);
System.out.println(responseMessage);

Prints:

印刷：

OK

回答by Ed J

I think you might like the Spring solution: http://static.springsource.org/spring/docs/3.0.x/api/org/springframework/http/HttpStatus.html

我想你可能喜欢 Spring 解决方案：http: //static.springsource.org/spring/docs/3.0.x/api/org/springframework/http/HttpStatus.html

回答by Vitali Olshevski

Maybe the easiest solution is to use next function:

也许最简单的解决方案是使用下一个功能：

httpResponse.getStatusLine().getReasonPhrase()

It returns exactly what's needed.

它准确地返回所需的内容。

回答by Chaiavi

Latest apache http components v4+ ( httpCoponents )

最新的 apache http 组件 v4+ ( httpCoponents )

Introduces the following: HttpStatus as an enum containing all of the httpStatuses

引入以下内容： HttpStatus 作为包含所有 httpStatuses 的枚举

For their description use: EnglishReasonPhraseCatalog.INSTANCE.getReason(code, Locale.ENGLISH);

对于他们的描述使用：EnglishReasonPhraseCatalog.INSTANCE.getReason(code, Locale.ENGLISH);

Where your status code == code, eg: 200

您的状态代码 == 代码的位置，例如：200

For example:

例如：

HttpStatus.SC_FORBIDDEN == 403
EnglishReasonPhraseCatalog.INSTANCE.getReason(403, Locale.ENGLISH) == "Forbidden"

回答by Yuval

Abstract class 'HttpURLConnection' provides you with constant int values for all HTTP status codes. Its documentation has a short verbal description for each constant. You could make yourself a simple enum with these values and strings, and use that.

抽象类“ HttpURLConnection”为您提供所有 HTTP 状态代码的常量 int 值。它的文档对每个常量都有简短的口头描述。您可以使用这些值和字符串使自己成为一个简单的枚举，然后使用它。

回答by DanC

If you're using Jersey (or have it on your classpath), the javax.ws.rs.core.Response.Statusenum includes human-readable "reasons" from the HTTP spec, e.g. Response.Status.fromStatusCode(404).toString()gives "Not Found".

如果您正在使用 Jersey（或在您的类路径中使用它），则javax.ws.rs.core.Response.Status枚举包括来自 HTTP 规范的人类可读的“原因”，例如Response.Status.fromStatusCode(404).toString()给出"Not Found".

回答by Erik C. Thauvin

You can use my HttpStatus JSP Tag Libray:

您可以使用我的HttpStatus JSP 标签库：

<%@ page isErrorPage="true" %>
<%@ taglib prefix="hs" uri="http://erik.thauvin.net/taglibs/httpstatus" %>
<html><head>
<title><hs:code/> <hs:reason default="Server Error"/></title>
</head>
<h1><hs:reason default="Server Error"/></h1>
Cause: <pre><hs:cause default="Unable to complete your request."/></pre>  

Specifically, as shown in the example above, the <hs:reason/>tag is used to display the reason phrase (human-readable description) for the current HTTP status code in the page's title and first heading.

具体来说，如上例所示，该<hs:reason/>标签用于在页面的标题和第一个标题中显示当前 HTTP 状态代码的原因短语（人类可读的描述）。

Additionally, the <hs:code/>tag is used to display the current HTTP status code and the <hs:cause/>tag to display the message from the exception that caused the error.

此外，该<hs:code/>标签用于显示当前的 HTTP 状态代码和<hs:cause/>用于显示来自导致错误的异常的消息的标签。