将请求参数作为UTF-8编码字符串传递 [英] Passing request parameters as UTF-8 encoded strings
问题描述
我创建了一个简单的登录页面，并且想要将登录名和密码参数作为UTF-8编码的字符串传递。正如你在下面的代码中可以看到的，第一行是我将编码设置为UTF-8，但似乎这是无意义的，因为它不工作。当我使用带有口音的登录和密码参数时，结果页面会收到奇怪的字符。
I am creating a simple login page and I want to pass login and password parameters as UTF-8 encoded strings. As you can see in the code below, the first line is where I set encoding to UTF-8, but it seems this is pointless because it doesn't work. When I use login and password parameters with accents the result page receives strange characters.
如何正确设置字符编码的方式适用于所有浏览器？
How to set character encoding correctly in a way that works in all browsers?
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>My Page</title>
</head>
<body>
<h1>Welcome to My Page</h1>
<form name="login" action="login.jsp" method="POST">
Login:<br/>
<input type="text" name="login" value="" /><br/>
Password:<br/>
<input type="password" name="password" value="" /><br/>
<br/>
<input type="submit" value="Login" /><br/>
</form>
</body>
</html>
推荐答案
pageEncoding 只设置HTTP Content-Type 头的响应字符编码和 charset 属性。基本上，它告诉服务器在将其发送到客户端之前将由JSP生成的字符解码为UTF-8，并且头部告诉客户端使用UTF-8对它们进行编码，并且在同一页面中的任何形式以提交回服务器。 contentType 已默认为 text / html ，所以以下是足够的：
The pageEncoding only sets the response character encoding and the charset attribute of the HTTP Content-Type header. Basically, it tells the server to decode the characters produced by JSP as UTF-8 before sending it to the client and the header tells the client to encode them using UTF-8 and also to use it when any forms in the very same page is to be submitted back to the server. The contentType already defaults to text/html, so below is sufficient:
<%@page pageEncoding="UTF-8"%>
当通过HTTP提供页面时，HTML元标记被忽略。只有当客户端将页面保存为本地磁盘系统上的HTML文件，然后通过 file：// URI打开
The HTML meta tag is ignored when the page is served over HTTP. It's only been used when the page is by the client saved as a HTML file on local disk system and then opened by a file:// URI in browser.
在您的特定情况下，HTTP请求正文编码显然没有设置为UTF-8。请求正文编码需要通过> ServletRequest＃setCharacterEncoding（） 在
In your particular case, the HTTP request body encoding is apparently not been set to UTF-8. The request body encoding needs to be set by ServletRequest#setCharacterEncoding() in the servlet or a filter before the first call on request.getXxx() is ever made in any servlet or filter involved in the request.
request.setCharacterEncoding("UTF-8");
String login = request.getParameter("login");
String password = request.getParameter("password");
// ...
另请参阅：
- 如何设置请求
- 为什么POST不尊重字符集，但AJAX请求呢？
- http://stackoverflow.com/questions/14177914/passing-turkish-char-from-form-to-java-class-with-struts2/
- Unicode - 如何获取字符？
- How to set request encoding in Tomcat?
- Why does POST not honor charset, but an AJAX request does? tomcat 6
- http://stackoverflow.com/questions/14177914/passing-turkish-char-from-form-to-java-class-with-struts2/
- Unicode - How to get the characters right?
See also:
这篇关于将请求参数作为UTF-8编码字符串传递的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
