Question

参考：HTML forms, php and apostrophes

我一直在尝试将数据从我的HTML表单传递到我的servlet进行处理。但是，我注意到我在文本输入中丢失了撇号。我不确定这是客户端还是服务器端处理错误，但通过上面的参考，我想我需要在servlet端进行一些处理？尝试寻找替代上述的servlet但找不到任何。

以下是代码段：

Html表格：

<form method="post" action="CreateThreadServlet">
                        <b>Title</b><br>
                        <input type="text" name="title" size="60%" placeholder="Enter your title here"/><br>

                        <br><b>Tags</b><br>
                        <input type="text" name="tags" placeholder="Additional Tags: comma separated, e.g. Gamification, Java" size="60%" /><br>  

                        <br><b>Details</b><br>
                        <textarea name="content" style="width:100%;height:50%"></textarea>
                        <input type="hidden" name="nick" value=<%=nick%>>
                        <input type="hidden" name="userid" value=<%=userid%>>
                        <button type="button" style='float: right;' onClick="closeDimmer()">Cancel</button>
                        <input type="submit" name="Submit" value="Submit" text-align='center' style='float: right;'>

                    </form>

这是处理表单的servlet代码：

String userid = req.getParameter("userid");
    String nick = req.getParameter("nick");
    String title = null; //tried using the URLDecoder, doesn't work
    try {
        title = URLDecoder.decode(req.getParameter("title"), "UTF-8");
    } catch (UnsupportedEncodingException ex) {
        Logger.getLogger(CreateThreadServlet.class.getName()).log(Level.SEVERE, null, ex);
    }
    String tags = req.getParameter("tags");
    String[] tagStr = tags.split(",");
    String[] addTags = req.getParameterValues("addTags");

请帮助NEWBIE。

Answer 1

正如this链接所解释的那样，您可以简单地配置过滤器

<filter>
    <filter-name>HitCounterFilter </filter-name>
    <filter-class>
        net.my.filters.HitCounterFilter
    </filter-class>
</filter>
<filter-mapping>
    <filter-name>HitCounterFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

有这个：

public final class HitCounterFilter implements Filter {
   private FilterConfig filterConfig = null;
   public void init(FilterConfig filterConfig) 
      throws ServletException {
      this.filterConfig = filterConfig;
   }
   public void destroy() {
      this.filterConfig = null;
   }
   public void doFilter(ServletRequest request,
      ServletResponse response, FilterChain chain) 
      throws IOException, ServletException {
     if (request.getCharacterEncoding() == null) {
        request.setCharacterEncoding("UTF-8");
     }
     chain.doFilter(request, wrapper);
   }
}

所以你强制 UTF-8 编码。

丢失从HTML表单到Java Servlet的数据（特别是撇号）

1 个答案: