UTF-8使用Tomcat编码servlet表单提交

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，一切都没有障碍。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>`

行动：

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

我在server.xml中的< Connector> 上有URIEncoding =UTF-8

操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是text / html; charset = UTF-8

在表单中添加accept-charset没有区别

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

我能使其工作的唯一两种方法是使用Jetty或将其切换为method =get。这两个都导致角色没有问题。

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.

答

我'在server.xml中的< Connector> 上获得URIEncoding =UTF-8

I've got URIEncoding="UTF-8" on <Connector> in server.xml

这仅与GET请求相关。

That's only relevant for GET requests.

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

很好，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（）或在调用 setCharacterEncoding（）之前触发解析请求正文的任何其他内容。

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

你如何设置？如果在< meta> 中完成，那么当页面通过HTTP提供时，您需要了解浏览器忽略 HTTP Content-Type 响应标头存在。平均网络服务器默认已经设置了它。只有当页面保存到本地磁盘并从那里查看时，才会使用< meta> 内容类型。

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.

要正确设置响应标头字符集，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" %>

顺便提一下，这也会告诉服务器在给定的字符集中发送响应。

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

在表单中添加accept-charset没有区别

它只会在MSIE中产生差异，但即便如此，它也会错误地使用它。无论如何，整个属性都毫无价值。算了吧。

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

Unicode - 如何让角色正确？

Unicode - How to get the characters right?

UTF-8使用Tomcat编码servlet表单提交

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