使用 Tomcat 对 servlet 表单提交进行 UTF-8 编码 [英] UTF-8 encoding a servlet form submission with Tomcat

问题描述

我正在尝试将包含 unicode 字符的简单表单发布到 servlet 操作.在 Jetty 上，一切正常.在 Tomcat 服务器上，utf-8 字符被破坏.

I'm attempting to post a simple form that includes unicode characters to a servlet action. On Jetty, everything works without a snag. On a Tomcat server, utf-8 characters get mangled.

我得到的最简单的案例:

The simplest case I've got:

表格:

<form action="action" method="post">
  <input type="text" name="data" value="It’s fine">`
</form>`

操作:

class MyAction extends ActionSupport {   
  public void setData(String data) {
    // data is already mangled here in Tomcat
  } 
}

• 我在 server.xml 中的 上有 URIEncoding="UTF-8"
• 动作的第一个过滤器调用 request.setCharacterEncoding("UTF-8");
• 包含表单的页面的内容类型为text/html; charset=UTF-8"
• 向表单添加accept-charset"没有任何区别
• I've got URIEncoding="UTF-8" on <Connector> in server.xml
• The first filter on the action calls request.setCharacterEncoding("UTF-8");
• The content type of the page that contains the form is "text/html; charset=UTF-8"
• Adding "accept-charset" to the form makes no difference

我可以使它工作的唯一两种方法是使用 Jetty 或将其切换为 method="get".两者都使角色顺利通过.

The only two ways I can make it work are to use Jetty or to switch it to method="get". Both of those cause the characters to come through without a problem.

推荐答案

我有 URIEncoding="UTF-8";在 server.xml 中的

这仅与 GET 请求相关.

That's only relevant for GET requests.

动作的第一个过滤器调用 request.setCharacterEncoding("UTF-8");

好的，这应该适用于 POST 请求.你只需要确保如果你没有调用 getParameter()、getReader()、getInputStream() 或其他任何会在调用 setCharacterEncoding() 之前触发解析请求正文.

Fine, that should apply on POST requests. You only need to make sure that if you haven't called getParameter(), getReader(), getInputStream() or anything else which would trigger parsing the request body before calling setCharacterEncoding().

包含表单的页面的内容类型是"text/html;charset=UTF-8"

你究竟是如何设置的?如果在 <meta> 中完成，那么您需要了解当页面通过 HTTP 和 HTTP Content- 提供服务时，浏览器会忽略类型 响应头存在.普通的网络服务器已经默认设置了它. 内容类型将仅在页面保存到本地磁盘并从那里查看时使用.

How exactly are you setting it? If done in a <meta>, then you need to understand that this is ignored by the browser when the page is served over HTTP and the HTTP Content-Type response header is present. The average webserver namely already sets it by default. The <meta> content type will then only be used when the page is saved to local disk and viewed from there.

要正确设置响应头字符集，请将以下内容添加到 JSP 的顶部:

To set the response header charset properly, add the following to top of your JSP:

<%@page pageEncoding="UTF-8" %>

顺便说一下，这也会告诉服务器以给定的字符集发送响应.

This will by the way also tell the server to send the response in the given charset.

添加接受字符集"；对形式没有区别

它只在 MSIE 中有所不同，但即便如此，它还是错误地使用了它.反正整个属性一文不值.算了.

It only makes difference in MSIE, but even then it is using it wrongly. The whole attribute is worthless anyway. Forget it.

• Unicode - 如何正确获取字符?

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