Jsf Renderer脚本代码是不推荐的

Question

我尝试将内部JS代码放入JS块中。这应该通过h:commandButton的自定义渲染器来完成。Renderer是入站的，可以找到。但是一旦我开始生成脚本块，它被放在<!--和-->之间。

下面是生成脚本块的方法:

     private void writeScript(FacesContext ctx, HtmlCommandButton button, String event, String script) throws IOException {
      String nonce = UUID.randomUUID().toString();
      ResponseWriter writer = ctx.getResponseWriter();
      ctx.setResponseWriter(writer);
      writer.startElement("input", button);
      writer.writeAttribute("type", "submit", null);
      writer.endElement("input");
      writer.startElement("script", button);
      writer.writeAttribute("nonce", nonce, null);
      writer.write("document.getElementById('" + button.getClientId()
         + "')."
         + event
         + " ="
         + " function() {"
         + script
         + "}");
      writer.endElement("script");
   }

同样使用startCDATA()方法似乎不起作用。

所以不是:

<script nonce="...">
document.getElementById('j_id1955899975_7494aa2f:submitButton').alert('hallo') = function() {onclick}
</script>

生成的代码如下:

    <script nonce="...">
    <!--
document.getElementById('j_id1955899975_7494aa2f:submitButton').alert('hallo') = function() {onclick}
    //-->
    </script>

我做错了什么?如果有人能帮我，那就太好了:D

Answer 1

根据Predrag Maric的链接，我将代码更改为:

   private void writeScript(FacesContext ctx, HtmlCommandButton button, String event, String script) throws IOException {
      System.out.println("das event: "+event);
      String nonce = UUID.randomUUID().toString();
      ResponseWriter writer = ctx.getResponseWriter();
      ctx.setResponseWriter(writer);
      writer.startElement("input", button);
      writer.writeAttribute("type", "submit", null);
      writer.writeAttribute("id", button.getClientId(), null);
      writer.endElement("input");
      writer.write("<script>");
      writer.write("document.getElementById('" + button.getClientId()
         + "')."
         + event
         + " ="
         + " function() {"
         + script
         + "}");
      writer.write("</script>");
   }

问题是用ResponseWriter的writeElement()方法编写脚本标签它会自动添加注释…在编码之后，它可以工作了，非常感谢!