[英]How to include another jsp page from custom jsp tag
I want to have a custom Jsp tag with one string attribute, if this is aa path to another jsp file then I want to include that JSP in the page (behave as a jsp:include); 如果没有,那么我只想 output 页面正文中的字符串。
我不知道怎么做 jsp:include 部分...
我看到 SimpleTagSupport 中有一个 setJspBody 可以传递一个 JspFragment ......但我不知道如何得到它......我希望在 javax.servlet.jsp 中找到类似 IncludeTag class 的东西,我可以委托这个逻辑就像setJspBody( new IncludeTag(...).getJspFragment() )
但我没有找到 class 在文档中实现 jsp:include 功能的内容。
public class MyIncludeTag extends TagSupport {
private String page;
//getters setters
@Override
public int doStartTag() throws JspException {
try {
pageContext.include(page);
} catch (ServletException | IOException e) {
throw new JspException("Failed to include " + page, e);
}
return super.doStartTag();
}
}
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