utf-8格式在tomcat服务器的servlet中不起作用 [英] UtF-8 format not working in servlet for tomcat server

问题描述

我有一个Java Servlet，它可以通过ajax javascript从HTML接受数据. HTML从用户那里接收印地文文本，并通过ajax将其发送到servlet中.我在所有地方都指定了UTF-8格式，但是它不起作用.

I have a Java Servlet which accepts data from HTML through ajax javascript. Html receives hindi text from user and sends it through ajax into a servlet. I have specified UTF-8 format everywhere but it is not working.

我已将请求和响应编码设置为utf-8，但仍然无法正常工作. 服务器是Tomcat.

I have set request and response encoding as utf-8 , still not working. The server is Tomcat.

如果有人可以提供帮助.

If anyone can help.

推荐答案

按照以下步骤将Tomcat配置为正确地服务于UTF-8页面(这是波斯语，阿拉伯语或从右到左书写的任何语言):

Follow the following steps to configure your Tomcat to serve your UTF-8 pages correctly either this is Persian, Arabic or any language that is written from right to left:

(1)如下编辑您的server.xml

(1) Edit your server.xml as following

2)CharsetFilter强制Java Web应用处理UTF-8编码的所有请求和响应.这就要求我们定义一个字符集过滤器，如下所示:

2) CharsetFilter force the java webapp to handle all requests and responses as UTF-8 encoded. This requires that we define a character set filter like the following:

package charsetFilter.classes;

package charsetFilter.classes;

 import java.io.IOException;
 import javax.servlet.Filter;
 import javax.servlet.FilterChain;
 import javax.servlet.FilterConfig;
 import javax.servlet.ServletException;
 import javax.servlet.ServletRequest;
 import javax.servlet.ServletResponse;

public class CharsetFilter implements Filter{
    private String encoding;

    public void init(FilterConfig config) throws ServletException{
            encoding = config.getInitParameter("requestEncoding");
            if( encoding==null ) encoding="UTF-8";
    }

    public void doFilter(ServletRequest request, ServletResponse response, FilterChain       next)
    throws IOException, ServletException{           
            if(null == request.getCharacterEncoding())
            request.setCharacterEncoding(encoding);             
        response.setContentType("text/html; charset=UTF-8");
        response.setCharacterEncoding("UTF-8");
            next.doFilter(request, response);
    }

        public void destroy(){}
}   

此过滤器可确保如果浏览器未设置请求中使用的编码，则将其设置为UTF-8.该过滤器完成的另一件事是设置默认响应编码，即.返回的html/所使用的编码.另一种方法是在应用程序的每个控制器中设置响应编码等.

This filter makes sure that if the browser hasn't set the encoding used in the request, that it's set to UTF-8. The other thing done by this filter is to set the default response encoding ie. the encoding in which the returned html/whatever is. The alternative is to set the response encoding etc. in each controller of the application.

3)然后将该过滤器添加到web.xml中，如下所示:

3) Then add this filter to the web.xml like:

字符集过滤器 charsetFilter.classes.CharsetFilter requestEncoding UTF-8

CharsetFilter charsetFilter.classes.CharsetFilter requestEncoding UTF-8

<filter-mapping>
        <filter-name>CharsetFilter</filter-name>
        <url-pattern>/*</url-pattern>
</filter-mapping>

然后将您的servlet编写为:

Then write your servlet as:

request.setCharacterEncoding("UTF-8");
response.setContentType("text/html; charset=UTF-8");
response.setCharacterEncoding("UTF-8");

，并使用您要在servlet中使用的任何语言.

and use whatever language you want to use in your servlet.

您可以使用它来获取参数:

You can use this for getting parameters:

字符串输入=新的字符串(request.getParameter("foo").getBytes("iso-8859-1")，"utf-8");

String input = new String(request.getParameter("foo").getBytes("iso-8859-1"), "utf-8");

干杯！

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